安卓节省3位图作为1 [英] android saving 3 bitmaps as 1

问题描述

我有一个应用程序，需要的图片。它创建2子集位图，用失真处理这些位图，然后在原来的重叠放置的子集。有没有一种方法来保存所有三个位图作为一（因为它出现在手机屏幕上）？我想保存用户在屏幕上看到的东西对SD卡的第四位图？我有一种感觉，我这样做是错误的。

感谢

[UPDATE1]

  @覆盖
    公共无效的OnDraw（帆布油画）{
        super.onDraw（画布）;

        Log.e（TAG，******要绘制BGR）;
        canvas.drawBitmap（BGR，0，0，NULL）;

        如果（isLocked ==真＆功放;＆安培; bothCirclesInPlace ==真）{
            如果（OVERLAY！= NULL）
             canvas.drawBitmap（叠加，CENTREX半径，centreY半径，NULL）;
            如果（overLay2！= NULL）
             canvas.drawBitmap（overLay2，centreA半径，centreB半径，NULL）;
        }
 

解决方案

是的，它可以覆盖多个位图，并保存为一个图像文件（PNG / JPEG / ..）。

的一种方法是使用画布类。随着涂料Canvas类定义了位图叠加的方式。

随着code将展示多个位图覆盖到一个单一的图像文件。

 尝试{
        //字符串mFilePath：文件的绝对路径保存

        //位图mBitmap1：第一个位图。这正好为背景。
        //位图mCBitmap：与帆布相关的位图。所有绘制在画布上绘制这个位图。
        //位图mBitmap2：第二位。如此状态下的第一的顶部（在该例子作为前景。

        //涂料mPaint1：油漆绘制第一个位图
        //涂料mPaint2：油漆绘制第二位的第一个位图的顶部

        位图mCBitmap = Bitmap.createBitmap（mBitmap1.getWidth（），mBitmap1.getHeight（），mBitmap1.getConfig（））;

        帆布的TCanvas =新的Canvas（mCBitmap）;

        tCanvas.drawBitmap（mBitmap1，0，0，mPaint1）;

        mPaint2.setXfermode（新PorterDuffXfermode（PorterDuff.Mode.DARKEN））;
        // XFER模式定义叠加特性

        tCanvas.drawBitmap（mBitmap2，0，0，mPaint2）;

        的FileOutputStream流=新的FileOutputStream（mFilePath）;
        mCBitmap.com preSS（比较pressFormat.JPEG，100，流）;

        stream.flush（）;
        stream.close（）;
    }赶上（例外五）{
        Log.e（无法保存，e.toString（））;
}
 

词shash

I've an app that takes a picture. It creates 2 subset bitmaps, processes these bitmaps with a distortion, then places the subsets over the original as overlays. Is there a way to save all three bitmaps as one (as it appears on the phone's screen)? I'd like to save what the user sees on the screen as a fourth bitmap on the sdcard? I've a feeling I've done this wrong.

Thanks

[update1]

@Override
    public void onDraw(Canvas canvas){
        super.onDraw(canvas);

        Log.e(TAG, "******about to draw bgr ");
        canvas.drawBitmap(bgr, 0, 0, null);

        if (isLocked == true && bothCirclesInPlace == true){
            if(overLay != null)
             canvas.drawBitmap(overLay, centreX-radius, centreY-radius, null);
            if(overLay2 != null)
             canvas.drawBitmap(overLay2, centreA-radius, centreB-radius, null);
        }

解决方案

Yes it is possible to overlay multiple bitmaps and save as a single image file (PNG / JPEG / ..).

One way is to use Canvas class. Canvas along with Paint class defines the way in which bitmaps are overlayed.

Following code will demonstrate multiple bitmap overlay into a single image file.

try {
        // String mFilePath  : Absolute Path of the file to be saved 

        // Bitmap mBitmap1   : First bitmap. This goes as background.
        // Bitmap mCBitmap   : Bitmap associated with the Canvas. All draws on the canvas are drawn into this bitmap.
        // Bitmap mBitmap2   : Second bitmap. This goes on top of first (in this example serves as foreground.

        // Paint mPaint1     : Paint to draw first bitmap
        // Paint mPaint2     : Paint to draw second bitmap on top of first bitmap

        Bitmap mCBitmap = Bitmap.createBitmap(mBitmap1.getWidth(), mBitmap1.getHeight(), mBitmap1.getConfig());

        Canvas tCanvas = new Canvas(mCBitmap);

        tCanvas.drawBitmap(mBitmap1, 0, 0, mPaint1);

        mPaint2.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DARKEN));
        // XFer modes define the overlay characteristic

        tCanvas.drawBitmap(mBitmap2, 0, 0, mPaint2);

        FileOutputStream stream = new FileOutputStream(mFilePath);
        mCBitmap.compress(CompressFormat.JPEG, 100, stream);

        stream.flush();
        stream.close();
    } catch(Exception e) {
        Log.e("Could not save", e.toString());
}

Shash

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