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Diffstat (limited to 'libs/color-picker-view/src/afzkl/development/mColorPicker/views/ColorPickerView.java')
| -rw-r--r-- | libs/color-picker-view/src/afzkl/development/mColorPicker/views/ColorPickerView.java | 998 |
1 files changed, 998 insertions, 0 deletions
diff --git a/libs/color-picker-view/src/afzkl/development/mColorPicker/views/ColorPickerView.java b/libs/color-picker-view/src/afzkl/development/mColorPicker/views/ColorPickerView.java new file mode 100644 index 00000000..eb216c88 --- /dev/null +++ b/libs/color-picker-view/src/afzkl/development/mColorPicker/views/ColorPickerView.java @@ -0,0 +1,998 @@ +/* + * Copyright (C) 2010 Daniel Nilsson + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + + +package afzkl.development.mColorPicker.views; + +import afzkl.development.mColorPicker.drawables.AlphaPatternDrawable; + +import android.content.Context; +import android.graphics.Canvas; +import android.graphics.Color; +import android.graphics.ComposeShader; +import android.graphics.LinearGradient; +import android.graphics.Paint; +import android.graphics.Paint.Align; +import android.graphics.Paint.Style; +import android.graphics.Point; +import android.graphics.PorterDuff; +import android.graphics.RectF; +import android.graphics.Shader; +import android.graphics.Shader.TileMode; +import android.util.AttributeSet; +import android.view.MotionEvent; +import android.view.View; + +import java.lang.reflect.Method; + +/** + * Displays a color picker to the user and allow them + * to select a color. A slider for the alpha channel is + * also available. Enable it by setting + * setAlphaSliderVisible(boolean) to true. + * @author Daniel Nilsson + */ +@SuppressWarnings("all") +public class ColorPickerView extends View{ + + public interface OnColorChangedListener{ + public void onColorChanged(int color); + } + + private final static int PANEL_SAT_VAL = 0; + private final static int PANEL_HUE = 1; + private final static int PANEL_ALPHA = 2; + + /** + * The width in pixels of the border + * surrounding all color panels. + */ + private final static float BORDER_WIDTH_PX = 1; + + /** + * The width in dp of the hue panel. + */ + private float HUE_PANEL_WIDTH = 30f; + /** + * The height in dp of the alpha panel + */ + private float ALPHA_PANEL_HEIGHT = 20f; + /** + * The distance in dp between the different + * color panels. + */ + private float PANEL_SPACING = 10f; + /** + * The radius in dp of the color palette tracker circle. + */ + private float PALETTE_CIRCLE_TRACKER_RADIUS = 5f; + /** + * The dp which the tracker of the hue or alpha panel + * will extend outside of its bounds. + */ + private float RECTANGLE_TRACKER_OFFSET = 2f; + + + private static float mDensity = 1f; + + private OnColorChangedListener mListener; + + private Paint mSatValPaint; + private Paint mSatValTrackerPaint; + + private Paint mHuePaint; + private Paint mHueTrackerPaint; + + private Paint mAlphaPaint; + private Paint mAlphaTextPaint; + + private Paint mBorderPaint; + + private Shader mValShader; + private Shader mSatShader; + private Shader mHueShader; + private Shader mAlphaShader; + + private int mAlpha = 0xff; + private float mHue = 360f; + private float mSat = 0f; + private float mVal = 0f; + + private String mAlphaSliderText = "Alpha"; + private int mSliderTrackerColor = 0xff1c1c1c; + private int mBorderColor = 0xff6E6E6E; + private boolean mShowAlphaPanel = false; + + /* + * To remember which panel that has the "focus" when + * processing hardware button data. + */ + private int mLastTouchedPanel = PANEL_SAT_VAL; + + /** + * Offset from the edge we must have or else + * the finger tracker will get clipped when + * it is drawn outside of the view. + */ + private float mDrawingOffset; + + + /* + * Distance form