Android學習之適配器SimpleCursorAdapter

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三.   SimpleCursorAdapter與SimpleAdapter用法相近。只是將List對象換成了Cursor對象。而且SimpleCursorAdapter類構造方法的第四個參數from表示Cursor對象中的欄位，而SimpleAdapter類構造方法的第四個參數from表示Map對象中的key.

這個執行個體主要是查詢通訊錄，實現連絡人撥號執行個體：

1.java代碼：

 1 package com.example.simplecursoradapter; 2  3 import android.app.Activity; 4 import android.content.Intent; 5 import android.database.Cursor; 6 import android.database.CursorWrapper; 7 import android.graphics.Color; 8 import android.net.Uri; 9 import android.os.Bundle;10 import android.provider.Contacts.People;11 import android.telephony.PhoneNumberUtils;12 import android.util.Log;13 import android.view.View;14 import android.widget.AdapterView;15 import android.widget.LinearLayout;16 import android.widget.ListAdapter;17 import android.widget.ListView;18 import android.widget.SimpleCursorAdapter;19 20 21 public class MainActivity extends Activity {22     private static final String TAG = "MainActivity";23     ListView listView;24     ListAdapter adapter;25 26     @Override27     public void onCreate(Bundle savedInstanceState) {28         super.onCreate(savedInstanceState);29 30         LinearLayout linearLayout = new LinearLayout(this);31         linearLayout.setOrientation(LinearLayout.VERTICAL);32 33         LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(34                 LinearLayout.LayoutParams.FILL_PARENT,35                 LinearLayout.LayoutParams.WRAP_CONTENT);36 37         listView = new ListView(this);38         linearLayout.addView(listView, param);39         this.setContentView(linearLayout);40 41         // 從資料庫擷取連絡人姓名和電話號碼42         Cursor cur = this.getContentResolver().query(People.CONTENT_URI, null,43                 null, null, null);44         adapter = new SimpleCursorAdapter(this,45                 android.R.layout.simple_list_item_2, cur, new String[] {46                         People.NAME, People.NUMBER }, new int[] {47                         android.R.id.text1, android.R.id.text2 });48         this.startManagingCursor(cur);49         listView.setAdapter(adapter);50 51         listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {52 53             public void onItemClick(AdapterView<?> arg0, View arg1,54                     int position, long arg3) {55 56                 // names=((CursorWrapper)listView.getItemAtPosition(position)).getColumnNames();57                 // 從指標的封裝類中獲得選中項的電話號碼並撥號58                 CursorWrapper wrapper = (CursorWrapper) listView59                         .getItemAtPosition(position);60                 int columnIndex = wrapper.getColumnIndex(People.NUMBER);61                 if (!wrapper.isNull(columnIndex)) {62                     String number = wrapper.getString(columnIndex);63                     Log.d(TAG, "number=" + number);64                     // 判斷電話號碼的有效性65                     if (PhoneNumberUtils.isGlobalPhoneNumber(number)) {66                         Intent intent = new Intent(Intent.ACTION_DIAL, Uri67                                 .parse("tel://" + number));68                         startActivity(intent);69                     }70                 }71             }72         });73     }74 }

記得添加許可權：

<!-- 點擊撥號時，詢問調用預設的程式還是調用本程式撥號 -->            <intent-filter>                 <action android:name="android.Intent.Action.CALL_BUTTON" />     <category android:name="android.Intent.Category.DEFAULT" />        </intent-filter><uses-permission android:name="android.permission.READ_CONTACTS" />

 

Android學習之適配器SimpleCursorAdapter