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CapturePictureUtils 截图工具类

支持 View、Activity、FrameLayout、RelativeLayout、LinearLayout、ListView、GridView、ScrollView、HorizontalScrollView、NestedScrollView、WebView、RecyclerView(GridLayoutManager、LinearLayoutManager、StaggeredGridLayoutManager)

截图工具类 -> CapturePictureUtils.java 方法注释setBitmapConfig设置 Bitmap ConfigsetBackgroundColor设置 Canvas 背景色setPaint设置画笔snapshotWithStatusBar获取当前屏幕截图, 包含状态栏 ( 顶部灰色 TitleBar 高度, 没有设置 android:theme 的 NoTitleBar 时会显示 )snapshotWithoutStatusBar获取当前屏幕截图, 不包含状态栏 ( 如果 android:theme 全屏, 则截图无状态栏 )enableSlowWholeDocumentDraw关闭 WebView 优化snapshotByWebView截图 WebViewsnapshotByView通过 View 绘制为 BitmapsnapshotByViewCache通过 View Cache 绘制为 BitmapsnapshotByLinearLayout通过 LinearLayout 绘制为 BitmapsnapshotByFrameLayout通过 FrameLayout 绘制为 BitmapsnapshotByRelativeLayout通过 RelativeLayout 绘制为 BitmapsnapshotByScrollView通过 ScrollView 绘制为 BitmapsnapshotByHorizontalScrollView通过 HorizontalScrollView 绘制为 BitmapsnapshotByNestedScrollView通过 NestedScrollView 绘制为 BitmapsnapshotByListView通过 ListView 绘制为 BitmapsnapshotByGridView通过 GridView 绘制为 BitmapsnapshotByRecyclerView通过 RecyclerView 绘制为 Bitmap package dev.utils.app; import android.app.Activity; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.Picture; import android.graphics.Point; import android.graphics.Rect; import android.os.Build; import android.support.annotation.ColorInt; import android.support.v4.widget.NestedScrollView; import android.support.v7.widget.GridLayoutManager; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.StaggeredGridLayoutManager; import android.util.DisplayMetrics; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.webkit.WebView; import android.widget.FrameLayout; import android.widget.GridView; import android.widget.HorizontalScrollView; import android.widget.LinearLayout; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.ScrollView; import dev.DevUtils; import dev.utils.LogPrintUtils; /** * detail: 截图工具类 * @author Ttt * <pre> * 截图 * @see <a href="https://www.cnblogs.com/angel88/p/7933437.html"/> * WebView 截长图解决方案 * @see <a href="https://www.jianshu.com/p/0faa70e88441"/> * X5 WebView 使用 snapshotWholePage 方法清晰截图 * @see <a href="https://www.v2ex.com/t/583020"/> * </pre> */ public final class CapturePictureUtils { private CapturePictureUtils() { } // 日志 TAG private static final String TAG = CapturePictureUtils.class.getSimpleName(); // Bitmap Config private static Bitmap.Config BITMAP_CONFIG = Bitmap.Config.RGB_565; // Canvas 背景色 private static int BACKGROUND_COLOR = Color.TRANSPARENT; // 画笔 private static Paint PAINT = new Paint(); // ============ // = 配置相关 = // ============ /** * 设置 Bitmap Config * @param config {@link Bitmap.Config} */ public static void setBitmapConfig(final Bitmap.Config config) { if (config == null) return; BITMAP_CONFIG = config; } /** * 设置 Canvas 背景色 * @param backgroundColor 背景色 */ public static void setBackgroundColor(@ColorInt final int backgroundColor) { BACKGROUND_COLOR = backgroundColor; } /** * 设置画笔 * @param paint {@link Paint} */ public static void setPaint(final Paint paint) { if (paint == null) return; PAINT = paint; } // ======== // = 截图 = // ======== // ============ // = Activity = // ============ /** * 获取当前屏幕截图, 包含状态栏 ( 顶部灰色 TitleBar 高度, 没有设置 android:theme 的 NoTitleBar 时会显示 ) * @param activity {@link Activity} * @return 当前屏幕截图, 包含状态栏 */ public static Bitmap snapshotWithStatusBar(final Activity activity) { try { View view = activity.getWindow().getDecorView(); view.setDrawingCacheEnabled(true); // 重新创建绘图缓存, 此时的背景色是黑色 view.buildDrawingCache(); // 获取绘图缓存, 注意这里得到的只是一个图像的引用 Bitmap cacheBitmap = view.getDrawingCache(); if (cacheBitmap == null) return null; // 获取屏幕宽度 int[] widthHeight = getScreenWidthHeight(); Rect frame = new Rect(); activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame); // 创建新的图片 Bitmap bitmap = Bitmap.createBitmap(cacheBitmap, 0, 0, widthHeight[0], widthHeight[1]); // 释放绘图资源所使用的缓存 view.destroyDrawingCache(); return bitmap; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotWithStatusBar"); } return null; } /** * 获取当前屏幕截图, 不包含状态栏 ( 如果 android:theme 全屏, 则截图无状态栏 ) * @param activity {@link Activity} * @return 当前屏幕截图, 不包含状态栏 */ public static Bitmap snapshotWithoutStatusBar(final Activity activity) { try { View view = activity.getWindow().getDecorView(); view.setDrawingCacheEnabled(true); // 重新创建绘图缓存, 此时的背景色是黑色 view.buildDrawingCache(); // 获取绘图缓存, 注意这里得到的只是一个图像的引用 Bitmap cacheBitmap = view.getDrawingCache(); if (cacheBitmap == null) return null; // 获取屏幕宽度 int[] widthHeight = getScreenWidthHeight(); // 获取状态栏高度 int statusBarHeight = getStatusBarHeight(activity); Rect frame = new Rect(); activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame); // 创建新的图片 Bitmap bitmap = Bitmap.createBitmap(cacheBitmap, 0, statusBarHeight, widthHeight[0], widthHeight[1] - statusBarHeight); // 释放绘图资源所使用的缓存 view.destroyDrawingCache(); return bitmap; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotWithoutStatusBar"); } return null; } // =========== // = WebView = // =========== /** * 关闭 WebView 优化 * <pre> * 推荐在 setContentView 前调用 * {@link