第六作业

1.1.1 xml

<?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"
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="wrap_content"/>

</LinearLayout>

1.1.2XML

<?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="horizontal">

    <LinearLayout
        android:layout_margin="18dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <ImageView
            android:id="@+id/ji"
            android:layout_width="60dp"
            android:layout_height="60dp" />

        <TextView
            android:id="@+id/Text"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center_vertical"
            android:textSize="35sp"
            android:layout_marginLeft="10dp"/>
    </LinearLayout>

</LinearLayout>

1.2.1 JAVA代码

package com.example.diwuci;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import org.w3c.dom.Text;

public class MainActivity extends AppCompatActivity {
    private ListView listView;
    private String arr[]={"京东商城","QQ","QQ斗地主","新浪微博","天猫","UC浏览器","微信"};
    private int icons[] = new int[]{R.drawable.p1, R.drawable.p2, R.drawable.p3, R.drawable.p4, R.drawable.p5, R.drawable.p6, R.drawable.p7};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView=findViewById(R.id.listView);


        MyBaseAdapter myBaseAdapter=new MyBaseAdapter();
        listView.setAdapter(myBaseAdapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast.makeText(MainActivity.this,"你点击的是第"+(position+1)+"个条目", Toast.LENGTH_SHORT).show();
            }
        });

    }
    protected class MyBaseAdapter extends BaseAdapter {
        @Override
        public int getCount() {
            return arr.length;
        }

        @Override
        public Object getItem(int position) {
            return arr[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.did,null);
            ImageView imageView=view.findViewById(R.id.ji);
            TextView textView=view.findViewById(R.id.Text);
            imageView.setBackgroundResource(icons[position]);
            textView.setText(arr[position]);
            return view;
        } }

1.2.2图片