博客

类CustomCountryList

package com.clx.androidtest0526;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class CustomCountryList extends ArrayAdapter{
    private String[] countryNames;
    private String[] capitalNames;
    private Integer[] imageid;
    private Activity context;

    public CustomCountryList(Activity context, String[] countryNames, String[] capitalNames, Integer[] imageid) {
        super(context, R.layout.row_item, countryNames);
        this.context = context;
        this.countryNames = countryNames;
        this.capitalNames = capitalNames;
        this.imageid = imageid;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row=convertView;
        LayoutInflater inflater = context.getLayoutInflater();
        if(convertView==null)
            row = inflater.inflate(R.layout.row_item, null, true);
        TextView textViewCountry = (TextView) row.findViewById(R.id.textViewCountry);
        TextView textViewCapital = (TextView) row.findViewById(R.id.textViewCapital);
        ImageView imageFlag = (ImageView) row.findViewById(R.id.imageViewFlag);

        textViewCountry.setText(countryNames[position]);
        textViewCapital.setText(capitalNames[position]);
        imageFlag.setImageResource(imageid[position]);

        textViewCountry.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(context, "Position =" + position, Toast.LENGTH_SHORT).show();
            }
        });

        return  row;
    }
}

MainActivity

package com.clx.androidtest0526;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Typeface;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private ListView listView;
    private String countryNames[] = {
            "India",
            "China",
            "Nepal",
            "Bhutan"
    };
    private String capitalNames[] = {
            "Delhi",
            "Beijing",
            "Kathmandu",
            "Thimphu"
    };
    private Integer imageid[] = {
            R.drawable.india,
            R.drawable.china,
            R.drawable.nepal,
            R.drawable.bhutan
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Setting header
        TextView textView = new TextView(this);
        textView.setTypeface(Typeface.DEFAULT_BOLD);
        textView.setText("List of Countries");

        ListView listView=(ListView)findViewById(R.id.list);
        listView.addHeaderView(textView);

        // For populating list data
        CustomCountryList customCountryList = new CustomCountryList(this, countryNames, capitalNames, imageid);
        listView.setAdapter(customCountryList);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
//                Toast.makeText(getApplicationContext(),"You Selected "+countryNames[position-1]+ " as Country",Toast.LENGTH_SHORT).show();
                }
        });
    }
}

res/layout下新建row_item.xml

<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
<!--rowspan：单元所占行数-->
    <ImageView
        android:layout_rowSpan="2"
        android:layout_width="80dp"
        android:layout_height="70dp"
        android:scaleType="fitXY"
        android:id="@+id/imageViewFlag"
        android:layout_row="0"
        android:layout_column="0" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_columnWeight="1"
        android:layout_marginLeft="10dp"
        android:textSize="30dp"
        android:textColor="#1E90FF"
        android:id="@+id/textViewCountry"
        android:layout_row="0"
        android:layout_column="1" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_columnWeight="1"
        android:layout_marginLeft="10dp"
        android:textSize="20dp"
        android:textColor="#4B0082"
        android:id="@+id/textViewCapital"
        android:layout_row="1"
        android:layout_column="1" />
</GridLayout>

res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">

    <ListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />

</RelativeLayout>

res/values新建dimens.xml

<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>
</resources>

res/drawable下放四个图片

india.png

china.png

nepal.png

bhutan.png

最后效果图如下图