Fragment切换示例-优快云博客

本文链接：https://blog.youkuaiyun.com/yongwoozzang/article/details/79620190

本文介绍了一个简单的Android应用程序，该程序演示了如何在一个Activity中通过按钮点击事件切换不同的Fragment。通过FragmentManager和FragmentTransaction管理Fragment的添加和替换。

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public class FragmentActivity extends Activity {

	List<Fragment> list = new ArrayList<Fragment>();
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_fragment);                

		list.add(new Fragment1());
		list.add(new Fragment2());
		FragmentManager fm = getFragmentManager();
        FragmentTransaction ft =fm.beginTransaction();
        for (int i = 0;i < list.size(); i++)
        	ft.add(R.id.frame, list.get(i));
        ft.commit();
		
		((Button)findViewById(R.id.btn1)).setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				FragmentManager fm = getFragmentManager();
		        FragmentTransaction ft =fm.beginTransaction();
	        	ft.replace(R.id.frame, list.get(0));
		        ft.commit();
			}
		});
		
		((Button)findViewById(R.id.btn2)).setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				FragmentManager fm = getFragmentManager();
		        FragmentTransaction ft =fm.beginTransaction();
	        	ft.replace(R.id.frame, list.get(1));
		        ft.commit();
			}
		});
	}

}

<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:orientation="vertical" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <Button
            android:id="@+id/btn1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="fragment1" />

        <Button
            android:id="@+id/btn2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="fragment2" />
    </LinearLayout>

    <FrameLayout
        android:id="@+id/frame"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </FrameLayout>

</LinearLayout>

public class Fragment1 extends Fragment{

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		View view = inflater.inflate(R.layout.layout_framgment1, null);
		
		return view;
	}
}

public class Fragment2 extends Fragment{

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		View view = inflater.inflate(R.layout.layout_framgment2, null);
		
		return view;
	}
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#5EFF00">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:text="fragment1" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#0D79FF">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentBottom="true"
        android:text="fragment2" />

</RelativeLayout>