Saving Android ImageView Bitmap

Question

So I have this weird Issue. 9/10 times it will work perfectly fine, but that 10% will not work at all.

I am trying to simply have an ImageView that I can zoom and pan. that works great- then I try to save the imageView to the phone itself. This is where MOST of the time it will work, but then sometimes it will save the image as a black screen...and not what's actually displayed on the ImageView.

Here is my code for saving the ImageView:

protected void saveZoomedImage(){

    //create ImageView Bitmap
    RelativeLayout tableContent;
    tableContent=(RelativeLayout)findViewById(R.id.imgHolder);
    tableContent.measure(MeasureSpec.makeMeasureSpec(tableContent.getLayoutParams().width, MeasureSpec.EXACTLY),
            MeasureSpec.makeMeasureSpec(tableContent.getLayoutParams().height,MeasureSpec.EXACTLY));
    tableContent.setDrawingCacheEnabled(true);
    final Bitmap screenshot = Bitmap.createBitmap(tableContent.getDrawingCache());
    tableContent.setDrawingCacheEnabled(true);

    //save file
    File folder = new File(Environment.getExternalStorageDirectory () + "/thedir");
    if(!folder.exists()){
        folder.mkdir();
    }
    String exsistingFileName=Environment.getExternalStorageDirectory().getAbsolutePath() + "/thedir";
    FileOutputStream fos = null;
    try {           
        fos = new FileOutputStream(exsistingFileName + "/image.jpg");
        screenshot.compress(Bitmap.CompressFormat.JPEG, 90, fos);
        fos.flush();
        fos.close();

    } catch (Exception e) {
        e.printStackTrace();
    }

}

it saves the file fine, but it just seems like it doesn't capture the image for some reason on a small %age of times.

Answer 1

First make sure that your app has the storage permission enabled:

Go to Device Settings>Device>Applications>Application Manager>"your app">Permissions>Enable Storage permission!

Permissions in manifest:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

So, if you want to create your own directory in your File Storage you can use somethibng like:

String myDate = getCurrentDateAndTime();
FileOutputStream outStream = null;
File sdCard = Environment.getExternalStorageDirectory();
File dir = new File(sdCard.getAbsolutePath() + "/YourFolderName");
dir.mkdirs();
String fileName = "YourFileName_"+myDate+".jpg";
File outFile = new File(dir, fileName);
outStream = new FileOutputStream(outFile);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outStream);
outStream.flush();
outStream.close();
//to refresh the gallery
Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intent.setData(Uri.fromFile(file));
sendBroadcast(intent);

}

Helper function:

private String getCurrentDateAndTime() {
Calendar c = Calendar.getInstance();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
String formattedDate = df.format(c.getTime());
return formattedDate;

Hope this helps!

Answer 2

Try this code:

public static String saveImageInExternalCacheDir(Context context, Bitmap bitmap, String myfileName) {
    String fileName = myfileName.replace(' ', '_') + getCurrentDate().toString().replace(' ', '_').replace(":", "_");
    String filePath = (context.getExternalCacheDir()).toString() + "/" + fileName + ".jpg";
    try {
        FileOutputStream fos = new FileOutputStream(new File(filePath));
        bitmap.compress(Bitmap.CompressFormat.JPEG, 85, fos);
        fos.flush();
        fos.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return filePath;
}