images/loading.gif' data-original="http://images2015.cnblogs.com/blog/822717/201511/822717-20151125235946468-1686401306.jpg" />
1 package com.zzw.addwatermark; 2 3 import android.app.Activity; 4 import android.graphics.Bitmap; 5 import android.graphics.Canvas; 6 import android.graphics.Bitmap.Config; 7 import android.graphics.Color; 8 import android.graphics.Paint; 9 import android.graphics.drawable.BitmapDrawable;10 import android.graphics.drawable.Drawable;11 import android.os.Bundle;12 import android.view.Menu;13 import android.view.MenuItem;14 import android.widget.ImageView;15 16 17 public class MainActivity extends Activity {18 19 @Override20 protected void onCreate(Bundle savedInstanceState) {21 super.onCreate(savedInstanceState);22 setContentView(R.layout.activity_main);23 24 ImageView imageView=(ImageView) findViewById(R.id.imageView);25 26 //使用drawable里面的一张图片,我的头像为例27 Drawable drawable=getResources().getDrawable(R.drawable.test);28 29 //把Drawable转换为Bitmap30 BitmapDrawable bd=(BitmapDrawable) drawable; 31 Bitmap bm=bd.getBitmap();32 33 //为Bitmap添加水印34 Bitmap bitmap=createWatermark(bm, "www.cnblogs.com/zzw1994");35 imageView.setImageBitmap(bitmap);36 }37 38 // 为图片target添加水印文字 39 // Bitmap target:被添加水印的图片 40 // String mark:水印文章 41 private Bitmap createWatermark(Bitmap target,String mark){42 int width=target.getWidth();43 int height=target.getHeight();44 45 Bitmap bitmap=Bitmap.createBitmap(width, height, Config.ARGB_8888);46 Canvas canvas=new Canvas(bitmap);47 48 Paint paint=new Paint();49 50 //设置水印的颜色51 paint.setColor(Color.RED);52 //设置水印字体的大小53 paint.setTextSize(10);54 55 //去锯齿56 paint.setAntiAlias(true);57 //获取原图片的内容58 canvas.drawBitmap(target, 0, 0, paint);59 // 在最下方的左边位置开始添加水印 60 canvas.drawText(mark, 0, height, paint);61 62 canvas.save(Canvas.ALL_SAVE_FLAG);63 canvas.restore();64 65 66 return bitmap;67 }68 69 }
原标题:简单的为图片添加水印
关键词:图片