title: Android Fragment Layout
body: <h2>i have below error when create simple fragment example.</h2>
  
  <pre><code>09-05 07:57:28.570: E/AndroidRuntime(1138): Caused by: android.app.Fragment$InstantiationException: Unable to instantiate fragment com.example.fragment_one.f_one: make sure class name exists, is public, and has an empty constructor that is public
  09-05 08:57:03.058: E/AndroidRuntime(1477): FATAL EXCEPTION: main
  09-05 08:57:03.058: E/AndroidRuntime(1477): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.fragments_one/com.example.fragments_one.MainActivity}: android.view.InflateException: Binary XML file line #5: Error inflating class fragment
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.os.Handler.dispatchMessage(Handler.java:99)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.os.Looper.loop(Looper.java:137)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.app.ActivityThread.main(ActivityThread.java:4424)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at java.lang.reflect.Method.invokeNative(Native Method)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at java.lang.reflect.Method.invoke(Method.java:511)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at dalvik.system.NativeStart.main(Native Method)
  09-05 08:57:03.058: E/AndroidRuntime(1477): Caused by: android.view.InflateException: Binary XML file line #5: Error inflating class fragment
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.app.Activity.setContentView(Activity.java:1835)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at com.example.fragments_one.MainActivity.onCreate(MainActivity.java:12)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.app.Activity.performCreate(Activity.java:4465)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     ... 11 more
  09-05 08:57:03.058: E/AndroidRuntime(1477): Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.example.fragment_one.f_one: make sure class name exists, is public, and has an empty constructor that is public
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.support.v4.app.Fragment.instantiate(Fragment.java:395)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.support.v4.app.Fragment.instantiate(Fragment.java:363)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:264)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:669)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     ... 21 more
  09-05 08:57:03.058: E/AndroidRuntime(1477): Caused by: java.lang.ClassNotFoundException: com.example.fragment_one.f_one
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     at android.support.v4.app.Fragment.instantiate(Fragment.java:385)
  09-05 08:57:03.058: E/AndroidRuntime(1477):     ... 24 more
  </code></pre>
  
  <hr>
  
  <p>Main Activity</p>
  
  <pre><code>package com.example.fragments_one;
  
  import android.os.Bundle;
  import android.support.v4.app.FragmentActivity;
  import android.view.Menu;
  
  public class MainActivity extends FragmentActivity {
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
      }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
          getMenuInflater().inflate(R.menu.activity_main, menu);
          return true;
      }
  }
  </code></pre>
  
  <p>activity_main.xml</p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent" &gt;
  
      &lt;fragment
          android:id="@+id/f_one"
          android:name="com.example.fragment_one.f_one"
          android:layout_width="0px"
          android:layout_height="match_parent"
          android:layout_weight="1" /&gt;
  
      &lt;fragment
          android:id="@+id/f_two"
          android:name="com.example.fragment_one.f_two"
          android:layout_width="0px"
          android:layout_height="match_parent"
          android:layout_weight="1" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>Fragment Layouts </p>
  
  <p>1.f_one.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="#00FF00"
      android:orientation="vertical" &gt;
  
      &lt;TextView
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:text="This is fragment #1"
          android:textColor="#000000"
          android:textSize="25sp" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>f_two.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="#FFFE00"
      android:orientation="vertical" &gt;
  
      &lt;TextView
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:text="This is fragment #2"
          android:textColor="#000000"
          android:textSize="25sp" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>my fragment Class</p>
  
  <pre><code>package com.example.fragments_one;
  
  import android.app.Fragment;
  import android.os.Bundle;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  
  public class f_one extends Fragment {
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
              Bundle savedInstanceState) {
          // ---Inflate the layout for this fragment---
          return inflater.inflate(R.layout.f_one, container, false);
      }
  }
  </code></pre>
  
  <hr>
  
  <pre><code>package com.example.fragments_one;
  
  import android.app.Fragment;
  import android.os.Bundle;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  
  
  public class f_two extends Fragment {
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
              Bundle savedInstanceState) {
          // ---Inflate the layout for this fragment---
          return inflater.inflate(R.layout.f_two, container, false);
      }
  }
  </code></pre>