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November 16, 2017 06:44
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| /** | |
| * RoundLayout | |
| */ | |
| public class RoundLayout extends RelativeLayout { | |
| private Bitmap mMaskBitmap; | |
| private Paint mPaint; | |
| private Paint mMaskPaint; | |
| private float mCornerRadius; | |
| private boolean isCircle = false; | |
| public RoundLayout(Context context) { | |
| super(context); | |
| init(null, 0); | |
| } | |
| public RoundLayout(Context context, AttributeSet attrs) { | |
| super(context, attrs); | |
| init(attrs, 0); | |
| } | |
| public RoundLayout(Context context, AttributeSet attrs, int defStyle) { | |
| super(context, attrs, defStyle); | |
| init(attrs, defStyle); | |
| } | |
| private void init(AttributeSet attrs, int defStyle) { | |
| if (attrs != null) { | |
| TypedArray ta = getContext().obtainStyledAttributes(attrs, R.styleable.RoundLayout); | |
| mCornerRadius = (float) ta.getDimensionPixelSize(R.styleable.RoundLayout_roundRadius, | |
| (int) mCornerRadius); | |
| isCircle = ta.getBoolean(R.styleable.RoundLayout_isRoundCircle, isCircle); | |
| ta.recycle(); | |
| } | |
| mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); | |
| mMaskPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG); | |
| mMaskPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR)); | |
| setWillNotDraw(false); | |
| } | |
| @Override | |
| protected void onSizeChanged(int w, int h, int oldw, int oldh) { | |
| super.onSizeChanged(w, h, oldw, oldh); | |
| mMaskBitmap = createMask(w, h); | |
| } | |
| @Override | |
| public void draw(Canvas canvas) { | |
| if (isInEditMode()) { | |
| super.draw(canvas); | |
| return; | |
| } | |
| Bitmap offscreenBitmap = | |
| Bitmap.createBitmap(canvas.getWidth(), canvas.getHeight(), Bitmap.Config.ARGB_8888); | |
| Canvas offscreenCanvas = new Canvas(offscreenBitmap); | |
| super.draw(offscreenCanvas); | |
| if (mMaskBitmap == null) { | |
| mMaskBitmap = createMask(canvas.getWidth(), canvas.getHeight()); | |
| } | |
| offscreenCanvas.drawBitmap(mMaskBitmap, 0f, 0f, mMaskPaint); | |
| canvas.drawBitmap(offscreenBitmap, 0f, 0f, mPaint); | |
| } | |
| private Bitmap createMask(int width, int height) { | |
| if (isCircle) { | |
| mCornerRadius = Math.min(width, height) / 2; | |
| } | |
| Bitmap mask = Bitmap.createBitmap(width, height, Bitmap.Config.ALPHA_8); | |
| Canvas canvas = new Canvas(mask); | |
| Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); | |
| paint.setColor(Color.WHITE); | |
| canvas.drawRect(0, 0, width, height, paint); | |
| paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR)); | |
| canvas.drawRoundRect(new RectF(0, 0, width, height), mCornerRadius, mCornerRadius, paint); | |
| return mask; | |
| } | |
| } |
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