/*
* Copyright (C) 2008 Esmertec AG.
* Copyright (C) 2008 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 cn.edu.tsinghua.hpc.tmms.ui;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.provider.MediaStore.Images;
import android.provider.Telephony.Mms.Part;
import android.text.TextUtils;
import android.util.Config;
import android.util.Log;
import android.webkit.MimeTypeMap;
import cn.edu.tsinghua.hpc.google.tmms.pdu.PduPart;
import cn.edu.tsinghua.hpc.google.tmms.util.SqliteWrapper;
import cn.edu.tsinghua.hpc.tmms.LogTag;
import cn.edu.tsinghua.hpc.tmms.model.ImageModel;
public class UriImage {
private static final String TAG = "UriImage";
private static final boolean DEBUG = true;
private static final boolean LOCAL_LOGV = DEBUG ? Config.LOGD : Config.LOGV;
private final Context mContext;
private final Uri mUri;
private String mContentType;
private String mPath;
private String mSrc;
private int mWidth;
private int mHeight;
public UriImage(Context context, Uri uri) {
if ((null == context) || (null == uri)) {
throw new IllegalArgumentException();
}
String scheme = uri.getScheme();
if (scheme.equals("content")) {
initFromContentUri(context, uri);
} else if (uri.getScheme().equals("file")) {
initFromFile(context, uri);
}
mSrc = mPath.substring(mPath.lastIndexOf('/') + 1);
// Some MMSCs appear to have problems with filenames
// containing a space. So just replace them with
// underscores in the name, which is typically not
// visible to the user anyway.
mSrc = mSrc.replace(' ', '_');
mContext = context;
mUri = uri;
decodeBoundsInfo();
}
private void initFromFile(Context context, Uri uri) {
mPath = uri.getPath();
MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
String extension = MimeTypeMap.getFileExtensionFromUrl(mPath);
if (TextUtils.isEmpty(extension)) {
// getMimeTypeFromExtension() doesn't handle spaces in filenames nor can it handle
// urlEncoded strings. Let's try one last time at finding the extension.
int dotPos = mPath.lastIndexOf('.');
if (0 <= dotPos) {
extension = mPath.substring(dotPos + 1);
}
}
mContentType = mimeTypeMap.getMimeTypeFromExtension(extension);
// It's ok if mContentType is null. Eventually we'll show a toast telling the
// user the picture couldn't be attached.
}
private void initFromContentUri(Context context, Uri uri) {
// Log.v(TAG, "-----initFromContentUri----"+uri);
Cursor c = SqliteWrapper.query(context, context.getContentResolver(),
uri, null, null, null, null);
if (c == null) {
throw new IllegalArgumentException(
"Query on " + uri + " returns null result.");
}
try {
if ((c.getCount() != 1) || !c.moveToFirst()) {
throw new IllegalArgumentException(
"Query on " + uri + " returns 0 or multiple rows.");
}
String filePath;
if (ImageModel.isMmsUri(uri)) {
filePath = c.getString(c.getColumnIndexOrThrow(Part.FILENAME));
if (TextUtils.isEmpty(filePath)) {
filePath = c.getString(
c.getColumnIndexOrThrow(Part._DATA));
}
mContentType = c.getString(
c.getColumnIndexOrThrow(Part.CONTENT_TYPE));
} else {
filePath = c.getString(
c.getColumnIndexOrThrow(Images.Media.DATA));
mContentType = c.getString(
c.getColumnIndexOrThrow(Images.Media.MIME_TYPE));
//add by chenqiang
// mContentType = c.getString(
// c.getColumnIndexOrThrow(Images.Media.CONTENT_TYPE));
}
mPath = filePath;
} finally {
c.close();
}
}
private void decodeBoundsInfo() {
InputStream input = null;
try {
input = mContext.getContentResolver().openInputStream(mUri);
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inJustDecodeBounds = true;
BitmapFactory.decodeStream(input, null, opt);
mWidth = opt.outWidth;
mHeight = opt.outHeight;
} catch (FileNotFoundException e) {
// Ignore
Log.e(TAG, "IOException caught while opening stream", e);
} finally {
if (null != input) {
try {
input.close();
} catch (IOException e) {
// Ignore
Log.e(TAG, "IOException caught while closing stream", e);
}
}
}
}
public String getContentType() {
