android 图片下方添加文字水印

package com.dji.FPVDemo;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.text.Layout;import android.text.StaticLayout;import android.text.TextPaint;/** * Created by mzm on 2019/3/20. */public class WaterMarkerUtils {    public Bitmap addWaterMark(Bitmap src, String text) {        return createBitmap(src, getWaterBitmap(src,text));    }    private Bitmap getWaterBitmap(Bitmap src, String text) {        Bitmap newBitmap = Bitmap.createBitmap(src.getWidth(),150, Bitmap.Config.ARGB_4444);        Canvas canvas = new Canvas(newBitmap);        canvas.drawRGB(0, 0, 0);        TextPaint textPaint = new TextPaint();        textPaint.setAntiAlias(true);        textPaint.setTextSize(30.0F);        textPaint.setColor(Color.WHITE);        StaticLayout sl= new StaticLayout(text, textPaint, newBitmap.getWidth()-8, Layout.Alignment.ALIGN_NORMAL, 1.0f, 0.0f, false);        canvas.translate(6, 10);        sl.draw(canvas);        canvas.save();        canvas.restore();        return newBitmap;    }    private Bitmap createBitmap(Bitmap src, Bitmap watermark) {        if (src == null) {            return null;        }        int w = src.getWidth();        int h = src.getHeight();        int wh = watermark.getHeight();        Bitmap newb = Bitmap.createBitmap(w, h + wh, Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(newb);        canvas.drawBitmap(src, 0, 0, null);        canvas.drawBitmap(watermark, 0, h, null);        canvas.save();        canvas.restore();        src.recycle();        watermark.recycle();        return newb;    }}
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