android-canvas

I have a canvas on which I draw lines: //see code upd I need to make the pipette tool which will take color from my canvas. How may I make it? Code upd: private static class DrawView extends View { ... public DrawView(Context context) { super(context); setFocusable(true); mBitmap = Bitmap.createBitmap(640, 860, Bitmap.Config.ARGB_8888); mCanvas = new Canvas(mBitmap); mPath = new Path(); mBitmapPaint = new Paint(Paint.DITHER_FLAG); this.setDrawingCacheEnabled(true); } @Override protected void onDraw(Canvas canvas) { canvas.drawColor(0xFFAAAAAA); canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);

I have generated a simple waveform like the picture below with my code. But I want to give more gap between each line I want it to be like the soundcloud waves like the picutre below. Here is my code: public class VisualizerView extends View { private static final int LINE_WIDTH = 15; // width of visualizer lines private static final int LINE_SCALE = 55; // scales visualizer lines private List<Float> amplitudes; // amplitudes for line lengths private int width; // width of this View private int height; // height of this View private Paint linePaint; // specifies line drawing characteristics //

I am using the image crop library from here https://github.com/lvillani/android-cropimage in my project to crop images stored on device. However, certain users are reporting crashes with the following stack trace java.lang.UnsupportedOperationException at android.view.GLES20Canvas.clipPath(GLES20Canvas.java:413) at com.android.camera.HighlightView.draw(HighlightView.java:101) at com.android.camera.CropImageView.onDraw(CropImage.java:783) at android.view.View.draw(View.java:11006) at android.view.View.getDisplayList(View.java:10445) at android.view.ViewGroup.drawChild(ViewGroup.java:2850) at

I have DrawView. If I touch this view it draws small circles. I wont to draw circles but not to touch view - with help function "setPoints". What I do: package com.samples; import ... public class DrawView extends View { ArrayList<Point> points = new ArrayList<Point>(); Paint paint = new Paint(); private int pSize = 5; private int pColor = Color.BLACK; public DrawView(Context context, AttributeSet attrs) { super(context, attrs); setFocusable(true); setFocusableInTouchMode(true); this.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { v

I'm trying to draw a circle on an image which placed as res/drawable/schoolboard.png . the image fills the activity background. the following does not work: Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.schoolboard); Paint paint = new Paint(); paint.setAntiAlias(true); paint.setColor(Color.BLUE); Canvas canvas = new Canvas(bitmap); canvas.drawCircle(60, 50, 25, paint); ImageView imageView = (ImageView)findViewById(R.drawable.schoolboard); imageView.setAdjustViewBounds(true); imageView.setImageBitmap(bitmap); any help will be highly appreciated. thanks. moh.sukhni