Android saving Bitmap to external storage.

saveToExternalStorage.md

Source: StackOverflow

Question: How do I save Bitmap to extrenal storage in Android?

Answer:

Use this function to save your bitmap in SD card:

public void saveTempBitmap(Bitmap bitmap) {
        if (isExternalStorageWritable()) {
            saveImage(bitmap);
        }else{
        //prompt the user or do something
        }
    }

    private void saveImage(Bitmap finalBitmap) {

        String root = Environment.getExternalStorageDirectory().toString();
        File myDir = new File(root + "/saved_images");
        myDir.mkdirs();

        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        String fname = "Shutta_"+ timeStamp +".jpg";

        File file = new File(myDir, fname);
        if (file.exists()) file.delete ();
        try {
            FileOutputStream out = new FileOutputStream(file);
            finalBitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /* Checks if external storage is available for read and write */
    public boolean isExternalStorageWritable() {
        String state = Environment.getExternalStorageState();
        if (Environment.MEDIA_MOUNTED.equals(state)) {
            return true;
        }
        return false;
    }

and add this in manifest

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

EDIT: By using this line you can able to see saved images in the gallery view. [UNTESTED]

sendBroadcast(new Intent(
Intent.ACTION_MEDIA_MOUNTED,
            Uri.parse("file://" + Environment.getExternalStorageDirectory())));

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