BroadcastReceiver 收不到广播事件消息

Question

我创建了我的广播接收器 AnprEventReciever，它应该在连接状态改变时被触发，但它并没有。

AnprEventReciever:

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;

import bi.anpr.layouts.SplashActivity;

public class AnprEventReciever extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.e("test","event recieved");
        Toast.makeText(context, "event recieved" , Toast.LENGTH_LONG).show();
    }
}

清单：

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

    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <application
        android:name="bi.anpr.vlc.VLCApplication"
        android:allowBackup="false"
        android:icon="@mipmap/ic_anpr_launcher_round"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <receiver
            android:name="bi.anpr.core.AnprEventReciever"
            android:enabled="true"
            android:exported="true"
            android:label="StartMyServiceAtBootReceiver">
            <intent-filter>
                <action android:name="android.intent.action.CONNECTIVITY_CHANGE" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </receiver>

        <activity
            android:name="bi.anpr.layouts.MainActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait" />
        <activity
            android:name="bi.anpr.layouts.VideoResourceActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="bi.anpr.layouts.ZoneActivity"
            android:label="Zone Setter"
            android:screenOrientation="portrait" />

        <activity
            android:name="bi.anpr.layouts.SettingsActivity"
            android:label="@string/title_activity_settings"
            android:screenOrientation="portrait" />

        <activity
            android:name="bi.anpr.layouts.SplashActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <meta-data
            android:name="preloaded_fonts"
            android:resource="@array/preloaded_fonts" />

    </application>

</manifest>

请注意，我已经测试了几乎所有可能的操作都失败了 除了 BOOT_COMPLETED，我的 BroadcastReceiver 被成功触发。

Answer 1

感谢 @TheWanderer 通过他的评论帮助我找到答案。在 Android 8.0 Behavior Changes Note 开发人员中提到了以下内容：

Apps cannot use their manifests to register for most implicit broadcasts (that is, broadcasts that are not targeted specifically at the app).

所以我尝试像下面这样以编程方式注册我的 BroadcastReceiver，而不是为其创建清单条目：

private AnprEventReciever myReceiver;
private IntentFilter filter;

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

    filter = new IntentFilter();
    filter.addAction(Intent.ACTION_AIRPLANE_MODE_CHANGED);
    myReceiver = new AnprEventReciever();
}

@Override
protected void onResume() {
    super.onResume();
    registerReceiver(myReceiver, filter);
}

@Override
protected void onPause() {
    super.onPause();
    unregisterReceiver(myReceiver);
}

它工作得很好，但不幸的是，操作 "android.intent.action.CONNECTIVITY_CHANGE" 似乎已被弃用，我在 Intent class 中找不到它，我不知道它是否在其他地方找到。

注意： 在阅读过程中我发现当 activity 暂停或销毁时有必要注销广播接收器，否则你可能会得到尝试注册或重新注册时出错。

更新：

使用 ConnectivityManager.CONNECTIVITY_ACTION 而不是 "android.intent.action.CONNECTIVITY_CHANGE" 创建 intent 过滤器以接收连接改变的广播。

BroadcastReceiver 收不到广播事件消息

BroadcastReceiver doesn't receive the broadcast event message

android

broadcastreceiver

android-service

android-broadcast

android-broadcastreceiver