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Android studio “SDK tools directory is missing”

Following 2 possible solutions will resolve this problem :  Solution1 : To fix the problem, it was required that I list the path to my corporate PAC file by using  Configure -> "Appearance and Behavior" -> System Settings -> HTTP Proxy . I selected "Automatic proxy configuration url:" Delete your  ~/.Android*  folders (losing all of your settings :/). Run Android Studio. It will show you a welcome wizard where it tries to download the SDK again (and fails due to my rubbish internet). Click the X on the wizard window. That will enable you to get to the normal welcome dialog. Go to Settings->Project Defaults->Project Structure and change the Android SDK location to the correct one. Solution 2 : To fix the problem, it was required that I list the path to my corporate PAC file by using  Configure -> "Appearance and Behavior" -> System Settings -> HTTP Proxy . I selected "Automatic proxy configuration url:&quo
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Code to check is SDCard exists or not in Android Device,Android



if (android.os.Environment.getExternalStorageState().equals(
                                android.os.Environment.MEDIA_MOUNTED)){
                               
                        Intent i =new Intent(AddJobScreen.this,FilesListScreen.class);
                        startActivity(i);
                        }else{
                            SharedVariables.showAlertMessage(SharedVariables.globalContext.getString(R.string.no_sdcard_msg), AddJobScreen.this);                           
                        }


Here i checked is SDCard exists or not,
a)if it was not exists then i showed an alert message..
b) if it exists i called an Activity..

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