如何concate /合并两个位图，使他们在android的一个图像 [英] How to concate/combine two bitmaps and make them one image in android

问题描述

谁能告诉我如何在Android的合并或连接两个位图图像为一体？

Can anyone tell me how to combine or concatenate two bitmap images into one in android?

推荐答案

您可以用画图尝试。 在这里，一个简单的例子：

You can try with Paint. Here a short example:

    package com.cyrilmottier.android.masking; 
    import android.app.Activity;
    import android.content.Context;
    import android.content.res.Resources;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.graphics.Canvas;
    import android.graphics.Paint;
    import android.graphics.PorterDuffXfermode;
    import android.graphics.PorterDuff;
    import android.os.Bundle;
    import android.view.View;

    public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(new IconView(this));
    }

    private class IconView extends View {

        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

        private Bitmap mIcon;
        private Bitmap mIconGlossy;
        private Bitmap mIconMask;

        public IconView(Context context) {
            super(context);

            // Prepares the paint that will be used to draw our icon mask. Using
            // PorterDuff.Mode.DST_IN means the image that will be drawn will
            // mask the already drawn image.
            mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));

            // Let's retrieve all icon pieces as Bitmaps.
            final Resources res = context.getResources();
            mIcon = BitmapFactory.decodeResource(res, R.drawable.icon_metromap_fake);
            mIconGlossy = BitmapFactory.decodeResource(res, R.drawable.icon_glossy);
            mIconMask = BitmapFactory.decodeResource(res, R.drawable.icon_mask);
        }

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

            // Translate the canvas in order to draw the icon in the center of
            // the view
            canvas.translate((getWidth() - mIcon.getWidth()) >> 1, (getHeight() - mIcon.getHeight()) >> 1);

            // We're now ready to drawn our iPhone-like icon :)
            canvas.drawBitmap(mIcon, 0, 0, null);
            canvas.drawBitmap(mIconGlossy, 0, 0, null);
            canvas.drawBitmap(mIconMask, 0, 0, mPaint);

            canvas.restore();
        }

    }
 }

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