android app not working in ver. 2.3

Question

My app works fine on android version 4.0+, but there is an error when i try to start it on ver. 2.3 any suggestions? android:minSdkVersion="8" android:targetSdkVersion="15"

09-16 21:37:29.759: E/AndroidRuntime(8307): FATAL EXCEPTION: main

09-16 21:37:29.759: E/AndroidRuntime(8307): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.Catholic_app/com.example.Catholic_app.News.Top}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1659)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1675)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.app.ActivityThread.access$1500(ActivityThread.java:121)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.os.Handler.dispatchMessage(Handler.java:99)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.os.Looper.loop(Looper.java:130)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.app.ActivityThread.main(ActivityThread.java:3701)

09-16 21:37:29.759: E/AndroidRuntime(8307): at java.lang.reflect.Method.invokeNative(Native Method)

09-16 21:37:29.759: E/AndroidRuntime(8307): at java.lang.reflect.Method.invoke(Method.java:507)

09-16 21:37:29.759: E/AndroidRuntime(8307): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)

09-16 21:37:29.759: E/AndroidRuntime(8307): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624)

09-16 21:37:29.759: E/AndroidRuntime(8307): at dalvik.system.NativeStart.main(Native Method)

09-16 21:37:29.759: E/AndroidRuntime(8307): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:581)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.view.LayoutInflater.inflate(LayoutInflater.java:386)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)

09-16 21:37:29.759: E/AndroidRuntime(8307): at com.jeremyfeinstein.slidingmenu.lib.SlidingMenu.setMenu(SlidingMenu.java:375)

09-16 21:37:29.759: E/AndroidRuntime(8307): at com.example.Catholic_app.News.Top.createSlidingMenu(Top.java:81)

09-16 21:37:29.759: E/AndroidRuntime(8307): at com.example.Catholic_app.News.Top.onCreate(Top.java:70)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1623)

09-16 21:37:29.759: E/AndroidRuntime(8307): ... 11 more

09-16 21:37:29.759: E/AndroidRuntime(8307): Caused by: java.lang.ClassNotFoundException: android.view.fragment in loader dalvik.system.PathClassLoader[/data/app/com.example.Catholic_app-1.apk]

09-16 21:37:29.759: E/AndroidRuntime(8307): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)

09-16 21:37:29.759: E/AndroidRuntime(8307): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)

09-16 21:37:29.759: E/AndroidRuntime(8307): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.view.LayoutInflater.createView(LayoutInflater.java:471)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:549)

09-16 21:37:29.759: E/AndroidRuntime(8307): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)

09-16 21:37:29.759: E/AndroidRuntime(8307): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:568)

09-16 21:37:29.759: E/AndroidRuntime(8307): ... 19 more

I do not use getSupportFragmentManager() or getFragmentManager() methods in my code. I use addition lib "sliding menu". Erorr ocured in this code

slidingMenu.setMenu(R.layout.slidingmenu);

where i call next method of slidingmenu library

public void setMenu(int res) {
    setMenu(LayoutInflater.from(getContext()).inflate(res, null));
}

My R.layout.slidingmenu file

 <?xml version="1.0" encoding="utf-8"?> 
  <fragment   
    xmlns:android="schemas.android.com/apk/res/android"
     android:name="com.example.Catholic_app.Menu.SlidingMenuFragment"
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
    android:id="@+id/slidingmenu"> </fragment>

P.s. support-library-v4 has been already added

Answer 1

To use the Fragment below the version 3.0 you have to use its Support library in your application.

You should use getSupportFragmentManager() instead of getFragmentManager()

android.support.v4.app.FragmentManager fm = getSupportFragmentManager();

For more details check HERE

To add one of the libraries to your Android project:

In your Android project, create a directory named libs at the root of your project (next to src/, res/, etc.)
Locate the JAR file for the library you want to use and copy it into the libs/ directory.

For example, the library that supports API level 4 and up is located at <sdk>/extras/android/support/v4/android-support-v4.jar.
Add the JAR to your project build path.     

Answer 2

when you create an android app you set the minimum sdk version , target sdk and compile withcheck it like that pictute!