public class MainActivity extends AppCompatActivity {  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    ImageView iv = (ImageView) findViewById(R.id.imageView);    Drawable drawable = ContextCompat.getDrawable(this, R.drawable.image);    BitmapDrawable bd = (BitmapDrawable) drawable;    Bitmap bmp = bd.getBitmap();    Bitmap bitmap = createWatermark(bmp, "葉應是葉" + "http://blog.csdn.net/new_one_object");    iv.setImageBitmap(bitmap);  }  private Bitmap createWatermark(Bitmap bitmap, String mark) {    int w = bitmap.getWidth();    int h = bitmap.getHeight();    Bitmap bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);    Canvas canvas = new Canvas(bmp);    Paint p = new Paint();    // 水印顏色    p.setColor(Color.parseColor("#c5576370"));    // 水印字體大小    p.setTextSize(150);    //抗鋸齒    p.setAntiAlias(true);    //繪制圖像    canvas.drawBitmap(bitmap, 0, 0, p);    //繪制文字    canvas.drawText(mark, 0, h / 2, p);    canvas.save(Canvas.ALL_SAVE_FLAG);    canvas.restore();    return bmp;  }}