Skip to content

Most visited

Recently visited

navigation
BasicContactables / src / com.example.android.basiccontactables /

ContactablesLoaderCallbacks.java

1
/*
2
 * Copyright (C) 2012 The Android Open Source Project
3
 *
4
 * Licensed under the Apache License, Version 2.0 (the "License");
5
 * you may not use this file except in compliance with the License.
6
 * You may obtain a copy of the License at
7
 *
8
 *      http://www.apache.org/licenses/LICENSE-2.0
9
 *
10
 * Unless required by applicable law or agreed to in writing, software
11
 * distributed under the License is distributed on an "AS IS" BASIS,
12
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13
 * See the License for the specific language governing permissions and
14
 * limitations under the License.
15
 */
16
package com.example.android.basiccontactables;
17
 
18
import android.app.Activity;
19
import android.app.LoaderManager;
20
import android.content.Context;
21
import android.content.CursorLoader;
22
import android.content.Loader;
23
import android.database.Cursor;
24
import android.net.Uri;
25
import android.os.Bundle;
26
import android.provider.ContactsContract.CommonDataKinds;
27
import android.util.Log;
28
import android.widget.TextView;
29
 
30
/**
31
 * Helper class to handle all the callbacks that occur when interacting with loaders.  Most of the
32
 * interesting code in this sample app will be in this file.
33
 */
34
public class ContactablesLoaderCallbacks implements LoaderManager.LoaderCallbacks<Cursor> {
35
 
36
    Context mContext;
37
 
38
    public static final String QUERY_KEY = "query";
39
 
40
    public static final String TAG = "ContactablesLoaderCallbacks";
41
 
42
    public ContactablesLoaderCallbacks(Context context) {
43
        mContext = context;
44
    }
45
 
46
    @Override
47
    public Loader<Cursor> onCreateLoader(int loaderIndex, Bundle args) {
48
        // Where the Contactables table excels is matching text queries,
49
        // not just data dumps from Contacts db.  One search term is used to query
50
        // display name, email address and phone number.  In this case, the query was extracted
51
        // from an incoming intent in the handleIntent() method, via the
52
        // intent.getStringExtra() method.
53
 
55
        String query = args.getString(QUERY_KEY);
56
        Uri uri = Uri.withAppendedPath(
57
                CommonDataKinds.Contactables.CONTENT_FILTER_URI, query);
59
 
60
 
62
        // Easy way to limit the query to contacts with phone numbers.
63
        String selection =
64
                CommonDataKinds.Contactables.HAS_PHONE_NUMBER + " = " + 1;
65
 
66
        // Sort results such that rows for the same contact stay together.
67
        String sortBy = CommonDataKinds.Contactables.LOOKUP_KEY;
68
 
69
        return new CursorLoader(
70
                mContext,  // Context
71
                uri,       // URI representing the table/resource to be queried
72
                null,      // projection - the list of columns to return.  Null means "all"
73
                selection, // selection - Which rows to return (condition rows must match)
74
                null,      // selection args - can be provided separately and subbed into selection.
75
                sortBy);   // string specifying sort order
77
    }
78
 
79
    @Override
80
    public void onLoadFinished(Loader<Cursor> arg0, Cursor cursor) {
81
        TextView tv  = (TextView) ((Activity)mContext).findViewById(R.id.sample_output);
82
        if(tv == null) {
83
            Log.e(TAG, "TextView is null?!");
84
        } else if (mContext == null) {
85
            Log.e(TAG, "Context is null?");
86
        } else {
87
            Log.e(TAG, "Nothing is null?!");
88
        }
89
 
90
        // Reset text in case of a previous query
91
        tv.setText(mContext.getText(R.string.intro_message) + "\n\n");
92
 
93
        if (cursor.getCount() == 0) {
94
            return;
95
        }
96
 
97
        // Pulling the relevant value from the cursor requires knowing the column index to pull
98
        // it from.
100
        int phoneColumnIndex = cursor.getColumnIndex(CommonDataKinds.Phone.NUMBER);
101
        int emailColumnIndex = cursor.getColumnIndex(CommonDataKinds.Email.ADDRESS);
102
        int nameColumnIndex = cursor.getColumnIndex(CommonDataKinds.Contactables.DISPLAY_NAME);
103
        int lookupColumnIndex = cursor.getColumnIndex(CommonDataKinds.Contactables.LOOKUP_KEY);
104
        int typeColumnIndex = cursor.getColumnIndex(CommonDataKinds.Contactables.MIMETYPE);
106
 
107
        cursor.moveToFirst();
108
        // Lookup key is the easiest way to verify a row of data is for the same
109
        // contact as the previous row.
110
        String lookupKey = "";
111
        do {
113
            String currentLookupKey = cursor.getString(lookupColumnIndex);
114
            if (!lookupKey.equals(currentLookupKey)) {
115
                String displayName = cursor.getString(nameColumnIndex);
116
                tv.append(displayName + "\n");
117
                lookupKey = currentLookupKey;
118
            }
120
 
122
            // The data type can be determined using the mime type column.
123
            String mimeType = cursor.getString(typeColumnIndex);
124
            if (mimeType.equals(CommonDataKinds.Phone.CONTENT_ITEM_TYPE)) {
125
                tv.append("\tPhone Number: " + cursor.getString(phoneColumnIndex) + "\n");
126
            } else if (mimeType.equals(CommonDataKinds.Email.CONTENT_ITEM_TYPE)) {
127
                tv.append("\tEmail Address: " + cursor.getString(emailColumnIndex) + "\n");
128
            }
130
 
131
            // Look at DDMS to see all the columns returned by a query to Contactables.
132
            // Behold, the firehose!
133
            for(String column : cursor.getColumnNames()) {
134
                Log.d(TAG, column + column + ": " +
135
                        cursor.getString(cursor.getColumnIndex(column)) + "\n");
136
            }
137
        } while (cursor.moveToNext());
138
    }
139
 
140
    @Override
141
    public void onLoaderReset(Loader<Cursor> cursorLoader) {
142
    }
143
}
This site uses cookies to store your preferences for site-specific language and display options.

Hooray!

This class requires API level or higher

This doc is hidden because your selected API level for the documentation is . You can change the documentation API level with the selector above the left navigation.

For more information about specifying the API level your app requires, read Supporting Different Platform Versions.

Take a one-minute survey?
Help us improve Android tools and documentation.