在 Android 中从 RelativeLayout 创建位图答案

【问题标题】：Create Bitmap from RelativeLayout in Android在 Android 中从 RelativeLayout 创建位图
【发布时间】：2017-06-21 16:07:59
【问题描述】：

我有一个 RelativeLayout 并想从中创建一个位图并以字节为单位发送到蓝牙打印机。根据设备分辨率，当我的位图生成更改 textviews 字体大小 - 分辨率越高，字体大小越高。无论设备分辨率如何，如何只生成一种尺寸？

我的代码：

layout.setDrawingCacheEnabled(true);
layout.measure(View.MeasureSpec.makeMeasureSpec(580, View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(layout.getMeasuredHeight(), View.MeasureSpec.UNSPECIFIED));
layout.layout(0, 0, layout.getMeasuredWidth(), layout.getMeasuredHeight());
layout.buildDrawingCache(false);
Bitmap sImagem = Bitmap.createBitmap(layout.getDrawingCache(false));
layout.setDrawingCacheEnabled(false);

580 是我的纸张尺寸，在打印机上没问题！

【问题讨论】：

标签： android android-layout printing bitmap

【解决方案1】：

试试这个

      private void takeScreenShot(){
         int totalHeight = mScreenshotLayout.getHeight();
         int totalWidth  = mScreenshotLayout.getWidth();

         Bitmap b = getBitmapFromView(mScreenshotLayout,totalHeight,totalWidth);
         SendingMail(b);

      }

      public Bitmap getBitmapFromView(View view, int totalHeight, int totalWidth) {
      Bitmap returnedBitmap = Bitmap.createBitmap(totalWidth,totalHeight ,Bitmap.Config.ARGB_8888);
      Canvas canvas = new Canvas(returnedBitmap);
      Drawable bgDrawable = view.getBackground();
      if (bgDrawable != null)
        bgDrawable.draw(canvas);
     else
        canvas.drawColor(Color.WHITE);
     view.draw(canvas);
     return returnedBitmap;
}

【讨论】：