Android 网络编程--URL互联网资源

<RelativeLayout 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" >

<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</RelativeLayout>

public class MainActivity extends Activity {

private Bitmap bitmap;
private ImageView show;

private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 1) {
show.setImageBitmap(bitmap);
}
}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
show = (ImageView) this.findViewById(R.id.imageView);

new Thread() {

@Override
public void run() {
super.run();
try {
URL url = new URL(
"http://a.hiphotos.baidu.com/image/h%3D220/sign=bd9eb2ea07087bf462ec50ebc2d2575e/d439b6003af33a87495b8dbbc35c10385343b559.jpg");
InputStream inputStream = url.openStream();
bitmap = BitmapFactory.decodeStream(inputStream);
handler.sendEmptyMessage(1);
inputStream.close();

} catch (Exception e) {
e.printStackTrace();
}

};

}.start();
}

}