Skip to content

Most visited

Recently visited

navigation
DirectorySelection / src / com.example.android.directoryselection /

DirectorySelectionFragment.java

1
/*
2
* Copyright 2014 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
 
17
package com.example.android.directoryselection;
18
 
19
import android.app.Activity;
20
import android.app.AlertDialog;
21
import android.content.ContentResolver;
22
import android.content.DialogInterface;
23
import android.content.Intent;
24
import android.database.Cursor;
25
import android.net.Uri;
26
import android.os.Bundle;
27
import android.provider.DocumentsContract;
28
import android.provider.DocumentsContract.Document;
29
import android.support.v4.app.Fragment;
30
import android.support.v7.widget.RecyclerView;
31
import android.util.Log;
32
import android.view.LayoutInflater;
33
import android.view.View;
34
import android.view.ViewGroup;
35
import android.widget.Button;
36
import android.widget.EditText;
37
import android.widget.TextView;
38
import android.widget.Toast;
39
 
40
import java.util.ArrayList;
41
import java.util.List;
42
 
43
/**
44
 * Fragment that demonstrates how to use Directory Selection API.
45
 */
46
public class DirectorySelectionFragment extends Fragment {
47
 
48
    private static final String TAG = DirectorySelectionFragment.class.getSimpleName();
49
 
50
    public static final int REQUEST_CODE_OPEN_DIRECTORY = 1;
51
 
52
    Uri mCurrentDirectoryUri;
53
    TextView mCurrentDirectoryTextView;
54
    Button mCreateDirectoryButton;
55
    RecyclerView mRecyclerView;
56
    DirectoryEntryAdapter mAdapter;
57
    RecyclerView.LayoutManager mLayoutManager;
58
 
59
    /**
60
     * Use this factory method to create a new instance of
61
     * this fragment using the provided parameters.
62
     *
63
     * @return A new instance of fragment {@link DirectorySelectionFragment}.
64
     */
65
    public static DirectorySelectionFragment newInstance() {
66
        DirectorySelectionFragment fragment = new DirectorySelectionFragment();
67
        return fragment;
68
    }
69
 
70
    public DirectorySelectionFragment() {
71
        // Required empty public constructor
72
    }
73
 
74
    @Override
75
    public void onCreate(Bundle savedInstanceState) {
76
        super.onCreate(savedInstanceState);
77
    }
78
 
79
    @Override
80
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
81
            Bundle savedInstanceState) {
82
        // Inflate the layout for this fragment
83
        return inflater.inflate(R.layout.fragment_directory_selection, container, false);
84
    }
85
 
86
    @Override
87
    public void onViewCreated(View rootView, Bundle savedInstanceState) {
88
        super.onViewCreated(rootView, savedInstanceState);
89
 
90
        rootView.findViewById(R.id.button_open_directory)
91
                .setOnClickListener(new View.OnClickListener() {
92
                    @Override
93
                    public void onClick(View v) {
94
                        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
95
                        startActivityForResult(intent, REQUEST_CODE_OPEN_DIRECTORY);
96
                    }
97
                });
98
 
99
        mCurrentDirectoryTextView = (TextView) rootView
100
                .findViewById(R.id.textview_current_directory);
101
        mCreateDirectoryButton = (Button) rootView.findViewById(R.id.button_create_directory);
102
        mCreateDirectoryButton.setOnClickListener(new View.OnClickListener() {
103
            @Override
104
            public void onClick(View v) {
105
                final EditText editView = new EditText(getActivity());
106
                new AlertDialog.Builder(getActivity())
107
                        .setTitle(R.string.create_directory)
108
                        .setView(editView)
109
                        .setPositiveButton(android.R.string.ok,
110
                                new DialogInterface.OnClickListener() {
111
                                    public void onClick(DialogInterface dialog, int whichButton) {
112
                                        createDirectory(mCurrentDirectoryUri,
113
                                                editView.getText().toString());
114
                                        updateDirectoryEntries(mCurrentDirectoryUri);
115
                                    }
116
                                })
117
                        .setNegativeButton(android.R.string.cancel,
118
                                new DialogInterface.OnClickListener() {
119
                                    public void onClick(DialogInterface dialog, int whichButton) {
120
                                    }
121
                                })
122
                        .show();
123
            }
124
        });
125
        mRecyclerView = (RecyclerView) rootView.findViewById(R.id.recyclerview_directory_entries);
126
        mLayoutManager = mRecyclerView.getLayoutManager();
127
        mRecyclerView.scrollToPosition(0);
128
        mAdapter = new DirectoryEntryAdapter(new ArrayList<DirectoryEntry>());
129
        mRecyclerView.setAdapter(mAdapter);
130
    }
131
 
