14 Fragment的V4包的使用

• activity_main.xml：

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:paddingBottom="@dimen/activity_vertical_margin"
      android:paddingLeft="@dimen/activity_horizontal_margin"
      android:paddingRight="@dimen/activity_horizontal_margin"
      android:paddingTop="@dimen/activity_vertical_margin"
      android:id="@+id/rl_fragment_id"
      tools:context=".MainActivity" >
  </RelativeLayout>
  

• layout.xml一个fragment的填充布局:

  <?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="#00f"
      android:orientation="vertical" >
  </LinearLayout>
  

• MainActivity.java

  package com.qf.day14_fragment_demo08_v4;
  import com.qf.day14_fragment_demo08_v4.fragment.MyFragment;
  import android.os.Bundle;
  import android.app.Activity;
  import android.support.v4.app.FragmentActivity;
  import android.support.v4.app.FragmentManager;
  import android.support.v4.app.FragmentTransaction;
  import android.view.Menu;
  /**
   * 1,创建一个类  继承V4包的Fragment
   * 2,修改Activity 变成FragmentActivity
   * 3,获取管理者对象   V4 getSupportFragmentManager()  获取事务 V4
   * @author sxy
   *
   */
  public class MainActivity extends FragmentActivity {
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
          //获取Fragment的管理者
          FragmentManager manager = getSupportFragmentManager();
          //事务
          FragmentTransaction transaction = manager.beginTransaction();
          transaction.replace(R.id.rl_fragment_id, new MyFragment());
          transaction.commit();
      }
  }
  

• fragment对象:

  package com.qf.day14_fragment_demo08_v4.fragment;
  import com.qf.day14_fragment_demo08_v4.R;
  import android.os.Bundle;
  import android.support.v4.app.Fragment;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  public class MyFragment extends Fragment {
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
              Bundle savedInstanceState) {
          // TODO Auto-generated method stub
          View view = inflater.inflate(R.layout.layout, container, false);
          return  view;
      }
  }