android - Creating bitmap from canvas java -

solution

thanks @chandrasekhar's suggestions issue was passing in immutable bitmap canvas constructor. solution create copy of when using bitmapfactory.decodefile();

bitmap bmp = bitmapfactory.decodefile(imageurl).copy(bitmap.config.argb_8888, true); 

so have bitmap using bitmapfactory.decodefile() , works. able create bitmap, need create canvas , things weird.

here's flow of happening. capture image, pass functiona sizes it, , saves out , returns file path. ( using phonegap cordova )

i pass url java , use saved image , manipulate in functionb

code in question:

// url image final jsonobject options = optionsarr.optjsonobject(0); string imageurl = options.optstring("image");  // create image bitmap bitmap bmp = bitmapfactory.decodefile(imageurl); bmp = bitmap.createbitmap(bmp,0,0,655,655);  /* works fine until point */  // create image canvas canvas canvas = new canvas(bmp); bitmap 1 = bitmap.createbitmap(bmp); canvas.drawbitmap(one,0,0,null); 

i receive no errors, hangs. here's kick in pants - if run function functionb first 1 works other doesn't.

i thought maybe needed flush , close first fileoutputstream, didn't seem have effect. i've tried different variable names elements, bitmaps, canvas, , fileoutputstreams.

here example of full function... note: because using phonegap / cordova returning string

public string none(jsonarray optionsarr) {      // set file path             string filepath = "";             file path = new file(environment.getexternalstoragedirectory()+"/myapp/");              // tmp.jpg store our temporary version of image             file newfilepath = new file(path, "tmp_nbb.jpg");              // create folders if needed             try{                 boolean success = false;                  if(!path.exists()){                     success = path.mkdir();                 }                 if (!success){                      log.d("none","folder not created.");                 }                 else{                     log.d("none","folder created!");                 }             }             catch (exception e){                 e.printstacktrace();             }             // url image                 final jsonobject options = optionsarr.optjsonobject(0);                 string imageurl = options.optstring("image");                  // create image bitmap                 bitmap bmp = bitmapfactory.decodefile(imageurl);                 bmp = bitmap.createbitmap(bmp,0,0,655,655);                  // create image canvas                 canvas canvas = new canvas(bmp);                 bitmap none = bitmap.createbitmap(bmp);                 canvas.drawbitmap(none,0,0,null);                  // save image                 try {                     // output stream                     fileoutputstream out = new fileoutputstream(newfilepath);                     none.compress(bitmap.compressformat.jpeg, 100, out);                      // file path                     uri uri = uri.fromfile(newfilepath);                     filepath = uri.tostring();                      try{                         out.flush();                         out.close();                          // return file path                         return filepath;                     }                     catch (exception e){                         e.printstacktrace();                     }                   } catch (exception e) {                     e.printstacktrace();                 }             return filepath;         } 

like said works first image, when attempt open image again, based on returned filepath chunks out @ create canvas line.

edit: image path using looks this: /mtn/sdcard/myapp/tmp.jpg thoughts?

bitmap 1 = bitmap.createbitmap(bmp); 

in above code bmp bitmap , creating bitmap object one bmp.

remove line , try changing

canvas.drawbitmap(one,0,0,null); 

to

canvas.drawbitmap(bmp,0,0,null);