Bitmapfactory.decodeStream throws FileNotFoundException

Question

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?

Please share the picName value or the code where it is initialize — Anuj J Pandey, Mar 04 '17 at 05:06
@AnujJPandey Picname is `XXgKbRiS5ogQz1euqiyRsC1ggBS2` and I even tried using `myImage` and `myImage.png`. but exception is thrown. — MrAlpha_SU, Mar 04 '17 at 05:11
@rafsanahmad007 No, is it needed for storage too? I thought it is required only for location. — MrAlpha_SU, Mar 04 '17 at 05:17
@MrunalAhirrao there should be complete path of file instead of only file name. — Anuj J Pandey, Mar 04 '17 at 05:32
@AnujJPandey but the code I am using don't return any path so which path should I add? — MrAlpha_SU, Mar 04 '17 at 05:43
Create some directory and provide entire path while saving the image, if you are using any sdk to save file then there will some method to set file path — Anuj J Pandey, Mar 04 '17 at 05:47
@Same code which I have written in question `saveFile ` and `loadBitmap` — MrAlpha_SU, Mar 04 '17 at 05:50
@AnujJPandey so using names like `XXgKbRiS5ogQz1euqiyRsC1ggBS2` would do? if I use a path? — MrAlpha_SU, Mar 04 '17 at 06:10
@AnujJPandey Now I am using this code http://stackoverflow.com/questions/17674634/saving-and-reading-bitmaps-images-from-internal-memory-in-android It gives absolute path but still the same exception is thrown! — MrAlpha_SU, Mar 04 '17 at 08:11
use runtime permission and also check it in Settings/apps/YOURAPP/permissions — Anuj J Pandey, Mar 04 '17 at 08:59
@AnujJPandey permissions are granted. And by modifying your code I think I am able to save the image because I got path in Log. But while fetching some error is taking place. — MrAlpha_SU, Mar 04 '17 at 09:01
@AnujJPandey there was no log for that error. But I was filling a bitmap ArrayList using your code and it was null so I was saying there was error. But now again `BitmapFactory FileNotFoundException` has occurred. Its quiet hard to play with images on Android it seems! — MrAlpha_SU, Mar 04 '17 at 09:53
please make sure that you are decoding the same file you saved .... — Anuj J Pandey, Mar 04 '17 at 10:37

Jd Prajapati · Answer 1 · 2017-03-04T05:29:33.480

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);
    }

score 1 · Answer 2 · answered Mar 04 '17 at 05:20

1

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

answered Mar 04 '17 at 05:20

rafsanahmad007

23,683
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The runtime permission dialog is not opening. And I have requested permission in onCreate as you suggested. – MrAlpha_SU Mar 04 '17 at 05:42
what is your target sdk in gradle? – rafsanahmad007 Mar 04 '17 at 05:52
targetSdkVersion is 23 – MrAlpha_SU Mar 04 '17 at 05:53
clear your app data and clean install the apk and run the code...the dialog should display – rafsanahmad007 Mar 04 '17 at 05:54
exception is thrown in `saveFile` or `loadBitmap` ? – rafsanahmad007 Mar 04 '17 at 05:56
Ok I will do it. And Android Studio shows error Cannot resolve symbol for this `Manifest.permission.WRITE_EXTERNAL_STORAGE` so I used `android.Manifest.permission.WRITE_EXTERNAL_STORAGE` so is it correct? – MrAlpha_SU Mar 04 '17 at 05:57
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/137195/discussion-between-rafsanahmad007-and-mrunal-ahirrao). – rafsanahmad007 Mar 04 '17 at 05:58
exception is thrown in loadBitmap – MrAlpha_SU Mar 04 '17 at 05:58

Anuj J Pandey · Answer 3 · 2017-03-04T06:18:42.877

//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;
    }

I will try using with this. So while fetching, there is no need to add "MyImages" in file path? — MrAlpha_SU, Mar 04 '17 at 08:30
Using this code while saving getting `IllegalArgumentException contains path separator` error. — MrAlpha_SU, Mar 04 '17 at 08:40

Bitmapfactory.decodeStream throws FileNotFoundException

3 Answers3