android.view.View#setDrawingCacheEnabled ( )源码实例Demo

下面列出了android.view.View#setDrawingCacheEnabled ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： UltimateAndroid 文件： ViewPagerEx.java

@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
    if (!checkLayoutParams(params)) {
        params = generateLayoutParams(params);
    }
    final LayoutParams lp = (LayoutParams) params;
    lp.isDecor |= child instanceof Decor;
    if (mInLayout) {
        if (lp != null && lp.isDecor) {
            throw new IllegalStateException("Cannot add pager decor view during layout");
        }
        lp.needsMeasure = true;
        addViewInLayout(child, index, params);
    } else {
        super.addView(child, index, params);
    }

    if (USE_CACHE) {
        if (child.getVisibility() != GONE) {
            child.setDrawingCacheEnabled(mScrollingCacheEnabled);
        } else {
            child.setDrawingCacheEnabled(false);
        }
    }
}

源代码2 项目： DKVideoPlayer 文件： VerticalViewPager.java

@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
    if (!checkLayoutParams(params)) {
        params = generateLayoutParams(params);
    }
    final LayoutParams lp = (LayoutParams) params;
    lp.isDecor |= child instanceof Decor;
    if (mInLayout) {
        if (lp != null && lp.isDecor) {
            throw new IllegalStateException("Cannot add pager decor view during layout");
        }
        lp.needsMeasure = true;
        addViewInLayout(child, index, params);
    } else {
        super.addView(child, index, params);
    }

    if (USE_CACHE) {
        if (child.getVisibility() != GONE) {
            child.setDrawingCacheEnabled(mScrollingCacheEnabled);
        } else {
            child.setDrawingCacheEnabled(false);
        }
    }
}

源代码3 项目： android-project-wo2b 文件： ViewPagerCompat.java

@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
    if (!checkLayoutParams(params)) {
        params = generateLayoutParams(params);
    }
    final LayoutParams lp = (LayoutParams) params;
    lp.isDecor |= child instanceof Decor;
    if (mInLayout) {
        if (lp != null && lp.isDecor) {
            throw new IllegalStateException("Cannot add pager decor view during layout");
        }
        lp.needsMeasure = true;
        addViewInLayout(child, index, params);
    } else {
        super.addView(child, index, params);
    }

    if (USE_CACHE) {
        if (child.getVisibility() != GONE) {
            child.setDrawingCacheEnabled(mScrollingCacheEnabled);
        } else {
            child.setDrawingCacheEnabled(false);
        }
    }
}

源代码4 项目： ClockView 文件： ScreenUtils.java

/**
 * 获取当前屏幕截图，不包含状态栏
 * 
 * @param activity
 * @return
 */
public static Bitmap snapShotWithoutStatusBar(Activity activity)
{
	View view = activity.getWindow().getDecorView();
	view.setDrawingCacheEnabled(true);
	view.buildDrawingCache();
	Bitmap bmp = view.getDrawingCache();
	Rect frame = new Rect();
	activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
	int statusBarHeight = frame.top;

	int width = getScreenWidth(activity);
	int height = getScreenHeight(activity);
	Bitmap bp = null;
	bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
			- statusBarHeight);
	view.destroyDrawingCache();
	return bp;

}

源代码5 项目： InfiniteCycleViewPager 文件： VerticalViewPager.java

@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
    if (!checkLayoutParams(params)) {
        params = generateLayoutParams(params);
    }
    final LayoutParams lp = (LayoutParams) params;
    lp.isDecor |= child instanceof Decor;
    if (mInLayout) {
        if (lp != null && lp.isDecor) {
            throw new IllegalStateException("Cannot add pager decor view during layout");
        }
        lp.needsMeasure = true;
        addViewInLayout(child, index, params);
    } else {
        super.addView(child, index, params);
    }

    if (USE_CACHE) {
        if (child.getVisibility() != GONE) {
            child.setDrawingCacheEnabled(mScrollingCacheEnabled);
        } else {
            child.setDrawingCacheEnabled(false);
        }
    }
}

