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 本帖最后由 haiyin 于 2021-12-1 16:40 编辑  
 
https://pan.baidu.com/s/18cucnm_Ix4ynXpPmgdgtLg  https://pan.baidu.com/s/1ILVwsEHox2mYM2X2S9YFzA https://blog.csdn.net/weixin_44543103/article/details/121392291 
 
 
 
 
 
 
 
 
https://blog.csdn.net/weixin_44767769/article/details/104660925 
 
maven{ url "https://maven.aliyun.com/nexus/content/groups/public/" } 
maven{ url "https://maven.aliyun.com/nexus/content/groups/public/" } 
 
 
https://www.runoob.com/java/java-environment-setup.html 
 
 
 
 
 
 
 
 
 
二、如果出现下图所示警告,说明SDK Platforms中对应的android版本API没有安装 
 
 
 
 
 
 
app:areaBackground="@mipmap/rocker_base" 
         app:rockerBackground="@mipmap/rocker" 
app:areaBackground="@mipmap/rocker_base" 
         app:rockerBackground="@mipmap/rocker" 
 
 
 
Resources resources = MainActivity.this .getResources ( ) ;
        Drawable qxrd = resources.getDrawable ( R.drawable .qxrd ) ;
        Drawable qx = resources.getDrawable ( R.drawable .qx ) ;
        Drawable qdrd = resources.getDrawable ( R.drawable .qdrd ) ;
        Drawable qd = resources.getDrawable ( R.drawable .qd ) ;
Resources resources = MainActivity.this .getResources ( ) ;
        Drawable qxrd = resources.getDrawable ( R.drawable .qxrd ) ;
        Drawable qx = resources.getDrawable ( R.drawable .qx ) ;
        Drawable qdrd = resources.getDrawable ( R.drawable .qdrd ) ;
        Drawable qd = resources.getDrawable ( R.drawable .qd ) ;