Android(安卓)ListView和Fragment结合使用,类似于某电商的实现,拿来就能用,详细标注适合新手
16lz
2021-01-25
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:
运行后的效果
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 implements OnItemClickListener { /*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; @Override protected 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MyFragment Bundle bundle = new Bundle(); bundle.putString(ContentFragment.TAG, strs[mPosition]); myFragment.setArguments(bundle); fragmentTransaction.commit(); } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //拿到当前位置 mPosition = position; //即使刷新adapter adapter.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; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View 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; } @Override public int getCount() { // TODO Auto-generated method stub return strings.length; } @Override public Object getItem(int position) { // TODO Auto-generated method stub return strings[position]; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public 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
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