CapturePictureUtils#snapshotByWebView} * </pre> */ public static void enableSlowWholeDocumentDraw() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { android.webkit.WebView.enableSlowWholeDocumentDraw(); } } /** * 截图 WebView * @param webView {@link WebView} * @return {@link Bitmap} */ public static Bitmap snapshotByWebView(final WebView webView) { return snapshotByWebView(webView, Integer.MAX_VALUE, BITMAP_CONFIG, 0f); } /** * 截图 WebView * @param webView {@link WebView} * @param maxHeight 最大高度 * @return {@link Bitmap} */ public static Bitmap snapshotByWebView(final WebView webView, final int maxHeight) { return snapshotByWebView(webView, maxHeight, BITMAP_CONFIG, 0f); } /** * 截图 WebView * @param webView {@link WebView} * @param scale 缩放比例 * @return {@link Bitmap} */ public static Bitmap snapshotByWebView(final WebView webView, final float scale) { return snapshotByWebView(webView, Integer.MAX_VALUE, BITMAP_CONFIG, scale); } /** * 截图 WebView * @param webView {@link WebView} * @param maxHeight 最大高度 * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByWebView(final WebView webView, final int maxHeight, final Bitmap.Config config) { return snapshotByWebView(webView, maxHeight, config, 0f); } /** * 截图 WebView * <pre> * TODO 在 Android 5.0 及以上版本, Android 对 WebView 进行了优化, 为了减少内存使用和提高性能 * TODO 使用 WebView 加载网页时只绘制显示部分, 如果我们不做处理, 就会出现只截到屏幕内显示的 WebView 内容, 其它部分是空白的情况 * TODO 通过调用 WebView.enableSlowWholeDocumentDraw() 方法可以关闭这种优化, 但要注意的是, 该方法需要在 WebView 实例被创建前就要调用, * TODO 否则没有效果, 所以我们在 WebView 实例被创建前加入代码 * {@link CapturePictureUtils#enableSlowWholeDocumentDraw} * </pre> * @param webView {@link WebView} * @param maxHeight 最大高度 * @param config {@link Bitmap.Config} * @param scale 缩放比例 * @return {@link Bitmap} */ public static Bitmap snapshotByWebView(final WebView webView, final int maxHeight, final Bitmap.Config config, final float scale) { if (webView != null && config != null) { // Android 5.0 以上 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { try { float newScale = scale; if (newScale <= 0) { // 该方法已抛弃, 可通过 setWebViewClient // onScaleChanged(WebView view, float oldScale, float newScale) // 存储并传入 newScale newScale = webView.getScale(); } int width = webView.getWidth(); int height = (int) (webView.getContentHeight() * newScale + 0.5); // 重新设置高度 height = (height > maxHeight) ? maxHeight : height; // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); webView.draw(canvas); return bitmap; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByWebView - SDK_INT >= 21(5.0)"); } } else { try { Picture picture = webView.capturePicture(); int width = picture.getWidth(); int height = picture.getHeight(); if (width > 0 && height > 0) { // 重新设置高度 height = (height > maxHeight) ? maxHeight : height; // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); picture.draw(canvas); return bitmap; } } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByWebView - SDK_INT < 21(5.0)"); } } } return null; } // ======== // = View = // ======== /** * 通过 View 绘制为 Bitmap * @param view {@link View} * @return {@link Bitmap} */ public static Bitmap snapshotByView(final View view) { return snapshotByView(view, BITMAP_CONFIG); } /** * 通过 View 绘制为 Bitmap * @param view {@link View} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByView(final View view, final Bitmap.Config config) { if (view == null || config == null) return null; try { Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); view.layout(view.getLeft(), view.getTop(), view.getRight(), view.getBottom()); view.draw(canvas); return bitmap; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByView"); } return null; } /** * 通过 View Cache 绘制为 Bitmap * @param view {@link View} * @return {@link Bitmap} */ public static Bitmap snapshotByViewCache(final View view) { if (view == null) return null; try { // 清除视图焦点 view.clearFocus(); // 将视图设为不可点击 view.setPressed(false); // 获取视图是否可以保存画图缓存 boolean willNotCache = view.willNotCacheDrawing(); view.setWillNotCacheDrawing(false); // 获取绘制缓存位图的背景颜色 int color = view.getDrawingCacheBackgroundColor(); // 设置绘图背景颜色 view.setDrawingCacheBackgroundColor(0); if (color != 0) { // 获取的背景不是黑色的则释放以前的绘图缓存 view.destroyDrawingCache(); // 释放绘图资源所使用的缓存 } // 重新创建绘图缓存, 此时的背景色是黑色 view.buildDrawingCache(); // 获取绘图缓存, 注意这里得到的只是一个图像的引用 Bitmap cacheBitmap = view.getDrawingCache(); if (cacheBitmap == null) return null; Bitmap bitmap = Bitmap.createBitmap(cacheBitmap); // 释放位图内存 view.destroyDrawingCache(); // 回滚以前的缓存设置、缓存颜色设置 view.setWillNotCacheDrawing(willNotCache); view.setDrawingCacheBackgroundColor(color); return bitmap; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByViewCache"); } return null; } // ================ // = LinearLayout = // ================ /** * 通过 LinearLayout 绘制为 Bitmap * @param linearLayout {@link LinearLayout} * @return {@link Bitmap} */ public static Bitmap snapshotByLinearLayout(final LinearLayout linearLayout) { return snapshotByLinearLayout(linearLayout, BITMAP_CONFIG); } /** * 通过 LinearLayout 绘制为 Bitmap * <pre> * LinearLayout 容器中不能有诸如 ListView、GridView、WebView 这样的高度可变的控件 * </pre> * @param linearLayout {@link LinearLayout} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByLinearLayout(final