Save bitmap to file function

Question

I'm trying to save a bitmap to file and a specific directly using a function I've created. It's not working. It crashes after bitmap.compress part (before here3).

    File dir = new File(filepath);      if(!dir.exists())dir.mkdirs();      File file = new File(Environment.getExternalStorageDirectory() + filepath, side + ".png");     FileOutputStream fOut = new FileOutputStream(file);      bitmap.compress(Bitmap.CompressFormat.PNG, 85, fOut);     fOut.flush();     fOut.close();      System.out.println(filepath);      bitmap.recycle();     System.gc(); 

---

Error log:

06-29 00:16:38.089: D/AndroidRuntime(3260): Shutting down VM 06-29 00:16:38.089: W/dalvikvm(3260): threadid=1: thread exiting with uncaught exception (group=0xb587f4f0) 06-29 00:16:38.089: E/AndroidRuntime(3260): FATAL EXCEPTION: main 06-29 00:16:38.089: E/AndroidRuntime(3260): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=Intent { act=android.intent.action.VIEW dat=content://org.openintents.filemanager/mimetype//mnt/sdcard/download/02977_awreckedboatintheocean_1280x1024.jpg }} to activity {com.polygonattraction.testbirds/com.polygonattraction.testbirds.functions.SelectImageSource}: java.lang.IllegalStateException: Can't compress a recycled bitmap 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2532) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:2574) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.app.ActivityThread.access$2000(ActivityThread.java:117) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:961) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.os.Handler.dispatchMessage(Handler.java:99) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.os.Looper.loop(Looper.java:130) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.app.ActivityThread.main(ActivityThread.java:3683) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at java.lang.reflect.Method.invokeNative(Native Method) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at java.lang.reflect.Method.invoke(Method.java:507) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at dalvik.system.NativeStart.main(Native Method) 06-29 00:16:38.089: E/AndroidRuntime(3260): Caused by: java.lang.IllegalStateException: Can't compress a recycled bitmap 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.graphics.Bitmap.checkRecycled(Bitmap.java:180) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.graphics.Bitmap.compress(Bitmap.java:581) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at com.polygonattraction.testbirds.functions.Functions.SaveToFile(Functions.java:144) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at com.polygonattraction.testbirds.functions.SelectImageSource.onActivityResult(SelectImageSource.java:113) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.app.Activity.dispatchActivityResult(Activity.java:3908) 06-29 00:16:38.089: E/AndroidRuntime(3260):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2528) 

Answer 1

1. You need an appropriate permission in manifest.xml:

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

2. out.flush() check the out is not null..

3. String file_path = Environment.getExternalStorageDirectory().getAbsolutePath() +                              "/PhysicsSketchpad"; File dir = new File(file_path); if(!dir.exists())     dir.mkdirs(); File file = new File(dir, "sketchpad" + pad.t_id + ".png"); FileOutputStream fOut = new FileOutputStream(file);  bmp.compress(Bitmap.CompressFormat.PNG, 85, fOut); fOut.flush(); fOut.close(); 

Answer 2

In kotlin :

private fun File.writeBitmap(bitmap: Bitmap, format: Bitmap.CompressFormat, quality: Int) {     outputStream().use { out ->         bitmap.compress(format, quality, out)         out.flush()     } } 

usage example:

File(exportDir, "map.png").writeBitmap(bitmap, Bitmap.CompressFormat.PNG, 85)