BroadcastReceiver 用于处理 BOOT COMPLETED 事件

下面的示例显示了如何创建能够接收 BOOT_COMPLETED 事件的 BroadcastReceiver。通过这种方式，你可以在设备启动后立即启动 Service 或启动 Activity。

此外，你可以使用 BOOT_COMPLETED 事件来恢复警报，因为它们会在设备断电时被销毁。

注意： 用户需要至少启动一次应用程序才能收到 BOOT_COMPLETED 操作。

AndroidManifest.xml 中

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.test.example" >
    ...
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    ...

    <application>
        ...

        <receiver android:name="com.test.example.MyCustomBroadcastReceiver">
        <intent-filter>
                <!-- REGISTER TO RECEIVE BOOT_COMPLETED EVENTS -->
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>
    </application>
</manifest>

MyCustomBroadcastReceiver.java

public class MyCustomBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();

        if(action != null) {
            if (action.equals(Intent.ACTION_BOOT_COMPLETED) ) {
                // TO-DO: Code to handle BOOT COMPLETED EVENT
                // TO-DO: I can start an service.. display a notification... start an activity
            } 
        }
    }
}