该样本并不完全适合您的问题,但可能会为您指明正确的方向。在此示例中,将矩阵应用于放置在透视图中的位图。如果将我与您的代码段进行比较,则可以设置多边形,但它不会应用于相机。
Bitmap bitmap2 = Bitmap.createBitmap(200, 200, Bitmap.Config.ARGB_8888); Canvas canvas2 = new Canvas(bitmap2);canvas2.drawColor(Color.WHITE); Paint rectPaint2 = new Paint(); rectPaint2.setColor(Color.GREEN); canvas2.drawRect(20, 20, 180, 180, rectPaint2); Matrix matrix2 = new Matrix(); float deform2 = 20f; float[] src2 = new float[] { 0, 0, bitmap2.getWidth(), 0, bitmap2.getWidth(), bitmap2.getHeight(), 0, bitmap2.getHeight() }; float[] dst2 = new float[] { 0, 0, bitmap2.getWidth() - deform2, deform2, bitmap2.getWidth() - deform2, bitmap2.getHeight() - deform2, 0, bitmap2.getHeight() }; matrix2.setPolyToPoly(src2, 0, dst2, 0, src2.length >> 1); Bitmap bMatrix2= Bitmap.createBitmap(bitmap2, 0, 0, bitmap2.getWidth(), bitmap2.getHeight(), matrix2, true); ImageView ivSecond = (ImageView) findViewById(R.id.ivSecond); ivSecond.setImageBitmap(bMatrix2);
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