LinearLayout linearLayout, final Bitmap.Config config) { return snapshotByView(linearLayout, config); } // =============== // = FrameLayout = // =============== /** * 通过 FrameLayout 绘制为 Bitmap * @param frameLayout {@link FrameLayout} * @return {@link Bitmap} */ public static Bitmap snapshotByFrameLayout(final FrameLayout frameLayout) { return snapshotByFrameLayout(frameLayout, BITMAP_CONFIG); } /** * 通过 FrameLayout 绘制为 Bitmap * <pre> * FrameLayout 容器中不能有诸如 ListView、GridView、WebView 这样的高度可变的控件 * </pre> * @param frameLayout {@link FrameLayout} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByFrameLayout(final FrameLayout frameLayout, final Bitmap.Config config) { return snapshotByView(frameLayout, config); } // ================== // = RelativeLayout = // ================== /** * 通过 RelativeLayout 绘制为 Bitmap * @param relativeLayout {@link RelativeLayout} * @return {@link Bitmap} */ public static Bitmap snapshotByRelativeLayout(final RelativeLayout relativeLayout) { return snapshotByRelativeLayout(relativeLayout, BITMAP_CONFIG); } /** * 通过 RelativeLayout 绘制为 Bitmap * <pre> * RelativeLayout 容器中不能有诸如 ListView、GridView、WebView 这样的高度可变的控件 * </pre> * @param relativeLayout {@link RelativeLayout} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByRelativeLayout(final RelativeLayout relativeLayout, final Bitmap.Config config) { return snapshotByView(relativeLayout, config); } // ============== // = ScrollView = // ============== /** * 通过 ScrollView 绘制为 Bitmap * @param scrollView {@link ScrollView} * @return {@link Bitmap} */ public static Bitmap snapshotByScrollView(final ScrollView scrollView) { return snapshotByScrollView(scrollView, BITMAP_CONFIG); } /** * 通过 ScrollView 绘制为 Bitmap * <pre> * ScrollView 容器中不能有诸如 ListView、GridView、WebView 这样的高度可变的控件 * </pre> * @param scrollView {@link ScrollView} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByScrollView(final ScrollView scrollView, final Bitmap.Config config) { if (scrollView == null || config == null) return null; try { View view = scrollView.getChildAt(0); int width = view.getWidth(); int height = view.getHeight(); Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); scrollView.layout(0, 0, scrollView.getMeasuredWidth(), scrollView.getMeasuredHeight()); scrollView.draw(canvas); return bitmap; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByScrollView"); } return null; } // ======================== // = HorizontalScrollView = // ======================== /** * 通过 HorizontalScrollView 绘制为 Bitmap * @param scrollView {@link HorizontalScrollView} * @return {@link Bitmap} */ public static Bitmap snapshotByHorizontalScrollView(final HorizontalScrollView scrollView) { return snapshotByHorizontalScrollView(scrollView, BITMAP_CONFIG); } /** * 通过 HorizontalScrollView 绘制为 Bitmap * @param scrollView {@link HorizontalScrollView} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByHorizontalScrollView(final HorizontalScrollView scrollView, final Bitmap.Config config) { if (scrollView == null || config == null) return null; try { View view = scrollView.getChildAt(0); int width = view.getWidth(); int height = view.getHeight(); Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); scrollView.layout(0, 0, scrollView.getMeasuredWidth(), scrollView.getMeasuredHeight()); scrollView.draw(canvas); return bitmap; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByHorizontalScrollView"); } return null; } // ==================== // = NestedScrollView = // ==================== /** * 通过 NestedScrollView 绘制为 Bitmap * @param scrollView {@link NestedScrollView} * @return {@link Bitmap} */ public static Bitmap snapshotByNestedScrollView(final NestedScrollView scrollView) { return snapshotByNestedScrollView(scrollView, BITMAP_CONFIG); } /** * 通过 NestedScrollView 绘制为 Bitmap * @param scrollView {@link NestedScrollView} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByNestedScrollView(final NestedScrollView scrollView, final Bitmap.Config config) { if (scrollView == null || config == null) return null; try { View view = scrollView.getChildAt(0); int width = view.getWidth(); int height = view.getHeight(); Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); scrollView.layout(0, 0, scrollView.getMeasuredWidth(), scrollView.getMeasuredHeight()); scrollView.draw(canvas); return bitmap; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByNestedScrollView"); } return null; } // ============ // = ListView = // ============ /** * 通过 ListView 绘制为 Bitmap * @param listView {@link ListView} * @return {@link Bitmap} */ public static Bitmap snapshotByListView(final ListView listView) { return snapshotByListView(listView, BITMAP_CONFIG); } /** * 通过 ListView 绘制为 Bitmap * @param listView {@link ListView} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByListView(final ListView listView, final Bitmap.Config config) { if (listView == null || config == null) return null; try { // Adapter ListAdapter listAdapter = listView.getAdapter(); // Item 总条数 int itemCount = listAdapter.getCount(); // 没数据则直接跳过 if (itemCount == 0) return null; // 高度 int height = 0; // 