1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* Copyright 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.system.runtimepermissions.contacts;
import android.content.ContentProviderOperation;
import android.content.ContentResolver;
import android.content.OperationApplicationException;
import android.database.Cursor;
import android.os.Bundle;
import android.os.RemoteException;
import android.provider.ContactsContract;
import android.support.annotation.Nullable;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import com.example.android.system.runtimepermissions.R;
import java.util.ArrayList;
/**
* Displays the first contact stored on the device and contains an option to add a placeholder contact.
* <p>
* This Fragment is only used to illustrate that access to the Contacts ContentProvider API has
* been granted (or denied) as part of the runtime permissions model. It is not relevant for the
* use
* of the permissions API.
* <p>
* This fragments demonstrates a basic use case for accessing the Contacts Provider. The
* implementation is based on the training guide available here:
* https://developer.android.com/training/contacts-provider/retrieve-names.html
*/
public class ContactsFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> {
private static final String TAG = "Contacts";
/**
* Projection for the content provider query includes the id and primary name of a contact.
*/
private static final String[] PROJECTION = {ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME_PRIMARY};
/**
* Sort order for the query. Sorted by primary name in ascending order.
*/
private static final String ORDER = ContactsContract.Contacts.DISPLAY_NAME_PRIMARY + " ASC";
private static String DUMMY_CONTACT_NAME = "__DUMMY CONTACT from runtime permissions sample";
private TextView mMessageText;
/**
* Creates a new instance of a ContactsFragment.
*/
public static ContactsFragment newInstance() {
return new ContactsFragment();
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_contacts, container, false);
mMessageText = rootView.findViewById(R.id.contact_message);
// Register a listener to add a placeholder contact when a button is clicked.
Button button = rootView.findViewById(R.id.contact_add);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
insertDummyContact();
}
});
// Register a listener to display the first contact when a button is clicked.
button = rootView.findViewById(R.id.contact_load);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
loadContact();
}
});
return rootView;
}
/**
* Restart the Loader to query the Contacts content provider to display the first contact.
*/
private void loadContact() {
getLoaderManager().restartLoader(0, null, this);
}
/**
* Initialises a new {@link CursorLoader} that queries the {@link ContactsContract}.
*/
@Override
public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
return new CursorLoader(getActivity(), ContactsContract.Contacts.CONTENT_URI, PROJECTION,
null, null, ORDER);
}
/**
* Dislays either the name of the first contact or a message.
*/
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
if (cursor != null) {
final int totalCount = cursor.getCount();
if (totalCount > 0) {
cursor.moveToFirst();
String name = cursor
.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
mMessageText.setText(
getResources().getString(R.string.contacts_string, totalCount, name));
} else {
mMessageText.setText(R.string.contacts_empty);
}
}
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
mMessageText.setText(R.string.contacts_empty);
}
/**
* Accesses the Contacts content provider directly to insert a new contact.
* <p>
* The contact is called "__DUMMY ENTRY" and only contains a name.
*/
private void insertDummyContact() {
// Two operations are needed to insert a new contact.
ArrayList<ContentProviderOperation> operations = new ArrayList<ContentProviderOperation>(2);
// First, set up a new raw contact.
ContentProviderOperation.Builder op =
ContentProviderOperation.newInsert(ContactsContract.RawContacts.CONTENT_URI)
.withValue(ContactsContract.RawContacts.ACCOUNT_TYPE, null)
.withValue(ContactsContract.RawContacts.ACCOUNT_NAME, null);
operations.add(op.build());
// Next, set the name for the contact.
op = ContentProviderOperation.newInsert(ContactsContract.Data.CONTENT_URI)
.withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0)
.withValue(ContactsContract.Data.MIMETYPE,
ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE)
.withValue(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME,
DUMMY_CONTACT_NAME);
operations.add(op.build());
// Apply the operations.
ContentResolver resolver = getActivity().getContentResolver();
try {
resolver.applyBatch(ContactsContract.AUTHORITY, operations);
} catch (RemoteException | OperationApplicationException e) {
Snackbar.make(mMessageText.getRootView(), "Could not add a new contact: " +
e.getMessage(), Snackbar.LENGTH_LONG);
}
}
}
|
