如何用NJS获取手机桌面壁纸？

分类：Native.js

uniapp NJS

我找到的JAVA原生代码：
//获取布局
LinearLayout layout = (LinearLayout) this.findViewById(R.id.ll);
//获取WallpaperManager 壁纸管理器
WallpaperManager wallpaperManager = WallpaperManager.getInstance(this); // 获取壁纸管理器
// 获取当前壁纸
Drawable wallpaperDrawable = wallpaperManager.getDrawable();
//将Drawable,转成Bitmap
Bitmap bm = ((BitmapDrawable) wallpaperDrawable).getBitmap();

    float step = 0;  
    //计算出屏幕的偏移量  
    step = (bm.getWidth() - 480) / (7 - 1);  
    //截取相应屏幕的Bitmap  
    Bitmap pbm = Bitmap.createBitmap(bm, (int) (5 * step), 0, 480, 854);  
    //设置 背景  
    layout.setBackgroundDrawable(new BitmapDrawable(pbm));

用NJS转换，到这一行卡住了：Bitmap bm = ((BitmapDrawable) wallpaperDrawable).getBitmap();
求助！这一行有个强制转换，该如何转换啊？

2022-10-11 11:41 负责人:无分享