@SuppressWarnings("unused")
public Bitmap getThumbnail(Uri uri, int THUMBNAIL_SIZE)
throws FileNotFoundException, IOException {
InputStream input = context.getContentResolver().openInputStream(uri);
BitmapFactory.Options onlyBoundsOptions = new BitmapFactory.Options();
onlyBoundsOptions.inJustDecodeBounds = true;
onlyBoundsOptions.inDither = true; // optional
onlyBoundsOptions.inPreferredConfig = Config.ARGB_8888; // optional
BitmapFactory.decodeStream(input, null, onlyBoundsOptions);
input.close();
if ((onlyBoundsOptions.outWidth == -1) || (onlyBoundsOptions.outHeight == -1)) return null;
int originalSize =
(onlyBoundsOptions.outHeight > onlyBoundsOptions.outWidth)
? onlyBoundsOptions.outHeight
: onlyBoundsOptions.outWidth;
double ratio = (originalSize > THUMBNAIL_SIZE) ? (originalSize / THUMBNAIL_SIZE) : 1.0;
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
bitmapOptions.inSampleSize = getPowerOfTwoForSampleRatio(ratio);
bitmapOptions.inDither = true; // optional
bitmapOptions.inPreferredConfig = Config.ARGB_8888; // optional
input = context.getContentResolver().openInputStream(uri);
Bitmap bitmap = BitmapFactory.decodeStream(input, null, bitmapOptions);
int width = bitmap.getWidth();
int height = bitmap.getHeight();
input.close();
return bitmap;
}
static {
// for the cache,
// 565 is faster to decode and display
// and we don't want to dither here because the image will be scaled down later
sBitmapOptionsCache.inPreferredConfig = Bitmap.Config.RGB_565;
sBitmapOptionsCache.inDither = false;
sBitmapOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;
sBitmapOptions.inDither = false;
}
@Override
public Image newImage(String fileName, ImageFormat format) {
Bitmap.Config config = null;
if (format == ImageFormat.RGB565) config = Bitmap.Config.RGB_565;
else if (format == ImageFormat.ARGB4444) config = Bitmap.Config.ARGB_4444;
else config = Bitmap.Config.ARGB_8888;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = config;
InputStream in = null;
Bitmap bitmap = null;
try {
in = assets.open(fileName);
bitmap = BitmapFactory.decodeStream(in, null, options);
if (bitmap == null)
throw new RuntimeException("Couldn't load bitmap from asset '" + fileName + "'");
} catch (IOException e) {
throw new RuntimeException("Couldn't load bitmap from asset '" + fileName + "'");
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
}
}
}
if (bitmap.getConfig() == Bitmap.Config.RGB_565) format = ImageFormat.RGB565;
else if (bitmap.getConfig() == Bitmap.Config.ARGB_4444) format = ImageFormat.ARGB4444;
else format = ImageFormat.ARGB8888;
return new AndroidImage(bitmap, format);
}
/**
* Make a bitmap from a given Uri, minimal side length, and maximum number of pixels. The image
* data will be read from specified pfd if it's not null, otherwise a new input stream will be
* created using specified ContentResolver.
*
* <p>Clients are allowed to pass their own BitmapFactory.Options used for bitmap decoding. A new
* BitmapFactory.Options will be created if options is null.
