Android顯示網絡圖片

這個小例子包含知識點：

1.Thread的使用

2.使用Handle發送數據

3.獲取網絡圖片並顯示

先上代碼

package com.example.getwebimage;

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

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Menu;
import android.widget.ImageView;

public class MainActivity extends Activity {
	
	private ImageView mImageView1;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		mImageView1=(ImageView)findViewById(R.id.imageview1);
		
		final Handler handler=new Handler()
		{
			@Override
			public void handleMessage(Message msg)
			{
				if (msg.what==1) {
					Bitmap bitmap2=(Bitmap)msg.obj;
					mImageView1.setImageBitmap(bitmap2);
				}
			}
		};
		
		new Thread()
		{
			public void run()
			{
				Bitmap bitmap1=getBitMap("http://www.playforum.cn/wp-content/uploads/2013/12/1F0454024-1.png");
				Message msg=new Message();
				msg.what=1;
				msg.obj=bitmap1;
				handler.sendMessage(msg);
				
			}
		}.start();
	}
	
	//????????
	public Bitmap getBitMap(String url)
	{
		Bitmap bitmap=null;
		URL picUrl=null;
		try {
			picUrl=new URL(url);
		} catch (MalformedURLException e) {
			// TODO: handle exception
			e.printStackTrace();
		}
		
		try {
			HttpURLConnection connection=(HttpURLConnection)picUrl.openConnection();
			connection.setDoInput(true);
			connection.connect();
			InputStream inputStream=connection.getInputStream();
			bitmap=BitmapFactory.decodeStream(inputStream);
			inputStream.close();
		} catch (IOException e) {
			// TODO: handle exception
			e.printStackTrace();
		}

		return bitmap;
		
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	
	

}

Layout

這個下過來的圖片是史上最坑爹游戲攻略，大家應該都玩過這個游戲吧。。