Android进阶2之Https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 HttpsActivity extends Activity {
	private Button button = null;
	private ImageView image = null;
	private ProgressDialog	dialog	= 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(HttpsActivity.this);
		dialog.setMessage("正在加载中...");
    }
    private class buttonListener implements OnClickListener{

		@Override
		public 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;
    }
}