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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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sample code to Display all installed applications in Our Device in Android

final PackageManager pm = getPackageManager();
        String str="com.tf.thinkdroid.amlite";
      //get a list of installed apps.
              List<ApplicationInfo> packages = pm
                      .getInstalledApplications(PackageManager.GET_META_DATA);

              for (ApplicationInfo packageInfo : packages) {

                  Log.d("TAG", "Installed package :" + packageInfo.packageName);
                  if((packageInfo.packageName).equalsIgnoreCase(str)){
                      System.out.println("*****s/w installed");
                                        break;}
                  Log.d("TAG",
                          "Launch Activity :"
                                  + pm.getLaunchIntentForPackage(packageInfo.packageName));

              }// the getLaunchIntentForPackage returns an intent that you can use with startActivity()

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