源代码6 项目： RxJavaApp 文件： ViewPager.java

@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
    if (!checkLayoutParams(params)) {
        params = generateLayoutParams(params);
    }
    final LayoutParams lp = (LayoutParams) params;
    lp.isDecor |= child instanceof Decor;
    if (mInLayout) {
        if (lp != null && lp.isDecor) {
            throw new IllegalStateException("Cannot add pager decor view during layout");
        }
        lp.needsMeasure = true;
        addViewInLayout(child, index, params);
    } else {
        super.addView(child, index, params);
    }

    if (USE_CACHE) {
        if (child.getVisibility() != GONE) {
            child.setDrawingCacheEnabled(mScrollingCacheEnabled);
        } else {
            child.setDrawingCacheEnabled(false);
        }
    }
}

源代码7 项目： RxTools-master 文件： RxDeviceTool.java

/**
 * 获取当前屏幕截图，不包含状态栏
 * <p>需要用到上面获取状态栏高度getStatusBarHeight的方法</p>
 *
 * @param activity activity
 * @return Bitmap
 */
public static Bitmap captureWithoutStatusBar(Activity activity) {
    View view = activity.getWindow().getDecorView();
    view.setDrawingCacheEnabled(true);
    view.buildDrawingCache();
    Bitmap bmp = view.getDrawingCache();
    int statusBarHeight = RxBarTool.getStatusBarHeight(activity);
    int width = getScreenWidth(activity);
    int height = getScreenHeight(activity);
    Bitmap ret = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height - statusBarHeight);
    view.destroyDrawingCache();
    return ret;
}

源代码8 项目： CodenameOne 文件： SlidingPaneLayout.java

@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
    final LayoutParams lp = (LayoutParams) child.getLayoutParams();
    boolean result;
    final int save = canvas.save(Canvas.CLIP_SAVE_FLAG);

    if (mCanSlide && !lp.slideable && mSlideableView != null) {
        // Clip against the slider; no sense drawing what will immediately be covered.
        canvas.getClipBounds(mTmpRect);
        mTmpRect.right = Math.min(mTmpRect.right, mSlideableView.getLeft());
        canvas.clipRect(mTmpRect);
    }

    if (Build.VERSION.SDK_INT >= 11) { // HC
        result = super.drawChild(canvas, child, drawingTime);
    } else {
        if (lp.dimWhenOffset && mSlideOffset > 0) {
            if (!child.isDrawingCacheEnabled()) {
                child.setDrawingCacheEnabled(true);
            }
            final Bitmap cache = child.getDrawingCache();
            if (cache != null) {
                canvas.drawBitmap(cache, child.getLeft(), child.getTop(), lp.dimPaint);
                result = false;
            } else {
                Log.e(TAG, "drawChild: child view " + child + " returned null drawing cache");
                result = super.drawChild(canvas, child, drawingTime);
            }
        } else {
            if (child.isDrawingCacheEnabled()) {
                child.setDrawingCacheEnabled(false);
            }
            result = super.drawChild(canvas, child, drawingTime);
        }
    }

    canvas.restoreToCount(save);

    return result;
}

源代码9 项目： Travel-Mate 文件： FunfactFragment.java

/**
 * Takes screenshot of current screen
 *
 * @param view to be taken screenshot of
 * @return bitmap of the screenshot
 */
private static Bitmap getScreenShot(View view) {
    View screenView = view.getRootView();
    screenView.setDrawingCacheEnabled(true);
    Bitmap bitmap = Bitmap.createBitmap(screenView.getDrawingCache());
    screenView.setDrawingCacheEnabled(false);
    return bitmap;
}

源代码10 项目： Android-Architecture 文件： ScreenUtil.java

/**
 * 获取当前屏幕截图，包含状态栏
 *
 * @param activity
 * @return
 */
public static Bitmap snapShotWithStatusBar(Activity activity) {
    View view = activity.getWindow().getDecorView();
    view.setDrawingCacheEnabled(true);
    view.buildDrawingCache();
    Bitmap bmp = view.getDrawingCache();
    int width = getScreenWidth(activity);
    int height = getScreenHeight(activity);
    Bitmap bp = null;
    bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
    view.destroyDrawingCache();
    return bp;

