MainActivity.java 文件源码

public void crossLineButtonClick(View view){
    Path path = new Path();
    path.moveTo(0, 12);
    path.lineTo(100, 88);

    ShapeBackgroundSpan shapeSpan = new ShapeBackgroundSpan(0xFF000000, new PathShape(path, 100, 100), true);
    shapeSpan.setStrokeWidth(6);

    textView.setSelectionSpan(shapeSpan, new ArrowBackgroundSpan(0xFF7373, 0x22000000));
}