获取子项间分隔符占用的高度 int dividerHeight = listView.getDividerHeight(); // View Bitmaps Bitmap[] bitmaps = new Bitmap[itemCount]; // 循环绘制每个 Item 并保存 Bitmap for (int i = 0; i < itemCount; i++) { View childView = listAdapter.getView(i, null, listView); measureView(childView, listView.getWidth()); bitmaps[i] = canvasBitmap(childView, config); height += childView.getMeasuredHeight(); } // 追加子项间分隔符占用的高度 height += (dividerHeight * (itemCount - 1)); int width = listView.getMeasuredWidth(); // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); // 累加高度 int appendHeight = 0; for (int i = 0, len = bitmaps.length; i < len; i++) { Bitmap bmp = bitmaps[i]; canvas.drawBitmap(bmp, 0, appendHeight, PAINT); appendHeight += (bmp.getHeight() + dividerHeight); // 释放资源 bmp.recycle(); bmp = null; } return bitmap; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByListView"); } return null; } // ============ // = GridView = // ============ /** * 通过 GridView 绘制为 Bitmap * @param gridView {@link GridView} * @return {@link Bitmap} */ public static Bitmap snapshotByGridView(final GridView gridView) { return snapshotByGridView(gridView, BITMAP_CONFIG, false); } /** * 通过 GridView 绘制为 Bitmap * @param gridView {@link GridView} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByGridView(final GridView gridView, final Bitmap.Config config) { return snapshotByGridView(gridView, config, false); } /** * 通过 GridView 绘制为 Bitmap * @param gridView {@link GridView} * @param config {@link Bitmap.Config} * @param listViewEffect 是否保存 ListView 效果 ( 每个 Item 铺满 ) * @return {@link Bitmap} */ public static Bitmap snapshotByGridView(final GridView gridView, final Bitmap.Config config, final boolean listViewEffect) { if (gridView == null || config == null) return null; if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) return null; try { // Adapter ListAdapter listAdapter = gridView.getAdapter(); // Item 总条数 int itemCount = listAdapter.getCount(); // 没数据则直接跳过 if (itemCount == 0) return null; // 高度 int height = 0; // 获取一共多少列 int numColumns = gridView.getNumColumns(); // 每列之间的间隔 | int horizontalSpacing = gridView.getHorizontalSpacing(); // 每行之间的间隔 - int verticalSpacing = gridView.getVerticalSpacing(); // View Bitmaps Bitmap[] bitmaps = new Bitmap[itemCount]; // 效果处理 - ListView 效果 Item 铺满 if (listViewEffect) { // 循环绘制每个 Item 并保存 Bitmap for (int i = 0; i < itemCount; i++) { View childView = listAdapter.getView(i, null, gridView); measureView(childView, gridView.getWidth()); bitmaps[i] = canvasBitmap(childView, config); height += childView.getMeasuredHeight(); } // 追加子项间分隔符占用的高度 height += (verticalSpacing * (itemCount - 1)); int width = gridView.getMeasuredWidth(); // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); // 累加高度 int appendHeight = 0; for (int i = 0, len = bitmaps.length; i < len; i++) { Bitmap bmp = bitmaps[i]; canvas.drawBitmap(bmp, 0, appendHeight, PAINT); appendHeight += (bmp.getHeight() + verticalSpacing); // 释放资源 bmp.recycle(); bmp = null; } return bitmap; } else { // 获取倍数 ( 行数 ) int lineNumber = getMultiple(itemCount, numColumns); // 计算总共的宽度 - (GridView 宽度 - 列分割间距 ) / numColumns int childWidth = (gridView.getWidth() - (numColumns - 1) * horizontalSpacing) / numColumns; // 记录每行最大高度 int[] rowHeightArrays = new int[lineNumber]; // 临时高度 - 保存行中最高的列高度 int tempHeight; // 循环每一行绘制每个 Item 并保存 Bitmap for (int i = 0; i < lineNumber; i++) { // 清空高度 tempHeight = 0; // 循环列数 for (int j = 0; j < numColumns; j++) { // 获取对应的索引 int position = i * numColumns + j; // 小于总数才处理 if (position < itemCount) { View childView = listAdapter.getView(position, null, gridView); measureView(childView, childWidth); bitmaps[position] = canvasBitmap(childView, config); int itemHeight = childView.getMeasuredHeight(); // 保留最大高度 tempHeight = Math.max(itemHeight, tempHeight); } // 记录高度并累加 if (j == numColumns - 1) { height += tempHeight; rowHeightArrays[i] = tempHeight; } } } // 追加子项间分隔符占用的高度 height += (verticalSpacing * (lineNumber - 1)); int width = gridView.getMeasuredWidth(); // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); // 累加高度 int appendHeight = 0; // 循环每一行绘制每个 Item Bitmap for (int i = 0; i < lineNumber; i++) { // 获取每一行最长列的高度 int itemHeight = rowHeightArrays[i]; // 循环列数 for (int j = 0; j < numColumns; j++) { // 获取对应的索引 int position = i * numColumns + j; // 小于总数才处理 if (position < itemCount) { Bitmap bmp = bitmaps[position]; // 计算边距 int left = j * (horizontalSpacing + childWidth); Matrix matrix = new Matrix(); matrix.postTranslate(left, appendHeight); // 绘制到 Bitmap canvas.drawBitmap(bmp, matrix, PAINT); // 释放资源 bmp.recycle(); bmp = null; } // 记录高度并累加 if (j == numColumns - 1) { appendHeight += itemHeight + verticalSpacing; } } } return bitmap; } } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByGridView"); } return null; } // ================ // = RecyclerView = // ================ /** * 通过 RecyclerView 绘制为 Bitmap * @param recyclerView {@link RecyclerView} * @return {@link Bitmap} */ public static Bitmap snapshotByRecyclerView(final RecyclerView recyclerView) { return snapshotByRecyclerView(recyclerView, BITMAP_CONFIG, 0, 0); } /** * 通过 RecyclerView 绘制为 Bitmap * @param