}

源代码11 项目： DragBoardView 文件： DragHelper.java

/**
 * 抓起
 *
 * @param columnView 抓起的 View
 * @param position   抓起的 View 在 横向RecyclerView 的 position
 */
public void dragCol(View columnView, int position) {
    columnView.destroyDrawingCache();
    columnView.setDrawingCacheEnabled(true);
    Bitmap bitmap = columnView.getDrawingCache();
    if (bitmap != null && !bitmap.isRecycled()) {
        mDragImageView.setImageBitmap(bitmap);
        mDragImageView.setRotation(1.5f);
        mDragImageView.setAlpha(0.8f);

        isDraggingColumn = true;

        if (columnView.getTag() instanceof DragColumn) {
            dragColumn = (DragColumn) columnView.getTag();
        }
        int dragPage = mHorizontalRecyclerView.getCurrentPosition();
        RecyclerView.ViewHolder holder = (RecyclerView.ViewHolder) mHorizontalRecyclerView.findViewHolderForAdapterPosition(dragPage);
        if (holder != null && holder.itemView != null && holder.getItemViewType() == TYPE_CONTENT) {
            mCurrentVerticalRecycleView = ((DragHorizontalViewHolder) holder).getRecyclerView();
            mPagerPosition = dragPage;
        }

        getTargetHorizontalRecyclerViewScrollBoundaries();
        getTargetVerticalRecyclerViewScrollBoundaries();

        int[] location = new int[2];
        columnView.getLocationOnScreen(location);
        mWindowParams.x = location[0];
        mWindowParams.y = location[1];
        mBornLocationX = location[0];
        mBornLocationY = location[1];
        confirmOffset = false;
        mPosition = position;
        mWindowManager.addView(mDragImageView, mWindowParams);
        getHorizontalAdapter().onDrag(position);
    }
}

源代码12 项目： android-recipes-app 文件： ViewPager.java

private void setScrollingCacheEnabled(boolean enabled) {
    if (mScrollingCacheEnabled != enabled) {
        mScrollingCacheEnabled = enabled;
        if (USE_CACHE) {
            final int size = getChildCount();
            for (int i = 0; i < size; ++i) {
                final View child = getChildAt(i);
                if (child.getVisibility() != GONE) {
                    child.setDrawingCacheEnabled(enabled);
                }
            }
        }
    }
}

源代码13 项目： AndroidFrame 文件： PowerfulStickyDecoration.java

/**
 * 通知重新绘制
 * 使用场景：网络图片加载后调用
 * 建议：配合{@link #setStrongReference(boolean)}方法使用，体验更佳
 * @param recyclerView recyclerView
 * @param position position
 */
public void notifyRedraw(RecyclerView recyclerView, View viewGroup, int position) {
    viewGroup.setDrawingCacheEnabled(false);
    mBitmapCache.remove(position);
    mHeadViewCache.remove(position);
    int left = recyclerView.getPaddingLeft();
    int right = recyclerView.getWidth() - recyclerView.getPaddingRight();
    measureAndLayoutView(viewGroup, left, right);
    mHeadViewCache.put(position, viewGroup);
    recyclerView.invalidate();
}

源代码14 项目： MousePaint 文件： Blur.java

/**
     * 从View 中生成 BitMap
     *
     * @param view
     * @return
     */
    public static Bitmap convertFromView(View view) {

        Bitmap bitmap=null;
        Rect rect = new Rect();
        view.getDrawingRect(rect);
        view.destroyDrawingCache();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache(true);
        bitmap = view.getDrawingCache(true);


