在Android联系人内容提供商中显示联系人的电话号码

Question

我正在尝试编写一个程序，该程序可以在Android中显示联系人的ID，姓名和电话号码。到目前为止，联系人的Id和姓名都会显示，但联系人的号码不会显示。有人能帮助我，下面是我的程序代码：

package com.example.oghenekaroedoh.provider; 

import android.app.ListActivity; 
import android.content.CursorLoader; 
import android.database.Cursor; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.ContactsContract; 
import android.util.Log; 
import android.widget.CursorAdapter; 
import android.widget.SimpleCursorAdapter; 

public class Provider2Activity extends ListActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_provider); 

     Uri allContacts = ContactsContract.Contacts.CONTENT_URI; 

     //query string for our contacts 
     //Uri allContacts = Uri.parse("content://contacts/people"); 

     //declare our cursor 
     Cursor c; 

     String[] projection = new String[] 
       {ContactsContract.Contacts._ID, 
         ContactsContract.Contacts.DISPLAY_NAME, 
         ContactsContract.Contacts.HAS_PHONE_NUMBER}; 

     //---detect the android version 
     //---Projection, Filtering, and sorting 
     /* >>The second parameter of the managedQuery() method (third parameter for the CursorLoader class) 
      controls how many columns are returned by the query; this parameter is known as the projection 
      >>The third parameter of the managedQuery() method (fourth parameter for the CursorLoader class) 
      enable you to specify a SQL WHERE clause to filter the result of the query 
      >>The fourth parameter of the managedQuery() method (the fifth parameter for the CursorLoader class) 
      enables you to specify a SQL ORDER BY clause to sort the result of the query, either in ascending or descending order 
     * */ 
     if (android.os.Build.VERSION.SDK_INT <11) { 
      //---if the device ids running on OS before Honeycomb 
      //use the managedQuery() of the Activity class to retrieve a managed cursor 
      c = managedQuery(allContacts, projection, null, null, null); 

     } 
     else { 
      //---Honeycomb and later use the cursor loader class to retrieve managed cursor--- 
      CursorLoader cursorLoader = new CursorLoader(
        this, 
        allContacts, 
        projection, 
        null, 
        null , 
        null); 
      c = cursorLoader.loadInBackground(); 
     } 

     //create columns for the contacts display name and the column 
     String[] columns = new String[] { 
       ContactsContract.Contacts.DISPLAY_NAME, 
       ContactsContract.Contacts._ID}; 

     int[] views = new int[] {R.id.contactName, R.id.contactID}; 

     SimpleCursorAdapter adapter; 

     //detect the android version again..s 
     if (android.os.Build.VERSION.SDK_INT <11) { 
      //---if it is before Honeycomb--- 
      //use the SimpleCursorAdapter class to map the cursor to a view (like textViews imageViews e.t.c) 
      adapter = new SimpleCursorAdapter(
        this, R.layout.activity_provider, c, columns, views); 
     } 
     else { 
      //---Honeycomb and later--- 
      ////use the SimpleCursorAdapter class to map the cursor to a view (like textViews imageViews e.t.c) 
      //with an extra parameter known as CursorAdapter.FLAG_REGISTER_CURRENT_OBSERVER 
      adapter = new SimpleCursorAdapter(
        this, R.layout.activity_provider, c, columns, views, 
        CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER); 
     } 

     this.setListAdapter(adapter); 
     PrintContacts(c); 
    } 

    private void PrintContacts(Cursor c) 
    { 
     //---display the contact id and name and phone number---- 
     if (c.moveToFirst()) { 
      do{ 
       //---get the contact id and name 
       String contactID = c.getString(c.getColumnIndex(
         ContactsContract.Contacts._ID)); 
       String contactDisplayName = 
         c.getString(c.getColumnIndex(
           ContactsContract.Contacts.DISPLAY_NAME)); 
       Log.v("Content Providers", contactID + ", " + 
         contactDisplayName); 

       //---get phone number--- 
       int hasPhone = 
         c.getInt(c.getColumnIndex(
           ContactsContract.Contacts.HAS_PHONE_NUMBER)); 
       if (hasPhone == 1) { 
        Cursor phoneCursor = 
          getContentResolver().query(
            ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, 
            ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = " + 
          contactID, null, null); 
        while (phoneCursor.moveToNext()) { 
         Log.v("Content Providers", 
           phoneCursor.getString(
             phoneCursor.getColumnIndex(
               ContactsContract.CommonDataKinds.Phone.NUMBER))); 
        } 
        phoneCursor.close(); 
       } 

      } while (c.moveToNext()); 
     } 
    } 

} 

Answer 1

我得到了你的榜样加入了CustomAdapter MyClassAdapter延伸ArrayAdapter，并填充Contact的ArrayList对象工作。

import android.app.ListActivity; 
import android.content.ContentResolver; 
import android.content.Context; 
import android.content.CursorLoader; 
import android.database.Cursor; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.ContactsContract; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.TextView; 

import java.util.ArrayList; 

public class Provider2Activity extends ListActivity { 

    ArrayList<Contact> contacts; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_provider2); 

     contacts = new ArrayList<Contact>(); 

     Uri allContacts = ContactsContract.Contacts.CONTENT_URI; 

     //declare our cursor 
     Cursor c; 

