Android实现长图截取、拼接和添加水印

 adb shell screencap -p /sdcard/screenshot.pngadb pull /sdcard/screenshot.pngadb shell rm /sdcard/screenshot.png

 public static Bitmap captureView(View view){     view..setDrawingCacheEnabled(true);     Bitmap bmp = view..getDrawingCache();     view..setDrawingCacheEnabled(true);     return bmp;}

 public static Bitmap captureScreen(Activity activity) {    activity.getWindow().getDecorView().setDrawingCacheEnabled(true);    Bitmap bmp=getWindow().getDecorView().getDrawingCache();    return bmp;}

  /** * 獲取到實際內容高度 * @return */@Overridepublic int computeVerticalScrollRange() {    int verticalY = super.computeVerticalScrollRange();    Logger.e("verticalY=" + verticalY);    return verticalY;}

     public static void screenshot(WebView view, CaptureCallback captureCallback) {    int width = view.getWidth();    if (view instanceof CustomWebView) {        int height = ((CustomWebView) view).computeVerticalScrollRange();        view.postDelayed(() -> {            Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_4444);            Canvas canvas = new Canvas(bmp);            view.draw(canvas);            String path = FileUtils.saveBitmapToSDCard(Bitmap.createBitmap(bmp, 0, 0, width, height), new File(view.getContext().getExternalCacheDir(), "screenshot.jpg").toString());            captureCallback.finish(path);        }, 500);    }}

   /** * 截图,调用此方法之前，说明view已经显示并绘制完成 * * @param toolbar     toolbarView * @param bottomBar   底部bar * @param contentView 内容View * @param watermark   是否添加水印 * @param callback    回调，返回截图地址 */public static void screenshot(@NonNull View toolbar, View bottomBar, View contentView, boolean watermark, CaptureCallback callback) {    int width = contentView.getWidth();    int topHeight = toolbar.getHeight();    int bottomH = 0;    if (bottomBar != null) {        bottomH = bottomBar.getHeight();    }    int bottomHeight = bottomH;    contentView.postDelayed(() -> {        int contentViewHeight = contentView.getHeight();        if (contentView instanceof CustomWebView) {            contentViewHeight = ((CustomWebView) contentView).computeVerticalScrollRange();        }        int height = topHeight + bottomHeight + contentViewHeight;//截图总高度        Bitmap contentBmp = Bitmap.createBitmap(width, contentViewHeight, Bitmap.Config.ARGB_4444);        Canvas contentCanvas = new Canvas(contentBmp);        contentView.draw(contentCanvas);        toolbar.setDrawingCacheEnabled(true);        Bitmap topBmp = toolbar.getDrawingCache();        Bitmap bottomBmp = null;        if (bottomBar != null) {            bottomBar.setDrawingCacheEnabled(true);            bottomBmp = bottomBar.getDrawingCache();        }        Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(bmp);        //開始拼圖        Paint paint = new Paint();        canvas.drawBitmap(topBmp, 0, 0, paint);//画底部toolbar        canvas.drawBitmap(contentBmp, 0, topHeight, paint);//画内容        if (bottomBmp != null) {            canvas.drawBitmap(bottomBmp, 0, contentViewHeight + topHeight, paint);//画底部bar        }        if (watermark) {//是否添加水印            drawTextMark(width, height, canvas);        }        //保存圖片        String path = FileUtils.saveBitmapToSDCard(Bitmap.createBitmap(bmp, 0, 0, width, height), new File(contentView.getContext().getExternalCacheDir(), "screenshot.jpg").toString());        callback.finish(path);        toolbar.setDrawingCacheEnabled(false);        if (bottomBar != null) {            bottomBar.setDrawingCacheEnabled(false);        }    }, 500);}private static void drawTextMark(int bmpWidth, int bmpHeight, Canvas canvas) {        TextPaint textPaint = new TextPaint();        int textSize = 24;        textPaint.setTextSize(textSize);        textPaint.setColor(Color.parseColor("#999999"));        textPaint.setAlpha(257);        //水印文本由组织名称，用户名和时间组成        String groupName = "组织名称";        String userName = "@用户名";        String datetime = DateUtils.formatDate(new Date());        float w = Math.max(textPaint.measureText(groupName), Math.max(textPaint.measureText(userName), textPaint.measureText(datetime)));        int width = (int) Math.ceil(w);        int start = (bmpWidth - width) / 2;        int top = 320 + textSize * 2;        int count = bmpHeight / top;        Bitmap bmp = Bitmap.createBitmap(width, textSize * 4, Bitmap.Config.ARGB_8888);        Canvas textCanvas = new Canvas(bmp);        textCanvas.drawText(groupName, 0, textSize, textPaint);        textCanvas.drawText(userName, 0, textSize * 2, textPaint);        textCanvas.drawText(datetime, 0, textSize * 3, textPaint);        Bitmap newBmp = rotateBitmap(bmp, -45);        for (int i = 0; i < count; ++i) {            canvas.drawBitmap(newBmp, start, top * i, null);        }}private static Bitmap rotateBitmap(Bitmap origin, float degree) {    if (origin == null) {        return null;    }    int width = origin.getWidth();    int height = origin.getHeight();    Matrix matrix = new Matrix();    matrix.setRotate(degree);    // 围绕原地进行旋转    Bitmap newBM = Bitmap.createBitmap(origin, 0, 0, width, height, matrix, false);    if (newBM.equals(origin)) {        return newBM;    }    origin.recycle();    return newBM;}