            /**
             * After rotation, the DecorView has no height and no width. Therefore
             * .getDrawingCache() return null. That's why we  have to force measure and layout.
             */
            if (bitmap == null) {
                view.measure(
                        View.MeasureSpec.makeMeasureSpec(rect.width(), View.MeasureSpec.EXACTLY),
                        View.MeasureSpec.makeMeasureSpec(rect.height(), View.MeasureSpec.EXACTLY)
                );
                view.layout(0, 0, view.getMeasuredWidth(),
                        view.getMeasuredHeight());
                view.destroyDrawingCache();
                view.setDrawingCacheEnabled(true);
                view.buildDrawingCache(true);
                bitmap = view.getDrawingCache(true);
            }

//        view.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
//                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
//        view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
//        view.buildDrawingCache();
//        Bitmap bitmap = view.getDrawingCache();

        return bitmap;
    }

源代码15 项目： LB-Launcher 文件： ShortcutAndWidgetContainer.java

@Override
protected void setChildrenDrawingCacheEnabled(boolean enabled) {
    final int count = getChildCount();
    for (int i = 0; i < count; i++) {
        final View view = getChildAt(i);
        view.setDrawingCacheEnabled(enabled);
        // Update the drawing caches
        if (!view.isHardwareAccelerated() && enabled) {
            view.buildDrawingCache(true);
        }
    }
}

源代码16 项目： UPMiss 文件： BackgroundActivity.java

@Override
public void onAttachedToWindow() {
    super.onAttachedToWindow();
    final View view = this.getWindow().getDecorView();
    if (view != null)
        view.setDrawingCacheEnabled(true);
}

源代码17 项目： youqu_master 文件： ChangeModeController.java

/**
 * 获取一个 View 的缓存视图
 *
 * @param view
 * @return
 */
private static Bitmap getCacheBitmapFromView(View view) {
    final boolean drawingCacheEnabled = true;
    view.setDrawingCacheEnabled(drawingCacheEnabled);
    view.buildDrawingCache(drawingCacheEnabled);
    final Bitmap drawingCache = view.getDrawingCache();
    Bitmap bitmap;
    if (drawingCache != null) {
        bitmap = Bitmap.createBitmap(drawingCache);
        view.setDrawingCacheEnabled(false);
    } else {
        bitmap = null;
    }
    return bitmap;
}

源代码18 项目： AndroidPicker 文件： ConvertUtils.java

/**
 * 把view转化为bitmap（截图）
 * 参见：http://www.cnblogs.com/lee0oo0/p/3355468.html
 */
public static Bitmap toBitmap(View view) {
    int width = view.getWidth();
    int height = view.getHeight();
    if (view instanceof ListView) {
        height = 0;
        // 获取listView实际高度
        ListView listView = (ListView) view;
        for (int i = 0; i < listView.getChildCount(); i++) {
            height += listView.getChildAt(i).getHeight();
        }
    } else if (view instanceof ScrollView) {
        height = 0;
        // 获取scrollView实际高度
        ScrollView scrollView = (ScrollView) view;
        for (int i = 0; i < scrollView.getChildCount(); i++) {
            height += scrollView.getChildAt(i).getHeight();
        }
    }
    view.setDrawingCacheEnabled(true);
    view.clearFocus();
    view.setPressed(false);
    boolean willNotCache = view.willNotCacheDrawing();
    view.setWillNotCacheDrawing(false);
    // Reset the drawing cache background color to fully transparent for the duration of this operation
    int color = view.getDrawingCacheBackgroundColor();
    view.setDrawingCacheBackgroundColor(Color.WHITE);//截图去黑色背景(透明像素)
    if (color != Color.WHITE) {
        view.destroyDrawingCache();
    }
    view.buildDrawingCache();
    Bitmap cacheBitmap = view.getDrawingCache();
    if (cacheBitmap == null) {
        return null;
    }
    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    canvas.drawBitmap(cacheBitmap, 0, 0, null);
    canvas.save();
    canvas.restore();
    if (!bitmap.isRecycled()) {
        LogUtils.verbose("recycle bitmap: " + bitmap.toString());
        bitmap.recycle();
    }
    // Restore the view
    view.destroyDrawingCache();
    view.setWillNotCacheDrawing(willNotCache);
    view.setDrawingCacheBackgroundColor(color);
    return bitmap;
}