*/
private static Bitmap makeBitmap(
int minSideLength,
int maxNumOfPixels,
Uri uri,
ContentResolver cr,
ParcelFileDescriptor pfd,
BitmapFactory.Options options) {
Bitmap b = null;
try {
if (pfd == null) pfd = makeInputStream(uri, cr);
if (pfd == null) return null;
if (options == null) options = new BitmapFactory.Options();
FileDescriptor fd = pfd.getFileDescriptor();
options.inSampleSize = 1;
options.inJustDecodeBounds = true;
BitmapFactory.decodeFileDescriptor(fd, null, options);
if (options.mCancel || options.outWidth == -1 || options.outHeight == -1) {
return null;
}
options.inSampleSize = computeSampleSize(options, minSideLength, maxNumOfPixels);
options.inJustDecodeBounds = false;
options.inDither = false;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
b = BitmapFactory.decodeFileDescriptor(fd, null, options);
} catch (OutOfMemoryError ex) {
Log.e(TAG, "Got oom exception ", ex);
return null;
} finally {
closeSilently(pfd);
}
return b;
}
static Button load(
Context context,
int id,
int resId,
boolean landscape,
boolean is565,
Rect screen,
Rect space,
boolean forceLoad) {
final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
final String prefLayoutBase = "Controls." + (landscape ? "Landscape." : "Portrait.");
final String prefBase = prefLayoutBase + getButtonName(id) + ".";
final Button template = landscape ? landscapeToDefault.get(id) : portraitToDefault.get(id);
if (forceLoad || prefs.getBoolean(prefLayoutBase + "Draw", true)) {
float controlxscale = (float) screen.width() / (float) space.width();
float controlyscale = (float) screen.height() / (float) space.height();
final Rect finalRect =
new Rect(
prefs.getInt(prefBase + "Left", (int) (template.position.left * controlxscale)),
prefs.getInt(prefBase + "Top", (int) (template.position.top * controlyscale)),
prefs.getInt(prefBase + "Right", (int) (template.position.right * controlxscale)),
prefs.getInt(prefBase + "Bottom", (int) (template.position.bottom * controlyscale)));
final BitmapFactory.Options controlOptions = new BitmapFactory.Options();
if (is565) controlOptions.inPreferredConfig = Bitmap.Config.RGB_565;
final Bitmap originalControls =
BitmapFactory.decodeResource(context.getResources(), resId, controlOptions);
final Bitmap controls =
Bitmap.createScaledBitmap(originalControls, finalRect.width(), finalRect.height(), true);
return new Button(finalRect, id, controls);
} else return new Button(template.position, id);
}
/**
* download image from url through the Internet
*
* @param url
* @return Bitmap from http
*/
private Bitmap getImageHttp(String url) {
// try to get image from file cache
// Logger.debug(this, "Load image from network " + url);
Bitmap bitmap;
int times = 0;
while (times < IMAGE_RETRY_TIMES) {
try {
URL u = new URL(url);
HttpURLConnection conn = (HttpURLConnection) u.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream inputStream = conn.getInputStream();
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inPreferredConfig = Bitmap.Config.RGB_565;
opt.inPurgeable = true;
opt.inInputShareable = true;
InputStream is = new FlushedInputStream(inputStream);
bitmap = BitmapFactory.decodeStream(is, null, opt);
is.close();
inputStream.close();
return bitmap;
} catch (Exception e) {
Logger.w("getImageHttp=" + url + e);
times++;
}
continue;
}
return null;
} // end of downloadBitmap
public Bitmap getImageBitmap(String value) {
URL imageUrl = null;
Bitmap bitmap = null;
System.out.println("menulist_imageurl===" + value);
if (value == null) return null;
try {
imageUrl = new URL(value);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
HttpURLConnection conn = (HttpURLConnection) imageUrl.openConnection();
conn.connect();
InputStream is = conn.getInputStream();
imgis = is;
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inPreferredConfig = Bitmap.Config.RGB_565;
opt.inPurgeable = true;
opt.inInputShareable = true;
// bitmap = BitmapFactory.decodeStream(is);
bitmap = BitmapFactory.decodeStream(is, null, opt);
} catch (Exception ex) {
ex.printStackTrace();
}
return bitmap;
}
/** 从缓存中获取图片 * */
public Bitmap getImage(final String url) {
final String path = getDirectory() + "/" + convertUrlToFileName(url);
