package com.example.wang.testapp2;
import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class TestActivity3
extends Activity {
Button bt_1;
Button bt_2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test3);
bt_1=
(Button)findViewById(R.id.bt_1);
bt_2=
(Button)findViewById(R.id.bt_2);
//给组件添加上下文菜单 Activity是OnCreateContextMenuListener的实现类
bt_2.setOnCreateContextMenuListener(
this
);
//添加长按监听器
// bt_2.setOnLongClickListener(new View.OnLongClickListener() {
// @Override
// public boolean onLongClick(View v) {
//
// Toast.makeText(TestActivity3.this, "按钮被长按了", Toast.LENGTH_SHORT).show();
//
// return true;//为true时后面不会再被处理
// }
// });
bt_1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(TestActivity3.this, "按钮被点击了"
, Toast.LENGTH_SHORT).show();
}
});
bt_1.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
Toast.makeText(TestActivity3.this, "按钮被常按了"
, Toast.LENGTH_SHORT).show();
//事件是否已经被消费,如果下列返回false，程序会继续执行点击事件
return true;
}
});
}
//给Activity 添加选项菜单
//重写一个回调方法
@Override
public boolean onCreateOptionsMenu(Menu menu) {
//加载菜单文件方式1
//添加菜单,纯编码方式
// menu.add(1,1,0,"添加");
// menu.add(1,2,2,"修改");
// menu.add(1,3,1,"删除");
//加载菜单文件方式2
//1-获得菜单加载器
MenuInflater m=
getMenuInflater();
//2-加载菜单文件 m.inflate(菜单文件 ,当前菜单);
m.inflate(R.menu.test3_menu,menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Toast.makeText(TestActivity3.this, "菜单项的id="+
item.getItemId()+"菜单项的title="+
item.getTitle(), Toast.LENGTH_SHORT).show();
//怎么判断菜单文件里的菜单哪个被选中了
if(item.getItemId()==
R.id.me_1)
{
Toast.makeText(TestActivity3.this, "执行删除动作"
, Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(TestActivity3.this, "执行修改动作"
, Toast.LENGTH_SHORT).show();
}
return super.onOptionsItemSelected(item);
}
//重写创建上下文菜单的方法
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
//java
menu.add(1, 0, 1, "字体大小"
);
menu.add(1, 1, 2, "背景颜色"
);
//添加子菜单
SubMenu sm=menu.addSubMenu(1, 2, 3, "子菜单"
);
sm.add(2,21,0,"子菜单1"
);
sm.add(2,22,1,"子菜单2"
);
//加载文件
MenuInflater m=
getMenuInflater();
m.inflate(R.menu.test3_menu,menu);
}
//上下文菜单被点击
@Override
public boolean onContextItemSelected(MenuItem item) {
Toast.makeText(TestActivity3.this, "上下文菜单的标题"+
item.getTitle(), Toast.LENGTH_SHORT).show();
return super.onContextItemSelected(item);
}
}
TestActivity3
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.wang.testapp2.TestActivity3"
android:orientation="vertical">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="拨打电话"
android:id="@+id/bt_1"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="上下文菜单按钮"
android:id="@+id/bt_2"/>
</LinearLayout>
activity_test3
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/me_1" android:title="删除"/>
<item android:id="@+id/me_2" android:title="修改"/>
</menu>
test3_menu
转载于:https://www.cnblogs.com/wangchuanqi/p/5475880.html
