Android 仿微信“正在输入...”效果快速实现

private int indexText = 0;
private TextView textView;
private String[] inputStr = {"正在输入","正在输入.","正在输入..","正在输入..."};

private Handler mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case 0:
textView.setText(inputStr[indexText % inputStr.length]);
break;
default:
break;
}
}
};

public TimerTask timerInput = new TimerTask() {
@Override
public void run() {
Message message = new Message();
message.what = 0;
indexText ++;
mHandler.sendMessage(message);

}
};

Timer timer = new Timer();
timer.schedule(timerInput, 0,500);