Android 作业06

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ListView
        android:id="@+id/ListView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:layout_editor_absoluteX="58dp"
        tools:layout_editor_absoluteY="220dp"
        tools:ignore="InvalidId" />
</androidx.constraintlayout.widget.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_centerVertical="true"/>

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginLeft="10dp"
        android:layout_toRightOf="@+id/ListView1" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="京东" />
</LinearLayout>

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private String[] t = { "微信", "QQ", "新浪微博", "欢乐斗地主", "天猫", "UC游览器","京东"};

    private int[] i = { R.drawable.weixin, R.drawable.qq,
            R.drawable.weibo, R.drawable.dizhu, R.drawable.tianmao,
            R.drawable.uc,R.drawable.jingdong };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ListView L = (ListView) findViewById(R.id.ListView1);

        MyBaseAdapter mAdapter = new MyBaseAdapter();

        L.setAdapter(mAdapter);
    }

    class MyBaseAdapter extends BaseAdapter {

        @Override
        public int getCount() {
            return t.length;
        }

        @Override
        public Object getItem(int position) {
            return t[position];
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View view=View.inflate(MainActivity.this, R.layout.list_item, null);
            TextView text=(TextView)view.findViewById(R.id.textView2);
            ImageView imV=(ImageView)view.findViewById(R.id.imageView);

            text.setText(t[position]);
            imV.setBackgroundResource(i[position]);

            return view;
        }
    }
}