Android中Handler小例子

public class HandlerActivity extends Activity {
public static final int HANDLER_MESSAGE = 1;
private TextView mContentTv;
@SuppressLint("HandlerLeak")
private Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case HANDLER_MESSAGE:
mContentTv.setText("此时更新了数据");
break;
}
};
};
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContentTv=(TextView) findViewById(R.id.t_title);
}
class myThread implements Runnable {
public void run() {
while (!Thread.currentThread().isInterrupted()) {
Message message = new Message();
message.what = HANDLER_MESSAGE;
mHandler.sendMessage(message);
try {
Thread.sleep(100);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
}
}
}

public class HandlerActivity extends Activity {
private TextView mContentTv;
private Handler handler = new Handler();
private int mCounter = 0;
private Runnable mRunnable = new Runnable() {
public void run() {
handler.postDelayed(this,5000);// 5秒后操作
mCounter++;
mContentTv.setText("Count: " + mCounter);


}
};


@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContentTv = (TextView) findViewById(R.id.t_title);
handler.post(mRunnable);
}
}