File file = new File(path);
if (file.exists()) {
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inPreferredConfig = Bitmap.Config.RGB_565;
opt.inPurgeable = true;
opt.inInputShareable = true;
// 获取资源图片
FileInputStream fis;
try {
fis = new FileInputStream(path);
Bitmap bmp = BitmapFactory.decodeStream(fis, null, opt);
if (bmp == null) {
file.delete();
} else {
updateFileTime(path);
return bmp;
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
return null;
}
private final Bitmap compress(String uri, int reqWidth, int reqHeight) {
Bitmap bitmap = null;
try {
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inJustDecodeBounds = true;
BitmapFactory.decodeFile(uri, opts);
int height = opts.outHeight;
int width = opts.outWidth;
int inSampleSize = 1;
if (width > height && width > reqWidth) {
inSampleSize = Math.round((float) width / (float) reqWidth);
} else if (height > width && height > reqHeight) {
inSampleSize = Math.round((float) height / (float) reqHeight);
}
if (inSampleSize <= 1) inSampleSize = 1;
opts.inSampleSize = inSampleSize;
opts.inJustDecodeBounds = false;
opts.inPreferredConfig = Config.RGB_565;
opts.inPurgeable = true;
opts.inInputShareable = true;
opts.inTargetDensity = getResources().getDisplayMetrics().densityDpi;
opts.inScaled = true;
opts.inTempStorage = new byte[16 * 1024];
bitmap =
BitmapFactory.decodeStream(new BufferedInputStream(new FileInputStream(uri)), null, opts);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (OutOfMemoryError e) {
e.printStackTrace();
}
return bitmap;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
TouchImageView imgDisplay;
Button btnClose;
inflater = (LayoutInflater) _activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View viewLayout = inflater.inflate(R.layout.layout_fullscreen_image, container, false);
imgDisplay = (TouchImageView) viewLayout.findViewById(R.id.imgDisplay);
btnClose = (Button) viewLayout.findViewById(R.id.btnClose);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bitmap = BitmapFactory.decodeFile(_imagePaths.get(position), options);
imgDisplay.setImageBitmap(bitmap);
// close button click event
btnClose.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
_activity.finish();
}
});
((ViewPager) container).addView(viewLayout);
return viewLayout;
}
public static Bitmap fitSizeImg(String path) {
if (path == null || path.length() < 1) return null;
File file = new File(path);
Bitmap resizeBmp = null;
BitmapFactory.Options opts = new BitmapFactory.Options();
// 数字越大读出的图片占用的heap越小 不然总是溢出
if (file.length() < 51200) { // 0-50k
opts.inSampleSize = 1;
} else if (file.length() < 102400) { // 50-100k
opts.inSampleSize = 2;
} else if (file.length() < 204800) { // 100-200k
opts.inSampleSize = 3;
} else if (file.length() < 409600) { // 200-400k
opts.inSampleSize = 4;
} else if (file.length() < 614400) { // 400-600k
opts.inSampleSize = 5;
} else if (file.length() < 819200) { // 600-800k
opts.inSampleSize = 6;
} else if (file.length() < 1048576) { // 800-1m
opts.inSampleSize = 7;
} else if (file.length() < 2097152) { // 1m-2m
opts.inSampleSize = 9;
} else {
opts.inSampleSize = 10;
}
opts.inPreferredConfig = Bitmap.Config.ARGB_8888;
resizeBmp = BitmapFactory.decodeFile(file.getPath(), opts);
return resizeBmp;
}
/**
* <根据URL下载图片,并保存到本地> <功能详细描述>
*
* @param imageURL
* @param context
* @return
* @see [类、类#方法、类#成员]
*/
public static Bitmap loadImageFromUrl(String imageURL, File file, Context context) {
Bitmap bitmap = null;
try {
URL url = new URL(imageURL);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setDoInput(true);
con.connect();
if (con.getResponseCode() == 200) {
InputStream inputStream = con.getInputStream();
FileUtil.deleteDirectory(FileSystemManager.getUserHeadPath(context, Global.getUserId()));
ByteArrayOutputStream OutputStream = new ByteArrayOutputStream();
FileOutputStream out = new FileOutputStream(file.getPath());
byte buf[] = new byte[1024 * 20];
int len = 0;
while ((len = inputStream.read(buf)) != -1) {
OutputStream.write(buf, 0, len);
}
OutputStream.flush();
OutputStream.close();
inputStream.close();
out.write(OutputStream.toByteArray());
