title: android:implement Shared Preference
body: <p>I am making an app in which i have to draw image in canvas and then SAVE that image in shared preference and then show in next screen .Any help will be appreciated</p>
  
  <pre><code>public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(new DrawingPanel(this));
      mPaint = new Paint();
      mPaint.setDither(true);
  
  
  //    mPaint.setColor(0xFF FF FF FF);
      System.out.println("hello1");
      mPaint.setColor(Color.BLACK);
      System.out.println("hello2");
  
      mPaint.setStyle(Paint.Style.STROKE);
      mPaint.setStrokeJoin(Paint.Join.ROUND);
      mPaint.setStrokeCap(Paint.Cap.ROUND);
      mPaint.setStrokeWidth(3);
  
  
  }
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.game_menu, menu);
      return true;
  }
  @SuppressWarnings("null")
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
      // Handle item selection
      switch (item.getItemId()) {
          case R.id.create_new: // **ON THIS CLICK I WANT TO SAVE IMAGE**
  
              System.out.println("hii");
          //  name = cur.getString(cur.getColumnIndex(MediaStore.Images.Media.DATA));
              System.out.println("hii1");
              date1 = currentTimeString;
              System.out.println("hii2");
          //  cur = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, null, null, null);
              System.out.println("hii3");
          //  File f1=new File("/sdcard/" + date1 + ".png");
              System.out.println("hii4");
  
            //  FileSave fs = null;
          //  fs.Save(f1);
              // Add a new record without the bitmap, but with the values just set.
              // insert() returns the URI of the new record.
          //  Uri uri = getContentResolver().insert(Media.EXTERNAL_CONTENT_URI, values);
  
              // Now get a handle to the file for that record, and save the data into it.
              // Here, sourceBitmap is a Bitmap object representing the file to save to the database.
              try {
                  //   FileOutputStream out = new FileOutputStream(path);
                     bmp.compress(Bitmap.CompressFormat.PNG, 90, out);
              } catch (Exception e) {
                     e.printStackTrace();
              }
  
  
  
  
              return true;
  
          case R.id.erase:
          System.out.println("new2");
                mPaint.setColor(-1);
               mPaint.setAlpha(0);
               mPaint.setAntiAlias(true);
               mPaint.setStyle(Paint.Style.STROKE);
               mPaint.setStrokeCap(Paint.Cap.ROUND);
               mPaint.setStrokeWidth(1);
  
  
                  Intent intent1 = new Intent(getApplicationContext(), CanvasDrawingActivity.class);
                  intent1.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                  startActivity(intent1);
                  finish();
  
  
              return true;
  
  
          default:
              return super.onOptionsItemSelected(item);
      }
  }
  
  
  
  class DrawingPanel extends SurfaceView implements SurfaceHolder.Callback {
      private DrawingThread _thread;
      private Path path;
  
      public DrawingPanel(Context context) {
          super(context);
          getHolder().addCallback(this);
          _thread = new DrawingThread(getHolder(), this);
      }
  
  
  
  
      @Override
      protected void onAttachedToWindow() {
          // TODO Auto-generated method stub
          super.onAttachedToWindow();
          System.out.println("hello");
           Save=(Button)findViewById(R.id.Save);
           System.out.println("hello2");
      }
  
  
  
  
      public boolean onTouchEvent(MotionEvent event) {
          synchronized (_thread.getSurfaceHolder()) {
          if(event.getAction() == MotionEvent.ACTION_DOWN){
          path = new Path();
          path.moveTo(event.getX(), event.getY());
          path.lineTo(event.getX(), event.getY());
          }else if(event.getAction() == MotionEvent.ACTION_MOVE){
          path.lineTo(event.getX(), event.getY());
          _graphics.add(path);
          path = new Path();
          path.moveTo(event.getX(), event.getY());
          }else if(event.getAction() == MotionEvent.ACTION_UP){
          path.lineTo(event.getX(), event.getY());
          _graphics.add(path);
          }
  
          return true;
          }
          }
  
      @Override
      public void onDraw(Canvas canvas) {
          canvas.drawColor(Color.WHITE);
          for (Path path : _graphics) {
              //canvas.drawPoint(graphic.x, graphic.y, mPaint);
              canvas.drawPath(path, mPaint);
              canvas.drawPath(path, mPaint);
          }
      }
  
      public void surfaceChanged(SurfaceHolder holder, int format, int width,
                                 int height) {
          // TODO Auto-generated method stub
  
      }
  
      public void surfaceCreated(SurfaceHolder holder) {
          // TODO Auto-generated method stub
          _thread.setRunning(true);
          _thread.start();
      }
  
      public void surfaceDestroyed(SurfaceHolder holder) {
          // TODO Auto-generated method stub
          boolean retry = true;
          _thread.setRunning(false);
          while (retry) {
              try {
                  _thread.join();
                  retry = false;
              } catch (InterruptedException e) {
                  // we will try it again and again...
              }
          }
      }
  }
  
  class DrawingThread extends Thread {
      private SurfaceHolder _surfaceHolder;
      private DrawingPanel _panel;
      private boolean _run = false;
  
      public DrawingThread(SurfaceHolder surfaceHolder, DrawingPanel panel) {
          _surfaceHolder = surfaceHolder;
          _panel = panel;
      }
  
      public void setRunning(boolean run) {
          _run = run;
      }
  
      public SurfaceHolder getSurfaceHolder() {
          return _surfaceHolder;
      }
  
      @Override
      public void run() {
          Canvas c;
          while (_run) {
              c = null;
              try {
                  c = _surfaceHolder.lockCanvas(null);
                  synchronized (_surfaceHolder) {
                      _panel.onDraw(c);
                  }
              } finally {
                  // do this in a finally so that if an exception is thrown
                  // during the above, we don't leave the Surface in an
                  // inconsistent state
                  if (c != null) {
                      _surfaceHolder.unlockCanvasAndPost(c);
                  }
              }
          }
      }
  }
  </code></pre>
  
  <p>}</p>
  
  <p><img src="https://i.stack.imgur.com/QNTng.png" alt="i want to save this image in shared preference and open in next screen with thumbnail">i want to save this image in shared preference and open in next screen with thumbnail</p>