java - 广播接收器不能静态工作

Question

我想通过广播接收器在手机电源连接和断开时发出通知。 但问题是，当我在 list 中定义接收器时，它不起作用，但如果我动态定义它，它就可以很好地工作。 这是我的 list .xml:

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


    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        tools:ignore="GoogleAppIndexingWarning">

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name=".PowerConnectionReceiver">
            <intent-filter>
                <action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
                <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/>
            </intent-filter>
        </receiver>
    </application>

</manifest>

这是我的广播:

package com.example.batterymanager;

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

public class PowerConnectionReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        /*if (intent.getAction().equals("android.intent.action.ACTION_POWER_CONNECTED")) {
            Toast.makeText(context, "Power Connected", Toast.LENGTH_SHORT).show();
        } else if (intent.getAction().equals("android.intent.action.ACTION_POWER_DISCONNECTED")){
            Toast.makeText(context, "Power Disconnected", Toast.LENGTH_SHORT).show();
        }*/

        Toast.makeText(context, "" + intent.getAction(), Toast.LENGTH_SHORT).show();
        Log.i("HUU", intent.getAction());
    }
}

我不知道为什么它不起作用! ):

Answer 1

新的 Android 限制:

As part of the Android 8.0 (API level 26) Background Execution Limits, apps that target the API level 26 or higher can no longer register broadcast receivers for implicit broadcasts in their manifest. However, several broadcasts are currently exempted from these limitations. Apps can continue to register listeners for the following broadcasts, no matter what API level the apps target.

https://developer.android.com/guide/components/broadcast-exceptions