package com.example.wang.testapp3;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class TestActivity3
extends AppCompatActivity {
EditText et_2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test3);
et_2=
(EditText)findViewById(R.id.et_2);
}
//JDK的Get方式
public void bt1_OnClick(View v)
{
//1.进度对话框
final ProgressDialog progressDialog = ProgressDialog.show(
this,
null, "正在加载，请稍候..."
);
//2.开启子线程，访问网络
new Thread(){
public void run()
{
try {
// 1 - URL
URL url =
new URL("http://www.baidu.com"
);
// 2- URL获取连接
HttpURLConnection huc =
(HttpURLConnection)url.openConnection();
//请求方式
huc.setRequestMethod("GET"
);
//设置超时
huc.setConnectTimeout(3000
);
huc.setReadTimeout(3000
);
//连接并发送请求
huc.connect();
//接收：
// 判断返回状态码 200
int code =
huc.getResponseCode();
if (code == 200
) {
// 接收数据
// 输入流：
InputStream is =
huc.getInputStream();
//读取流
//1-byte数组
byte[] b =
new byte[1024
];
//2-读到数组的长度
int i = 0
;
//3-数据
final StringBuilder sb1 =
new StringBuilder();
while((i = is.read(b)) > 0
)
{
sb1.append(new String(b, 0
, i));
}
// 释放资源
is.close();
huc.disconnect();
// 通过主线程显示信息和关闭对话框
runOnUiThread(new Runnable() {
@Override
public void run() {
et_2.setText(sb1);
progressDialog.dismiss();
Log.e("TAG", "连接错误11"
);
}
}
);
}
else
{
Toast.makeText(TestActivity3.this, "连接错误，返回的状态码 = " +
code, Toast.LENGTH_SHORT).show();
Log.e("TAG","连接错误"
);
}
}
catch (Exception e)
{
e.printStackTrace();
progressDialog.dismiss();
}
}
}.start();
}
}
java
<?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.testapp3.TestActivity3"
android:orientation="vertical">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="JDK-Get方式"
android:onClick="bt1_OnClick"/>
<EditText
android:layout_width="match_parent"
android:layout_height="200dp"
android:id="@+id/et_2"/>
</LinearLayout>
xml
转载于:https://www.cnblogs.com/wangchuanqi/p/5579072.html
