Question

我正在开发一个应用程序，它会在收到＆＃34; ACTION_SCREEN_ON＆＃34;后启动countDownTimer。我有以下工作代码。我只是想在指示的位置实现倒数计时器代码。

package com.example.myapp;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class Receiver extends BroadcastReceiver {
    public static final String TAG = "Receiver Tutorial";
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action != null && Intent.ACTION_SCREEN_ON.equals(action)) {
            Toast.makeText(context, "Screen is turned ON", Toast.LENGTH_LONG).show();
            // Place for CountDown Timer Code
        }
    }
}

以下是我从Android Developers Page获得的CountDownTimer代码。

new CountDownTimer(30000, 1000) {

     public void onTick(long millisUntilFinished) {
         mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
     }

     public void onFinish() {
         mTextField.setText("done!");
     }
  }.start();

但我不知道如何在第一段代码中实现它。

Answer 1

尝试以下方式，

public class Receiver extends BroadcastReceiver 
{
    public static final String TAG = "Receiver Tutorial";
    private CountDownTimer countDownTimer;
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();

    countDownTimer = new CountDownTimer(30000, 1000) {

        public void onTick(long millisUntilFinished) {

        }

        public void onFinish() {

        }
    };    

        if (action != null && Intent.ACTION_SCREEN_ON.equals(action)) {
            Toast.makeText(context, "Screen is turned ON", Toast.LENGTH_LONG).show();
            countDownTimer.start();
        }
    }
}

Answer 2

public class Receiver extends BroadcastReceiver {
    public static final String TAG = "Receiver Tutorial";
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action != null && Intent.ACTION_SCREEN_ON.equals(action)) {
            Toast.makeText(context, "Screen is turned ON", Toast.LENGTH_LONG).show();

new CountDownTimer(30000, 1000) {

     public void onTick(long millisUntilFinished) {
         mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
     }

     public void onFinish() {
         mTextField.setText("done!");

       }
      }.start();
            }
        }
    }

需要CountDownTimer代码

2 个答案: