Android開發（11）-利用listview控件顯示person表中的所有數據(並實現點擊觸發撥號程序)

核心代碼如下：

MainActivity.java

[java]
package com.example.lession05_dbs; 
 
import java.util.List; 
 
import android.app.Activity; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.BaseAdapter; 
import android.widget.ListView; 
import android.widget.TextView; 
import android.widget.Toast; 
 
import com.example.lession05_dbs.dao.PersonDao; 
import com.example.lession05_dbs.dao.PersonDaoImpl; 
import com.example.lession05_dbs.domain.Person; 
 
public class MainActivity extends Activity { 
 
    //listView控件  
    public ListView listView; 
    //顯示所有的用戶信息  
    public List<Person> persons; 
    //數據庫操作的對象  
    public PersonDao personDao ; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.activity_main); 
        //實例化數據庫操作對象  
        personDao = new PersonDaoImpl(MainActivity.this); 
         
        //執行查詢數據  
        persons = personDao.findAll(); 
         
        //根據id獲取控件對象  
        listView = (ListView) findViewById(R.id.lv_persons); 
        //設置顯示的數據 Adpater  
        listView.setAdapter(new PersonListAdapter()); 
         
        //listView注冊事件  
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
 
            /**
             * parent :listView
             * view 每個條目控件
             * position:條目所在的位置
             * id：行號 0 
             */ 
            @Override 
            public void onItemClick(AdapterView<?> parent, View view, 
                    int position, long id) { 
             
                 TextView tv = (TextView) view; 
                  
                // Toast.makeText(getApplicationContext(), tv.getText().toString(),Toast.LENGTH_LONG).show();  
                 
                 //獲取控件的文本  
              /*   String text = tv.getText().toString();
                 //拆分
                 String arr[] =  text.split("-");
                 //得到電話
                 String phone = arr[1];
                 //意圖
                 Intent intent = new Intent();
                 //設置動作
                 intent.setAction(Intent.ACTION_CALL);
                 //設置數據
                 intent.setData(Uri.parse("tel:"+phone));
                 //執行意圖
                 startActivity(intent);*/ 
                  
                //parent listView   
                Person p =  (Person) parent.getItemAtPosition(position); //返回值 實際就是getItem返回的值  
               /* //意圖
                 Intent intent = new Intent();
                 //設置動作
                 intent.setAction(Intent.ACTION_CALL);
                 //設置數據
                 intent.setData(Uri.parse("tel:"+p.getPhone()));
                 //執行意圖
                 startActivity(intent);
                 */ 
                // Toast.makeText(getApplicationContext(), p.getName(), Toast.LENGTH_LONG).show();  
                 
               int lid =  (int) parent.getItemIdAtPosition(position); 
                
               //   
               Toast.makeText(getApplicationContext(), lid+"", Toast.LENGTH_LONG).show(); 
                  
                  
                  
            } 
        }); 
    } 
 
    @Override 
    public 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; 
    } 
 
     
    class PersonListAdapter extends BaseAdapter{ 
 
        //告訴你有多少個條目  
        @Override 
        public int getCount() { 
            // TODO Auto-generated method stub  
            return persons.size(); 
        } 
 
        //返回這個為控件對應的數據  
        @Override 
        public Object getItem(int position) { 
            // TODO Auto-generated method stub  
            return persons.get(position); 
        } 
 
        //返回條目所在的位置  
        @Override 
        public long getItemId(int position) { 
            // TODO Auto-generated method stub  
            return position; 
        } 
 
        @Override 
        public View getView(int position, View convertView, ViewGroup parent) { 
            //創建一個顯示的控件  每個條目對應的控件  
            TextView tv = new TextView(MainActivity.this); 
            tv.setText(persons.get(position).getName()+"-"+persons.get(position).getPhone()); 
            return tv; 
        } 
         
    } 
} 

package com.example.lession05_dbs;

import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.lession05_dbs.dao.PersonDao;
import com.example.lession05_dbs.dao.PersonDaoImpl;
import com.example.lession05_dbs.domain.Person;

public class MainActivity extends Activity {

 //listView控件
 public ListView listView;
 //顯示所有的用戶信息
 public List<Person> persons;
 //數據庫操作的對象
 public PersonDao personDao ;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  //實例化數據庫操作對象
  personDao = new PersonDaoImpl(MainActivity.this);
  
  //執行查詢數據
  persons = personDao.findAll();
  
  //根據id獲取控件對象
  listView = (ListView) findViewById(R.id.lv_persons);
  //設置顯示的數據 Adpater
  listView.setAdapter(new PersonListAdapter());
  
  //listView注冊事件
  listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

   /**
    * parent :listView
    * view 每個條目控件
    * position:條目所在的位置
    * id：行號 0
    */
   @Override
   public void onItemClick(AdapterView<?> parent, View view,
     int position, long id) {
   
        TextView tv = (TextView) view;
       
       // Toast.makeText(getApplicationContext(), tv.getText().toString(),Toast.LENGTH_LONG).show();
    
        //獲取控件的文本
     /*   String text = tv.getText().toString();
        //拆分
        String arr[] =  text.split("-");
        //得到電話
        String phone = arr[1];
        //意圖
        Intent intent = new Intent();
        //設置動作
        intent.setAction(Intent.ACTION_CALL);
        //設置數據
        intent.setData(Uri.parse("tel:"+phone));
        //執行意圖
        startActivity(intent);*/
       
       //parent listView
       Person p =  (Person) parent.getItemAtPosition(position); //返回值 實際就是getItem返回的值
      /* //意圖
        Intent intent = new Intent();
        //設置動作
        intent.setAction(Intent.ACTION_CALL);
        //設置數據
        intent.setData(Uri.parse("tel:"+p.getPhone()));
        //執行意圖
        startActivity(intent);
        */
       // Toast.makeText(getApplicationContext(), p.getName(), Toast.LENGTH_LONG).show();
      
      int lid =  (int) parent.getItemIdAtPosition(position);
     
      //
      Toast.makeText(getApplicationContext(), lid+"", Toast.LENGTH_LONG).show();
       
       
       
   }
  });
 }

 @Override
 public 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;
 }

 
 class PersonListAdapter extends BaseAdapter{

  //告訴你有多少個條目
  @Override
  public int getCount() {
   // TODO Auto-generated method stub
   return persons.size();
  }

  //返回這個為控件對應的數據
  @Override
  public Object getItem(int position) {
   // TODO Auto-generated method stub
   return persons.get(position);
  }

  //返回條目所在的位置
  @Override
  public long getItemId(int position) {
   // TODO Auto-generated method stub
   return position;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
   //創建一個顯示的控件  每個條目對應的控件
      TextView tv = new TextView(MainActivity.this);
   tv.setText(persons.get(position).getName()+"-"+persons.get(position).getPhone());
   return tv;
  }
  
 }
}
注意在清單文件中添加 撥號權限：

 <uses-permission android:name="android.permission.CALL_PHONE"/>

其他實體類，接口 和實現類，參見上篇博文