Android开发之子线程操作UI的几种方法

runOnUiThread(new Runnable() { 
@Override 
public void run() { 
tv.setText("Hello"); 
} 
}); 

Handler mHandler = new Handler() { 
@Override 
public void handleMessage(Message msg) { 
super.handleMessage(msg); 
switch (msg.what) { 
case 0: 
String data = (String)msg.obj; 
textView.setText(data); 
break; 
default: 
break; 
} 
} 
}; 

new Thread(new Runnable(){ 
@Override 
public void run() { 
//耗时操作 
mHandler.sendEmptyMessage(0); 
Message msg =new Message(); 
msg.obj = "数据";//可以是基本类型，可以是对象，可以是List、map等 
mHandler.sendMessage(msg); 
} 
}).start(); 

final Button btn =(Button)findViewById(R.id.btn); 
btn.post(new Runnable(){ 
@Override 
publicvoid run() { 
btn.setText("Hello"); 
} 
}); 

Handler handler = new Handler(); 
final Button btn = (Button)findViewById(R.id.btn); 
handler.post(new Runnable(){ 
@Override 
public void run() { 
btn.setText("Hello"); 
} 
}); 

public boolean post(Runnable action) { 
Handler handler; 
AttachInfo attachInfo = mAttachInfo; 
if (attachInfo != null) { 
handler = attachInfo.mHandler; 
} else { 
// Assume that post will succeed later 
ViewRootImpl.getRunQueue().post(action); 
return true; 
} 
return handler.post(action); 
}