Android Utililty Methods Bitmap Load

List of utility methods to do Bitmap Load

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Description

The list of methods to do Bitmap Load are organized into topic(s).

Method

BitmapdecodeSampledBitmapFromUrl(URL url, int reqWidth, int reqHeight)
decode Sampled Bitmap From Url 
URLConnection uc = url.openConnection();
InputStream is = new BufferedInputStream(uc.getInputStream());
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(is, null, options);
is.close();
options.inSampleSize = calculateInSampleSize(options, reqWidth,
        reqHeight);
...
BitmapdecodeSampledBitmapStreamForSize(InputStream is, int reqWidth, int reqHeight)
decode Sampled Bitmap Stream For Size 
is.mark(is.available());
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(is, null, options);
options.inSampleSize = calculateInSampleSize(options, reqWidth,
        reqHeight);
options.inJustDecodeBounds = false;
is.reset();
...
voiddownload(String url, String fileName)
Downloads file from specified URL and stores as filename mentioned as parameter, in default external storage directory. 
Bitmap bmp = getFromUrl(url);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 0, bytes);
File f = new File(Environment.getExternalStorageDirectory()
        + File.separator + fileName);
f.createNewFile();
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
...
voidfetchImage(final Context context, final String url, final BitmapFactory.Options decodeOptions, final Object cookie, final OnFetchCompleteListener callback)
Only call this method from the main (UI) thread. 
new AsyncTask<String, Void, Bitmap>() {
    @Override
    protected Bitmap doInBackground(String... params) {
        final String url = params[0];
        if (TextUtils.isEmpty(url)) {
            return null;
        File cacheFile = null;
...
voidfetchImage(final Context context, final String url, final OnFetchCompleteListener callback)
Only call this method from the main (UI) thread. 
fetchImage(context, url, null, null, callback);
BitmapgetBitmap(Resources resources, int resourceId)
Utility method to get bitmap from cache or, if not there, load it from its resource. 
Bitmap bitmap = sBitmapResourceMap.get(resourceId);
if (bitmap == null) {
    bitmap = BitmapFactory.decodeResource(resources, resourceId);
    sBitmapResourceMap.put(resourceId, bitmap);
return bitmap;
booleangetBitmap(String url, Context context, String newPicName)
get Bitmap 
Log.e(TAG, "url=" + url);
String imageName = url.substring(url.lastIndexOf("/") + 1,
        url.length());
File file = new File(Utils.getPath(ProtocolDef.SDPACKAGEIMAGE,
        ProtocolDef.INPACKAGEIMAGE), imageName);
File file2 = new File(Utils.getPath(ProtocolDef.SDPACKAGEIMAGE,
        ProtocolDef.INPACKAGEIMAGE) + newPicName);
return getNetBitmap(url, file, context, file2);
...
BitmapgetBitmapFromAsset(Context context, String strName)
get Bitmap From Asset 
AssetManager assetManager = context.getAssets();
InputStream istr;
Bitmap bitmap = null;
try {
    istr = assetManager.open(strName);
    bitmap = BitmapFactory.decodeStream(istr);
} catch (IOException e) {
    return null;
...
BitmapgetBitmapFromFile(File file)
get Bitmap From File 
FileInputStream fis;
try {
    fis = new FileInputStream(file);
} catch (Exception e) {
    FrameworkLog.e(TAG,
            "getBitmapFromFile Exception: " + e.getMessage());
    return null;
return getBitmapFromFileInputStream(fis);
BitmapgetBitmapFromFile(String filePath)
get Bitmap From File 
return getBitmapFromFile(new File(filePath));