源代码19 项目： MiBandDecompiled 文件： SlidingPaneLayout.java

protected boolean drawChild(Canvas canvas, View view, long l1)
{
    LayoutParams layoutparams = (LayoutParams)view.getLayoutParams();
    int i1 = canvas.save(2);
    if (j && !layoutparams.a && k != null)
    {
        canvas.getClipBounds(w);
        w.right = Math.min(w.right, k.getLeft());
        canvas.clipRect(w);
    }
    boolean flag;
    if (android.os.Build.VERSION.SDK_INT >= 11)
    {
        flag = super.drawChild(canvas, view, l1);
    } else
    if (layoutparams.b && l > 0.0F)
    {
        if (!view.isDrawingCacheEnabled())
        {
            view.setDrawingCacheEnabled(true);
        }
        android.graphics.Bitmap bitmap = view.getDrawingCache();
        if (bitmap != null)
        {
            canvas.drawBitmap(bitmap, view.getLeft(), view.getTop(), layoutparams.c);
            flag = false;
        } else
        {
            Log.e("SlidingPaneLayout", (new StringBuilder()).append("drawChild: child view ").append(view).append(" returned null drawing cache").toString());
            flag = super.drawChild(canvas, view, l1);
        }
    } else
    {
        if (view.isDrawingCacheEnabled())
        {
            view.setDrawingCacheEnabled(false);
        }
        flag = super.drawChild(canvas, view, l1);
    }
    canvas.restoreToCount(i1);
    return flag;
}

源代码20 项目： geopaparazzi 文件： EasyPaint.java

@Override
public boolean onTouchEvent(MotionEvent event) {
    LinePath linePath;
    int index;
    int id;
    int eventMasked = event.getActionMasked();
    switch (eventMasked) {
        case MotionEvent.ACTION_DOWN:
        case MotionEvent.ACTION_POINTER_DOWN: {
            index = event.getActionIndex();
            id = event.getPointerId(index);

            if (extractingColor) { //If the user chose the 'extract color' menu option, the touch event indicates where they want to extract the color from.
                extractingColor = false;

                View v = findViewById(R.id.CanvasId);
                v.setDrawingCacheEnabled(true);
                Bitmap cachedBitmap = v.getDrawingCache();

                int newColor = cachedBitmap.getPixel(Math.round(event.getX(index)), Math.round(event.getY(index)));

                v.destroyDrawingCache();
                colorChanged(newColor);

                Toast.makeText(getApplicationContext(),
                        R.string.color_extracted,
                        Toast.LENGTH_SHORT).show();
            } else {

                linePath = multiLinePathManager.addLinePathWithPointer(id);
                if (linePath != null) {
                    linePath.touchStart(event.getX(index), event.getY(index));
                } else {
                    Log.e("anupam", "Too many fingers!");
                }
            }

            break;
        }
        case MotionEvent.ACTION_MOVE:
            for (int i = 0; i < event.getPointerCount(); i++) {
                id = event.getPointerId(i);
                index = event.findPointerIndex(id);
                linePath = multiLinePathManager.findLinePathFromPointer(id);
                if (linePath != null) {
                    linePath.touchMove(event.getX(index), event.getY(index));
                }
                wasMadeDirty = true;
            }
            break;
        case MotionEvent.ACTION_UP:
        case MotionEvent.ACTION_POINTER_UP:
        case MotionEvent.ACTION_CANCEL:
            index = event.getActionIndex();
            id = event.getPointerId(index);
            linePath = multiLinePathManager.findLinePathFromPointer(id);
            if (linePath != null) {
                linePath.lineTo(linePath.getLastX(), linePath.getLastY());

                // Commit the path to our offscreen
                mCanvas.drawPath(linePath, mPaint);

                // Kill this so we don't double draw
                linePath.reset();

                // Allow this LinePath to be associated to another idPointer
                linePath.disassociateFromPointer();
            }
            wasMadeDirty = true;
            break;
    }
    invalidate();
    return true;
}

方法所在类

android.view.View