首次运行该应用程序时出现错误，无法投放问题

Question

E/AndroidRuntime: FATAL EXCEPTION: main Process: de.mywoofi.app, PID: 17970 java.lang.RuntimeException: Unable to instantiate application de.mywoofi.app.MyWoofiApplication_: java.lang.ClassCastException: de.mywoofi.app.MyWoofiApplication_ cannot be cast to android.app.Application at android.app.LoadedApk.makeApplication(LoadedApk.java:1069) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5842) at android.app.ActivityThread.access$1100(ActivityThread.java:199) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1650) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) Caused by: java.lang.ClassCastException: de.mywoofi.app.MyWoofiApplication_ cannot be cast to android.app.Application at android.app.AppComponentFactory.instantiateApplication(AppComponentFactory.java:50) at android.support.v4.app.CoreComponentFactory.instantiateApplication(CoreComponentFactory.java:49) at android.app.Instrumentation.newApplication(Instrumentation.java:1120) at android.app.LoadedApk.makeApplication(LoadedApk.java:1061) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5842) at android.app.ActivityThread.access$1100(ActivityThread.java:199) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1650) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

The Problem is, that I have no idea, what the exact solution is. I've tried a lot of "solutions" from this page, but maybe I'm to stupid to resolve that problem. If there are any request for some Code, please ask.

Thanks for your help!

The requested Class (shortened)

@EActivity(de.mywoofi.app.R.layout.activity_main)
public class MyWoofiApplication extends Activity
{ [...]
}

And the cast:

<application
    android:name=".MyWoofiApplication_"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme"
    tools:replace="android:icon"
    android:fullBackupContent="true"
    tools:ignore="AllowBackup,GoogleAppIndexingWarning">
    <activity
        android:name=".ui.activity.SplashActivity_"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.Full"
        android:screenOrientation="portrait">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

My updated Manifest

<application
    android:name=".ApplicationClass"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme"
    tools:replace="android:icon"
    android:fullBackupContent="true"
    tools:ignore="AllowBackup,GoogleAppIndexingWarning">
    <activity
        android:name=".ui.activity.SplashActivity_"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.Full"
        android:screenOrientation="portrait">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

here my ApplicationClass.java

public class ApplicationClass extends Application{

@Override
public void onCreate(){
    super.onCreate();
    StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
    .detectAll()
    .penaltyLog()
    .build());
}

}

Answer 1

以android名称命名-在Manifest.xml中，您拥有此MyWoofiApplication_但仅需要此MyWoofiApplication对吗？

Answer 2

you have this line in manifest:

<application
    android:name=".MyWoofiApplication_"

so MyWoofiApplication_ should extends android.app.Application but it did not so you have this exception:

de.mywoofi.app.MyWoofiApplication_ cannot be cast to android.app.Application

Answer 3

Application need to extends Application and mentioned in Manifest file & MainActivity extends Activity

You got error because your MyWoofiApplication_ is not extend Application it's extend Activity so got that's why you got this error:

de.mywoofi.app.MyWoofiApplication_ cannot be cast to android.app.Application

Application Class

public class ApplicationClass extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                .detectAll()
                .penaltyLog()
                .build());
    }
}

Manifest File

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

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

    <application
        android:name=".ApplicationClass"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:largeHeap="true"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".SplashActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar"
            android:windowSoftInputMode="adjustResize" />
    </application>

MainActivity.java

public class MainActivity extends Activity {    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
        setContentView(R.layout.activity_main);       
    }
 }

Hope you understand now and it may help to you.

Answer 4

MyWoofiApplication_ is extending Activity so you can not cast it to Application.

You can remove android:name=".MyWoofiApplication_" from your application tag to resolve your issue.