我的Android最佳实践之—— Android更新UI的两种方法:handler与runOnUiThread()

public class MainActivity extends Activity {  
    private EditText UITxt;  
    private Button updateUIBtn;  
    private UIHandler UIhandler;  
   
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
        UITxt = (EditText)findViewById(R.id.ui_txt);  
        updateUIBtn = (Button)findViewById(R.id.update_ui_btn);  
        updateUIBtn.setOnClickListener(new View.OnClickListener() {  
               
            public void onClick(View v) {  
                // TODO Auto-generated method stub  
                UIhandler = new UIHandler();  
                UIThread thread = new UIThread();  
                thread.start();  
            }  
        });  
    }  
   
    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        getMenuInflater().inflate(R.menu.activity_main, menu);  
        return true;  
    }  
    private class UIHandler extends Handler{  
        @Override  
        public void handleMessage(Message msg) {  
            // TODO Auto-generated method stub  
            super.handleMessage(msg);  
            Bundle bundle = msg.getData();  
            String color = bundle.getString("color");  
            UITxt.setText(color);  
        }  
    }  
    private class UIThread extends Thread{  
        @Override  
        public void run() {  
            try {  
                Thread.sleep(3000);  
            } catch (InterruptedException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            }  
            Message msg = new Message();  
            Bundle bundle = new Bundle();  
            bundle.putString("color", "黄色");  
            msg.setData(bundle);  
            MainActivity.this.UIhandler.sendMessage(msg);  
               
        }  
    }  
}