out.close();
BitmapFactory.Options imageOptions = new BitmapFactory.Options();
imageOptions.inPreferredConfig = Bitmap.Config.RGB_565;
imageOptions.inPurgeable = true;
imageOptions.inInputShareable = true;
bitmap = BitmapFactory.decodeFile(file.getPath(), imageOptions);
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}
public static Bitmap LoadBackgroundBitmap(Context context, int id)
throws Exception, OutOfMemoryError {
Display display =
((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int displayWidth = display.getWidth();
int displayHeight = display.getHeight();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Config.RGB_565;
options.inJustDecodeBounds = true;
float widthScale = options.outWidth / displayWidth;
float heightScale = options.outHeight / displayHeight;
float scale = widthScale > heightScale ? widthScale : heightScale;
if (scale >= 8) options.inSampleSize = 8;
else if (scale >= 6) options.inSampleSize = 6;
else if (scale >= 4) options.inSampleSize = 4;
else if (scale >= 2) options.inSampleSize = 2;
else options.inSampleSize = 1;
options.inJustDecodeBounds = false;
return BitmapFactory.decodeResource(context.getResources(), id, options);
}
// 图片压缩
private Bitmap compressImageFromFile(String srcPath) {
BitmapFactory.Options newOpts = new BitmapFactory.Options();
newOpts.inJustDecodeBounds = true; // 只读边,不读内容
Bitmap bitmap = BitmapFactory.decodeFile(srcPath, newOpts);
newOpts.inJustDecodeBounds = false;
int w = newOpts.outWidth;
int h = newOpts.outHeight;
float hh = 800f; //
float ww = 480f; //
int be = 1;
if (w > h && w > ww) {
be = (int) (newOpts.outWidth / ww);
} else if (w < h && h > hh) {
be = (int) (newOpts.outHeight / hh);
}
if (be <= 0) be = 1;
newOpts.inSampleSize = be; // 设置采样率
newOpts.inPreferredConfig = Config.ARGB_8888; // 该模式是默认的,可不设
newOpts.inPurgeable = true; // 同时设置才会有效
newOpts.inInputShareable = true; // 。当系统内存不够时候图片自动被回收
bitmap = BitmapFactory.decodeFile(srcPath, newOpts);
// return compressBmpFromBmp(bitmap);//原来的方法调用了这个方法企图进行二次压缩
// 其实是无效的,大家尽管尝试
return bitmap;
}
// 同比缩放解决方案---图片按比例大小压缩方法（根据Bitmap图片压缩）
public static Bitmap compressByBitmap(
Bitmap srcBitmap, int dstWidth, int dstHeight, int sizeInKb, ScalingLogic scalingLogic) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
srcBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
int quality = 100;
while (baos.toByteArray().length / 1024
> 1024) { // 判断如果图片大于1M,进行压缩避免在生成图片（BitmapFactory.decodeStream）时溢出
baos.reset(); // 重置baos即清空baos
srcBitmap.compress(Bitmap.CompressFormat.JPEG, quality, baos); // 这里压缩quality%，把压缩后的数据存放到baos中
quality -= 10; // 每次都减少10
}
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
BitmapFactory.Options options = new BitmapFactory.Options();
// 开始读入图片，此时把options.inJustDecodeBounds 设回true了
options.inJustDecodeBounds = true;
Bitmap bitmap = BitmapFactory.decodeStream(bais, null, options);
int inSampleSize =
calculateSampleSize(options.outWidth, options.outHeight, dstWidth, dstHeight, scalingLogic);
options.inSampleSize = inSampleSize > 0 ? inSampleSize : 1; // 设置缩放比例
options.inJustDecodeBounds = false;
options.inPreferredConfig = Bitmap.Config.RGB_565;
options.inPurgeable = true;
options.inInputShareable = true;
// 重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
bais = new ByteArrayInputStream(baos.toByteArray());
bitmap = BitmapFactory.decodeStream(bais, null, options);
return compressImage(bitmap, sizeInKb); // 压缩好比例大小后再进行质量压缩
}
// if null so erreur
public ArrayList<ArticleModel> getListModel(ArrayList<Article> listes, Context context) {
ArrayList<ArticleModel> listeModel = new ArrayList<>();
try {
for (int i = 0; i < listes.size(); i++) {
File file = context.getFileStreamPath(listes.get(i).getIdArticle() + ".png");
if (file.exists()) {
Bitmap bitmap = null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
try {
bitmap = BitmapFactory.decodeStream(new FileInputStream(file), null, options);
listeModel.add(
new ArticleModel(
bitmap, listes.get(i).getTitleArticle(), listes.get(i).getContentArticle()));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
