运行时错误启动由ClassCastException引起的服务

I am getting runtime error, trying to start a boot-time service. Its failing but there is no hint I can see. The intent is finding the Service but it doesn't get to onCreate or onStart.

我收到运行时错误,尝试启动启动时服务。它失败了,但我没有看到任何暗示。目的是找到服务,但它没有进入onCreate或onStart。

public class ControlReceiver extends BroadcastReceiver
{
  /**
   * @see android.content.BroadcastReceiver#onReceive(Context,Intent)
   */
  @Override
  public void onReceive(Context context, Intent intent)
  {
    Intent service = new Intent(context, MyApp.class);
    Log.d("rcvr", "Received intent:" + intent.getAction());
    context.startService(service);
  }
}

The manifest:

<manifest 
    android:versionCode="1" 
    android:versionName="1.0"
    package="com.company.package" 
    xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-sdk 
        android:minSdkVersion="9" 
        android:targetSdkVersion="10"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_GPS"/>
    <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS"/>
    <uses-permission android:name="android.permission.ACCESS_CELL_ID"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_LOGS"/>
    <uses-permission android:name="android.permission.SET_ACTIVITY_WATCHER"/>
    <uses-permission android:name="android.permission.STATUS_BAR"/>
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
    <uses-permission android:name="android.permission.BROADCAST_STICKY"/>
    <uses-permission android:name="android.permission.CONTROL_LOCATION_UPDATES"/>
    <uses-permission android:name="android.permission.SET_DEBUG_APP"/>
    <uses-permission android:name="android.permission.BATTERY_STATS"/>
    <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"/>
    <uses-permission android:name="android.permission.BIND_DEVICE_ADMIN"/>
    <uses-permission android:name="android.permission.DIAGNOSTIC"/>
    <uses-permission android:name="android.permission.DEVICE_POWER"/>
    <uses-permission android:name="android.permission.DUMP"/>
    <uses-permission android:name="android.permission.CHANGE_COMPONENT_ENABLED_STATE"/>
    <uses-permission android:name="android.permission.SIGNAL_PERSISTENT_PROCESSES"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <uses-permission android:name="android.permission.PERSISTENT_ACTIVITY"/>
    <uses-permission android:name="android.permission.HARDWARE_TEST"/>
    <uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES"/>

    <application 
        android:icon="@drawable/ic_launcher"
        android:label="@string/mod_name" 
        android:name=".MyApp">

        <!-- We declare our service here -->
        <service 
            android:enabled="true" 
            android:exported="true"
            android:icon="@drawable/ic_launcher"
            android:label="@string/serv_name" 
            android:name=".MyApp" 
            android:process=":my_process">
            <intent-filter>
              <action android:name="com.company.package.MY_INTENT" />
            </intent-filter>
            </service>
        <receiver 
            android:name=".ControlReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
                <action android:name="android.intent.action.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE" />
            </intent-filter>
        </receiver>
        <receiver 
            android:name=".BatteryHelper" >
            <intent-filter>
                <action android:name="android.intent.action.BATTERY_OKAY"/>
                <action android:name="android.intent.action.BATTERY_CHANGED"/>
                <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/>
                <action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
                <action android:name="android.intent.action.BATTERY_LOW"/>
                <category android:name="android.intent.category.INFO"/>
            </intent-filter>
        </receiver>
    </application>
</manifest>

The exception thrown

抛出异常

FATAL EXCEPTION: main 
java.lang.RuntimeException: Unable to instantiate application com.company.package.MyApp: java.lang.ClassCastException: com.company.package.MyApp cannot be cast to android.app.Application    
 at android.app.LoadedApk.makeApplication(LoadedApk.java:529)    
 at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4442)     
 at android.app.ActivityThread.access$1300(ActivityThread.java:139)     
 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305)     
 at android.os.Handler.dispatchMessage(Handler.java:99)     
 at android.os.Looper.loop(Looper.java:154)     
 at android.app.ActivityThread.main(ActivityThread.java:4945)    
 at java.lang.reflect.Method.invokeNative(Native Method)     
 at java.lang.reflect.Method.invoke(Method.java:511)

Update
When I removed android:name=".MyApp" for the application from the manifest, the service started. Anyone know why?

更新当我从清单中删除了应用程序的android:name =“。MyApp”时,服务启动了。谁知道为什么?

1 个解决方案

#1

when I removed android:name=".MyApp" for the application from the manifest, the service started. Anyone know why?

当我从清单中删除了应用程序的android:name =“。MyApp”时,服务就开始了。谁知道为什么?

The reason for this is most likely the fact that your MyApp class does not extend android.app.Application.

这样做的原因很可能是你的MyApp类没有扩展android.app.Application。

As the Android Developer Site says:

正如Android开发者网站所说:

android:name

The fully qualified name of an Application subclass implemented for the application. When the application process is started, this class is instantiated before any of the application's components.

为应用程序实现的Application子类的完全限定名称。启动应用程序进程时,将在任何应用程序的组件之前实例化此类。

The subclass is optional; most applications won't need one. In the absence of a subclass, Android uses an instance of the base Application class.

子类是可选的;大多数应用程序不需要一个。在没有子类的情况下,Android使用基本Application类的实例。

Since subclassing Application is optional, removing android:name=".MyApp" allows your app to properly start because you're no longer trying to cast MyApp to Application which is exactly what your exception claims your app is trying to do.

由于子类化应用程序是可选的,删除android:name =“。MyApp”允许您的应用程序正确启动,因为您不再尝试将MyApp强制转换为应用程序,这正是您的应用程序尝试执行的异常声明。

#1