BaseAdapter實現ListView中item上每個控制元件的獲取以及點選
阿新 • • 發佈:2019-02-07
借鑑這位大神的程式碼,自己稍微修改了一下(其實也沒改多少),把原始碼出來大家看看,剛開始學習android,有很多不懂的地方,望大家多多指教
先來一張效果圖,點選任何一個button,獲取button的值,具體動作,大家可以自行修改
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:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"> <ListView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/listView1"> </ListView> </RelativeLayout>
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" android:orientation="horizontal" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/text"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/button1" /> </LinearLayout>
MainAcitvity.java
package com.example.listview_test_1; import android.content.Context; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; public class MainActivity extends ActionBarActivity { public static final String[] s1_string=new String[]{"第一個","第二個","第三個","第四個"}; public static final String[] button_string=new String[]{"B1","B2","B3","B4"}; private ListView lv; private List<Map<String,Object>> data; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); lv=(ListView)findViewById(R.id.listView1); data=getData(); MyAdapter adapter=new MyAdapter(this); lv.setAdapter(adapter); } private List<Map<String,Object>> getData(){ List<Map<String,Object>> list=new ArrayList<Map<String, Object>>(); Map<String,Object> map; for(int i=0;i<4;i++){ map=new HashMap<String, Object>(); map.put("title",s1_string[i]); map.put("button",button_string[i]); list.add(map); } return list; } static class ViewHolder{ public TextView title; public Button button; } public class MyAdapter extends BaseAdapter{ private LayoutInflater mInflater=null; private MyAdapter(Context context){ this.mInflater=LayoutInflater.from(context); } public int getCount(){ return data.size(); } public Object getItem(int position){ return position; } public long getItemId(int position){ return position; } public View getView(int position,View convertView,ViewGroup viewGroup){ final ViewHolder viewHolder; if(convertView==null){ viewHolder=new ViewHolder(); convertView=mInflater.inflate(R.layout.layout,null);//載入佈局檔案 viewHolder.title=(TextView)convertView.findViewById(R.id.text);//佈局中的TextView viewHolder.button=(Button)convertView.findViewById(R.id.button1);//佈局中的Button convertView.setTag(viewHolder); }else { viewHolder=(ViewHolder)convertView.getTag(); } //傳入data資料 viewHolder.title.setText((String)data.get(position).get("title")); viewHolder.button.setText((String)data.get(position).get("button")); viewHolder.button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this,viewHolder.button.getText().toString(),Toast.LENGTH_SHORT).show(); } }); return convertView; } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }