在 Android 联系人内容提供程序中显示联系人的电话号码

Question

我正在尝试编写一个程序，该程序将显示Android中联系人的ID，姓名和电话号码。到目前为止，显示联系人的ID和姓名，但不显示联系人的号码。有人可以帮助我，以下是我的程序的代码：

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

我通过

添加一个扩展ArrayAdapter的自定义适配器MyClassAdapter并填充Contact对象的ArrayList来使您的示例正常工作。

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>