132
    @Override
133
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
134
        super.onActivityResult(requestCode, resultCode, data);
135
        if (requestCode == REQUEST_CODE_OPEN_DIRECTORY && resultCode == Activity.RESULT_OK) {
136
            Log.d(TAG, String.format("Open Directory result Uri : %s", data.getData()));
137
            updateDirectoryEntries(data.getData());
138
            mAdapter.notifyDataSetChanged();
139
        }
140
    }
141
 
142
 
143
    /**
144
     * Updates the current directory of the uri passed as an argument and its children directories.
145
     * And updates the {@link #mRecyclerView} depending on the contents of the children.
146
     *
147
     * @param uri The uri of the current directory.
148
     */
149
    //VisibileForTesting
150
    void updateDirectoryEntries(Uri uri) {
151
        ContentResolver contentResolver = getActivity().getContentResolver();
152
        Uri docUri = DocumentsContract.buildDocumentUriUsingTree(uri,
153
                DocumentsContract.getTreeDocumentId(uri));
154
        Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(uri,
155
                DocumentsContract.getTreeDocumentId(uri));
156
 
157
        Cursor docCursor = contentResolver.query(docUri, new String[]{
158
                Document.COLUMN_DISPLAY_NAME, Document.COLUMN_MIME_TYPE}, null, null, null);
159
        try {
160
            while (docCursor.moveToNext()) {
161
                Log.d(TAG, "found doc =" + docCursor.getString(0) + ", mime=" + docCursor
162
                        .getString(1));
163
                mCurrentDirectoryUri = uri;
164
                mCurrentDirectoryTextView.setText(docCursor.getString(0));
165
                mCreateDirectoryButton.setEnabled(true);
166
            }
167
        } finally {
168
            closeQuietly(docCursor);
169
        }
170
 
171
        Cursor childCursor = contentResolver.query(childrenUri, new String[]{
172
                Document.COLUMN_DISPLAY_NAME, Document.COLUMN_MIME_TYPE}, null, null, null);
173
        try {
174
            List<DirectoryEntry> directoryEntries = new ArrayList<>();
175
            while (childCursor.moveToNext()) {
176
                Log.d(TAG, "found child=" + childCursor.getString(0) + ", mime=" + childCursor
177
                        .getString(1));
178
                DirectoryEntry entry = new DirectoryEntry();
179
                entry.fileName = childCursor.getString(0);
180
                entry.mimeType = childCursor.getString(1);
181
                directoryEntries.add(entry);
182
            }
183
            mAdapter.setDirectoryEntries(directoryEntries);
184
            mAdapter.notifyDataSetChanged();
185
        } finally {
186
            closeQuietly(childCursor);
187
        }
188
    }
189
 
190
    /**
191
     * Creates a directory under the directory represented as the uri in the argument.
192
     *
193
     * @param uri The uri of the directory under which a new directory is created.
194
     * @param directoryName The directory name of a new directory.
195
     */
196
    //VisibileForTesting
197
    void createDirectory(Uri uri, String directoryName) {
198
        ContentResolver contentResolver = getActivity().getContentResolver();
199
        Uri docUri = DocumentsContract.buildDocumentUriUsingTree(uri,
200
                DocumentsContract.getTreeDocumentId(uri));
201
        Uri directoryUri = DocumentsContract
202
                .createDocument(contentResolver, docUri, Document.MIME_TYPE_DIR, directoryName);
203
        if (directoryUri != null) {
204
            Log.i(TAG, String.format(
205
                    "Created directory : %s, Document Uri : %s, Created directory Uri : %s",
206
                    directoryName, docUri, directoryUri));
207
            Toast.makeText(getActivity(), String.format("Created a directory [%s]",
208
                    directoryName), Toast.LENGTH_SHORT).show();
209
        } else {
210
            Log.w(TAG, String.format("Failed to create a directory : %s, Uri %s", directoryName,
211
                    docUri));
212
            Toast.makeText(getActivity(), String.format("Failed to created a directory [%s] : ",
213
                    directoryName), Toast.LENGTH_SHORT).show();
214
        }
215
 
216
    }
217
 
218
    public void closeQuietly(AutoCloseable closeable) {
219
        if (closeable != null) {
220
            try {
221
                closeable.close();
222
            } catch (RuntimeException rethrown) {
223
                throw rethrown;
224
            } catch (Exception ignored) {
225
            }
226
        }
227
    }
228
}
229
 
This site uses cookies to store your preferences for site-specific language and display options.

Hooray!