Android Using Fragments?

Question

I am developing application which uses fragments?Here is my problem.

11-23 15:58:16.249: E/AndroidRuntime(1952): FATAL EXCEPTION: main
11-23 15:58:16.249: E/AndroidRuntime(1952): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mocksample/com.mocksample.MockProject}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.os.Looper.loop(Looper.java:123)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.app.ActivityThread.main(ActivityThread.java:4627)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at java.lang.reflect.Method.invokeNative(Native Method)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at java.lang.reflect.Method.invoke(Method.java:521)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at dalvik.system.NativeStart.main(Native Method)
11-23 15:58:16.249: E/AndroidRuntime(1952): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.view.LayoutInflater.inflate(LayoutInflater.java:385)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.app.Activity.setContentView(Activity.java:1647)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at com.mocksample.MockProject.onCreate(MockProject.java:11)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
11-23 15:58:16.249: E/AndroidRuntime(1952):     ... 11 more
11-23 15:58:16.249: E/AndroidRuntime(1952): Caused by: java.lang.ClassNotFoundException: android.view.fragment in loader dalvik.system.PathClassLoader[/data/app/com.mocksample-2.apk]
11-23 15:58:16.249: E/AndroidRuntime(1952):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.view.LayoutInflater.createView(LayoutInflater.java:466)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.view.LayoutInflater.onCreateView(LayoutInflater.java:544)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)
11-23 15:58:16.249: E/AndroidRuntime(1952):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)

Here is my code...

public class MockProject extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

xml code..

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/titles"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    class="com.mocksample.Suggestion" />

suggestion class.

public class Suggestion extends Fragment {
}

Answer 1

Please make sure to re add the latest compatibility library from eclipse Android menu and then continue to the next steps.

Use a Fragment activity such as the one mentioned by Santhosh Shettigar

public class MockProject extends FragmentActivity{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

And also make sure that in the layoyut main.xml you have the fragment declared as:

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/titles"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    class="com.mocksample.Suggestion" />

Make sure that in your custom fragment you implement the following method

   public View onCreateView(LayoutInflater inflater, ViewGroup container, 
        Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.article_view, container, false);
    }

For additional details you can also check Google docs here.

Answer 2

Change Activity to FragmentActivity.

public class MockProject extends FragmentActivity{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

Answer 3

i hope you are using compatability package.. and also instead of class in fragment tag.. use android:name

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/titles"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:name="com.mocksample.Suggestion" />