不能分配给'android.app.activity'扩展应用程序

Question

我正在实施Adobe Creative SDK.我在我的清单文件中收到以下错误:

'com.example.nick.avierytest2.MainActivity is not assignable to android.app.activity' 

这是我的XML文件:

<?xml version="1.0" encoding="utf-8"?>

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

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

这是我的主要活动类:

public class MainActivity extends Application implements IAdobeAuthClientCredentials {

/* Be sure to fill in the two strings below. */
private static final String CREATIVE_SDK_CLIENT_ID = "";
private static final String CREATIVE_SDK_CLIENT_SECRET = "";

@Override
public void onCreate() {
    super.onCreate();
    AdobeCSDKFoundation.initializeCSDKFoundation(
            getApplicationContext(),
            AdobeAuthIMSEnvironment.AdobeAuthIMSEnvironmentProductionUS
    );
}

@Override
public String getClientID() {
    return CREATIVE_SDK_CLIENT_ID;
}

@Override
public String getClientSecret() {
    return CREATIVE_SDK_CLIENT_SECRET;
}

}

每隔一段时间我在stackoverflow上看到这个问题,有人试图在清单中声明一个片段,但这不是问题,我无法找到解决方案.

谢谢您的帮助.

Answer 1

MainActivity extends Application

当然,一个Application不可分配给Activity.

将此更改为MainActivity extends Activity,或将android:name=".MainActivity"清单中的引用移动到application标记(并删除它activity).在后一种情况下,还考虑将类重命名MainActivity为例如MyApplication.