Stamper is a tool for stamping a pattern into a picture,it likes a watermark.

Stamper是一个给图片打水印的工具，支持图片水印和文字水印，水印位置可以任意调节。

效果图：

1

2

实现原理：

Stamper将原图当作画布，把水印图或者文字画入原图中。生成bitmap。

Stamper使用方法：

1.添加依赖

Step 1. Add the JitPack repository to your build file; Add it in your root build.gradle at the end of repositories:

allprojects {

        repositories {

        ...

        maven { url 'https://jitpack.io' }

        }

        }

Step 2. Add the dependency

dependencies {

        implementation 'com.github.KernHu:Stamper:1.1'

}

2.代码部分：

1.use it stamp a text;

Bitmap bitmap3 = BitmapFactory.decodeResource(getResources(), R.drawable.sample_plot_3);

Stamper.with(MainActivity.this)

      .setLabel("National Geography")

      .setLabelColor(getResources().getColor(R.color.theme))//Color.rgb(255, 60, 70)

      .setLabelSize(60)

      .setMasterBitmap(bitmap3)

      .setStampType(StampType.TEXT)

      .setStampPadding(new StampPadding(bitmap3.getWidth() / 4, bitmap3.getHeight() / 6))

      .setStampWatcher(mStampWatcher)

      .setRequestId(1001)

      .build();

2.use it stamp a image;

Bitmap bitmap4 = BitmapFactory.decodeResource(getResources(), R.drawable.sample_plot_4);

Bitmap watermark = BitmapFactory.decodeResource(getResources(), R.drawable.ic_watermark);

Stamper.with(MainActivity.this)

      .setMasterBitmap(bitmap4)

      .setWatermark(watermark)

      .setStampType(StampType.IMAGE)

      .setStampPadding(new StampPadding(bitmap4.getWidth() - watermark.getWidth() - 40, 40))

      .setStampWatcher(mStampWatcher)

      .setRequestId(1002)

      .build();

3.the callback

StampWatcher mStampWatcher = new StampWatcher() {

        @Override

        protected void onSuccess(Bitmap bitmap, int requestId) {

            super.onSuccess(bitmap, requestId);

            switch (requestId) {

                case 1001:

                    //the result of text stamper

                    break;

                case 1002:

                    //the result of image stamper

                    break;

            }

        }

        @Override

        protected void onError(String error, int requestId) {

            super.onError(error, requestId);

            switch (requestId) {

                case 1001://

                    break;

                case 1002://

                    break;

            }

        }

    };

完成代码见github：

https://github.com/KernHu/Stamper