Android之给图片添加水印效果

原图：

Android之给图片添加水印效果_第1张图片

效果图：

Android之给图片添加水印效果_第2张图片

参考代码如下：

public class MainActivity extends Activity {private Button btn_start;private ImageView img;private Bitmap bitmap;private Bitmap wbitmap;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.image_layout);initView();}private void initView() {img = (ImageView) findViewById(R.id.iv_image);bitmap = ((BitmapDrawable) img.getDrawable()).getBitmap();wbitmap=((BitmapDrawable)getResources().getDrawable(R.drawable.img_label_user)).getBitmap();btn_start = (Button) findViewById(R.id.btn_start);btn_start.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Bitmap bm = ImageTools.Watermark(bitmap,wbitmap,100);img.setImageBitmap(bm);}});}}

ImageTools工具类：

/** * 水印 * @param src 添加水印的图 * @param watermark 水印图 * @param alpha 水印的透明度 * @return */public static Bitmap Watermark(Bitmap src, Bitmap watermark,int alpha) {if (src == null) {return null;}int w = src.getWidth();int h = src.getHeight();int ww = watermark.getWidth();int wh = watermark.getHeight();Paint paint=new Paint();paint.setAlpha(alpha);paint.setAntiAlias(true);Bitmap newb = Bitmap.createBitmap(w, h, Config.ARGB_8888);Canvas cv = new Canvas(newb);cv.drawBitmap(src, 0, 0, null);cv.drawBitmap(watermark, 0, h/2, paint);cv.save(Canvas.ALL_SAVE_FLAG);cv.restore();return newb;}

转载请注明出处：http://blog.csdn.net/hai_qing_xu_kong/article/details/45220425 情绪控_

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