the edges of the view + * of where we are allowed to draw. + */ + private RectF mDrawingRect; + + private RectF mSatValRect; + private RectF mHueRect; + private RectF mAlphaRect; + + private AlphaPatternDrawable mAlphaPattern; + + private Point mStartTouchPoint = null; + + + public ColorPickerView(Context context) { + this(context, null); + } + + public ColorPickerView(Context context, AttributeSet attrs) { + this(context, attrs, 0); + } + + public ColorPickerView(Context context, AttributeSet attrs, int defStyle) { + super(context, attrs, defStyle); + init(); + } + + private void init() { + mDensity = getContext().getResources().getDisplayMetrics().density; + PALETTE_CIRCLE_TRACKER_RADIUS *= mDensity; + RECTANGLE_TRACKER_OFFSET *= mDensity; + HUE_PANEL_WIDTH *= mDensity; + ALPHA_PANEL_HEIGHT *= mDensity; + PANEL_SPACING = PANEL_SPACING * mDensity; + + mDrawingOffset = calculateRequiredOffset(); + + initPaintTools(); + + //Needed for receiving trackball motion events. + setFocusable(true); + setFocusableInTouchMode(true); + } + + private void initPaintTools() { + + mSatValPaint = new Paint(); + mSatValTrackerPaint = new Paint(); + mHuePaint = new Paint(); + mHueTrackerPaint = new Paint(); + mAlphaPaint = new Paint(); + mAlphaTextPaint = new Paint(); + mBorderPaint = new Paint(); + + + mSatValTrackerPaint.setStyle(Style.STROKE); + mSatValTrackerPaint.setStrokeWidth(2f * mDensity); + mSatValTrackerPaint.setAntiAlias(true); + + mHueTrackerPaint.setColor(mSliderTrackerColor); + mHueTrackerPaint.setStyle(Style.STROKE); + mHueTrackerPaint.setStrokeWidth(2f * mDensity); + mHueTrackerPaint.setAntiAlias(true); + + mAlphaTextPaint.setColor(0xff1c1c1c); + mAlphaTextPaint.setTextSize(14f * mDensity); + mAlphaTextPaint.setAntiAlias(true); + mAlphaTextPaint.setTextAlign(Align.CENTER); + mAlphaTextPaint.setFakeBoldText(true); + + + } + + private float calculateRequiredOffset() { + float offset = Math.max(PALETTE_CIRCLE_TRACKER_RADIUS, RECTANGLE_TRACKER_OFFSET); + offset = Math.max(offset, BORDER_WIDTH_PX * mDensity); + + return offset * 1.5f; + } + + private int[] buildHueColorArray() { + + int[] hue = new int[361]; + + int count = 0; + for (int i = hue.length -1; i >= 0; i--, count++) { + hue[count] = Color.HSVToColor(new float[]{i, 1f, 1f}); + } + + return hue; + } + + @Override + protected void onAttachedToWindow() { + super.onAttachedToWindow(); + checkHardwareAccelerationSupport(); + } + + @Override + protected void onDraw(Canvas canvas) { + + if (mDrawingRect.width() <= 0 || mDrawingRect.height() <= 0) return; + + drawSatValPanel(canvas); + drawHuePanel(canvas); + drawAlphaPanel(canvas); + + } + + private void drawSatValPanel(Canvas canvas) { + + final RectF rect = mSatValRect; + + if (BORDER_WIDTH_PX > 0) { + mBorderPaint.setColor(mBorderColor); + canvas.drawRect(mDrawingRect.left, mDrawingRect.top, rect.right + BORDER_WIDTH_PX, rect.bottom + BORDER_WIDTH_PX, mBorderPaint); + } + + if (mValShader == null) { + mValShader = new LinearGradient(rect.left, rect.top, rect.left, rect.bottom, + 0xffffffff, 0xff000000, TileMode.CLAMP); + } + + int rgb = Color.HSVToColor(new float[]{mHue,1f,1f}); + + mSatShader = new LinearGradient(rect.left, rect.top, rect.right, rect.top, + 0xffffffff, rgb, TileMode.CLAMP); + ComposeShader mShader = new ComposeShader(mValShader, mSatShader, PorterDuff.Mode.MULTIPLY); + mSatValPaint.setShader(mShader); + + canvas.drawRect(rect, mSatValPaint); + + Point p = satValToPoint(mSat, mVal); + + mSatValTrackerPaint.setColor(0xff000000); + canvas.drawCircle(p.x, p.y, PALETTE_CIRCLE_TRACKER_RADIUS - 1f * mDensity, mSatValTrackerPaint); + + mSatValTrackerPaint.setColor(0xffdddddd); + canvas.drawCircle(p.x, p.y, PALETTE_CIRCLE_TRACKER_RADIUS, mSatValTrackerPaint); + + } + + private void drawHuePanel(Canvas canvas) { + + final