如何为广播接收器定义 IntentFilter

发布于 2024-12-22 11:44:50 字数 463 浏览 0 评论 0原文

因此，我试图制作一个应用程序，在收到每条短信时都会显示一条祝酒消息。我希望应用程序仅显示 toast，并且我当前使用此代码来显示它，但在应用程序运行时出现异常错误。我正在使用这段代码，

BroadcastReceiver BR = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText( context, "testing", Toast.LENGTH_SHORT ).show();

        }
    };


    IntentFilter filter = new  IntentFilter();

    registerReceiver(BR, filter);

我很确定它是意图过滤器，但我不确定。

原文

So I am attempting to make an application that will show a toast message when every a text message is received. I want the application to only show the toast, and I currently using this code to show it, but I get an exception error when the application runs. I am using this code

BroadcastReceiver BR = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText( context, "testing", Toast.LENGTH_SHORT ).show();

        }
    };


    IntentFilter filter = new  IntentFilter();

    registerReceiver(BR, filter);

I'm pretty sure it's the intent filter, but I'm not sure.

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和影子一齐双人舞 2024-12-29 11:44:50

您必须在清单中输入广播接收器的条目，然后添加我们为活动添加的意图过滤器。这在运行时也是可能的。

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紙鸢 2024-12-29 11:44:50

您应该创建扩展 BroadcastReceiver 的单独类
然后重写 onRecieve 方法。

在这里，AlarmMain.this 是主类，
OneShotAlarm.class 扩展了 BroadcaseReceiver ：

@Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText( context, "testing", Toast.LENGTH_SHORT ).show();

        }

您可以按照以下方式调用 onRecieve() ：

Intent intentAlarm = new Intent(AlarmMain.this, OneShotAlarm.class);
operation = PendingIntent.getBroadcast(AlarmMain.this, 0, intentAlarm, 0);

alarmManager  = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, objDate.getTime(), operation);

您可以尝试以下操作，但它是可选的（将以下标记包含到 AndroidManifest.xml 中）

<receiver 
    android:name="com.android.alarm.OneShotAlarm"
    android:exported="true">
    <intent-filter>
        <action android:name="com.android.vending.INSTALL_REFERRER" />
    </intent-filter>
</receiver>

You should create seperate class which extends BroadcastReceiver
and then override onRecieve method.

Here, AlarmMain.this is main class and
OneShotAlarm.class which extends BroadcaseReceiver :

@Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText( context, "testing", Toast.LENGTH_SHORT ).show();

        }

You can call onRecieve() as per following:

Intent intentAlarm = new Intent(AlarmMain.this, OneShotAlarm.class);
operation = PendingIntent.getBroadcast(AlarmMain.this, 0, intentAlarm, 0);

alarmManager  = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, objDate.getTime(), operation);

You can try following but it is optional (include following tag into AndroidManifest.xml)

<receiver 
    android:name="com.android.alarm.OneShotAlarm"
    android:exported="true">
    <intent-filter>
        <action android:name="com.android.vending.INSTALL_REFERRER" />
    </intent-filter>
</receiver>

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