If you want to export the sqlite db into .csv  or .pdf. You are going use the following libraries OPENCSV-2.3.jar iTextPDF – 5.2.1.jar Task of Creating CSV public class ExportCSVTask extends AsyncTask<String, Void, Boolean> {            private final ProgressDialog dialog = new ProgressDialog(                      MainActivity.this);            protected void onPreExecute() {                 this.dialog.setMessage("Exporting database...");                 this.dialog.show();            }            @...

Java TextView link; link = (TextView) findViewById(R.id.link); link.setMovementMethod(LinkMovementMethod.getInstance()); Strings.xml <string name="link_google"><u><a href="http://google.co.in">Go to Google</a></u></string> mainActivity.xml <TextView         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:textColor="#80BFFF"         android:text="@string/link_google"         android:id="@+id/link"         android:layout_gravity="center_vertical"         />

If you are splitting the string value, you just use the method, public String splitString(String s) {          return new LinkedHashSet<String>(Arrays.asList(s.split(", "))).toString().replaceAll("(^\\[|\\]$)", "").replace(",", ", ");      } Reference: LinkedHashSet

If you want to know the other app is installed or not, just using PackageManager . public boolean appInstalledOrNot(String uri) { PackageManager pm = getPackageManager(); boolean app_installed = false; try { pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES); app_installed = true; } catch (PackageManager.NameNotFoundException e) { app_installed = false; } return app_installed; } String uri means package name like com.example.app.  if(appInstalledOrNot(com.example.app)==false){ <-- app is not installed--> } else{ <-- app is installed--> }