Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I saw really good code on android developers, but I can't find it anymore... It's output is bezier curves so it will be pretty smooth. Here is code that I edited:</p> <pre><code>public class MyDrawView extends View { private Bitmap mBitmap; private Canvas mCanvas; private Path mPath; private Paint mBitmapPaint; private Paint mPaint; public MyDrawView(Context c) { super(c); mPath = new Path(); mBitmapPaint = new Paint(Paint.DITHER_FLAG); mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setDither(true); mPaint.setColor(0xFF000000); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeJoin(Paint.Join.ROUND); mPaint.setStrokeCap(Paint.Cap.ROUND); mPaint.setStrokeWidth(3); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); mCanvas = new Canvas(mBitmap); } @Override protected void onDraw(Canvas canvas) { canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint); canvas.drawPath(mPath, mPaint); } private float mX, mY; private static final float TOUCH_TOLERANCE = 4; private void touch_start(float x, float y) { mPath.reset(); mPath.moveTo(x, y); mX = x; mY = y; } private void touch_move(float x, float y) { float dx = Math.abs(x - mX); float dy = Math.abs(y - mY); if (dx &gt;= TOUCH_TOLERANCE || dy &gt;= TOUCH_TOLERANCE) { mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2); mX = x; mY = y; } } private void touch_up() { mPath.lineTo(mX, mY); // commit the path to our offscreen mCanvas.drawPath(mPath, mPaint); // kill this so we don't double draw mPath.reset(); } @Override public boolean onTouchEvent(MotionEvent event) { float x = event.getX(); float y = event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: touch_start(x, y); invalidate(); break; case MotionEvent.ACTION_MOVE: touch_move(x, y); invalidate(); break; case MotionEvent.ACTION_UP: touch_up(); invalidate(); break; } return true; } public void clear(){ mBitmap.eraseColor(Color.TRANSPARENT); invalidate(); System.gc(); }} </code></pre> <p>then in onCreate of activity you want to use it in you just write something like this:</p> <pre><code>RelativeLayout parent = (RelativeLayout) findViewById(R.id.signImageParent); myDrawView = new MyDrawView(this); parent.addView(myDrawView); </code></pre> <p>This view is transparent and uses black paint to draw with your finger. So if you want see what you draw simply draw a white or gray bitmap on background of this view (you just add one line in the beginnig of onDraw), or you can use the background of the parent.</p> <p>Then when you want to create an image from what you have drawn you just call</p> <pre><code>parent.setDrawingCacheEnabled(true); Bitmap b = parent.getDrawingCache(); FileOutputStream fos = null; try { fos = new FileOutputStream(getFileName()); } catch (FileNotFoundException e) { e.printStackTrace(); } b.compress(CompressFormat.PNG, 95, fos); </code></pre> <p>It depends on what you want to have as output, you can use this code or instead of <em>parent</em> you can do this with <em>myDrawView</em> and you get just the image you have drawn without background (since we have our myDrawView background transparent).</p> <p>Hope this will help. Feel free to leave feedback.</p>
    singulars
    1. This table or related slice is empty.
    1. PODrawing on Canvas and save image
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USkleopatra
    1. USBelovoj
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PODrawing on Canvas and save image
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COAwesome code...!!!
      singulars
      1. PO
      1. USManjunath
    2. COThanks, it's what I need.
      singulars
      1. PO
      1. USlucasjmatias
    3. COWhat if I have a TextView that I want to make it into a drawing board to allow free draw?
      singulars
      1. PO
      1. USZahid H
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload