Angus Kong | 2bca210 | 2014-03-11 16:27:30 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2013 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.android.camera.data; |
| 18 | |
| 19 | import android.app.ProgressDialog; |
| 20 | import android.content.ContentValues; |
| 21 | import android.content.Context; |
| 22 | import android.os.AsyncTask; |
| 23 | import android.provider.MediaStore.Images; |
| 24 | |
| 25 | import com.android.camera.data.LocalMediaData.PhotoData; |
| 26 | import com.android.camera.debug.Log; |
| 27 | import com.android.camera.exif.ExifInterface; |
| 28 | import com.android.camera.exif.ExifTag; |
| 29 | import com.android.camera2.R; |
| 30 | |
| 31 | import java.io.File; |
| 32 | import java.io.FileNotFoundException; |
| 33 | import java.io.IOException; |
| 34 | |
| 35 | /** |
| 36 | * RotationTask can be used to rotate a {@link LocalData} by updating the exif |
| 37 | * data from jpeg file. Note that only {@link PhotoData} can be rotated. |
| 38 | */ |
| 39 | public class RotationTask extends AsyncTask<LocalData, Void, LocalData> { |
| 40 | private static final Log.Tag TAG = new Log.Tag("RotationTask"); |
| 41 | private final Context mContext; |
| 42 | private final LocalDataAdapter mAdapter; |
| 43 | private final int mCurrentDataId; |
| 44 | private final boolean mClockwise; |
| 45 | private ProgressDialog mProgress; |
| 46 | |
| 47 | public RotationTask(Context context, LocalDataAdapter adapter, |
| 48 | int currentDataId, boolean clockwise) { |
| 49 | mContext = context; |
| 50 | mAdapter = adapter; |
| 51 | mCurrentDataId = currentDataId; |
| 52 | mClockwise = clockwise; |
| 53 | } |
| 54 | |
| 55 | @Override |
| 56 | protected void onPreExecute() { |
| 57 | // Show a progress bar since the rotation could take long. |
| 58 | mProgress = new ProgressDialog(mContext); |
| 59 | int titleStringId = mClockwise ? R.string.rotate_right : R.string.rotate_left; |
| 60 | mProgress.setTitle(mContext.getString(titleStringId)); |
| 61 | mProgress.setMessage(mContext.getString(R.string.please_wait)); |
| 62 | mProgress.setCancelable(false); |
| 63 | mProgress.show(); |
| 64 | } |
| 65 | |
| 66 | @Override |
| 67 | protected LocalData doInBackground(LocalData... data) { |
| 68 | return rotateInJpegExif(data[0]); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Rotates the image by updating the exif. Done in background thread. |
| 73 | * The worst case is the whole file needed to be re-written with |
| 74 | * modified exif data. |
| 75 | * |
| 76 | * @return A new {@link LocalData} object which containing the new info. |
| 77 | */ |
| 78 | private LocalData rotateInJpegExif(LocalData data) { |
| 79 | if (!(data instanceof PhotoData)) { |
| 80 | Log.w(TAG, "Rotation can only happen on PhotoData."); |
| 81 | return null; |
| 82 | } |
| 83 | |
| 84 | PhotoData imageData = (PhotoData) data; |
| 85 | int originRotation = imageData.getRotation(); |
| 86 | int finalRotationDegrees; |
| 87 | if (mClockwise) { |
| 88 | finalRotationDegrees = (originRotation + 90) % 360; |
| 89 | } else { |
| 90 | finalRotationDegrees = (originRotation + 270) % 360; |
| 91 | } |
| 92 | |
| 93 | String filePath = imageData.getPath(); |
| 94 | ContentValues values = new ContentValues(); |
| 95 | boolean success = false; |
| 96 | int newOrientation = 0; |
| 97 | if (imageData.getMimeType().equalsIgnoreCase(LocalData.MIME_TYPE_JPEG)) { |
| 98 | ExifInterface exifInterface = new ExifInterface(); |
| 99 | ExifTag tag = exifInterface.buildTag( |
| 100 | ExifInterface.TAG_ORIENTATION, |
| 101 | ExifInterface.getOrientationValueForRotation( |
| 102 | finalRotationDegrees)); |
| 103 | if (tag != null) { |
| 104 | exifInterface.setTag(tag); |
| 105 | try { |
| 106 | // Note: This only works if the file already has some EXIF. |
| 107 | exifInterface.forceRewriteExif(filePath); |
| 108 | long fileSize = new File(filePath).length(); |
| 109 | values.put(Images.Media.SIZE, fileSize); |
| 110 | newOrientation = finalRotationDegrees; |
| 111 | success = true; |
| 112 | } catch (FileNotFoundException e) { |
| 113 | Log.w(TAG, "Cannot find file to set exif: " + filePath); |
| 114 | } catch (IOException e) { |
| 115 | Log.w(TAG, "Cannot set exif data: " + filePath); |
| 116 | } |
| 117 | } else { |
| 118 | Log.w(TAG, "Cannot build tag: " + ExifInterface.TAG_ORIENTATION); |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | PhotoData result = null; |
| 123 | if (success) { |
| 124 | // MediaStore using SQLite is thread safe. |
| 125 | values.put(Images.Media.ORIENTATION, finalRotationDegrees); |
| 126 | mContext.getContentResolver().update(imageData.getUri(), |
| 127 | values, null, null); |
| 128 | double[] latLong = data.getLatLong(); |
| 129 | double latitude = 0; |
| 130 | double longitude = 0; |
| 131 | if (latLong != null) { |
| 132 | latitude = latLong[0]; |
| 133 | longitude = latLong[1]; |
| 134 | } |
| 135 | |
| 136 | result = new PhotoData(data.getContentId(), data.getTitle(), |
| 137 | data.getMimeType(), data.getDateTaken(), data.getDateModified(), |
| 138 | data.getPath(), newOrientation, imageData.getWidth(), |
| 139 | imageData.getHeight(), data.getSizeInBytes(), latitude, longitude); |
| 140 | } |
| 141 | |
| 142 | return result; |
| 143 | } |
| 144 | |
| 145 | @Override |
| 146 | protected void onPostExecute(LocalData result) { |
| 147 | mProgress.dismiss(); |
| 148 | if (result != null) { |
| 149 | mAdapter.updateData(mCurrentDataId, result); |
| 150 | } |
| 151 | } |
| 152 | } |