Android课程设计第四天ListView运用

注意：课程设计只为完成任务，不做细节描述~

效果图

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

 <RelativeLayout 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"

     tools:context=".MainActivity">

     <ListView

         android:id="@+id/listview"

         android:layout_width="match_parent"

         android:layout_height="match_parent"

         android:text="asad"

         >

     </ListView>

 </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">

    <ImageView

        android:layout_width="80dp"

        android:layout_height="80dp"

        android:id="@+id/img_ico"

        android:src="@mipmap/x2017612"/>

    <TextView

        android:layout_width="match_parent"

        android:layout_height="50dp"

        android:id="@+id/text1"

        android:layout_toRightOf="@id/img_ico"

        android:text="miemie"

        android:textSize="16sp"

        android:textColor="#0ccfff"/>

    <TextView

        android:layout_width="match_parent"

        android:layout_height="40dp"

        android:id="@+id/text2"

        android:layout_below="@id/text1"

        android:layout_alignLeft="@id/text1"

        android:text="xxxxx"

        android:textSize="16sp"

        android:textColor="#0ccfff"

        />

</RelativeLayout>

 package com.example.myapplication;

 import android.content.Context;

 import android.view.LayoutInflater;

 import android.view.View;

 import android.view.ViewGroup;

 import android.widget.BaseAdapter;

 import android.widget.ImageView;

 import android.widget.TextView;

 /**

  * Created by 樱花落舞 on 2017/6/12.

  */

 public class MyAdapter extends BaseAdapter {

     private String names[], contents[];

     private int images[];

     //上下文

     private Context context;

     public MyAdapter(String names[], String contents[], int images[],Context context) {

         this.names = names;

         this.contents = contents;

         this.images = images;

         this.context=context;

     }

     //获取列表总数

     @Override

     public int getCount() {

         return names.length;

     }

     //获取单个item

     @Override

     public Object getItem(int position) {

         return names[position];

     }

     //获取itemid

     @Override

     public long getItemId(int position) {

         return position;

     }

     //得到item视图

     @Override

     public View getView(int position, View convertView, ViewGroup parent) {

         View view = LayoutInflater.from(context).inflate(R.layout.item,null);

         ImageView image = (ImageView) view.findViewById(R.id.img_ico);

         TextView name = (TextView) view.findViewById(R.id.text1);

         TextView content = (TextView) view.findViewById(R.id.text2);

         image.setImageResource(images[position]);

         name.setText(names[position]);

         content.setText(contents[position]);

         return view;

     }

 }

 package com.example.myapplication;

 import android.support.v7.app.AppCompatActivity;

 import android.os.Bundle;

 import android.widget.ArrayAdapter;

 import android.widget.ListView;

 /*

     listview的使用

         在布局中准备控件

         在java代码中声明实例化

         准备数据源

         创建适配器

         加载适配器

  */

 public class MainActivity extends AppCompatActivity {

     //声明控件

     private ListView listView;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         listView= (ListView) findViewById(R.id.listview);

         String names[]={"xh","xhh","xhhh","xhhhh"};

         String contents[]={"Max","max","min","Min"};

         int images[]={R.mipmap.a,R.mipmap.b,R.mipmap.c,R.mipmap.d};

         MyAdapter adapter =new MyAdapter(names,contents,images,MainActivity.this);

         listView.setAdapter(adapter);

     }

 }