recyclerView {@link RecyclerView} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ public static Bitmap snapshotByRecyclerView(final RecyclerView recyclerView, final Bitmap.Config config) { return snapshotByRecyclerView(recyclerView, config, 0, 0); } /** * 通过 RecyclerView 绘制为 Bitmap * @param recyclerView {@link RecyclerView} * @param spacing 每列之间的间隔 | * @return {@link Bitmap} */ public static Bitmap snapshotByRecyclerView(final RecyclerView recyclerView, final int spacing) { return snapshotByRecyclerView(recyclerView, BITMAP_CONFIG, spacing, spacing); } /** * 通过 RecyclerView 绘制为 Bitmap * @param recyclerView {@link RecyclerView} * @param config {@link Bitmap.Config} * @param spacing 每列之间的间隔 | * @return {@link Bitmap} */ public static Bitmap snapshotByRecyclerView(final RecyclerView recyclerView, final Bitmap.Config config, final int spacing) { return snapshotByRecyclerView(recyclerView, config, spacing, spacing); } /** * 通过 RecyclerView 绘制为 Bitmap * <pre> * 不支持含 ItemDecoration 截图 * 如果数据太多推荐 copy 代码, 修改为保存每个 Item Bitmap 到本地, 并在绘制时获取绘制 * </pre> * @param recyclerView {@link RecyclerView} * @param config {@link Bitmap.Config} * @param verticalSpacing 每行之间的间隔 - * @param horizontalSpacing 每列之间的间隔 | * @return {@link Bitmap} */ public static Bitmap snapshotByRecyclerView(final RecyclerView recyclerView, final Bitmap.Config config, final int verticalSpacing, final int horizontalSpacing) { if (recyclerView == null || config == null) return null; try { // 获取适配器 RecyclerView.Adapter adapter = recyclerView.getAdapter(); // 获取布局管理器 RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager(); if (layoutManager != null && adapter != null) { // 判断布局类型 if (layoutManager instanceof GridLayoutManager) { return snapshotByRecyclerView_GridLayoutManager(recyclerView, config, verticalSpacing, horizontalSpacing); } else if (layoutManager instanceof LinearLayoutManager) { return snapshotByRecyclerView_LinearLayoutManager(recyclerView, config, verticalSpacing, horizontalSpacing); } else if (layoutManager instanceof StaggeredGridLayoutManager) { return snapshotByRecyclerView_StaggeredGridLayoutManager(recyclerView, config, verticalSpacing, horizontalSpacing); } throw new Exception(String.format("Not Supported %s LayoutManager", layoutManager.getClass().getSimpleName())); } else { throw new Exception("Adapter or LayoutManager is Null"); } } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByRecyclerView"); } return null; } // ================= // = LayoutManager = // ================= /** * 通过 RecyclerView GridLayoutManager 绘制为 Bitmap * @param recyclerView {@link RecyclerView} * @param config {@link Bitmap.Config} * @param verticalSpacing 每行之间的间隔 - * @param horizontalSpacing 每列之间的间隔 | * @return {@link Bitmap} */ private static Bitmap snapshotByRecyclerView_GridLayoutManager(final RecyclerView recyclerView, final Bitmap.Config config, final int verticalSpacing, final int horizontalSpacing) { // 计算思路 // = 竖屏 = // 每个 Item 宽度最大值固定为 (RecyclerView 宽度 - ( 列数 - 1) * 每列边距 ) / 列数 // 循环保存每行最大高度, 并累加每行之间的间隔, 用于 Bitmap 高度, 宽度用 RecyclerView 宽度 // = 横屏 = // 循环保存每一行宽度以及每一行 ( 横着一行 ) 最大高度, 并且累加每行、每列之间的间隔 // 用于 Bitmap 高度, 宽度用 ( 每一行宽度累加值 ) 最大值 try { // 获取适配器 RecyclerView.Adapter adapter = recyclerView.getAdapter(); // Item 总条数 int itemCount = adapter.getItemCount(); // 没数据则直接跳过 if (itemCount == 0) return null; // 宽高 int width = 0, height = 0; // View Bitmaps Bitmap[] bitmaps = new Bitmap[itemCount]; // 获取布局管理器 - 判断横竖布局 GridLayoutManager gridLayoutManager = (GridLayoutManager) recyclerView.getLayoutManager(); boolean vertical = (gridLayoutManager.getOrientation() == 1); // 获取一共多少列 int spanCount = gridLayoutManager.getSpanCount(); // 获取倍数 ( 行数 ) int lineNumber = getMultiple(itemCount, spanCount); if (vertical) { // ============ // = 竖向滑动 = // ============ // 计算总共的宽度 - (GridView 宽度 - 列分割间距 ) / spanCount int childWidth = (recyclerView.getWidth() - (spanCount - 1) * horizontalSpacing) / spanCount; // 记录每行最大高度 int[] rowHeightArrays = new int[lineNumber]; // 临时高度 - 保存行中最高的列高度 int tempHeight; for (int i = 0; i < lineNumber; i++) { // 清空高度 tempHeight = 0; // 循环列数 for (int j = 0; j < spanCount; j++) { // 获取对应的索引 int position = i * spanCount + j; // 小于总数才处理 if (position < itemCount) { RecyclerView.ViewHolder holder = adapter.createViewHolder(recyclerView, adapter.getItemViewType(position)); adapter.onBindViewHolder(holder, position); View childView = holder.itemView; measureView(childView, childWidth); bitmaps[position] = canvasBitmap(childView, config); int itemHeight = childView.getMeasuredHeight(); // 保留最大高度 tempHeight = Math.max(itemHeight, tempHeight); } // 记录高度并累加 if (j == spanCount - 1) { height += tempHeight; rowHeightArrays[i] = tempHeight; } } } // 追加子项间分隔符占用的高度 height += (verticalSpacing * (lineNumber - 1)); width = recyclerView.getMeasuredWidth(); // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); // 累加高度 int appendHeight = 0; for (int i = 0; i < lineNumber; i++) { // 获取每行中最高的列高度 int rowHeight = rowHeightArrays[i]; // 循环列数 for (int j = 0; j < spanCount; j++) { // 获取对应的索引 int position = i * spanCount + j; // 小于总数才处理 if (position < itemCount) { Bitmap bmp = bitmaps[position]; // 计算边距 int left = j * (horizontalSpacing + childWidth); Matrix matrix = new Matrix(); matrix.postTranslate(left, appendHeight); // 绘制到 Bitmap canvas.drawBitmap(bmp, matrix, PAINT); // 释放资源 bmp.recycle(); bmp = null; } // 记录高度并累加 if (j == spanCount - 1) { appendHeight += (rowHeight + verticalSpacing); } } } return bitmap; } else { // ============ // = 横向滑动 = // ============ // 获取行数 lineNumber = Math.min(spanCount, itemCount); // 记录每一行宽度 int[] rowWidthArrays = new int[lineNumber]; // 记录每一行高度 int[] rowHeightArrays = new int[lineNumber]; // 获取一共多少列 int numColumns = getMultiple(itemCount, lineNumber); // 临时高度 - 保存行中最高的列高度 int tempHeight; for (int i = 0; i < lineNumber; i++) { // 清空高度 tempHeight = 0; // 循环列数 for (int j = 0; j < numColumns; j++) { // 获取对应的索引 int position = j * lineNumber + i; // 小于总数才处理 if (position < itemCount) { RecyclerView.ViewHolder holder = adapter.createViewHolder(recyclerView, adapter.getItemViewType(position)); adapter.onBindViewHolder(holder, position); View childView = holder.itemView; measureView(childView, 0); bitmaps[position] = canvasBitmap(childView, config); rowWidthArrays[i] += childView.getMeasuredWidth(); int itemHeight = childView.getMeasuredHeight(); // 保留最大高度 tempHeight = Math.max(itemHeight, tempHeight); } // 最后记录处理 if (j == numColumns - 1) { height += tempHeight; width = Math.max(width, rowWidthArrays[i]); rowHeightArrays[i] = tempHeight; } } } // 追加子项间分隔符占用的高、宽 height += (verticalSpacing * (lineNumber - 1)); width += (horizontalSpacing * (numColumns - 1)); // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); // 累加宽、高 int appendWidth = 0, appendHeight = 0; for (int i = 0; i < lineNumber; i++) { // 获取每行中最高的列高度 int rowHeight = rowHeightArrays[i]; // 循环列数 for (int j = 0; j < numColumns; j++) { // 获取对应的索引 int position = j * lineNumber + i; // 小于总数才处理 if (position < itemCount) { Bitmap bmp = bitmaps[position]; // 计算边距 int left = appendWidth + (j * horizontalSpacing); Matrix matrix = new Matrix(); matrix.postTranslate(left, appendHeight); // 绘制到 Bitmap canvas.drawBitmap(bmp, matrix, PAINT); // 累加 Bitmap 宽度 appendWidth += bmp.getWidth(); // 释放资源 bmp.recycle(); bmp = null; } // 记录高度并累加 if (j == numColumns - 1) { appendWidth = 0; appendHeight += (rowHeight + verticalSpacing); } } } return bitmap; } } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByRecyclerView_GridLayoutManager"); } return null; } /** * 通过 RecyclerView LinearLayoutManager 绘制为 Bitmap * @param recyclerView {@link RecyclerView} * @param config {@link Bitmap.Config} * @param verticalSpacing 每行之间的间隔 - * @param horizontalSpacing 每列之间的间隔 | * @return {@link Bitmap} */ private static Bitmap snapshotByRecyclerView_LinearLayoutManager(final RecyclerView recyclerView, final Bitmap.Config config, final int verticalSpacing, final int horizontalSpacing) { // 计算思路 // = 竖屏 = // 循环保存每一个 Item View 高度, 并累加每行之间的间隔, // 用于 Bitmap 高度, 宽度用 RecyclerView 宽度 // = 横屏 = // 循环保存每一个 Item View 宽度, 并累加每列之间的间隔, 且记录最高的列 // 用于 Bitmap 高度, 宽度用累加出来的值 try { // 获取适配器 RecyclerView.Adapter adapter = recyclerView.getAdapter(); // Item 总条数 int itemCount = adapter.getItemCount(); // 没数据则直接跳过 if (itemCount == 0) return null; // 宽高 int width = 0, height = 0; // View Bitmaps Bitmap[] bitmaps = new Bitmap[itemCount]; // 获取布局管理器 - 判断横竖布局 LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager(); boolean vertical = (linearLayoutManager.getOrientation() == 1); if (vertical) { // ============ // = 竖向滑动 = // ============ for (int i = 0; i < itemCount; i++) { RecyclerView.ViewHolder holder = adapter.createViewHolder(recyclerView, adapter.getItemViewType(i)); adapter.onBindViewHolder(holder, i); View childView = holder.itemView; measureView(childView, recyclerView.getWidth()); bitmaps[i] = canvasBitmap(childView, config); height += childView.getMeasuredHeight(); } // 追加子项间分隔符占用的高度 height += (verticalSpacing * (itemCount - 1)); width = recyclerView.getMeasuredWidth(); // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); // 累加高度 int appendHeight = 0; for (int i = 0; i < itemCount; i++) { Bitmap bmp = bitmaps[i]; canvas.drawBitmap(bmp, 0, appendHeight, PAINT); appendHeight += (bmp.getHeight() + verticalSpacing); // 释放资源 bmp.recycle(); bmp = null; } return bitmap; } else { // ============ // = 横向滑动 = // ============ // 临时高度 - 保存行中最高的列高度 int tempHeight = 0; for (int i = 0; i < itemCount; i++) { RecyclerView.ViewHolder holder = adapter.createViewHolder(recyclerView, adapter.getItemViewType(i)); adapter.onBindViewHolder(holder, i); View childView = holder.itemView; measureView(childView, 0); bitmaps[i] = canvasBitmap(childView, config); width += childView.getMeasuredWidth(); int itemHeight = childView.getMeasuredHeight(); // 保留最大高度 tempHeight = Math.max(itemHeight, tempHeight); } // 追加子项间分隔符占用的宽度 width += (horizontalSpacing * (itemCount - 1)); height = tempHeight; // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); // 累加宽度 int appendWidth = 0; for (int i = 0; i < itemCount; i++) { Bitmap bmp = bitmaps[i]; canvas.drawBitmap(bmp, appendWidth, 0, PAINT); appendWidth += (bmp.getWidth() + horizontalSpacing); // 释放资源 bmp.recycle(); bmp = null; } return