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翻译  maninwest@Codeforge  作者:huyletran@ Codeproject
有时需要组合多个位图创建一个位图。这里介绍如何使用画布 Canvas 完成。
使用代码

假设有两个位图（左） left, （右）right,  左位图比右位图大。要创建一个左右位图横向结合的新位图，代码将如下所示：

private void horizontalCombine() { int width = left.getWidth() + right.getWidth(); int height = Math.max(left.getHeight(), right.getHeight());
    Bitmap leftRight = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    Canvas canvas = new Canvas(leftRight);
    canvas.drawBitmap(left, 0, 0, new Paint());
    canvas.drawBitmap(right, left.getWidth(), 0, new Paint());
    imageView.setImageBitmap(leftRight);
} 

int width = left.getWidth() + right.getWidth(); int height = Math.max(left.getHeight(), right.getHeight());
Bitmap leftRight = Bitmap.createBitmap(width, height, Config.ARGB_8888); 

• 宽 = left.getWidth() + right.getWidth()
• 高 = left.getHeight()(因为左位图更高)

 Canvas canvas = new Canvas(leftRight);

canvas.drawBitmap(right, left.getWidth(), 0, new Paint()); 

canvas.drawBitmap(right, left.getWidth(), 0, new Paint()); 

这是设备中的结果。

private void verticalCombine() { int width = Math.max(left.getWidth(), right.getWidth()); int height = left.getHeight() + right.getHeight();
    Bitmap leftRight = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    Canvas canvas = new Canvas(leftRight);
    canvas.drawBitmap(left, 0, 0, new Paint());
    canvas.drawBitmap(right, 0, left.getHeight(), new Paint());
    imageView.setImageBitmap(leftRight);
}