下面列出了android.view.View#getDrawingCache ( ) 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。
/**
* 获取当前屏幕截图，不包含状态栏
*/
public static Bitmap snapShotWithoutStatusBar(@NonNull 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 = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height - statusBarHeight);
view.destroyDrawingCache();
return bp;
}
public static Bitmap drawViewToBitmap(View view, int width, int height, float translateX,
float translateY, int downSampling,String color) {
float scale = 1f / downSampling;
int bmpWidth = (int) (width * scale - translateX / downSampling);
int bmpHeight = (int) (height * scale - translateY / downSampling);
Bitmap dest = Bitmap.createBitmap(bmpWidth, bmpHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(dest);
canvas.translate(-translateX / downSampling, -translateY / downSampling);
if (downSampling > 1) {
canvas.scale(scale, scale);
}
Paint paint = new Paint();
paint.setFlags(Paint.FILTER_BITMAP_FLAG | Paint.ANTI_ALIAS_FLAG);
PorterDuffColorFilter filter =
new PorterDuffColorFilter(Color.parseColor(color),PorterDuff.Mode.SRC_ATOP);
paint.setColorFilter(filter);
view.buildDrawingCache();
Bitmap cache = view.getDrawingCache();
canvas.drawBitmap(cache, 0, 0, paint);
cache.recycle();
view.destroyDrawingCache();
return dest;
}
@NonNull
private BitmapDrawable convertViewToDrawable(@NonNull View view) {
int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
view.measure(spec, spec);
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
Bitmap bitmap = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.translate(-view.getScrollX(), -view.getScrollY());
view.draw(canvas);
view.setDrawingCacheEnabled(true);
Bitmap cacheBmp = view.getDrawingCache();
Bitmap viewBmp = cacheBmp.copy(Bitmap.Config.ARGB_8888, true);
view.destroyDrawingCache();
return new BitmapDrawable(null, viewBmp);
}
/**
* Generates a screenshot of the specified `View`
*
* @param view the `View` component
* @return the screenshot
*/
public static Bitmap getViewScreenshot(final View view) {
// set up the drawing cache
view.setDrawingCacheEnabled(true);
view.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
// get the screenshot
final Bitmap viewScreenshot = view.getDrawingCache(true);
final Bitmap output = viewScreenshot.copy(viewScreenshot.getConfig(), false);
// disable the drawing cache again
view.destroyDrawingCache();
view.setDrawingCacheEnabled(false);
return output;
}
private Bitmap getRootBitmap() {
final View view = this.getWindow().getDecorView();
Bitmap bitmap = view.getDrawingCache();
int statusBarHeight = 0;
// If need cut statusBar on sdk < KITKAT
if (NEED_CUT) {
Rect frame = new Rect();
view.getWindowVisibleDisplayFrame(frame);
statusBarHeight = frame.top;
}
// Src
bitmap = Bitmap.createBitmap(bitmap, 0, statusBarHeight, bitmap.getWidth(),
bitmap.getHeight() - statusBarHeight);
view.destroyDrawingCache();
return bitmap;
}
@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;
}
private void a()
{
View view = getView().findViewById(0x7f0a001e);
view.buildDrawingCache();
android.graphics.Bitmap bitmap = view.getDrawingCache();
String s = (new StringBuilder()).append(Environment.getExternalStorageDirectory().getAbsolutePath()).append("/tmp.jpg").toString();
Utils.saveBitmapToFile(s, bitmap);
view.findViewById(0x7f0a001e).destroyDrawingCache();
Intent intent = new Intent();
intent.setClass(getActivity(), cn/com/smartdevices/bracelet/ui/ShareActivity);
intent.putExtra("date", d.getText());
intent.putExtra("Mode", 1);
intent.putExtra("Image", s);
startActivityForResult(intent, 32769);
}
/**
* 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;
}
/**
* 抓起
*
* @param dragger 抓起的 View
* @param position 抓起的 View 在 RecyclerView 的 position
*/
public void dragItem(View dragger, int position) {
dragger.destroyDrawingCache();
dragger.setDrawingCacheEnabled(true);
Bitmap bitmap = dragger.getDrawingCache();
if (bitmap != null && !bitmap.isRecycled()) {
mDragImageView.setImageBitmap(bitmap);
