java.lang.ClassCastException: android.app.Application cannot be cast to utils.ClientApp

问题：java.lang.ClassCastException: android.app.Application cannot be cast to utils.ClientApp

解决方法：在AndroidManifest.xml 加

 android:name="utils.ClientApp"

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