Android: 如何检测phone 处于活动状态和空闲状态?

Android: How to detect when phone is active and idle?

我想创建一个应用程序,它会知道用户何时使用 phone(启动屏幕和关闭屏幕)。一段时间后我需要调用 doSomething() 方法。

问题:

1.How 我可以知道用户何时开始使用 phone 以及何时关闭屏幕吗?

2.Should我用Service还是IntentService?我的情况哪个更好?

您可以使用 BroadcastReceiver 和服务来尝试这样的事情:

您的 class 使用 BroadcastReceiver:

  public class ScreenReceiver extends BroadcastReceiver {

        private boolean screenOff;

        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF))    {
                screenOff = true;
            } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
                screenOff = false;
            }
            Intent i = new Intent(context, UpdateService.class);
            i.putExtra("screen_state", screenOff);
            context.startService(i);
        }

    }

和服务:

    public static class ScreenService extends Service {

        @Override
        public void onCreate() {
            super.onCreate();
            IntentFilter filter = new     IntentFilter(Intent.ACTION_SCREEN_ON);
            filter.addAction(Intent.ACTION_SCREEN_OFF);
            BroadcastReceiver mReceiver = new ScreenReceiver();
            registerReceiver(mReceiver, filter);
        }

        @Override
        public void onStart(Intent intent, int startId) {
            boolean screenOn = intent.getBooleanExtra("screen_state", false);
            if (!screenOn) {
                //Implement here your code
            } else {
                //Implement here your code
            }
        }
    }