How to save a bitmap on internal storage

Question

this is my code I and I want to save this bitmap on my internal storage  The public boolean saveImageToInternalStorage is a code from google but I don t know how to use it  when I touch button2 follow the button1 action   public class MainActivity extends Activity implements OnClickListener   Button btn  btn1  SurfaceView sv  Bitmap bitmap  Canvas canvas   Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main       btn  Button findViewById R id button1       btn1  Button findViewById R id button2       sv  SurfaceView findViewById R id surfaceView1        btn setOnClickListener this       btn1 setOnClickListener this        bitmap BitmapFactory decodeResource getResources    R drawable ic launcher       Override public void onClick View v        canvas sv getHolder   lockCanvas        if canvas  null  return      canvas drawBitmap bitmap  100  100  null       sv getHolder   unlockCanvasAndPost canvas        public boolean saveImageToInternalStorage Bitmap image         try          Use the compress method on the Bitmap object to write image to        the OutputStream     FileOutputStream fos   openFileOutput  desiredFilename png   Context MODE PRIVATE           Writing the bitmap to the output stream     image compress Bitmap CompressFormat PNG  100  fos       fos close         return true        catch  Exception e        Log e  saveToInternalStorage     e getMessage         return false

User · Answer

private static void SaveImage Bitmap finalBitmap         String root   Environment getExternalStorageDirectory   getAbsolutePath        File myDir   new File root     saved images        myDir mkdirs         String fname    Image-   o    jpg       File file   new File  myDir  fname       if  file exists     file delete         try           FileOutputStream out   new FileOutputStream file           finalBitmap compress Bitmap CompressFormat JPEG  90  out           out flush            out close           catch  Exception e            e printStackTrace

User · Answer

Modify onClick   as follows    Override public void onClick View v        if v    btn            canvas sv getHolder   lockCanvas            if canvas  null                canvas drawBitmap bitmap  100  100  null               sv getHolder   unlockCanvasAndPost canvas                   else if v    btn1            saveBitmapToInternalStorage bitmap               There are several ways to enforce that btn must be pressed before btn1 so that the bitmap is painted before you attempt to save it   I suggest that you initially disable btn1  and that you enable it when btn is clicked  like this   if v    btn                btn1 setEnabled true

User · Answer

To Save your bitmap in sdcard use the following code  Store Image  private void storeImage Bitmap image        File pictureFile   getOutputMediaFile        if  pictureFile    null            Log d TAG                   Error creating media file  check storage permissions        e getMessage             return             try           FileOutputStream fos   new FileOutputStream pictureFile           image compress Bitmap CompressFormat PNG  90  fos           fos close          catch  FileNotFoundException e            Log d TAG   File not found      e getMessage           catch  IOException e            Log d TAG   Error accessing file      e getMessage                 To Get the Path for Image Storage      Create a File for saving an image or video    private  File getOutputMediaFile           To be safe  you should check that the SDCard is mounted        using Environment getExternalStorageState   before doing this       File mediaStorageDir   new File Environment getExternalStorageDirectory                   Android data                 getApplicationContext   getPackageName                   Files             This location works best if you want the created images to be shared        between applications and persist after your app has been uninstalled          Create the storage directory if it does not exist     if    mediaStorageDir exists             if    mediaStorageDir mkdirs                 return null                          Create a media file name     String timeStamp   new SimpleDateFormat  ddMMyyyy HHmm   format new Date         File mediaFile          String mImageName  MI    timeStamp    jpg           mediaFile   new File mediaStorageDir getPath     File separator   mImageName         return mediaFile       EDIT     From Your comments i have edited the onclick view in this the button1 and button2  functions will be executed separately   public onClick View v    switch v getId     case R id button1    Your button 1 function break  case R id  button2    Your button 2 function break

User · Answer

You might be able to use the following for decoding  compressing and saving an image         Override      public void onClick View view                    onItemSelected1                    InputStream image stream   null                  try                       image stream   getContentResolver   openInputStream myUri                     catch  FileNotFoundException e                        e printStackTrace                                       Bitmap image  BitmapFactory decodeStream image stream                       path to sd card                 File path Environment getExternalStorageDirectory                      create a file                 File  dir new File path   ComDec                     dir mkdirs                    Date date new Date                    File file new File dir date   jpg                     OutputStream out null                  try                      out new FileOutputStream file                       image compress format size out                       out flush                        out close                          MediaStore Images Media insertImage getContentResolver    image   yourTitle     yourDescription                         image null                                      catch  IOException e                                        e printStackTrace                                      Toast makeText SecondActivity this  Image Save Successfully  Toast LENGTH LONG  show

User · Answer

To save file into directory    public static Uri saveImageToInternalStorage Context mContext  Bitmap bitmap        String mTimeStamp   new SimpleDateFormat  ddMMyyyy HHmm   format new Date          String mImageName    snap   mTimeStamp   jpg        ContextWrapper wrapper   new ContextWrapper mContext        File file   wrapper getDir  Images  MODE PRIVATE        file   new File file   snap    mImageName   jpg         try           OutputStream stream   null           stream   new FileOutputStream file            bitmap compress Bitmap CompressFormat JPEG 100 stream            stream flush             stream close          catch  IOException e                 e printStackTrace               Uri mImageUri   Uri parse file getAbsolutePath          return mImageUri      required permission   lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt

[android] How to save a bitmap on internal storage

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