bitmap; } } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByRecyclerView_LinearLayoutManager"); } return null; } /** * 通过 RecyclerView StaggeredGridLayoutManager 绘制为 Bitmap * @param recyclerView {@link RecyclerView} * @param config {@link Bitmap.Config} * @param verticalSpacing 每行之间的间隔 - * @param horizontalSpacing 每列之间的间隔 | * @return {@link Bitmap} */ private static Bitmap snapshotByRecyclerView_StaggeredGridLayoutManager(final RecyclerView recyclerView, final Bitmap.Config config, final int verticalSpacing, final int horizontalSpacing) { // 计算思路 // = 竖屏 = // 每个 Item 宽度最大值固定为 (RecyclerView 宽度 - ( 列数 - 1) * 每列边距 ) / 列数 // 循环保存每一个 Item View 高度, 并创建数组记录每一列待绘制高度, 实现瀑布流高度补差 // 并通过该数组 ( 每列待绘制高度数组 ) 获取最大值, 用做 Bitmap 高度, 绘制则还是按以上规则高度补差累加 // = 横屏 = // 循环保存每一个 Item View 宽度、高度, 并创建数组记录每一列待绘制宽度, 实现瀑布流高度补差 // 并通过该数组 ( 每列待绘制宽度数组 ) 获取最大值, 用做 Bitmap 高度, 绘制则还是按以上规则宽度补差累加 try { // 获取适配器 RecyclerView.Adapter adapter = recyclerView.getAdapter(); // Item 总条数 int itemCount = adapter.getItemCount(); // 没数据则直接跳过 if (itemCount == 0) return null; // 宽高 int width = 0, height = 0; // View Bitmaps Bitmap[] bitmaps = new Bitmap[itemCount]; // 获取布局管理器 - 判断横竖布局 StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) recyclerView.getLayoutManager(); boolean vertical = (staggeredGridLayoutManager.getOrientation() == 1); // 获取一共多少列 int spanCount = staggeredGridLayoutManager.getSpanCount(); // 获取倍数 ( 行数 ) int lineNumber = getMultiple(itemCount, spanCount); if (vertical) { // ============ // = 竖向滑动 = // ============ // 计算总共的宽度 - (GridView 宽度 - 列分割间距 ) / spanCount int childWidth = (recyclerView.getWidth() - (spanCount - 1) * horizontalSpacing) / spanCount; // 记录每个 Item 高度 int[] itemHeightArrays = new int[itemCount]; for (int i = 0; i < itemCount; i++) { RecyclerView.ViewHolder holder = adapter.createViewHolder(recyclerView, adapter.getItemViewType(i)); adapter.onBindViewHolder(holder, i); View childView = holder.itemView; measureView(childView, childWidth); bitmaps[i] = canvasBitmap(childView, config); itemHeightArrays[i] = childView.getMeasuredHeight(); } // 记录每列 Item 个数 int[] columnsItemNumberArrays = new int[spanCount]; // 记录每列总高度 int[] columnsHeightArrays = new int[spanCount]; // 循环高度, 计算绘制位置 for (int i = 0; i < itemCount; i++) { // 获取最小高度索引 int minIndex = getMinimumIndex(columnsHeightArrays); // 累加高度 columnsHeightArrays[minIndex] += itemHeightArrays[i]; // 累加数量 columnsItemNumberArrays[minIndex] += 1; } // 计算高度 - 追加子项间分隔符占用的高度 if (lineNumber >= 2) { // 循环追加子项间分隔符占用的高度 for (int i = 0; i < spanCount; i++) { columnsHeightArrays[i] += (columnsItemNumberArrays[i] - 1) * verticalSpacing; } } // 获取列最大高度索引 int columnsHeightMaxIndex = getMaximumIndex(columnsHeightArrays); // 获取最大高度值 int maxColumnsHeight = columnsHeightArrays[columnsHeightMaxIndex]; // 使用最大值 height = maxColumnsHeight; width = recyclerView.getMeasuredWidth(); // 清空绘制时累加计算 columnsHeightArrays = new int[spanCount]; // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); // 循环绘制 for (int i = 0; i < itemCount; i++) { // 获取最小高度索引 int minIndex = getMinimumIndex(columnsHeightArrays); // 计算边距 int left = minIndex * (horizontalSpacing + childWidth); Matrix matrix = new Matrix(); matrix.postTranslate(left, columnsHeightArrays[minIndex]); // 绘制到 Bitmap Bitmap bmp = bitmaps[i]; canvas.drawBitmap(bmp, matrix, PAINT); // 累加高度 columnsHeightArrays[minIndex] += (itemHeightArrays[i] + verticalSpacing); // 释放资源 bmp.recycle(); bmp = null; } return bitmap; } else { // ============ // = 横向滑动 = // ============ // 获取行数 lineNumber = Math.min(spanCount, itemCount); // 记录每个 Item 宽度 int[] itemWidthArrays = new int[itemCount]; // 记录每个 Item 高度 int[] itemHeightArrays = new int[itemCount]; for (int i = 0; i < itemCount; i++) { RecyclerView.ViewHolder holder = adapter.createViewHolder(recyclerView, adapter.getItemViewType(i)); adapter.onBindViewHolder(holder, i); View childView = holder.itemView; measureView(childView, 0); bitmaps[i] = canvasBitmap(childView, config); itemWidthArrays[i] = childView.getMeasuredWidth(); itemHeightArrays[i] = childView.getMeasuredHeight(); } // 记录每行向上距离 int[] columnsTopArrays = new int[lineNumber]; // 记录每行 Item 个数 int[] columnsItemNumberArrays = new int[lineNumber]; // 记录每行总宽度 int[] columnsWidthArrays = new int[lineNumber]; // 记录每行最大高度 int[] columnsHeightArrays = new int[lineNumber]; // 循环宽度, 计算绘制位置 for (int i = 0; i < itemCount; i++) { // 获取最小宽度索引 int minIndex = getMinimumIndex(columnsWidthArrays); // 累加宽度 columnsWidthArrays[minIndex] += itemWidthArrays[i]; // 累加数量 columnsItemNumberArrays[minIndex] += 1; // 保存每行最大高度 columnsHeightArrays[minIndex] = Math.max(itemHeightArrays[i], columnsHeightArrays[minIndex]); } // 循环追加子项间分隔符占用的宽度 for (int i = 0; i < lineNumber; i++) { if (columnsItemNumberArrays[i] > 1) { columnsWidthArrays[i] += (columnsItemNumberArrays[i] - 1) * horizontalSpacing; } if (i > 0) { columnsTopArrays[i] = height + (i * verticalSpacing); } // 累加每行高度 height += columnsHeightArrays[i]; } // 获取最大宽值 int maxColumnsWidth = columnsWidthArrays[getMaximumIndex(columnsWidthArrays)]; // 使用最大值 height += (lineNumber - 1) * verticalSpacing; width = maxColumnsWidth; // 清空绘制时累加计算 columnsWidthArrays = new int[lineNumber]; // 创建位图 Bitmap bitmap = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); // 循环绘制 for (int i = 0; i < itemCount; i++) { // 获取最小宽度索引 int minIndex = getMinimumIndex(columnsWidthArrays); Matrix matrix = new Matrix(); matrix.postTranslate(columnsWidthArrays[minIndex], columnsTopArrays[minIndex]); // 绘制到 Bitmap Bitmap bmp = bitmaps[i]; canvas.drawBitmap(bmp, matrix, PAINT); // 累加宽度 columnsWidthArrays[minIndex] += (itemWidthArrays[i] + horizontalSpacing); // 释放资源 bmp.recycle(); bmp = null; } return bitmap; } } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "snapshotByRecyclerView_StaggeredGridLayoutManager"); } return null; } // ================ // = 内部私有方法 = // ================ /** * 绘制 Bitmap * @param childView {@link View} * @param config {@link Bitmap.Config} * @return {@link Bitmap} */ private static Bitmap canvasBitmap(final View childView, final Bitmap.Config config) { Bitmap bitmap = Bitmap.createBitmap(childView.getMeasuredWidth(), childView.getMeasuredHeight(), config); Canvas canvas = new Canvas(bitmap); canvas.drawColor(BACKGROUND_COLOR); childView.draw(canvas); return bitmap; } // ====================== // = 其他工具类实现代码 = // ====================== // =============== // = ScreenUtils = // =============== /** * 获取屏幕宽高 * @return int[], 0 = 宽度, 1 = 高度 */ private static int[] getScreenWidthHeight() { try { WindowManager windowManager = (WindowManager) DevUtils.getContext().getSystemService(Context.WINDOW_SERVICE); if (windowManager == null) { DisplayMetrics displayMetrics = DevUtils.getContext().getResources().getDisplayMetrics(); return new int[]{displayMetrics.widthPixels, displayMetrics.heightPixels}; } Point point = new Point(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { windowManager.getDefaultDisplay().getRealSize(point); } else { windowManager.getDefaultDisplay().getSize(point); } return new int[]{point.x, point.y}; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "getScreenWidthHeight"); } return new int[]{0, 0}; } /** * 获取应用区域 TitleBar 高度 ( 顶部灰色 TitleBar 高度, 没有设置 android:theme 的 NoTitleBar 时会显示 ) * @param activity {@link Activity} * @return 应用区域 TitleBar 高度 */ private static int getStatusBarHeight(final Activity activity) { try { Rect rect = new Rect(); activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect); return rect.top; } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "getStatusBarHeight"); } return 0; } // =============== // = NumberUtils = // =============== /** * 获取倍数 ( 自动补 1) * @param value 被除数 * @param divisor 除数 * @return 倍数 */ private static int getMultiple(final int value, final int divisor) { if (value <= 0 || divisor <= 0) return 0; if (value <= divisor) return 1; return (value % divisor == 0) ? (value / divisor) : (value / divisor) + 1; } // ============== // = ArrayUtils = // ============== /** * 获取数组中最小值索引 * @param data 数组 * @return 最小值索引 */ private static int getMinimumIndex(final int[] data) { if (data != null) { int len = data.length; if (len > 0) { int index = 0; int temp = data[index]; for (int i = 1; i < len; i++) { int value = data[i]; if (value < temp) { index = i; temp = value; } } return index; } } return -1; } /** * 获取数组中最大值索引 * @param data 数组 * @return 最大值索引 */ private static int getMaximumIndex(final int[] data) { if (data != null) { int len = data.length; if (len > 0) { int index = 0; int temp = data[index]; for (int i = 1; i < len; i++) { int value = data[i]; if (value > temp) { index = i; temp = value; } } return index; } } return -1; } // ============= // = ViewUtils = // ============= /** * 测量 View * @param view {@link View} * @param specifiedWidth 指定宽度 */ private static void measureView(final View view, final int specifiedWidth) { measureView(view, specifiedWidth, 0); } /** * 测量 View * @param view {@link View} * @param specifiedWidth 指定宽度 * @param specifiedHeight 指定高度 */ private static void measureView(final View view, final int specifiedWidth, final int specifiedHeight) { try { ViewGroup.LayoutParams layoutParams = view.getLayoutParams(); // MeasureSpec int widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); int heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); // 如果大于 0 if (specifiedWidth > 0) { widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(specifiedWidth, View.MeasureSpec.EXACTLY); } // 如果大于 0 if (specifiedHeight > 0) { heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(specifiedHeight, View.MeasureSpec.EXACTLY); } // 判断是否存在自定义宽高 if (layoutParams != null) { int width = layoutParams.width; int height = layoutParams.height; if (width > 0 && height > 0) { widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY); heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(height, View.MeasureSpec.EXACTLY); } else if (width > 0) { widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY); } else if (height > 0) { heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(height, View.MeasureSpec.EXACTLY); } } view.measure(widthMeasureSpec, heightMeasureSpec); view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight()); } catch (Exception e) { LogPrintUtils.eTag(TAG, e, "measureView"); } } }