Android 刀柄注射不适用于接收器

使用Hilt的BroadcastReceiver内部的依赖项注入不起作用。我试图使用来自

main活动的警报调用
BroadcastReceiver
，我得到
未初始化的PropertyAccessException
。根据文档，它应该像向接收器添加
@AndroidEntryPoint
注释一样简单，但它不是

示例代码：

@HiltAndroidApp
class App: Application() {
    override fun onCreate() {
        super.onCreate()
        Log.d(App::class.simpleName, "onCreate: Application")
    }
}

class TestHiltInjection @Inject constructor() {

    operator fun invoke() {
        Log.d(TestHiltInjection::class.java.simpleName, "invoke called.")
    }
}

@AndroidEntryPoint
class HiltBroadcastReceiver : BroadcastReceiver() {

    @Inject lateinit var testHiltInjection: TestHiltInjection

    override fun onReceive(context: Context?, intent: Intent?) {
        testHiltInjection()
    }
}

@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val manager = getSystemService(Context.ALARM_SERVICE) as AlarmManager

        val pending = PendingIntent
            .getBroadcast(this, 0, Intent(this, HiltBroadcastReceiver::class.java), 0)
        manager.setInexactRepeating(
            AlarmManager.ELAPSED_REALTIME_WAKEUP,
            15000, 15000,
            pending
        )
    }
}

App.kt:

@HiltAndroidApp
class App: Application() {
    override fun onCreate() {
        super.onCreate()
        Log.d(App::class.simpleName, "onCreate: Application")
    }
}

class TestHiltInjection @Inject constructor() {

    operator fun invoke() {
        Log.d(TestHiltInjection::class.java.simpleName, "invoke called.")
    }
}

@AndroidEntryPoint
class HiltBroadcastReceiver : BroadcastReceiver() {

    @Inject lateinit var testHiltInjection: TestHiltInjection

    override fun onReceive(context: Context?, intent: Intent?) {
        testHiltInjection()
    }
}

@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val manager = getSystemService(Context.ALARM_SERVICE) as AlarmManager

        val pending = PendingIntent
            .getBroadcast(this, 0, Intent(this, HiltBroadcastReceiver::class.java), 0)
        manager.setInexactRepeating(
            AlarmManager.ELAPSED_REALTIME_WAKEUP,
            15000, 15000,
            pending
        )
    }
}

testhilt.kt:

@HiltAndroidApp
class App: Application() {
    override fun onCreate() {
        super.onCreate()
        Log.d(App::class.simpleName, "onCreate: Application")
    }
}

class TestHiltInjection @Inject constructor() {

    operator fun invoke() {
        Log.d(TestHiltInjection::class.java.simpleName, "invoke called.")
    }
}

@AndroidEntryPoint
class HiltBroadcastReceiver : BroadcastReceiver() {

    @Inject lateinit var testHiltInjection: TestHiltInjection

    override fun onReceive(context: Context?, intent: Intent?) {
        testHiltInjection()
    }
}

@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val manager = getSystemService(Context.ALARM_SERVICE) as AlarmManager

        val pending = PendingIntent
            .getBroadcast(this, 0, Intent(this, HiltBroadcastReceiver::class.java), 0)
        manager.setInexactRepeating(
            AlarmManager.ELAPSED_REALTIME_WAKEUP,
            15000, 15000,
            pending
        )
    }
}

希尔顿接收机.kt:

@HiltAndroidApp
class App: Application() {
    override fun onCreate() {
        super.onCreate()
        Log.d(App::class.simpleName, "onCreate: Application")
    }
}

class TestHiltInjection @Inject constructor() {

    operator fun invoke() {
        Log.d(TestHiltInjection::class.java.simpleName, "invoke called.")
    }
}

@AndroidEntryPoint
class HiltBroadcastReceiver : BroadcastReceiver() {

    @Inject lateinit var testHiltInjection: TestHiltInjection

    override fun onReceive(context: Context?, intent: Intent?) {
        testHiltInjection()
    }
}

@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val manager = getSystemService(Context.ALARM_SERVICE) as AlarmManager

        val pending = PendingIntent
            .getBroadcast(this, 0, Intent(this, HiltBroadcastReceiver::class.java), 0)
        manager.setInexactRepeating(
            AlarmManager.ELAPSED_REALTIME_WAKEUP,
            15000, 15000,
            pending
        )
    }
}

MainActivity.kt:

@HiltAndroidApp
class App: Application() {
    override fun onCreate() {
        super.onCreate()
        Log.d(App::class.simpleName, "onCreate: Application")
    }
}

class TestHiltInjection @Inject constructor() {

    operator fun invoke() {
        Log.d(TestHiltInjection::class.java.simpleName, "invoke called.")
    }
}

@AndroidEntryPoint
class HiltBroadcastReceiver : BroadcastReceiver() {

    @Inject lateinit var testHiltInjection: TestHiltInjection

    override fun onReceive(context: Context?, intent: Intent?) {
        testHiltInjection()
    }
}

