ListView
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package com.example.third_code;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;/** * @author HD * @date 2015-11-29 * @package_name com.example.third_code * @file_name MainActivity.java */public class MainActivity extends Activity { private List<Fruit> list = new ArrayList<Fruit>(); private FruitAdapter adapter; private ListView listView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); listView = (ListView) findViewById(R.id.listView); initFruit(); adapter = new FruitAdapter(MainActivity.this, R.layout.fruit_layout, R.id.textView, list); listView.setAdapter(adapter); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // TODO 自动生成的方法存根 Log.i("hhhd", "view.getid = " + view.getId()); Log.i("hhhd", "id is" + id); Fruit fruit = list.get(position); Toast.makeText(MainActivity.this, fruit.getName(), Toast.LENGTH_SHORT).show(); } }); } void initFruit() { Fruit Apple = new Fruit("Apple", R.drawable.ic_1); Fruit Banana = new Fruit("Banana", R.drawable.ic_2); Fruit Orange = new Fruit("Orange", R.drawable.ic_3); Fruit Watermelon = new Fruit("Watermelon", R.drawable.ic_4); Fruit Pear = new Fruit("Pear", R.drawable.ic_5); Fruit Grape = new Fruit("Grape", R.drawable.ic_6); Fruit Pineapple = new Fruit("Pineapple", R.drawable.ic_7); Fruit Strawberry = new Fruit("Strawberry", R.drawable.ic_8); Fruit Cherry = new Fruit("Cherry", R.drawable.ic_9); Fruit Mango = new Fruit("Mango", R.drawable.ic_10); Fruit pomelo = new Fruit("pomelo", R.drawable.ic_11); Fruit starfruit = new Fruit("starfruit", R.drawable.ic_12); Fruit muskmelon = new Fruit("muskmelon", R.drawable.ic_13); Fruit durian = new Fruit("durian", R.drawable.ic_14); Fruit pineapple = new Fruit("pineapple", R.drawable.ic_15); Fruit grape = new Fruit("grape", R.drawable.ic_16); Fruit Kiwifruit = new Fruit("Kiwifruit", R.drawable.ic_17); Fruit MyFruit = new Fruit("Kiwifruit", R.drawable.ic_18); list.add(Apple); list.add(Banana); list.add(Orange); list.add(Watermelon); list.add(Pear); list.add(Grape); list.add(Pineapple); list.add(Strawberry); list.add(Cherry); list.add(Mango); list.add(pomelo); list.add(starfruit); list.add(muskmelon); list.add(durian); list.add(pineapple); list.add(grape); list.add(Kiwifruit); list.add(MyFruit); } public class FruitAdapter extends ArrayAdapter<Fruit> { private int resourceId; public FruitAdapter(Context context, int resource, int textViewResourceId, List<Fruit> objects) { super(context, resource, textViewResourceId, objects); this.resourceId = resource; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO 自动生成的方法存根 View view; Fruit fruit = getItem(position); ViewHolder holder = new ViewHolder(); if (convertView == null) { view = LayoutInflater.from(getContext()).inflate(resourceId, null); holder.imageview = (ImageView) view .findViewById(R.id.imageView); holder.textView = (TextView) view.findViewById(R.id.textView); view.setTag(holder); Log.i("hhhd", "convertView isnot used"); } else { view = convertView; holder = (ViewHolder) view.getTag(); Log.i("hhhd", "convertView is used"); } holder.imageview.setImageResource(fruit.getImageResouceId()); holder.textView.setText(fruit.getName()); return view; } class ViewHolder { ImageView imageview; TextView textView; } }}
package com.example.third_code;/** * @author HD * @date 2015-11-29 * @package_name com.example.third_code * @file_name Fruit.java */public class Fruit { private String name; private int imageResouceId; public Fruit(String name, int imageResouceId) { // TODO 自动生成的构造函数存根 this.name = name; this.imageResouceId = imageResouceId; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getImageResouceId() { return imageResouceId; } public void setImageResouceId(int imageResouceId) { this.imageResouceId = imageResouceId; }}
/third_code/res/layout/activity_main.xml
<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" 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="com.example.third_code.MainActivity" > <ListView android:id="@+id/listView" android:layout_width="match_parent" android:layout_height="match_parent" > </ListView></RelativeLayout>
/third_code/res/layout/fruit_layout.xml
<?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" > <ImageView android:id="@+id/imageView" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center"/></LinearLayout>
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.third_code" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application></manifest>
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