return mContentType;
}
public String getSrc() {
return mSrc;
}
public int getWidth() {
return mWidth;
}
public int getHeight() {
return mHeight;
}
public PduPart getResizedImageAsPart(int widthLimit, int heightLimit, int byteLimit) {
PduPart part = new PduPart();
byte[] data = getResizedImageData(widthLimit, heightLimit, byteLimit);
if (data == null) {
if (LOCAL_LOGV) {
Log.v(TAG, "Resize image failed.");
}
return null;
}
part.setData(data);
part.setContentType(getContentType().getBytes());
String src = getSrc();
byte[] srcBytes = src.getBytes();
part.setContentLocation(srcBytes);
part.setFilename(srcBytes);
part.setContentId(src.substring(0, src.lastIndexOf(".")).getBytes());
return part;
}
private static final int NUMBER_OF_RESIZE_ATTEMPTS = 4;
private byte[] getResizedImageData(int widthLimit, int heightLimit, int byteLimit) {
int outWidth = mWidth;
int outHeight = mHeight;
int scaleFactor = 1;
while ((outWidth / scaleFactor > widthLimit) || (outHeight / scaleFactor > heightLimit)) {
scaleFactor *= 2;
}
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
Log.v(TAG, "getResizedImageData: wlimit=" + widthLimit +
", hlimit=" + heightLimit + ", sizeLimit=" + byteLimit +
", mWidth=" + mWidth + ", mHeight=" + mHeight +
", initialScaleFactor=" + scaleFactor);
}
InputStream input = null;
try {
ByteArrayOutputStream os = null;
int attempts = 1;
do {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = scaleFactor;
input = mContext.getContentResolver().openInputStream(mUri);
int quality = MessageUtils.IMAGE_COMPRESSION_QUALITY;
try {
Bitmap b = BitmapFactory.decodeStream(input, null, options);
if (b == null) {
return null;
}
if (options.outWidth > widthLimit || options.outHeight > heightLimit) {
// The decoder does not support the inSampleSize option.
// Scale the bitmap using Bitmap library.
int scaledWidth = outWidth / scaleFactor;
int scaledHeight = outHeight / scaleFactor;
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
Log.v(TAG, "getResizedImageData: retry scaling using " +
"Bitmap.createScaledBitmap: w=" + scaledWidth +
", h=" + scaledHeight);
}
b = Bitmap.createScaledBitmap(b, outWidth / scaleFactor,
outHeight / scaleFactor, false);
if (b == null) {
return null;
}
}
// Compress the image into a JPG. Start with MessageUtils.IMAGE_COMPRESSION_QUALITY.
// In case that the image byte size is still too large reduce the quality in
// proportion to the desired byte size. Should the quality fall below
// MINIMUM_IMAGE_COMPRESSION_QUALITY skip a compression attempt and we will enter
// the next round with a smaller image to start with.
os = new ByteArrayOutputStream();
b.compress(CompressFormat.JPEG, quality, os);
int jpgFileSize = os.size();
if (jpgFileSize > byteLimit) {
int reducedQuality = quality * byteLimit / jpgFileSize;
if (reducedQuality >= MessageUtils.MINIMUM_IMAGE_COMPRESSION_QUALITY) {
quality = reducedQuality;
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
Log.v(TAG, "getResizedImageData: compress(2) w/ quality=" + quality);
}
os = new ByteArrayOutputStream();
b.compress(CompressFormat.JPEG, quality, os);
}
}
} catch (java.lang.OutOfMemoryError e) {
Log.e(TAG, e.getMessage(), e);
// fall through and keep trying with a smaller scale factor.
}
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
Log.v(TAG, "attempt=" + attempts
+ " size=" + (os == null ? 0 : os.size())
+ " width=" + outWidth / scaleFactor
+ " height=" + outHeight / scaleFactor
+ " scaleFactor=" + scaleFactor
+ " quality=" + quality);
}
scaleFactor *= 2;
attempts++;
} while ((os == null || os.size() > byteLimit) && attempts < NUMBER_OF_RESIZE_ATTEMPTS);
return os == null ? null : os.toByteArray();
} catch (FileNotFoundException e) {
Log.e(TAG, e.getMessage(), e);
return null;
} finally {
if (input != null) {
try {
input.close();
} catch (IOException e) {
Log.e(TAG, e.getMessage(), e);
}
}
}
}
}