Crystal Ball launch Problem

This is happening only after i add a CrystalBall image.

I tried just before adding image and it worked fine

I'm using Genymotion emulator

Please post the error you are getting from logcat. There are a million and one ways that this could go wrong.

08-19 17:45:49.705: D/AndroidRuntime(1895): Shutting down VM 08-19 17:45:49.705: W/dalvikvm(1895): threadid=1: thread exiting with uncaught exception (group=0xa4d2db20) 08-19 17:45:49.717: E/AndroidRuntime(1895): FATAL EXCEPTION: main 08-19 17:45:49.717: E/AndroidRuntime(1895): Process: com.example.crystalball, PID: 1895 08-19 17:45:49.717: E/AndroidRuntime(1895): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.crystalball/com.example.crystalball.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.app.ActivityThread.access$800(ActivityThread.java:135) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.os.Handler.dispatchMessage(Handler.java:102) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.os.Looper.loop(Looper.java:136) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.app.ActivityThread.main(ActivityThread.java:5017) 08-19 17:45:49.717: E/AndroidRuntime(1895): at java.lang.reflect.Method.invokeNative(Native Method) 08-19 17:45:49.717: E/AndroidRuntime(1895): at java.lang.reflect.Method.invoke(Method.java:515) 08-19 17:45:49.717: E/AndroidRuntime(1895): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 08-19 17:45:49.717: E/AndroidRuntime(1895): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 08-19 17:45:49.717: E/AndroidRuntime(1895): at dalvik.system.NativeStart.main(Native Method) 08-19 17:45:49.717: E/AndroidRuntime(1895): Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:111) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.support.v7.app.ActionBarActivityDelegateICS.onCreate(ActionBarActivityDelegateICS.java:58) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:98) 08-19 17:45:49.717: E/AndroidRuntime(1895): at com.example.crystalball.MainActivity.onCreate(MainActivity.java:16) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.app.Activity.performCreate(Activity.java:5231) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 08-19 17:45:49.717: E/AndroidRuntime(1895): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) 08-19 17:45:49.717: E/AndroidRuntime(1895): ... 11 more

This is what its showing.. i don't knpw

The error seems to be that it can't start the activity because "You need to use a Theme.AppCompat theme (or descendant) with this activity." Post your application manifest for us to take a look at.

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.crystalball" android:versionCode="1" android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="19" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" >
    <activity
        android:name="com.example.crystalball.MainActivity"
        android:label="@string/app_name" android:screenOrientation="portrait">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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

</manifest>

"WHEN I CHANGE TO APP COMPAT THEME ITS WORKING FINE BUT I WANT THE THEME WHICH I POSTED IN THE ABOVE CODE ". WHAT SHOULD I DO??

android:theme="@android:style/Theme.DeviceDefault.Dialog.NoActionBar" is a Dialog theme. You can change it to a bunch of different themes but not a dialog theme. That's your answer! As the error said "You need to use a Theme.appcompat" variant. What is your MainActivity extending?