使用场景

截图指定组件区域

  1. "ui";
  3. ui.layout(
  4.     <frame>
  6.         <vertical gravity="center" id="all">
  7.             <button text="截图这个按钮" id="截图" w="*" h="*" margin="0" padding="0" />
  8.         </vertical>
  9.     </frame>
  11. )
  14. ui.选择.on("click", function () {
  16.     var path = saveImage(ui.截图, files.getSdcardPath() + "/preview.png")
  17.     log(path)
  18. })
  20. importClass(android.graphics.Bitmap)
  21. importClass(android.view.View)
  22. importClass(android.graphics.Rect)
  23. importClass(java.io.FileOutputStream)
  24. importClass(android.os.Environment)
  26. // 获取状态栏高度
  27. const resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
  28. const statusBarHeight = context.getResources().getDimensionPixelSize(resourceId);
  30. /**
  31.  * 生成视图的预览
  32.  * @param View v 控件
  33.  * @param Paht path 保存路径
  34.  * 
  35.  * @return  视图生成失败返回false
  36.  *          视图生成成功返回true
  37.  */
  38. function saveImage(v, path) {
  39.     let bitmap;
  40.     let view = activity.getWindow().getDecorView();
  41.     view.setDrawingCacheEnabled(true);
  42.     view.buildDrawingCache();
  43.     bitmap = view.getDrawingCache();
  44.     let frame = new Rect();
  45.     activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
  47.     try {
  48.         var location = [v.getX(), v.getY()];
  49.         v.getLocationOnScreen(location);
  50.         bitmap = Bitmap.createBitmap(bitmap, location[0], location[1] + statusBarHeight, v.getWidth(), v.getHeight()); //Bitmap source：要从中截图的原始位图，int x:起始x坐标，int y：起始y坐标，int width：要截的图的宽度，int height：要截的图的宽度
  51.         let fout = new FileOutputStream(path);
  52.         bitmap.compress(Bitmap.CompressFormat.PNG, 100, fout);
  53.         return true;
  54.     } catch (e) {
  55.         // e.printStackTrace();
  56.         console.error("生成预览图片失败：" + e);
  57.     } finally {
  58.         // 清理缓存
  59.         view.destroyDrawingCache();
  60.     }
  61.     return false;
  63. }