     String[] projection = new String[] 
       {ContactsContract.Contacts._ID, 
         ContactsContract.Contacts.DISPLAY_NAME, 
         ContactsContract.Contacts.HAS_PHONE_NUMBER}; 


     /* >>The second parameter of the managedQuery() method (third parameter for the CursorLoader class) 
      controls how many columns are returned by the query; this parameter is known as the projection 
      >>The third parameter of the managedQuery() method (fourth parameter for the CursorLoader class) 
      enable you to specify a SQL WHERE clause to filter the result of the query 
      >>The fourth parameter of the managedQuery() method (the fifth parameter for the CursorLoader class) 
      enables you to specify a SQL ORDER BY clause to sort the result of the query, either in ascending or descending order 
     * */ 
     if (android.os.Build.VERSION.SDK_INT <11) { 
      //---if the device ids running on OS before Honeycomb 
      //use the managedQuery() of the Activity class to retrieve a managed cursor 
      c = managedQuery(allContacts, projection, null, null, null); 

     } 
     else { 
      //---Honeycomb and later use the cursor loader class to retrieve managed cursor--- 
      CursorLoader cursorLoader = new CursorLoader(
        this, 
        allContacts, 
        projection, 
        null, 
        null , 
        null); 
      c = cursorLoader.loadInBackground(); 
     } 

     PrintContacts(c); 

     MyClassAdapter adapter; 


     //detect the android version again.. 
     if (android.os.Build.VERSION.SDK_INT <11) { 
      //---if it is before Honeycomb--- 

      adapter = new MyClassAdapter(
        this, R.layout.row_line, contacts); 
     } 
     else { 
      //---Honeycomb and later--- 

      adapter = new MyClassAdapter(
        this, R.layout.row_line, contacts); 
     } 

     this.setListAdapter(adapter); 

    } 

    private void PrintContacts(Cursor c) 
    { 
     ContentResolver cr = getContentResolver(); 
     //---display the contact id and name and phone number---- 
     if (c.moveToFirst()) { 
      do{ 
       //---get the contact id and name 
       String contactID = c.getString(c.getColumnIndex(
         ContactsContract.Contacts._ID)); 
       String contactDisplayName = 
         c.getString(c.getColumnIndex(
           ContactsContract.Contacts.DISPLAY_NAME)); 
       Log.v("Content Providers", contactID + ", " + 
         contactDisplayName); 

       String contactDisplayPhone = ""; 
        //---get phone number--- 
       int hasPhone = 
         c.getInt(c.getColumnIndex(
           ContactsContract.Contacts.HAS_PHONE_NUMBER)); 
       if (hasPhone == 1) { 
        Cursor phoneCursor = 
          getContentResolver().query(
            ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, 
            ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = " + 
              contactID, null, null); 
        while (phoneCursor.moveToNext()) { 
         Log.v("Content Providers", 
           contactDisplayPhone = phoneCursor.getString(
             phoneCursor.getColumnIndex(
               ContactsContract.CommonDataKinds.Phone.NUMBER))); 
        } 
        phoneCursor.close(); 

       } 
       contacts.add(new Contact(contactDisplayName, contactID, contactDisplayPhone)); 

      } while (c.moveToNext()); 
     } 
    } 

    public class Contact{ 
     public String contactName = ""; 
     public String contactID = ""; 
     public String contactNumber = ""; 
     public Contact(String name, String id, String number){ 

      contactName = name; 
      contactID = id; 
      contactNumber = number; 
     } 
    } 

    public class MyClassAdapter extends ArrayAdapter<Contact> { 

     private class ViewHolder { 
      private TextView name; 
      private TextView id; 
      private TextView number; 
     } 

     public MyClassAdapter(Context context, int textViewResourceId, ArrayList<Contact> items) { 
      super(context, textViewResourceId, items); 
     } 

     public View getView(int position, View convertView, ViewGroup parent) { 
      ViewHolder viewHolder; 
      if (convertView == null) { 
       convertView = LayoutInflater.from(this.getContext()) 
         .inflate(R.layout.row_line, parent, false); 

       viewHolder = new ViewHolder(); 
       viewHolder.name = (TextView) convertView.findViewById(R.id.contactName); 
       viewHolder.id = (TextView) convertView.findViewById(R.id.contactID); 
       viewHolder.number = (TextView) convertView.findViewById(R.id.contactNumber); 

       convertView.setTag(viewHolder); 
      } else { 
       viewHolder = (ViewHolder) convertView.getTag(); 
      } 

      Contact item = getItem(position); 
      if (item!= null) { 
       viewHolder.name.setText(item.contactName); 
       viewHolder.id.setText(item.contactID); 
       viewHolder.number.setText(item.contactNumber); 
      } 

      return convertView; 
     } 
    } 

} 

row_line.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="wrap_content" 
    android:orientation="vertical"> 

    <TextView android:id="@+id/contactName" 
     android:textSize="16sp" 
     android:textStyle="bold" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content"/> 

    <TextView android:id="@+id/contactID" 
     android:textSize="16sp" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content"/> 

    <TextView android:id="@+id/contactNumber" 
     android:textSize="16sp" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content"/> 
</LinearLayout> 

activity_provider2.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=".Provider2Activity"> 

    <ListView 

     android:id="@android:id/list" 

     android:layout_height="wrap_content" 

     android:layout_width="match_parent"> 

    </ListView> 

</RelativeLayout>