Android进阶2之Http访问网络资源（获取网络图片）

package xiaosi.https;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import android.app.Activity;import android.app.ProgressDialog;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;public class HttpActivity extends Activity {private Button button = null;private ImageView image = null;private ProgressDialogdialog= null;     @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        init();    }    private void init(){    button = (Button)findViewById(R.id.button);    button.setOnClickListener(new buttonListener());    image = (ImageView)findViewById(R.id.image);    dialog = new ProgressDialog(HttpActivity.this);dialog.setMessage("正在加载中...");    }    private class buttonListener implements OnClickListener{@Overridepublic void onClick(View v){try{if (!dialog.isShowing()){dialog.show();}image.setImageBitmap(httpsGetBitmap());if (dialog.isShowing()){dialog.dismiss();}}catch (Exception e){e.printStackTrace();}}    }    private Bitmap httpsGetBitmap() throws Exception{    URL url = new URL("http://srimg1.meimei22.com/pic/suren/2012-3-26/1/1.jpg");HttpURLConnection connection = (HttpURLConnection) url.openConnection();// 设置是否从httpUrlConnection读入，默认情况下是true;  connection.setDoInput(true);InputStream inputSream = connection.getInputStream();Bitmap bitmap = BitmapFactory.decodeStream(inputSream);inputSream.close();    return bitmap;    }}