- import android.os.Bundle;
- import android.widget.ImageView;
- import android.app.Activity;
- import android.graphics.Bitmap;
- import android.graphics.Canvas;
- import android.graphics.Color;
- import android.graphics.Paint;
- import android.graphics.drawable.BitmapDrawable;
- import android.graphics.drawable.Drawable;
- public class MainActivity extends Activity {
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- ImageView iv = (ImageView) findViewById(R.id.imageView);
- //为简单期间,就使用Android原生的小机器人为目标图片
- Drawable drawable = getResources().getDrawable(R.drawable.ic_launcher);
- // Drawable -> Bitmap:Drawable 转换成 Bitmap。
- BitmapDrawable bd = (BitmapDrawable) drawable;
- Bitmap bmp = bd.getBitmap();
- // 为Bitmap添加水印
- Bitmap bitmap = createWatermark(bmp, "@ Zhang Phil");
- iv.setImageBitmap(bitmap);
- }
- // 为图片target添加水印文字
- // Bitmap target:被添加水印的图片
- // String mark:水印文章
- private Bitmap createWatermark(Bitmap target, String mark) {
- int w = target.getWidth();
- int h = target.getHeight();
- Bitmap bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
- Canvas canvas = new Canvas(bmp);
- Paint p = new Paint();
- // 水印的颜色
- p.setColor(Color.RED);
- // 水印的字体大小
- p.setTextSize(10);
- p.setAntiAlias(true);// 去锯齿
- canvas.drawBitmap(target, 0, 0, p);
- // 在左边的中间位置开始添加水印
- canvas.drawText(mark, 0, h / 2, p);
- canvas.save(Canvas.ALL_SAVE_FLAG);
- canvas.restore();
- return bmp;
- }
- }
来源: http://www.phpxs.com/code/1002071/