如何在启动时启动广播接收器

Question

我有一个应用程序，每天 10 点启动，一切正常。但是当设备重新启动 BroadcastReceiver 由于应用程序终止而不起作用时，我会在启动时启动应用程序。当我将其设置为在启动中启动(我的意思是启动广播接收器(时，广播接收器无法正常工作。

我的意思是我的应用程序在启动时自动启动，但应用程序启动的时间是 10 点钟。

这是我的代码

安卓迈菲斯特

<application
    android:allowBackup="true"
    android:icon="@drawable/aps"
    android:label="@string/app_name"
    android:roundIcon="@drawable/aps"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".Main2Activity"
        android:theme="@style/AppTheme.NoActionBar"></activity>

    <receiver android:name=".Tasks">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <action android:name="android.intent.action.QUICKBOOT_POWERON" />
        </intent-filter>
    </receiver>
</application>

主要活动

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setRecurringAlarm(this);
}
private void setRecurringAlarm(Context context) {
        Calendar updateTime = Calendar.getInstance();
        updateTime.setTimeZone(TimeZone.getTimeZone("GMT+5:00"));
        updateTime.set(Calendar.HOUR_OF_DAY, 3);
        updateTime.set(Calendar.MINUTE, 00);
        Intent intent = new Intent(context, Tasks.class);
        PendingIntent recurringDownload = PendingIntent.getBroadcast(context,
                0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        AlarmManager alarms = (AlarmManager) this.getSystemService(
                Context.ALARM_SERVICE);
        alarms.setInexactRepeating(AlarmManager.RTC_WAKEUP,
                updateTime.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, recurringDownload);
    }
}

BroadCastReciver

public class Tasks extends BroadcastReceiver {
    final public static String ONE_TIME = "onetime";
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i(ONE_TIME, "Executed Tasks.Java File");
            Intent i = new Intent();
            i.setClassName(context, Main2Activity.class);
            i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(i);
    }
}

Answer 1

使用两种不同的BroadcastReceiver。一个用于alarm接收器，另一个用于boot完成。

这是您的BootCompletedReceiver：

public class BootCompletedReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Calendar updateTime = Calendar.getInstance();
        updateTime.setTimeZone(TimeZone.getTimeZone("GMT+5:00"));
        updateTime.set(Calendar.HOUR_OF_DAY, 3);
        updateTime.set(Calendar.MINUTE, 00);
        Intent intent = new Intent(context, Tasks.class);
        PendingIntent recurringDownload = PendingIntent.getBroadcast(context,
                0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager alarms = (AlarmManager) this.getSystemService(
                Context.ALARM_SERVICE);
        alarms.setInexactRepeating(AlarmManager.RTC_WAKEUP,
                updateTime.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, recurringDownload);
    }
}

按如下方式更新您的AndroidManifest.xml：

<application
    android:allowBackup="true"
    android:icon="@drawable/aps"
    android:label="@string/app_name"
    android:roundIcon="@drawable/aps"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".Main2Activity"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>

    <receiver android:name=".Tasks">
    </receiver>
    <receiver android:name=".BootCompletedReceiver">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <action android:name="android.intent.action.QUICKBOOT_POWERON" />
        </intent-filter>
    </receiver>
</application>

Answer 2

您为活动中的Alarm和BOOT_COMPLETED事件定义了相同的Receiver;因此，当警报触发器或系统启动时，将调用相同的类(启动主活动(。

您需要定义两个Receiver。一个用于接收警报，另一个用于在启动完成时设置警报，例如：

public class BootBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Calendar updateTime = Calendar.getInstance();
        updateTime.setTimeZone(TimeZone.getTimeZone("GMT+5:00"));
        updateTime.set(Calendar.HOUR_OF_DAY, 3);
        updateTime.set(Calendar.MINUTE, 00);
        Intent intent = new Intent(context, Tasks.class);
        PendingIntent recurringDownload = PendingIntent.getBroadcast(context,
                0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        AlarmManager alarms = (AlarmManager) this.getSystemService(
                Context.ALARM_SERVICE);
        alarms.setInexactRepeating(AlarmManager.RTC_WAKEUP,
                updateTime.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, recurringDownload);
    }
}

，对于您的Alarm接收器，您可以拥有旧的接收器：

public class AlarmReceiver extends BroadcastReceiver {
    final public static String ONE_TIME = "onetime";
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i(ONE_TIME, "Executed Tasks.Java File");
            Intent i = new Intent();
            i.setClassName(context, Main2Activity.class);
            i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(i);
    }
}