Java – null pointer exception on actionbar on fragmentactivity

I received this error while running

Stack trace:

01-22 06:32:55.509: E/AndroidRuntime(3728): FATAL EXCEPTION: main
01-22 06:32:55.509: E/AndroidRuntime(3728): Process: com.qrme.quranmadeeasy,PID: 3728
01-22 06:32:55.509: E/AndroidRuntime(3728): java.lang.RuntimeException: Unable to resume activity {com.qrme.quranmadeeasy/com.qrme.quranmadeeasy.InnerPageActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a null object reference
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2951)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2982)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2365)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.app.ActivityThread.access$800(ActivityThread.java:144)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.os.Handler.dispatchMessage(Handler.java:102)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.os.Looper.loop(Looper.java:135)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.app.ActivityThread.main(ActivityThread.java:5221)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at java.lang.reflect.Method.invoke(Native Method)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at java.lang.reflect.Method.invoke(Method.java:372)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
01-22 06:32:55.509: E/AndroidRuntime(3728): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a null object reference
01-22 06:32:55.509: E/AndroidRuntime(3728):     at com.qrme.quranmadeeasy.InnerPageActivity.ActionBar(InnerPageActivity.java:203)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at com.qrme.quranmadeeasy.InnerPageActivity.onResume(InnerPageActivity.java:71)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1241)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.app.Activity.performResume(Activity.java:6019)
01-22 06:32:55.509: E/AndroidRuntime(3728):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2940)
01-22 06:32:55.509: E/AndroidRuntime(3728):     ... 11 more

InnerPageActivity. java：

public class InnerPageActivity extends FragmentActivity {

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.copyactivity_single_page);

    }
@Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        initialize();
        ActionBar(); --->71 st line
 }


    public void ActionBar() {
        ActionBar mActionBar = getActionBar();
    mActionBar.setDisplayShowHomeEnabled(false); -->203rd line
    mActionBar.setDisplayShowTitleEnabled(false);
    mActionBar.setBackgroundDrawable(new ColorDrawable(Color
            .parseColor("#356AA0")));

    mActionBar.setCustomView(mCustomView);
    mActionBar.setDisplayShowCustomEnabled(true);
    }
}

styles. xml：

<resources>

    <style name="AppBaseTheme" parent="@style/Theme.AppCompat"></style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>
</resources>

manifest. XML file:

<uses-sdk
    android:minSdkVersion="16"
    android:targetSdkVersion="21" />

  <application
        android:name="com.qrme.quranmadeeasy.Application"
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".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>

I don't know how to solve the problem Anyone can help me solve this problem thank you.

Solution

You should change

public class InnerPageActivity extends FragmentActivity

to

public class InnerPageActivity extends ActionBarActivity

In addition, it also changed mcactionbar = getsupportactionbar();