return listeModel;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static Bitmap getImageFromByte(byte[] bytes, int sampleSize) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.RGB_565;
options.inSampleSize = sampleSize;
Bitmap bm = BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
return Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight());
}
public static String get450File(String mStrPicPath) {
int angel = UtilImage.readPictureDegree(mStrPicPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
Bitmap bmp = BitmapFactory.decodeFile(mStrPicPath, options);
bmp = null;
options.inJustDecodeBounds = false;
options.inPreferredConfig = Bitmap.Config.RGB_565;
options.inPurgeable = true;
options.inInputShareable = true;
int scale = 1;
if (options.outWidth > UtilFile.BITMAP_WIDTH_SHOW)
scale = (int) (options.outWidth / UtilFile.BITMAP_WIDTH_SHOW);
options.inSampleSize = scale;
bmp = BitmapFactory.decodeFile(mStrPicPath, options);
/** 把图片旋转为正的方向 */
bmp = UtilImage.rotaingImageView(angel, bmp);
String str_dir = UtilFile.getFolderPath(UtilFile.DIR_PHOTO_CACHE);
File dir = new File(str_dir);
File filepic = new File(dir, System.currentTimeMillis() + ".jpg");
try {
bmp.compress(CompressFormat.JPEG, 100, new FileOutputStream(filepic));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
// 回收bitmap
recycleBitmap(bmp);
if (filepic != null) return filepic.toString();
return "";
}
public Bitmap loadImage(String path) throws OutOfMemoryError {
Bitmap bitsat;
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
options.inJustDecodeBounds = true;
Bitmap b = BitmapFactory.decodeFile(path, options);
options.inSampleSize = Futils.calculateInSampleSize(options, px, px);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
Bitmap bit;
if (path.startsWith("smb:/")) bit = BitmapFactory.decodeStream(new SmbFileInputStream(path));
else bit = BitmapFactory.decodeFile(path, options);
bitsat =
bit; // decodeFile(path);//.createScaledBitmap(bits,imageViewReference.get().getHeight(),imageViewReference.get().getWidth(),true);
} catch (Exception e) {
Drawable img = ContextCompat.getDrawable(mContext, R.drawable.ic_doc_image);
Bitmap img1 = ((BitmapDrawable) img).getBitmap();
bitsat = img1;
}
return bitsat;
}
public Cling(Context context) {
this(context, null, 0);
// bmp = Bitmap.createBitmap(Utils3D.getScreenWidth(), Utils3D.getScreenHeight(),
// Bitmap.Config.ARGB_8888);
// canvas = new Canvas(bmp);
grad =
new GradientDrawable( // 渐变色
Orientation.TOP_BOTTOM, new int[] {Color.BLACK, Color.WHITE});
options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.RGB_565;
src1 = new Rect();
dst1 = new Rect();
src2 = new Rect();
dst2 = new Rect();
mErasePaint = new Paint();
mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.MULTIPLY));
// mErasePaint.setColor(0xFF18b7de);
mErasePaint.setAlpha(0);
mErasePaint.setAntiAlias(true);
mErasePaint.setStyle(Paint.Style.FILL);
mErasePaint.setStrokeWidth(4);
normalPaint = new Paint();
normalPaint.setAntiAlias(true);
normalPaint.setStyle(Paint.Style.STROKE);
normalPaint.setStrokeWidth(strokeWidth);
normalPaint.setColor(strokeColor);
}
private boolean addTile() throws Exception {
if (doesTileExist(client.getTileManager().getTiles().await(), tileId)) {
return true;
}
/* Set the options */
BitmapFactory.Options options = new BitmapFactory.Options();
options.inScaled = false;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap tileIcon =
BitmapFactory.decodeResource(
getBaseContext().getResources(), R.raw.drone_designer_icon, options);
BandTile tile =
new BandTile.Builder(tileId, "Drone", tileIcon)
.setPageLayouts(createButtonLayout())
.build();
appendToUI("Button Tile is adding ...\n", 1);
if (client.getTileManager().addTile(this, tile).await()) {
appendToUI("Button Tile is added.\n", 1);
return true;
} else {
appendToUI("Unable to add button tile to the band.\n", 1);
return false;
}
}
public MediaStoreImage(Context context, String url) {
mContext = context;
mId = Long.parseLong(url.substring(PREFIX.length()));
sBitmapOptionsCache.inPreferredConfig = Bitmap.Config.RGB_565;
sBitmapOptionsCache.inDither = false;
}
private Bitmap loadResizedImage() {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
decode(options);
int scale = 1;