RectF rect = mHueRect; + + if (BORDER_WIDTH_PX > 0) { + mBorderPaint.setColor(mBorderColor); + canvas.drawRect(rect.left - BORDER_WIDTH_PX, + rect.top - BORDER_WIDTH_PX, + rect.right + BORDER_WIDTH_PX, + rect.bottom + BORDER_WIDTH_PX, + mBorderPaint); + } + + if (mHueShader == null) { + mHueShader = new LinearGradient(rect.left, rect.top, rect.left, rect.bottom, buildHueColorArray(), null, TileMode.CLAMP); + mHuePaint.setShader(mHueShader); + } + + canvas.drawRect(rect, mHuePaint); + + float rectHeight = 4 * mDensity / 2; + + Point p = hueToPoint(mHue); + + RectF r = new RectF(); + r.left = rect.left - RECTANGLE_TRACKER_OFFSET; + r.right = rect.right + RECTANGLE_TRACKER_OFFSET; + r.top = p.y - rectHeight; + r.bottom = p.y + rectHeight; + + + canvas.drawRoundRect(r, 2, 2, mHueTrackerPaint); + + } + + private void drawAlphaPanel(Canvas canvas) { + + if (!mShowAlphaPanel || mAlphaRect == null || mAlphaPattern == null) return; + + final RectF rect = mAlphaRect; + + if (BORDER_WIDTH_PX > 0) { + mBorderPaint.setColor(mBorderColor); + canvas.drawRect(rect.left - BORDER_WIDTH_PX, + rect.top - BORDER_WIDTH_PX, + rect.right + BORDER_WIDTH_PX, + rect.bottom + BORDER_WIDTH_PX, + mBorderPaint); + } + + + mAlphaPattern.draw(canvas); + + float[] hsv = new float[]{mHue,mSat,mVal}; + int color = Color.HSVToColor(hsv); + int acolor = Color.HSVToColor(0, hsv); + + mAlphaShader = new LinearGradient(rect.left, rect.top, rect.right, rect.top, + color, acolor, TileMode.CLAMP); + + + mAlphaPaint.setShader(mAlphaShader); + + canvas.drawRect(rect, mAlphaPaint); + + if (mAlphaSliderText != null && mAlphaSliderText!= "") { + canvas.drawText(mAlphaSliderText, rect.centerX(), rect.centerY() + 4 * mDensity, mAlphaTextPaint); + } + + float rectWidth = 4 * mDensity / 2; + + Point p = alphaToPoint(mAlpha); + + RectF r = new RectF(); + r.left = p.x - rectWidth; + r.right = p.x + rectWidth; + r.top = rect.top - RECTANGLE_TRACKER_OFFSET; + r.bottom = rect.bottom + RECTANGLE_TRACKER_OFFSET; + + canvas.drawRoundRect(r, 2, 2, mHueTrackerPaint); + + } + + + private Point hueToPoint(float hue) { + + final RectF rect = mHueRect; + final float height = rect.height(); + + Point p = new Point(); + + p.y = (int) (height - (hue * height / 360f) + rect.top); + p.x = (int) rect.left; + + return p; + } + + private Point satValToPoint(float sat, float val) { + + final RectF rect = mSatValRect; + final float height = rect.height(); + final float width = rect.width(); + + Point p = new Point(); + + p.x = (int) (sat * width + rect.left); + p.y = (int) ((1f - val) * height + rect.top); + + return p; + } + + private Point alphaToPoint(int alpha) { + + final RectF rect = mAlphaRect; + final float width = rect.width(); + + Point p = new Point(); + + p.x = (int) (width - (alpha * width / 0xff) + rect.left); + p.y = (int) rect.top; + + return p; + + } + + private float[] pointToSatVal(float x, float y) { + + final RectF rect = mSatValRect; + float[] result = new float[2]; + + float width = rect.width(); + float height = rect.height(); + + if (x < rect.left) { + x = 0f; + } + else if (x > rect.right) { + x = width; + } + else{ + x = x - rect.left; + } + + if (y < rect.top) { + y = 0f; + } + else if (y > rect.bottom) { + y = height; + } + else{ + y = y - rect.top; + } + + + result[0] = 1.f / width * x; + result[1] = 1.f - (1.f / height * y); + + return result; + } + + private float pointToHue(float y) { + + final RectF rect = mHueRect; + + float height = rect.height(); + + if (y < rect.top) { + y = 0f; + } + else if (y > rect.bottom) { + y = height; + } + else{ + y = y - rect.top; + } + + return 360f - (y * 360f / height); + } + + private int pointToAlpha(int x) { + + final RectF rect = mAlphaRect; + final int width = (int) rect.width(); + + if (x < rect.left) { + x = 0; + } + else if (x > rect.right) { + x = width; + } + else{ + x = x - (int)rect.left; + } + + return 0xff - (x * 0xff / width); + + } + + + @Override + public boolean onTrackballEvent(MotionEvent event) { + + float x = event.getX(); + float y = event.getY(); + + boolean update = false; + + + if (event.getAction() == MotionEvent.ACTION_MOVE) { + + switch(mLastTouchedPanel) { + + case PANEL_SAT_VAL: + + float sat, val; + + sat = mSat + x/50f; + val = mVal - y/50f; + + if (sat < 0f) { + sat = 0f; + } + else if (sat > 1f) { + sat = 1f; + } + + if (val < 0f) { + val = 0f; + } + else if (val > 1f) { + val = 1f; + } + + mSat = sat; + mVal = val; + + update = true; + + break; + + case PANEL_HUE: + + float hue = mHue - y * 10f; + + if (hue < 0f) { + hue = 0f; + } + else if (hue > 360f) { + hue = 360f; + } + + mHue = hue; + + update = true; + + break; + + case PANEL_ALPHA: + + if (!mShowAlphaPanel || mAlphaRect == null) { + update = false; + } + else{ + + int alpha = (int) (mAlpha - x*10); + + if (alpha < 0) { + alpha = 0; + } + else if (alpha > 0xff) { + alpha = 0xff; + } + + mAlpha = alpha; + + + update = true; + } + + break; + } + + + } + + + if (update) { + + if (mListener != null) { + mListener.onColorChanged(Color.HSVToColor(mAlpha, new float[]{mHue, mSat, mVal})); + } + + invalidate(); + return true; + } + + + return super.onTrackballEvent(event); + } + + @Override + public boolean onTouchEvent(MotionEvent event) { + + boolean update = false; + + switch(event.getAction()) { + + case MotionEvent.ACTION_DOWN: + + mStartTouchPoint = new Point((int)event.getX(), (int)event.getY()); + + update = moveTrackersIfNeeded(event); + + break; + + case MotionEvent.ACTION_MOVE: + + update = moveTrackersIfNeeded(event); + + break; + + case MotionEvent.ACTION_UP: + + mStartTouchPoint = null; + + update = moveTrackersIfNeeded(event); + + break; + + } + + if (update) { + + if (mListener != null) { + mListener.onColorChanged(Color.HSVToColor(mAlpha, new float[]{mHue, mSat, mVal})); + } + + invalidate(); + return true; + } + + + return super.onTouchEvent(event); + } + + private boolean moveTrackersIfNeeded(MotionEvent event) { + + if (mStartTouchPoint == null) return false; + + boolean update = false; + + int startX = mStartTouchPoint.x; + int startY = mStartTouchPoint.y; + + + if (mHueRect.contains(startX, startY)) { + mLastTouchedPanel = PANEL_HUE; + + mHue = pointToHue(event.getY()); + + update = true; + } + else if (mSatValRect.contains(startX, startY)) { + + mLastTouchedPanel = PANEL_SAT_VAL; + + float[] result = pointToSatVal(event.getX(), event.getY()); + + mSat = result[0]; + mVal = result[1]; + + update = true; + } + else if (mAlphaRect != null && mAlphaRect.contains(startX, startY)) { + + mLastTouchedPanel = PANEL_ALPHA; + + mAlpha = pointToAlpha((int)event.getX()); + + update = true; + } + + + return update; + } + + + @Override + protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { + + int width = 0; + int height = 0; + + int widthMode = MeasureSpec.getMode(widthMeasureSpec); + int heightMode = MeasureSpec.getMode(heightMeasureSpec); + + int widthAllowed = MeasureSpec.getSize(widthMeasureSpec); + int heightAllowed = MeasureSpec.getSize(heightMeasureSpec); + + + widthAllowed = chooseWidth(widthMode, widthAllowed); + heightAllowed = chooseHeight(heightMode, heightAllowed); + + + if (!mShowAlphaPanel) { + height = (int) (widthAllowed - PANEL_SPACING - HUE_PANEL_WIDTH); + + //If calculated height (based on the width) is more than the allowed height. + if (height > heightAllowed) { + height = heightAllowed; + width = (int) (height + PANEL_SPACING + HUE_PANEL_WIDTH); + } + else{ + width = widthAllowed; + } + } + else{ + + width = (int) (heightAllowed - ALPHA_PANEL_HEIGHT + HUE_PANEL_WIDTH); + + if (width > widthAllowed) { + width = widthAllowed; + height = (int) (widthAllowed - HUE_PANEL_WIDTH + ALPHA_PANEL_HEIGHT); + } + else{ + height = heightAllowed; + } + + + } + + + setMeasuredDimension(width, height); + } + + private int chooseWidth(int mode, int size) { + if (mode == MeasureSpec.AT_MOST || mode == MeasureSpec.EXACTLY) { + return size; + } else { // (mode == MeasureSpec.UNSPECIFIED) + return getPrefferedWidth(); + } + } + + private int chooseHeight(int mode, int size) { + if (mode == MeasureSpec.AT_MOST || mode == MeasureSpec.EXACTLY) { + return size; + } else { // (mode == MeasureSpec.UNSPECIFIED) + return getPreferedHeight(); + } + } + + private int getPrefferedWidth() { + + int width = getPreferedHeight(); + + if (mShowAlphaPanel) { + width -= (PANEL_SPACING + ALPHA_PANEL_HEIGHT); + } + + + return (int) (width + HUE_PANEL_WIDTH + PANEL_SPACING); + + } + + private int getPreferedHeight() { + + int height = (int)(200 * mDensity); + + if (mShowAlphaPanel) { + height += PANEL_SPACING + ALPHA_PANEL_HEIGHT; + } + + return height; + } + + + + @Override + protected void onSizeChanged(int w, int h, int oldw, int oldh) { + super.onSizeChanged(w, h, oldw, oldh); + + mDrawingRect = new RectF(); + mDrawingRect.left = mDrawingOffset + getPaddingLeft(); + mDrawingRect.right = w - mDrawingOffset - getPaddingRight(); + mDrawingRect.top = mDrawingOffset + getPaddingTop(); + mDrawingRect.bottom = h - mDrawingOffset - getPaddingBottom(); + + setUpSatValRect(); + setUpHueRect(); + setUpAlphaRect(); + } + + private void setUpSatValRect() { + + final RectF dRect = mDrawingRect; + float panelSide = dRect.height() - BORDER_WIDTH_PX * 2; + + if (mShowAlphaPanel) { + panelSide -= PANEL_SPACING + ALPHA_PANEL_HEIGHT; + } + + float left = dRect.left + BORDER_WIDTH_PX; + float top = dRect.top + BORDER_WIDTH_PX; + float bottom = top + panelSide; + float right = left + panelSide; + + mSatValRect = new RectF(left,top, right, bottom); + } + + private void setUpHueRect() { + final RectF dRect = mDrawingRect; + + float left = dRect.right - HUE_PANEL_WIDTH + BORDER_WIDTH_PX; + float top = dRect.top + BORDER_WIDTH_PX; + float bottom = dRect.bottom - BORDER_WIDTH_PX - (mShowAlphaPanel ? (PANEL_SPACING + ALPHA_PANEL_HEIGHT) : 0); + float right = dRect.right - BORDER_WIDTH_PX; + + mHueRect = new RectF(left, top, right, bottom); + } + + private void setUpAlphaRect() { + + if (!mShowAlphaPanel) return; + + final RectF dRect = mDrawingRect; + + float left = dRect.left + BORDER_WIDTH_PX; + float top = dRect.bottom - ALPHA_PANEL_HEIGHT + BORDER_WIDTH_PX; + float bottom = dRect.bottom - BORDER_WIDTH_PX; + float right = dRect.right - BORDER_WIDTH_PX; + + mAlphaRect = new RectF(left, top, right, bottom); + + + mAlphaPattern = new AlphaPatternDrawable((int) (5 * mDensity)); + mAlphaPattern.setBounds(Math.round(mAlphaRect.left), Math + .round(mAlphaRect.top), Math.round(mAlphaRect.right), Math + .round(mAlphaRect.bottom)); + + + + } + + + /** + * Set a OnColorChangedListener to get notified when the color + * selected by the user has changed. + * @param listener + */ + public void setOnColorChangedListener(OnColorChangedListener listener) { + mListener = listener; + } + + /** + * Set the color of the border surrounding all panels. + * @param color + */ + public void setBorderColor(int color) { + mBorderColor = color; + invalidate(); + } + + /** + * Get the color of the border surrounding all panels. + */ + public int getBorderColor() { + return mBorderColor; + } + + /** + * Get the current color this view is showing. + * @return the current color. + */ + public int getColor() { + return Color.HSVToColor(mAlpha, new float[]{mHue,mSat,mVal}); + } + + /** + * Set the color the view should show. + * @param color The color that should be selected. + */ + public void setColor(int color) { + setColor(color, false); + } + + /** + * Set the