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  • Handler

    不想多说

       private Button btn;
     private ImageView image;
     private ProgressDialog dialog;
     private static int FINSH=1;
     private Handler handler=new Handler(){
      public void handleMessage(android.os.Message msg) {
       if(msg.what==FINSH){
        dialog.dismiss();
       }
       byte[] data=(byte[])msg.obj;
       Bitmap bitmap=BitmapFactory.decodeByteArray(data, 0, data.length);
       image.setImageBitmap(bitmap);
      };
     };
     @Override
     protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      dialog=new ProgressDialog(this);
      dialog.setMessage("load.....");
      btn=(Button) findViewById(R.id.button1);
      image=(ImageView) findViewById(R.id.imageView1);
      btn.setOnClickListener(new OnClickListener() {
       
       @Override
       public void onClick(View v) {
        // TODO Auto-generated method stub
        new Thread(new Down()).start();
        dialog.show();
       }
      });
     }
     
     public class Down implements Runnable{
      private String path="http://www.baidu.com/img/315-270_e9a7cf5b20f0b58d37dcbe8b9b170713.gif";
      @Override
      public void run() {
       // TODO Auto-generated method stub
       HttpClient client=new DefaultHttpClient();
       HttpPost post=new HttpPost(path);
       try {
        HttpResponse response=client.execute(post);
        if(response.getStatusLine().getStatusCode()==200){
         byte[] bs=EntityUtils.toByteArray(response.getEntity());
         Message message=Message.obtain();
         message.obj=bs;
         message.what=FINSH;
         handler.sendMessage(message);
        }
       } catch (Exception e) {
        // TODO: handle exception
       }finally{
        client.getConnectionManager().shutdown();
       }
       
      }
      }

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  • 原文地址:https://www.cnblogs.com/lk119/p/3602286.html
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