Android(安卓)ListView 之 SimpleAdapter 一
16lz
2021-01-26
SimpleAdapter
转载请注明出处！
Activity
主程序
listItem 中存放所有要显示的所有列数据，每 new 一个map，即 在显示的列表中 新建一行数据，Title (自定义)、Image(自定义) 只是别名，分别对应 每一行的布局 item_layout 中的 资源 ID ， Title => R.id.item_text，Image=> R.id.item_image。
package com.michael.training;import java.util.ArrayList;import java.util.HashMap;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.Menu;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.Toast;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main_layout);ListView listView = (ListView)findViewById(R.id.mListView);ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>(); HashMap<String, Object> map = new HashMap<String, Object>(); map.put("Title", "NO.1开发环境搭建"); map.put("Image", R.drawable.item); listItem.add(map); map = null; map = new HashMap<String, Object>(); map.put("Title", "NO.2四大组件"); map.put("Image", R.drawable.item); listItem.add(map);SimpleAdapter listAdapter = new SimpleAdapter(this,listItem,R.layout.item_layout,new String[] {"Title", "Image"},new int[] {R.id.item_text,R.id.item_img});listView.setAdapter(listAdapter);listView.setOnItemClickListener(listener);}OnItemClickListener listener=new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {Toast.makeText(getApplicationContext(),((Integer)arg2).toString()+"-----"+((Integer)arg2).toString(), Toast.LENGTH_SHORT).show();}};@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}} main_layout.xml
主页面布局 只放了个ListView。<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/mListView" android:layout_width = "match_parent" android:layout_height = "match_parent" /></RelativeLayout>
item_layout.xml
item布局 即ListView中每一行显示的布局，我定义了一个图片和一个文本。<? xml version = "1.0" encoding = "utf-8" ?><RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android" android:layout_width = "fill_parent" android:layout_height = "match_parent" android:layout_gravity = "center_vertical" xmlns:tools = "http://schemas.android.com/tools" tools:ignore = "HardcodedText" > <ImageView android:id = "@+id/item_img" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_alignParentTop = "true" android:layout_marginLeft = "10dp" android:src = "@drawable/item" android:contentDescription = "imageflag" /> <TextView android:id = "@+id/item_text" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_alignBottom = "@+id/item_img" android:layout_alignParentRight = "true" android:layout_alignParentTop = "true" android:layout_marginTop = "4dp" android:layout_marginLeft = "24dp" android:layout_toRightOf = "@+id/item_img" android:gravity = "center_vertical" android:text = "环境搭建" android:textStyle = "bold" /></RelativeLayout>
成果
转载请注明出处！
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