Android 之 Fragment

一  左侧标题列表

1.1  布局 left_fragment.xml

<ListView xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@android:id/list"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="@android:color/darker_gray"

    android:listSelector="@drawable/onitem_selected_bkcolor"/>

1.2  ListSelector  onitem_selected_bkcolor.xml

<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item 

        android:state_window_focused="false"

        android:drawable="@android:color/holo_green_dark"/>

    <item

        android:state_window_focused="true"

        android:drawable="@android:color/holo_green_light"/>

</selector>

1.3  自定义 ListItem 布局 代替  android.R.layout.simple_list_item_1

<?xml version="1.0" encoding="utf-8"?>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="30dp"

    android:gravity="center_vertical"

    android:paddingLeft="10dp"

    android:textColor="@android:color/black"/>

1.4  自定义 LeftFragment

package com.example.myfragments;

 

import android.app.Activity;

import android.app.ListFragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.ListView;

 

//自定义回调函数

interface onItemSeletedListener

{

    public void onItemSeleted(int position); 

}

 

public class LeftFragment extends ListFragment {

 

    onItemSeletedListener mCallback;

    

    String[] data = {"item0","item1","item2","item3","item4","item5","item6","item7","item8","item9","item10","item11","item12","item13","item14","item15","item16"}; 

    

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

            Bundle savedInstanceState) {

        // TODO 自动生成的方法存根

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

    }

 

    @Override

    public void onActivityCreated(Bundle savedInstanceState) {

        // TODO 自动生成的方法存根

        setListAdapter(new ArrayAdapter<String>(getActivity(),  

                   R.layout.listitem, data)); 

        super.onActivityCreated(savedInstanceState);

    }

 

    @Override

    public void onListItemClick(ListView l, View v, int position, long id) {

        // TODO 自动生成的方法存根

        mCallback.onItemSeleted(position);        

    }

    

    @Override

    public void onAttach(Activity activity) {

        // TODO 自动生成的方法存根

        super.onAttach(activity);

        // This makes sure that the container activity has implemented  

        // the callback interface. If not, it throws an exception  

        try {  

            mCallback = (onItemSeletedListener) activity;  

        } catch (ClassCastException e) {  

            throw new ClassCastException("必须实现 onItemSeletedListener");

        }  

    }

}

            

 

二  右侧内容展示

2.1  布局 right_fragment.xml

<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:background="@android:color/background_dark"

    android:orientation="vertical"

    tools:ignore="HardcodedText,UselessParent" >

 

    <ScrollView 

        android:scrollbars="vertical"

        android:layout_width="match_parent"

        android:layout_height="match_parent">

 

        <TextView

            android:id="@+id/textview"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:text="请选择左侧边栏 :)"

            android:textColor="@android:color/holo_orange_dark"

            android:textSize="30sp" />

 

    </ScrollView>

</LinearLayout>

2.1  自定义 RightFragment

package com.example.myfragments;

 

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TextView;

 

public class RightFragment extends Fragment {

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

            Bundle savedInstanceState) {

        // TODO 自动生成的方法存根

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

    }

    

    //更新数据

    public void update(int position)

    {

        TextView textview=(TextView)getActivity().findViewById(R.id.textview);

        textview.setText("您选择了：" + String.valueOf(position)+"\n--------------"

                +"\n大江东去浪淘尽，\n千古风流人物，\n故垒西边，\n人道是，\n三国周郎赤壁，\n乱石穿空，\n惊涛拍岸，\n卷起千堆雪，\n江山如画，\n一时多少豪杰。"

                +"\n遥想公瑾当年，\n小乔初嫁了，\n雄姿英发，\n羽扇纶巾，\n谈笑间，\n樯橹灰飞烟灭，\n故国神游，\n多情应笑我，\n早生华发，\n人间如梦，\n一樽还酹江月。");

    }

}

 

三  添加到 main_layout.xml 中，附着于 Activity 显示

3.1  布局 main_layout.xml

<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="horizontal"

    tools:ignore="DisableBaselineAlignment" >

 

    <fragment

        android:id="@+id/left_fragment"

        android:name="com.example.myfragments.LeftFragment"

        android:layout_width="70dp"

        android:layout_height="match_parent"/>

    <View 

        android:layout_width="2dp"

        android:layout_height="match_parent"

        android:background="@android:color/background_dark"/>

 

    <fragment

        android:id="@+id/right_fragment"

        android:name="com.example.myfragments.RightFragment"

        android:layout_width="wrap_content"

        android:layout_height="match_parent"/>

</LinearLayout>

3.2  MainActivity

package com.example.myfragments;

 

import android.app.Activity;

import android.os.Bundle;

import android.view.Window;

import android.view.WindowManager;

 

public class MainActivity extends Activity implements onItemSeletedListener{

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);   

        requestWindowFeature(Window.FEATURE_NO_TITLE);   

        setContentView(R.layout.main_layout);     

        

//        //添加

//        FragmentManager fragmentmanager=getFragmentManager();

//        FragmentTransaction fragmenttransaction=fragmentmanager.beginTransaction();

//        LeftFragment leftfragment=new LeftFragment();

//        fragmenttransaction.add(R.id.left_fragment, leftfragment);

//        fragmenttransaction.commit();

//        //删除

//        FragmentManager fragmentmanager=getFragmentManager();

//        FragmentTransaction fragmenttransaction=fragmentmanager.beginTransaction();

//        Fragment leftfragment=fragmentmanager.findFragmentById(R.id.left_fragment);

//        fragmenttransaction.remove(leftfragment);

//        fragmenttransaction.commit();

//        //替换

//        FragmentManager fragmentmanager=getFragmentManager();

//        FragmentTransaction fragmenttransaction=fragmentmanager.beginTransaction();

//        fragmenttransaction.replace(R.id.left_fragment, new LeftFragment());

//        fragmenttransaction.commit();

    }

 

    @Override

    public void onItemSeleted(int position) {

        RightFragment rightFragment=(RightFragment) getFragmentManager().findFragmentById(R.id.right_fragment);

        

        if(rightFragment != null)

            rightFragment.update(position);

    }

}

 

四  结果展示

      

 

    

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