while (checkSize(
options.outWidth / scale > mOutputWidth, options.outHeight / scale > mOutputHeight)) {
scale++;
}
scale--;
if (scale < 1) {
scale = 1;
}
options = new BitmapFactory.Options();
options.inSampleSize = scale;
options.inPreferredConfig = Bitmap.Config.RGB_565;
options.inPurgeable = true;
options.inTempStorage = new byte[32 * 1024];
Bitmap bitmap = decode(options);
if (bitmap == null) {
return null;
}
bitmap = rotateImage(bitmap);
bitmap = scaleBitmap(bitmap);
return bitmap;
}
/**
* 通过资源id转化成Bitmap
*
* @param context
* @param resId
* @return
*/
public static Bitmap ReadBitmapById(Context context, int resId) {
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inPreferredConfig = Bitmap.Config.RGB_565;
opt.inPurgeable = true;
opt.inInputShareable = true;
InputStream is = context.getResources().openRawResource(resId);
return BitmapFactory.decodeStream(is, null, opt);
}
/**
* 有两种办法将照片加载到bitmap中：2.用照片的真实路径加载
*
* @param path 被加载的图像的路径
* @param width 加载后缩放到的目标宽度
* @param height 加载后缩放到的目标高度
* @return 加载并缩放后的位图
*/
public static Bitmap loadBitmap(String path, int width, int height) {
Bitmap mBitmap = null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888; // FaceDetecor只能读取RGB 565格式的Bitmap
Bitmap bitmap = BitmapFactory.decodeFile(path, options);
mBitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height); // 缩放位图
return mBitmap;
}
/**
* Retrieve a dithered bitmap that can be used for comparison on any density
*
* @param resources
* @param config the preferred config for the returning bitmap
* @return the {@link Bitmap} or <code>null</code>
*/
public static Bitmap getUnscaledAndDitheredBitmap(
Resources resources, int resId, Bitmap.Config config) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inDither = true;
options.inScaled = false;
options.inPreferredConfig = config;
return BitmapFactory.decodeResource(resources, resId, options);
}
/**
* * 根据资源文件获取Bitmap
*
* @param context
* @param drawableId
* @return
*/
public static Bitmap ReadBitmapById(Context context, int drawableId) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Config.ARGB_8888;
options.inInputShareable = true;
options.inPurgeable = true;
InputStream stream = context.getResources().openRawResource(drawableId);
Bitmap bitmap = BitmapFactory.decodeStream(stream, null, options);
return bitmap;
}
private Bitmap decodeBitmap(InputStream is) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inDither = true;
// Prefer the bitmap config we computed from the window parameter
options.inPreferredConfig = graphics.preferredBitmapConfig;
// Never scale bitmaps based on device parameters
options.inScaled = false;
return BitmapFactory.decodeStream(is, null, options);
}
@Test
public void decodeResource_shouldPassABitmapConfig() throws Exception {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ALPHA_8;
Bitmap bitmap =
BitmapFactory.decodeResource(
Robolectric.application.getResources(), R.drawable.an_image, options);
assertThat(bitmap.getConfig()).isEqualTo(Bitmap.Config.ALPHA_8);
}
// decodes image and scales it to reduce memory consumption
private Bitmap decodeFile(File f, String size) {
try {
// decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
FileInputStream stream1 = new FileInputStream(f);
BitmapFactory.decodeStream(stream1, null, o);
stream1.close();
int REQUIRED_SIZE = 200;
// Find the correct scale value. It should be the power of 2.
if (size.equals(SMALL)) {
REQUIRED_SIZE = SIZE_SMALL;
} else if (size.equals(LARGE)) {
REQUIRED_SIZE = SIZE_LARGE;
}
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp / 2 < REQUIRED_SIZE || height_tmp / 2 < REQUIRED_SIZE) break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
// scale=4;
// decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
if (Utils.isOsVersionHigherThenGingerbread()) {
o2.inPreferredConfig = Bitmap.Config.ARGB_8888;
} else {
o2.inPreferredConfig = Bitmap.Config.RGB_565;
}
FileInputStream stream2 = new FileInputStream(f);
Bitmap bitmap = BitmapFactory.decodeStream(stream2, null, o2);
stream2.close();
return bitmap;
} catch (FileNotFoundException e) {
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
