将 View 显示出来的图像转换为 Bitmap

ViewToBitmap.java

/**
 * 转换 View 为 Bitmap
 */
public static Bitmap viewToBitmap(View v) {
    if (v.getMeasuredHeight() <= 0) {
        v.measure(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        Bitmap b = Bitmap.createBitmap(v.getMeasuredWidth(), v.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
        Canvas c = new Canvas(b);
        v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
        v.draw(c);
        return b;
    }
    Bitmap b = Bitmap.createBitmap(v.getMeasuredWidth(), v.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(b);
    v.layout(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
    v.draw(c);
    return b;
}