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转载请注明出处王亟亟的大牛之路

一个类似于某电商的实现，让菜鸟们理解Activity与Fragment之间的参数是如何交互的。

包结构：
这里写图片描述

运行后的效果
这里写图片描述

分析：
左侧ListView可上下拖动，点击不同的item会影响右侧Fragment的内容。

废话不多说，上代码（详细标注）
MainActivity

public class MainActivity extends FragmentActivity implementsOnItemClickListener {/*ListView填充用*/private String[] strs = { "常用分类", "服饰内衣","宠物", "手机", "家用电器", "数码", "电脑办公","个护化妆", "图书","鞋靴" };private ListView listView;private MyAdapter adapter;private ContentFragment myFragment;/*选中的item的位数号码*/public static int mPosition;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);/*初始化*/initView();}/*** 初始化view*/private void initView() {//匹配控件listView = (ListView) findViewById(R.id.listview);//传参adapter = new MyAdapter(this, strs);listView.setAdapter(adapter);//监听事件listView.setOnItemClickListener(this);//创建MyFragment对象myFragment = new ContentFragment();FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();fragmentTransaction.replace(R.id.fragment_container, myFragment);//通过bundle传值给MyFragmentBundle bundle = new Bundle();bundle.putString(ContentFragment.TAG, strs[mPosition]);myFragment.setArguments(bundle);fragmentTransaction.commit();}@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position,long id) {//拿到当前位置mPosition = position;//即使刷新adapteradapter.notifyDataSetChanged();for (int i = 0; i < strs.length; i++) {myFragment = new ContentFragment();FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();fragmentTransaction.replace(R.id.fragment_container, myFragment);Bundle bundle = new Bundle();bundle.putString(ContentFragment.TAG, strs[position]);myFragment.setArguments(bundle);fragmentTransaction.commit();}}
}

ContentFragment

public class ContentFragment extends Fragment {public static final String TAG = "MyFragment";private String str;@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// TODO Auto-generated method stubView view = inflater.inflate(R.layout.myfragment, null);TextView tv_title = (TextView) view.findViewById(R.id.tv_title);//得到数据str = getArguments().getString(TAG);tv_title.setText(str);return view;}
}

ListView的适配器（已经做了简单的优化）

public class MyAdapter extends BaseAdapter {private Context context;private String[] strings;public static int mPosition;public MyAdapter(Context context, String[] strings){this.context =context;this.strings = strings;}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn strings.length;}@Overridepublic Object getItem(int position) {// TODO Auto-generated method stubreturn strings[position];}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ViewHolder  viewHolder=new ViewHolder();if(convertView==null){convertView = LayoutInflater.from(context).inflate(R.layout.listview_item, null);viewHolder.tv=(TextView) convertView.findViewById(R.id.tv);mPosition = position;viewHolder.tv.setText(strings[position]);if (position == MainActivity.mPosition) {convertView.setBackgroundResource(R.drawable.tongcheng_all_bg01);} else {convertView.setBackgroundColor(Color.parseColor("#f4f4f4"));}convertView.setTag(viewHolder);  }else{viewHolder = (ViewHolder) convertView.getTag();}viewHolder.tv.setText(strings[position]);if (position == MainActivity.mPosition) {convertView.setBackgroundResource(R.drawable.tongcheng_all_bg01);} else {convertView.setBackgroundColor(Color.parseColor("#f4f4f4"));}return convertView;}private static class ViewHolder{TextView tv;}
}

主布局文件：

<?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" ><View
        android:layout_width="match_parent"android:layout_height="1dp"android:background="#cdcdcd" /><TextView
        android:layout_width="match_parent"android:layout_height="40dp"android:background="#ededed"android:gravity="center"android:text="全部种类"android:textColor="#BF3EFF"android:textSize="17sp" /><LinearLayout
        android:layout_width="match_parent"android:layout_height="match_parent"android:background="#fbfbfb"android:orientation="horizontal" ><ListView
            android:id="@+id/listview"android:layout_width="0dp"android:layout_height="match_parent"android:scrollbars="none"android:layout_weight="1.0"android:background="#f4f4f4" /><FrameLayout
            android:id="@+id/fragment_container"android:layout_width="0dp"android:layout_height="match_parent"android:layout_weight="3.0" /></LinearLayout></LinearLayout>

因为，属于写给新手初步理解这2个东西的。所以没有过多解释，注释已经很细了（自认为），也适合懒鬼拿来就用。

源码地址：http://yunpan.cn/cdkX7pQSCamJM 访问密码 82c9

转载请注明出处王亟亟的大牛之路

因为，属于写给新手初步理解这2个东西的。所以没有过多解释，注释已经很细了（自认为），也适合懒鬼拿来就用。

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