CODEWITHSUNDEEP
android
MrAlpha_SU
MrAlpha_SU

Reputation: 331

Bitmapfactory.decodeStream throws FileNotFoundException

I am trying to save and retrieve a Bitmap from internal storage but everytime I try to load bitmap, BitMapFactory throws Exception:

BitmapFactory: Unable to decode stream: java.io.FileNotFoundException: android.graphics.Bitmap@b35e414: open failed: ENOENT (No such file or directory)

I have tried nearly all solutions given by similar threads on this website, but none worked for me. And this exception is thrown 4 times, though I am reading only one image.How?

And this is the code I am using to save and retrieve images from storage.

public static void saveFile(Context context, Bitmap b, String picName) {
    FileOutputStream fos;
    try {
        fos = context.openFileOutput(picName, Context.MODE_PRIVATE);
        b.compress(Bitmap.CompressFormat.PNG, 100, fos);
        fos.close();
    } catch (IOException e) {
        Log.e("store DRV image", e.getMessage());
        e.printStackTrace();
    }

}

public static Bitmap loadBitmap(Context context, String picName) {
    Bitmap b = null;
    FileInputStream fis;
    try {
        fis = context.openFileInput(picName);
        b = BitmapFactory.decodeStream(fis);
        fis.close();

    } catch (IOException e) {
        Log.e("get stored DRV image", e.getMessage());
        e.printStackTrace();
    }
    return b;
}

I got this code from a thread on this website, and all comments were good. But its not working for me. I have added permissions in Manifest.

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

Lastly, I am using random generated UIDs as filename. The UIDs are generated using Firebase SDK. So the UID may contain numbers or other characters like XXgKbRiS5ogQz1euqiyRsC1ggBS2. So is this a wrong way to name a file? and hence exception is thrown?

Upvotes: 1

Views: 543

Answers (3)

Anuj J Pandey
Anuj J Pandey

Reputation: 666

//Make sure permission are granted //For saving

 File file=saveFile(contex,bitmap,picName);
    //For fetching
    File dir = new File(Environment.getExternalStorageDirectory(), picName);
    BitmapFactory.decodeFile(file.getPath())

 /**
     * @param context
     * @param b
     * @param picName
     */
    public static File saveFile(Context context, Bitmap b, String picName) {
        FileOutputStream fos;
        File dir = new File(Environment.getExternalStorageDirectory(), "My Images");
        if (!dir.exists()) {
            dir.mkdirs();
        }
        File file = new File(dir, picName);
        try {
            fos = context.openFileOutput(file.getPath(), Context.MODE_PRIVATE);
            b.compress(Bitmap.CompressFormat.PNG, 100, fos);
            fos.close();
        } catch (IOException e) {
            Log.e("store DRV image", e.getMessage());
            e.printStackTrace();
        }
        return file;
    }

Upvotes: 0

Jd Prajapati
Jd Prajapati

Reputation: 1971

You need to add user permission above 6.0:

Add library:
compile 'pub.devrel:easypermissions:0.2.1'

private String[] galleryPermissions = {Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE};

if (EasyPermissions.hasPermissions(this, galleryPermissions)) {
        pickImageFromGallery();
    } else {
        EasyPermissions.requestPermissions(this, "Access for storage",
                101, galleryPermissions);
    }

Upvotes: 1

rafsanahmad007
rafsanahmad007

Reputation: 23881

Add this code in onCreate() of your Activity:

ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 0);

catch the result in same activity using:

    @Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {

        case 0: {

            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(getContext(), "Permission granted", Toast.LENGTH_SHORT).show();
                //call your method
            } else {
                Toast.makeText(getContext(), "Permission denied", Toast.LENGTH_SHORT).show();
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request
    }
 }

Learn more about Runtime Permission from HERE

Upvotes: 1

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