ObjectBrowser.java revision 5367ab6aab2a61aaf534b18576dcdd0bca1b9681 
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.media.MtpConstants;
26import android.net.Uri;
27import android.os.Bundle;
28import android.provider.Mtp;
29import android.util.Log;
30import android.view.View;
31import android.widget.AdapterView;
32import android.widget.ImageView;
33import android.widget.ListView;
34import android.widget.ResourceCursorAdapter;
35import android.widget.TextView;
36
37 /**
38 * A list view displaying all objects within a container (folder or storage unit).
39 */
40public class ObjectBrowser extends ListActivity {
41
42    private static final String TAG = "ObjectBrowser";
43
44    private Cursor mCursor;
45    private ObjectCursorAdapter mAdapter;
46    private int mDeviceID;
47    private int mStorageID;
48    private int mObjectID;
49
50    private static final String[] OBJECT_COLUMNS =
51        new String[] { Mtp.Object._ID, Mtp.Object.NAME, Mtp.Object.FORMAT, Mtp.Object.THUMB };
52
53    static final int ID_COLUMN = 0;
54    static final int NAME_COLUMN = 1;
55    static final int FORMAT_COLUMN = 2;
56    static final int THUMB_COLUMN = 3;
57
58    @Override
59    protected void onCreate(Bundle savedInstanceState) {
60        super.onCreate(savedInstanceState);
61    }
62
63    @Override
64    protected void onResume() {
65        super.onResume();
66
67        mDeviceID = getIntent().getIntExtra("device", 0);
68        mStorageID = getIntent().getIntExtra("storage", 0);
69        mObjectID = getIntent().getIntExtra("object", 0);
70        if (mDeviceID != 0 && mStorageID != 0) {
71            Cursor c;
72            Uri uri;
73            if (mObjectID == 0) {
74                uri = Mtp.Object.getContentUriForStorageChildren(mDeviceID, mStorageID);
75            } else {
76                uri = Mtp.Object.getContentUriForObjectChildren(mDeviceID, mObjectID);
77            }
78            Log.d(TAG, "query " + uri);
79            c = getContentResolver().query(uri, OBJECT_COLUMNS, null, null, null);
80            startManagingCursor(c);
81            mCursor = c;
82
83            // Map Cursor columns to views defined in simple_list_item_1.xml
84            mAdapter = new ObjectCursorAdapter(this, c);
85            setListAdapter(mAdapter);
86        }
87    }
88
89    @Override
90    protected void onListItemClick(ListView l, View v, int position, long id) {
91        int rowID = (int)mAdapter.getItemId(position);
92        Cursor c = getContentResolver().query(
93                        Mtp.Object.getContentUri(mDeviceID, rowID),
94                        OBJECT_COLUMNS, null, null, null);
95        Log.d(TAG, "query returned " + c + " count: " + c.getCount());
96        long format = 0;
97        if (c != null && c.getCount() == 1) {
98            c.moveToFirst();
99            long rowId = c.getLong(ID_COLUMN);
100            String name = c.getString(NAME_COLUMN);
101            format = c.getLong(FORMAT_COLUMN);
102            Log.d(TAG, "rowId: " + rowId + " name: " + name + " format: " + format);
103        }
104        if (format == MtpConstants.FORMAT_JFIF) {
105            Intent intent = new Intent(this, ObjectViewer.class);
106            intent.putExtra("device", mDeviceID);
107            intent.putExtra("storage", mStorageID);
108            intent.putExtra("object",rowID);
109            startActivity(intent);
110        } else {
111            Intent intent = new Intent(this, ObjectBrowser.class);
112            intent.putExtra("device", mDeviceID);
113            intent.putExtra("storage", mStorageID);
114            intent.putExtra("object", rowID);
115            startActivity(intent);
116        }
117    }
118
119    private class ObjectCursorAdapter extends ResourceCursorAdapter {
120
121        public ObjectCursorAdapter(Context context, Cursor c) {
122            super(context, R.layout.object_list, c);
123        }
124
125        @Override
126        public void bindView(View view, Context context, Cursor cursor) {
127            ImageView thumbView = (ImageView)view.findViewById(R.id.thumbnail);
128            TextView nameView = (TextView)view.findViewById(R.id.name);
129
130            // get the thumbnail
131            byte[] thumbnail = cursor.getBlob(THUMB_COLUMN);
132            if (thumbnail != null) {
133                Bitmap bitmap = BitmapFactory.decodeByteArray(thumbnail, 0, thumbnail.length);
134                if (bitmap != null) {
135                    thumbView.setImageBitmap(bitmap);
136                }
137            }
138
139            // get the name
140            String name = cursor.getString(NAME_COLUMN);
141            if (name == null) {
142                name = "";
143            }
144            nameView.setText(name);
145        }
146    }
147}
148