上面一個編輯框輸入要倒計時的數字
獲取以後顯示在下面的textview上面
點擊開始,textview上的數字逐減
private TextView tvTime;
private EditText inputTv;
private Button btnHQ,btnBG,btnZT;
//用來存放倒計時的數字
private int i;
private Timer timer;
private TimerTask task;
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
String time = inputTv.getText().toString();
tvTime.setText(time);
i = Integer.parseInt(time);
break;
case R.id.button2:
start();
break;
case R.id.button3:
timer.cancel();
break;
}
}
Handler mHandler = new Handler(){
public void handleMessage(android.os.Message msg) {
tvTime.setText(msg.arg1+"");
//等於零的時候不在自減
if(msg.arg1==0){
timer.cancel();
}else{
start();
}
};
};
private void start() {
timer = new Timer();
task = new TimerTask() {
@Override
public void run() {
i--;
Message msg = mHandler.obtainMessage();
//將i放入msg裏面
msg.arg1 = i;
mHandler.sendMessage(msg);
}
};
//一定要記得部署這個方法
timer.schedule(task, 1000);
}