@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val manager = getSystemService(Context.ALARM_SERVICE) as AlarmManager

        val pending = PendingIntent
            .getBroadcast(this, 0, Intent(this, HiltBroadcastReceiver::class.java), 0)
        manager.setInexactRepeating(
            AlarmManager.ELAPSED_REALTIME_WAKEUP,
            15000, 15000,
            pending
        )
    }
}

输出日志：

kotlin.UninitializedPropertyAccessException: lateinit property testHiltInjection has not been initialized

更新

问题已经在2.29.1版本中解决，只需使用
@AndroidEntryPoint
我认为hilt目前不支持BroadcastReceiver。在说

注意：Hilt目前只支持扩展ComponentActivity的活动和扩展androidx库片段的片段，而不支持Android平台中的（现已弃用）片段

内部工作原理：Hilt为带注释的组件（活动、片段、BroadcastReceiver等）创建抽象类，BroadcastReceiver将生成的类扩展为字节码转换中的基类。在基类
onReceive
中注入方法对象。但在生成的字节码类中，不会调用super class
onReceive
方法。这就是为什么你的物体没有被注入。
要测试，请在
testHiltInjection（）之前在
HiltBroadcastReceiver
类中添加以下代码。顺便说一下，它仍然处于Alpha模式

((HiltBroadcastReceiver_GeneratedInjector) BroadcastReceiverComponentManager.generatedComponent(context)).injectHiltBroadcastReceiver(UnsafeCasts.<HiltBroadcastReceiver>unsafeCast(this));

（（HiltBroadcastReceiver\u GeneratedInjector）BroadcastReceiverComponentManager.generatedComponent（上下文））.injectHiltBroadcastReceiver（unsecast.unsecast（this））；

更新：现在问题已在版本
2.29.1-alpha
中修复。另外，不要忘记将hilt android gradle插件升级到
2.29.1-alpha
或最新版本。更多信息

修复#1918：支持带有@AndroidEntryPoint转换的广播接收器。（ede018b）

更新：根据需要，问题应在匕首柄版本中修复。因此，只需使用版本
2.29.1-alpha
或更高版本即可。别忘了更新hilt android gradle插件的版本


原始答案：有一个GitHub和一个。注入似乎不起作用，因为它实际上发生在生成的父类的
onReceive（）方法中。问题是你不能调用超级方法，因为它是抽象的。但您可以创建一个简单的包装器类来解决此问题：

抽象类BroadcastReceiver:BroadcastReceiver（）{
@超级呼叫
重写接收（上下文：上下文，意图：意图）{}
}
@雄蕊识别点
类MyBroadcastReceiver:HiltBroadcastReceiver（）{
@注入lateinit变量testHiltInjection:testHiltInjection
覆盖接收（上下文：上下文？，意图：意图？）{
super.onReceive（context，intent）/当前，由于刀柄错误，您不能将
@AndroidEntryPoint
用于BroadcastReceiver。
相反，您使用这样的变通逻辑

@AndroidEntryPoint
public class SMSReceiver extends BroadcastReceiver {
    @Inject
    public DataManager dataManager;

    @Override
    public void onReceive(final Context context, Intent intent) {
    }
}

如果要在BroadcastReceiver中插入SomeModule

创建新入口点

@EntryPoint
@InstallIn(ApplicationComponent::class)
interface MyEntryPoint {
    fun getSomeModule: SomeModule
}


获取入口点并使用它

class MyBroadcastReceiver : BroadcastReceiver() {
   override fun onReceive(context: Context?, intent: Intent?) {
    val someModule : SomeModule =
      EntryPoints.get(context?.applicationContext, MyEntryPoint::class.java)
   .getSomeModule()
  }
}


使用Hilt的稳定版本。您可以轻松地注入任何这样的变量

@AndroidEntryPoint
public class SMSReceiver extends BroadcastReceiver {
    @Inject
    public DataManager dataManager;

    @Override
    public void onReceive(final Context context, Intent intent) {
    }
}

它工作得很好。是的，我知道它是在alpha模式下工作的，但我的想法是测试和报告错误。另外，在文档中，他们没有明确地表明BroadcastReceiver不受支持。解决方法不错。这看起来像是一个刀柄错误，文档确实说BroadcastReceiver受支持。我在他们的github@FrankHarper上对此提出了一个问题，这是一个很好的解决方法你的github问题：很好的发现！！我不敢相信谷歌在发布它之前没有发现它…一个相关的主题@ValeriyKatkov…你在
匕首刀柄
标记向上投票同义词方面有足够的声誉。你能在这里做到吗：？似乎没有版主关心给
刀柄
相关标记带来秩序，所以我试着合作我自己决定。@Valeriy Katkov我使用了提供的解决方法，非常感谢，但广播接收器仍然不会在我的应用程序中调用。还有什么需要做的吗？这就是我目前所做的。@Valeriy Katkov我也面临着同样的问题。我尝试了你建议的解决方法，并升级了hilt gradle插件锡安，还是不走运。你能帮忙吗？