Android/Java ClassCastException error?
Your LockNow class does not extend any Activity but a Receiver so you should declare it that way in your androidManifest. Xml There you have declared both an activity and a receiver for the very same LockNow class You must drop the activity declaration: activity android:name=". LockNow" android:label="@string/app_name.
Your LockNow class does not extend any Activity, but a Receiver, so you should declare it that way in your androidManifest.xml. There you have declared both an activity and a receiver for the very same LockNow class. You must drop the activity declaration: Leave the underlying Controller class as main launcher activity, the LockNow class as receiver.
According to Documentation DeviceAdminReceiver is not an Activity and thus it probably shouldn't be defined as one. According to the Example the actual receiver belongs into tags.
04-27 04:02:47.785: ERROR/AndroidRuntime(1553): java.lang. RuntimeException: Unable to instantiate activity ComponentInfo{com.example. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at android.app.ActivityThread.
04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at android.app.ActivityThread. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at android.app.ActivityThread. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at android.app.
04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at android.os.Handler. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at android.os.Looper. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at android.app.ActivityThread.
04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at java.lang.reflect.Method. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at java.lang.reflect.Method. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at com.android.internal.os.
04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at com.android.internal.os.ZygoteInit. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at dalvik.system.NativeStart. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): Caused by: java.lang.
04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at android.app.Instrumentation. 04-27 04:02:47.785: ERROR/AndroidRuntime(1553): at android.app.ActivityThread.
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