Android使用线程获取网络图片的方法

本文为大家分享了Android使用线程获取网络图片的具体代码，供大家参考，具体内容如下

AndroidManifest.xml   

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.zdcrobot.handlermessage">
 <uses-permission android:name="android.permission.INTERNET"></uses-permission>
 <application
   android:allowBackup="true"
   android:icon="@mipmap/ic_launcher"
   android:label="@string/app_name"
   android:supportsRtl="true"
   android:theme="@style/AppTheme">
   <activity
     android:name=".MainActivity"
     android:label="@string/app_name"
     android:theme="@style/AppTheme.NoActionBar">
     <intent-filter>
       <action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
     </intent-filter>
   </activity>
 </application>

</manifest>

activity_main.xml   

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:fitsSystemWindows="true"
 tools:context="com.zdcrobot.handlermessage.MainActivity">

<LinearLayout
   android:orientation="vertical"
   android:layout_width="match_parent"
   android:layout_height="match_parent">
   <Button
     android:id="@+id/button1"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:text="加载图片"/>
   <ImageView
     android:id="@+id/image1"
     android:layout_width="match_parent"
     android:layout_height="500dp" />
 </LinearLayout>

</android.support.design.widget.CoordinatorLayout>

MainActivity.class   

package com.zdcrobot.handlermessage;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class MainActivity extends AppCompatActivity {
 private Button button;
 private ImageView imageView;
 private String imagPath = "http://pica.nipic.com/2007-11-09/200711912453162_2.jpg";
 private final int IS_FINISH = 1;
 private Handler handler = new Handler(){
   @Override
   public void handleMessage(Message msg) {
     Bitmap bitmap = (Bitmap)msg.obj;
     imageView.setImageBitmap(bitmap);
   }
 };
 @Override
 protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   button = (Button)findViewById(R.id.button1);
   imageView = (ImageView)findViewById(R.id.image1);
   button.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View v) {
       new Thread(new MyClass()).start();
     }
   });
 }

public class MyClass implements Runnable{

@Override
   public void run() {
     Bitmap bitmap = null;
     try {
       URL url = new URL(imagPath);
       HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
       httpURLConnection.setDoInput(true);
       httpURLConnection.connect();
       InputStream inputStream = httpURLConnection.getInputStream();
       bitmap = BitmapFactory.decodeStream(inputStream);
     } catch (MalformedURLException e) {
       e.printStackTrace();
     } catch (IOException e) {
       e.printStackTrace();
     }
     Message message = Message.obtain();
     message.obj = bitmap;
     message.what = IS_FINISH;
     handler.sendMessage(message);
   }
 }
}