java - 为什么我的 AlarmManager 不触发 BroadcastReceiver

Question

在我的应用程序中，我尝试使用 AlarmManager 调用 BroadcastReceiver 以每分钟调用该服务。但由于某种原因，它没有被调用。我不知道这是为什么。我正在按照一个工作项目编写这段代码，但我找不到任何不同之处。请帮忙。

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.shan.chathuranga.smsscheduler">

    <uses-permission android:name="android.permission.SEND_SMS" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.WRITE_CONTACTS" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".activities.SplashScreen">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".activities.MainActivity"/>
        <activity android:name=".activities.ServiceChecker"/>

        <service
            android:name="services.MessageSendingService"
            android:enabled="true"
            android:exported="true"/>

        <receiver android:name="broadcastReceiver.MessageServiceScheduler">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>

        <receiver android:name="broadcastReceiver.MessageServiceTrigger"/>

        <receiver
            android:name="broadcastReceiver.SendBroadcastReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="SMS_SENT" />
            </intent-filter>
        </receiver>

        <receiver
            android:name="broadcastReceiver.DeliveryBroadcastReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="SMS_DELIVERED" />
            </intent-filter>
        </receiver>

    </application>

</manifest>

启动画面.java

public class SplashScreen extends AppCompatActivity {

    private Button mainUI;
    private TextView dateTime;
    private Button serviceChecker;
    private static final long REPEAT_TIME = 1000;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash_screen);

        this.initializeDatabase();
        this.triggerService();

        mainUI = (Button) findViewById(R.id.main_ui);
        dateTime = (TextView) findViewById(R.id.date_time);
        serviceChecker = (Button) findViewById(R.id.service);

        DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
        Calendar cal = Calendar.getInstance();
        dateTime.setText(dateFormat.format(cal.getTime()));

        mainUI.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent i = new Intent(SplashScreen.this, MainActivity.class);
                startActivity(i);
            }
        });

        serviceChecker.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent i = new Intent(SplashScreen.this, ServiceChecker.class);
                startActivity(i);
            }
        });

    }

    public void initializeDatabase() {
        DBAdapter dbAdapter = new DBAdapter(this);
        dbAdapter.open();
        dbAdapter.close();
    }

    public void triggerService() {

        Intent intent = new Intent(this, MessageServiceTrigger.class);
        PendingIntent pending = PendingIntent.getBroadcast(this.getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Calendar cal = Calendar.getInstance();
        alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), REPEAT_TIME, pending);

    }
}

MessageServiceTrigger.java

public class MessageServiceTrigger extends BroadcastReceiver {

    private static final String TAG = MessageServiceTrigger.class.getSimpleName();

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG,TAG+" onReceive get called");
    }
}

Answer 1

首先，您需要更改 REPEAT_TIME = 1000; 这对应于 1 秒，而不是一分钟。

private static final long REPEAT_TIME = 60000;

接下来尝试更改您的 triggerService() 方法，如下所示。

public void triggerService() {
    Intent intent = new Intent(this, MessageServiceTrigger.class);
    PendingIntent pending = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
    AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    alarm.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), REPEAT_TIME, pending);
}