广播接收器BATTERY_LOW显示低电量警告时崩溃

Question

我通过意图过滤器BATTERY_LOW和BATTERY_OKAYBroadcastReceiver电池，此接收器工作正常，但是当显示低电量警告(电池百分比低于15%(时，应用程序因以下日志而崩溃：

12-18

03：13：49.651 1802-1802/E/Android运行时间：致命 异常：主要 进程： ， PID： 1802 java.lang.RuntimeException：无法实例化接收器接收器。BatteryLevelReceiver： java.lang.ClassNotFoundException： 未找到类"接收器"。BatteryLevelReceiver" on path： DexPathList[[zip file "/data/app/-1.apk"， zip 文件 "/data/data//code_cache/secondary-dexes/-1.apk.classes2.zip"， zip...

电池电量接收器：

public class BatteryLevelReceiver extends BroadcastReceiver {
private static final String TAG = BatteryLevelReceiver.class.getSimpleName();
@Override
public void onReceive(Context context, Intent intent) {
try {
int curentPercent = getBatteryPercentage(context);
Log.e(TAG, "getBatteryPercentage: " + curentPercent);
} catch (Exception e){
e.printStackTrace();
}
}
public static int getBatteryPercentage(Context context) {
try {
if (Build.VERSION.SDK_INT >= 21) {
BatteryManager bm = (BatteryManager) context.getSystemService(Context.BATTERY_SERVICE);
return bm.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY);
} else {
IntentFilter iFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = context.registerReceiver(null, iFilter);
int level = batteryStatus != null ? batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1) : -1;
int scale = batteryStatus != null ? batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE, -1) : -1;
double batteryPct = level / (double) scale;
return (int) (batteryPct * 100);
}
}catch(Exception e) {
e.printStackTrace();
Log.e(TAG, "getBatteryPercentage: ");
}
return 1111;
}
}

安卓清单：

<application
android:name=".AppController"
android:allowBackup="true"
android:icon="@mipmap/ic_logo"
android:label="@string/app_name"
android:networkSecurityConfig="@xml/network_security_config"
android:supportsRtl="true"
android:largeHeap="true"
android:hardwareAccelerated="true"
android:theme="@style/AppTheme">
...

<receiver android:name="receivers.BatteryLevelReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BATTERY_LOW"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.BATTERY_OKAY"/>
</intent-filter>
</receiver>
</application>

应用类：

public class AppController extends MultiDexApplication {
...

@Override
public void onCreate() {
super.onCreate();
MultiDex.install(this);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
}
}

格拉德尔：

apply plugin: 'com.android.application'

apply plugin: 'io.fabric'
android {
compileSdkVersion 28
defaultConfig {
...
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
externalNativeBuild {
cmake {
cppFlags "-std=c++11"
}
}
vectorDrawables.useSupportLibrary = true
}
dexOptions {
jumboMode true
javaMaxHeapSize "4g"
}
buildTypes {
release {
// Enables code shrinking, obfuscation, and optimization for only
// your project's release build type.
minifyEnabled true
// Enables resource shrinking, which is performed by the
// Android Gradle plugin.
shrinkResources true
// Includes the default ProGuard rules files that are packaged with
// the Android Gradle plugin. To learn more, go to the section about
// R8 configuration files.
proguardFiles getDefaultProguardFile(
'proguard-android-optimize.txt'),
'proguard-rules.pro'
}
debug{
// Enables code shrinking, obfuscation, and optimization for only
// your project's release build type.
minifyEnabled true
// Enables resource shrinking, which is performed by the
// Android Gradle plugin.
shrinkResources true
// Includes the default ProGuard rules files that are packaged with
// the Android Gradle plugin. To learn more, go to the section about
// R8 configuration files.
proguardFiles getDefaultProguardFile(
'proguard-android-optimize.txt'),
'proguard-rules.pro'
}
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.support:support-annotations:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

...

implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'
implementation 'com.android.support:multidex:1.0.3'

}

apply plugin: 'com.google.gms.google-services'

我将意图操作从"低"更改为"已更改"，但问题未解决。

Answer 1

您正在尝试在广播接收器中注册广播接收器，

删除Intent batteryStatus = context.registerReceiver(null, iFilter);

在活动/片段中注册服务

如果要发送广播，则应致电context.sendBroadcast