安卓怎样合并两张图片？

Question

我有这两张图片，我基本上在画布上合并它们。现在我想把那个画布保存成一张图片。我应该怎么做？或者是否有其他方法可以合并两张图片。

我的示例代码是 -

            Bitmap bmp1 = BitmapFactory.decodeResource(getResources(),
                R.drawable.duckpic);
        Bitmap bmp2 = BitmapFactory.decodeResource(getResources(),
                R.drawable.img);
        // canvas.drawColor(Color.BLACK);
        // canvas.drawBitmap(_scratch, 10, 10, null);
        Bitmap bmOverlay = Bitmap.createBitmap(bmp2.getWidth(), bmp2
                .getHeight(), bmp2.getConfig());
        // Canvas cs = new Canvas(bmp2);
        canvas.scale((float) 0.5, (float) 0.5);
        canvas.drawBitmap(bmp2, new Matrix(), null);
        canvas.drawBitmap(bmp1, new Matrix(), null);
        canvas.save();

我通过以下方式解决了这个问题 -

    cs = Bitmap.createBitmap(c.getWidth(), c.getHeight(), Bitmap.Config.ARGB_8888);

    Canvas comboImage = new Canvas(cs);

    comboImage.drawBitmap(s, new Matrix(), null);
    comboImage.drawBitmap(c, new Matrix(), null);
    comboImage.save();
    // this is an extra bit I added, just incase you want to save the new
    // image somewhere and then return the location

    String tmpImg = String.valueOf(System.currentTimeMillis()) + ".png";

    OutputStream os = null;
    try {
        os = new FileOutputStream("/sdcard/" + tmpImg);
        cs.compress(CompressFormat.PNG, 100, os);
    } catch (IOException e) {
        Log.e("combineImages", "problem combining images", e);
    }

这里基本上给出了答案 - http://www.jondev.net/articles/Combining_2_Images_in_Android_using_Canvas

- nasaa

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请参考这个链接：http://kyogs.blogspot.in/2012/08/mearge-images.html - kyogs

Answer 1

使用canvas.setBitmap(Bitmap bitmap)方法。这将把画布发送到指定的位图上。您需要为此创建一个新的可变位图。在调用setBitmap之后，您可以将该位图保存到文件中。

- Haphazard