Fragment和FragmentActivity使用Demo

在这里用代码简单演示一下两个fragment加入到同一个activity中。

fragment相当于一个封装了的组件了，fragment里有自己的生命周期，也相当于一个Activity,区别是fragment里面重写的方法必须有：oncreate（bundle）；oncreateView();onpause();

直接上代码：

Fragment1.class

public class Fragment1 extends Fragment{
/* (non-Javadoc)
* @see android.support.v4.app.Fragment#onCreate(android.os.Bundle)
*/
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}

/* (non-Javadoc)
* @see android.support.v4.app.Fragment#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub

return inflater.inflate(R.layout.fragment1, container, false);
}

/* (non-Javadoc)
* @see android.support.v4.app.Fragment#onPause()
*/
@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
}

}

fragment1.xml

<?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:orientation="vertical" >
<Button
android:id="@+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="fragment1代码添加"/>

</LinearLayout>

第二个

Fragment2.java

public class Fragment2 extends Fragment {

/* (non-Javadoc)
* @see android.support.v4.app.Fragment#onCreate(android.os.Bundle)
*/
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}

/* (non-Javadoc)
* @see android.support.v4.app.Fragment#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment2, container, false);
}

/* (non-Javadoc)
* @see android.support.v4.app.Fragment#onPause()
*/
@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
}

}

fragmet2.xml

<?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:orientation="vertical" >
<Button
android:id="@+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="fragmentXML添加方式"/>

</LinearLayout>

装载这两个fragment的FragmentAcitivity.java

public class MainActivity extends FragmentActivity {
private Fragment1 fragment1;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragment1 = new Fragment1();
fragmentTransaction.add(R.id.linearcon, fragment1).commit();

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

Activity的布局文件：

<LinearLayout 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"
tools:context=".MainActivity" 
android:orientation="vertical">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<LinearLayout
android:id="@+id/linearcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<fragment
android:name="com.tiejiang.fragmentdemo.Fragment2"
android:id="@+id/fragment2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>

运行的结果如下：

注：这里使用import android.support.v4.app.FragmentManager;

则使用的是：FragmentManager fragmentManager = getSupportFragmentManager();

后面如果用到了其提功能的话再更新这篇吧