mDragImageView.setRotation(1.5f);
mDragImageView.setAlpha(0.8f);
isDraggingItem = true;
if (dragger.getTag() instanceof DragItem) {
dragItem = (DragItem) dragger.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];
dragger.getLocationOnScreen(location);
mWindowParams.x = location[0];
mWindowParams.y = location[1];
mBornLocationX = location[0];
mBornLocationY = location[1];
confirmOffset = false;
mPosition = position;
mWindowManager.addView(mDragImageView, mWindowParams);
getCurrentVerticalAdapter().onDrag(position);
}
}
public static Bitmap convertViewToBitMap(View view){
// 打开图像缓存
view.setDrawingCacheEnabled(true);
// 必须调用measure和layout方法才能成功保存可视组件的截图到png图像文件
// 测量View大小
int i = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
int n = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
view.measure(i, n);
// 发送位置和尺寸到View及其所有的子View
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
// 获得可视组件的截图
Bitmap bitmap = view.getDrawingCache();
return bitmap;
}
/**
* 获取当前屏幕截图，不包含状态栏
*
* @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 = getStatusBarHeight(activity);//获取状态栏高度
DisplayMetrics dm = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
Bitmap ret = Bitmap.createBitmap(bmp, 0, statusBarHeight, dm.widthPixels, dm.heightPixels - statusBarHeight);
view.destroyDrawingCache();
return ret;
}
@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;
}
public static Bitmap getActivityBitmap(Activity activity) {
View view = activity.getWindow().getDecorView();
/* Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
view.draw(canvas);*/
view.buildDrawingCache();
return view.getDrawingCache();
}
private Bitmap getChildDrawingCache(final View child) {
Bitmap bitmap = child.getDrawingCache();
if (bitmap == null) {
child.setDrawingCacheEnabled(true);
child.buildDrawingCache();
bitmap = child.getDrawingCache();
}
return bitmap;
}
public static Bitmap screenShot2(View view) {
Log.d(TAG, "Screenshot2 called: " + view.getWidth() + "," + view.getHeight());
view.setDrawingCacheEnabled(true);
view.buildDrawingCache(true);
final Bitmap bitmap = view.getDrawingCache(true);
return bitmap;
}
public void takeScreenShot() {
View v1 = activity.getWindow().getDecorView().getRootView();
v1.setDrawingCacheEnabled(true);
Bitmap myBitmap = v1.getDrawingCache();
String filePath = saveBitmap(myBitmap);
v1.setDrawingCacheEnabled(false);
if (filePath != null) {
sendMail(filePath);
}
}
/**
* 获取当前屏幕截图，包含状态栏
*
* @param activity activity
* @return Bitmap
*/
public static Bitmap captureWithStatusBar(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 ret = Bitmap.createBitmap(bmp, 0, 0, width, height);
view.destroyDrawingCache();
return ret;
}
/**
* Draw the view into a bitmap.
*/
private Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
Log.e(TAG, "failed getViewBitmap(" + v + ")", new RuntimeException());
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* returns a new Bitmap with a clipped vertical area of the original view cache
*
* @param view The view to clip
* @param top Top Y coordinate where to start to clip
* @param bottom Lower Y coordinate where to end the clip
* @return A new Bitmap with the clipped area
*/
private Bitmap clipBitmap(View view, int top, int bottom) {
view.buildDrawingCache(false);
Bitmap fullImage = view.getDrawingCache();
Bitmap clipView = Bitmap.createBitmap(fullImage.getWidth(), fullImage.getHeight() / 2, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(clipView);
Rect source = new Rect(0, top, fullImage.getWidth(), bottom);
Rect target = new Rect(0, 0, clipView.getWidth(), clipView.getHeight());
c.drawBitmap(fullImage, source, target, null);
view.destroyDrawingCache();
return clipView;
}
/**
* Calls {@link View#getDrawingCache(boolean)}.
*
* @return A bitmap representing this view, or null if caching is disabled
* or {@link View#buildDrawingCache(boolean)} has not been called
*/
public static Bitmap getDrawingCache(View view, boolean autoScale) {
return view.getDrawingCache(autoScale);
}