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：
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