color this view should show. + * @param color The color that should be selected. + * @param callback If you want to get a callback to + * your OnColorChangedListener. + */ + public void setColor(int color, boolean callback) { + + int alpha = Color.alpha(color); + int red = Color.red(color); + int blue = Color.blue(color); + int green = Color.green(color); + + float[] hsv = new float[3]; + + Color.RGBToHSV(red, green, blue, hsv); + + mAlpha = alpha; + mHue = hsv[0]; + mSat = hsv[1]; + mVal = hsv[2]; + + if (callback && mListener != null) { + mListener.onColorChanged(Color.HSVToColor(mAlpha, new float[]{mHue, mSat, mVal})); + } + + invalidate(); + } + + /** + * Get the drawing offset of the color picker view. + * The drawing offset is the distance from the side of + * a panel to the side of the view minus the padding. + * Useful if you want to have your own panel below showing + * the currently selected color and want to align it perfectly. + * @return The offset in pixels. + */ + public float getDrawingOffset() { + return mDrawingOffset; + } + + /** + * Set if the user is allowed to adjust the alpha panel. Default is false. + * If it is set to false no alpha will be set. + * @param visible + */ + public void setAlphaSliderVisible(boolean visible) { + + if (mShowAlphaPanel != visible) { + mShowAlphaPanel = visible; + + /* + * Reset all shader to force a recreation. + * Otherwise they will not look right after + * the size of the view has changed. + */ + mValShader = null; + mSatShader = null; + mHueShader = null; + mAlphaShader = null;; + + requestLayout(); + } + + } + + public void setSliderTrackerColor(int color) { + mSliderTrackerColor = color; + + mHueTrackerPaint.setColor(mSliderTrackerColor); + + invalidate(); + } + + public int getSliderTrackerColor() { + return mSliderTrackerColor; + } + + /** + * Set the text that should be shown in the + * alpha slider. Set to null to disable text. + * @param res string resource id. + */ + public void setAlphaSliderText(int res) { + String text = getContext().getString(res); + setAlphaSliderText(text); + } + + /** + * Set the text that should be shown in the + * alpha slider. Set to null to disable text. + * @param text Text that should be shown. + */ + public void setAlphaSliderText(String text) { + mAlphaSliderText = text; + invalidate(); + } + + /** + * Get the current value of the text + * that will be shown in the alpha + * slider. + * @return + */ + public String getAlphaSliderText() { + return mAlphaSliderText; + } + + /** + * Method that checks the support for HardwareAcceleration. Check AOSP notice<br/> + * <br/> + * <pre> + * 'ComposeShader can only contain shaders of different types (a BitmapShader and a + * LinearGradient for instance, but not two instances of BitmapShader)'. But, 'If your + * application is affected by any of these missing features or limitations, you can turn + * off hardware acceleration for just the affected portion of your application by calling + * setLayerType(View.LAYER_TYPE_SOFTWARE, null).' + */ + private void checkHardwareAccelerationSupport() { + // HardwareAcceleration sit is only available since ICS. 14 = ICS_VERSION_CODE + if (android.os.Build.VERSION.SDK_INT >= 14) { + try{ + // We need to use reflection to get that method to avoid compilation errors + Method isHardwareAccelerated = + getClass().getMethod("isHardwareAccelerated", new Class[]{}); + Object o = isHardwareAccelerated.invoke(this, new Object[]{}); + if (null != o && o instanceof Boolean && (Boolean)o) { + // HardwareAcceleration is supported. Use SoftwareAcceleration + Method setLayerType = + getClass().getMethod( + "setLayerType", int.class, android.graphics.Paint.class); + setLayerType.invoke(this, 1, new Object[]{}); + } + } catch (Exception e) { /** NON BLOCK **/} + } + } + +} |