ObjectBrowser.java revision 147717c2671e34e0b2aef1570bcc9498f1074a0e 
1/*
2 * Copyright (C) 2010 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
17package com.android.camerabrowser;
18
19import android.app.ListActivity;
20import android.content.Context;
21import android.content.Intent;
22import android.database.Cursor;
23import android.graphics.Bitmap;
24import android.graphics.BitmapFactory;
25import android.net.Uri;
26import android.os.Bundle;
27import android.provider.Mtp;
28import android.util.Log;
29import android.view.Menu;
30import android.view.MenuInflater;
31import android.view.MenuItem;
32import android.view.View;
33import android.widget.AdapterView;
34import android.widget.ImageView;
35import android.widget.ListView;
36import android.widget.ResourceCursorAdapter;
37import android.widget.TextView;
38import android.widget.Toast;
39
40 /**
41 * A list view displaying all objects within a container (folder or storage unit).
42 */
43public class ObjectBrowser extends ListActivity {
44
45    private static final String TAG = "ObjectBrowser";
46
47    private Cursor mCursor;
48    private ObjectCursorAdapter mAdapter;
49    private int mDeviceID;
50    private int mStorageID;
51    private int mObjectID;
52
53    private static final String[] OBJECT_COLUMNS =
54        new String[] { Mtp.Object._ID, Mtp.Object.NAME, Mtp.Object.FORMAT, Mtp.Object.THUMB };
55
56    static final int ID_COLUMN = 0;
57    static final int NAME_COLUMN = 1;
58    static final int FORMAT_COLUMN = 2;
59    static final int THUMB_COLUMN = 3;
60
61    @Override
62    protected void onCreate(Bundle savedInstanceState) {
63        super.onCreate(savedInstanceState);
64    }
65
66    @Override
67    protected void onResume() {
68        super.onResume();
69
70        mDeviceID = getIntent().getIntExtra("device", 0);
71        mStorageID = getIntent().getIntExtra("storage", 0);
72        mObjectID = getIntent().getIntExtra("object", 0);
73        if (mDeviceID != 0 && mStorageID != 0) {
74            Cursor c;
75            Uri uri;
76            if (mObjectID == 0) {
77                uri = Mtp.Object.getContentUriForStorageChildren(mDeviceID, mStorageID);
78            } else {
79                uri = Mtp.Object.getContentUriForObjectChildren(mDeviceID, mObjectID);
80            }
81            Log.d(TAG, "query " + uri);
82            c = getContentResolver().query(uri, OBJECT_COLUMNS, null, null, null);
83            startManagingCursor(c);
84            mCursor = c;
85
86            // Map Cursor columns to views defined in simple_list_item_1.xml
87            mAdapter = new ObjectCursorAdapter(this, c);
88            setListAdapter(mAdapter);
89        }
90    }
91
92    @Override
93    protected void onListItemClick(ListView l, View v, int position, long id) {
94        int rowID = (int)mAdapter.getItemId(position);
95        Cursor c = getContentResolver().query(
96                        Mtp.Object.getContentUri(mDeviceID, rowID),
97                        OBJECT_COLUMNS, null, null, null);
98        Log.d(TAG, "query returned " + c + " count: " + c.getCount());
99        long format = 0;
100        if (c != null && c.getCount() == 1) {
101            c.moveToFirst();
102            long rowId = c.getLong(ID_COLUMN);
103            String name = c.getString(NAME_COLUMN);
104            format = c.getLong(FORMAT_COLUMN);
105            Log.d(TAG, "rowId: " + rowId + " name: " + name + " format: " + format);
106        }
107        if (format == Mtp.Object.FORMAT_JFIF) {
108            Intent intent = new Intent(this, ObjectViewer.class);
109            intent.putExtra("device", mDeviceID);
110            intent.putExtra("storage", mStorageID);
111            intent.putExtra("object",rowID);
112            startActivity(intent);
113        } else {
114            Intent intent = new Intent(this, ObjectBrowser.class);
115            intent.putExtra("device", mDeviceID);
116            intent.putExtra("storage", mStorageID);
117            intent.putExtra("object", rowID);
118            startActivity(intent);
119        }
120    }
121
122    @Override
123    public boolean onCreateOptionsMenu(Menu menu) {
124        MenuInflater inflater = getMenuInflater();
125        inflater.inflate(R.menu.object_menu, menu);
126        return true;
127    }
128
129    @Override
130    public boolean onPrepareOptionsMenu(Menu menu) {
131        int position = mList.getSelectedItemPosition();
132        MenuItem item = menu.findItem(R.id.delete);
133        item.setEnabled(position != AdapterView.INVALID_POSITION);
134        return true;
135    }
136
137    @Override
138    public boolean onOptionsItemSelected(MenuItem item) {
139        switch (item.getItemId()) {
140            case R.id.delete:
141                deleteSelected();
142                return true;
143        }
144        return false;
145    }
146
147    private void deleteSelected() {
148        int position = mList.getSelectedItemPosition();
149        int rowID = (int)mAdapter.getItemId(position);
150        Uri uri = Mtp.Object.getContentUri(mDeviceID, rowID);
151
152        Log.d(TAG, "deleting " + uri);
153
154        int result = getContentResolver().delete(uri, null, null);
155        if (result > 0) {
156            Toast.makeText(this, R.string.object_deleted_message, Toast.LENGTH_SHORT).show();
157            mCursor.requery();
158        } else {
159            Toast.makeText(this, R.string.delete_failed_message, Toast.LENGTH_SHORT).show();
160        }
161    }
162
163    private class ObjectCursorAdapter extends ResourceCursorAdapter {
164
165        public ObjectCursorAdapter(Context context, Cursor c) {
166            super(context, R.layout.object_list, c);
167        }
168
169        @Override
170        public void bindView(View view, Context context, Cursor cursor) {
171            ImageView thumbView = (ImageView)view.findViewById(R.id.thumbnail);
172            TextView nameView = (TextView)view.findViewById(R.id.name);
173
174            // get the thumbnail
175            byte[] thumbnail = cursor.getBlob(THUMB_COLUMN);
176            if (thumbnail != null) {
177                Bitmap bitmap = BitmapFactory.decodeByteArray(thumbnail, 0, thumbnail.length);
178                if (bitmap != null) {
179                    thumbView.setImageBitmap(bitmap);
180                }
181            }
182
183            // get the name
184            String name = cursor.getString(NAME_COLUMN);
185            if (name == null) {
186                name = "";
187            }
188            nameView.setText(name);
189        }
190    }
191}
192