title: Android Studio: Try-catch exception crashes application
body: <p>I was testing some vulnerabilities inside of my code and trying to fix them by throwing an exception when the user has an invalid input. Now when I implement a try-catch and run the application on my phone, it crashes when I put in that invalid input. </p>
  
  <p>I assume my code doesn't catch the exception from the addData method. Is there another way to implement exceptions or how can I make it possible to catch the exception from the addData method?</p>
  
  <pre><code>package com.odisee.photoboothapp;
  
  import android.support.v7.app.AppCompatActivity;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.Button;
  import android.widget.RadioButton;
  import android.widget.RadioGroup;
  import android.widget.EditText;
  import android.widget.Toast;
  
  import com.odisee.photoboothapp.fontchanger.FontChangeTextView;
  
  public class Form_Database extends AppCompatActivity {
  DatabaseHelper myDb;
  
  int selectedId;
  RadioGroup test;
  RadioButton editEducation;
  EditText editName, editSurname, editEmail;
  Button btnAddData;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) throws IllegalArgumentException {
      super.onCreate(savedInstanceState);
      getSupportActionBar().hide();
      setContentView(R.layout.activity_form__database);
  
      myDb = new DatabaseHelper(this);
  
      test = (RadioGroup)findViewById(R.id.radioButtonChoice);
  
      editName = (EditText)findViewById(R.id.edit_Name);
      editSurname = (EditText)findViewById(R.id.edit_Surname);
      editEmail = (EditText)findViewById(R.id.edit_Email);
  
  
      btnAddData = (Button)findViewById(R.id.btnSend);
      try {
          addData();
      }
      catch(IllegalArgumentException e) {
          Toast.makeText(Form_Database.this,"Data not inserted" + e.getMessage(),Toast.LENGTH_LONG).show();
      }
  }
  
  public void addData() {
      btnAddData.setOnClickListener(
              new View.OnClickListener() {
                  @Override
                  public void onClick(View v) {
                          if(editName.getText().toString().contains("DROP")) {
                              throw new IllegalArgumentException("SQL Exceptie!");
                          }
                          else {
  
                              selectedId = test.getCheckedRadioButtonId();
                              editEducation = (RadioButton)findViewById(selectedId);
                              boolean isInserted = myDb.insertData(editName.getText().toString(), editSurname.getText().toString(), editEmail.getText().toString(), editEducation.getText().toString());
  
                              sendEmail();
  
                              if(isInserted == true) {
                                  Toast.makeText(Form_Database.this,"Data inserted",Toast.LENGTH_LONG).show();
                              }
                              else {
                                  Toast.makeText(Form_Database.this,"Data not inserted",Toast.LENGTH_LONG).show();
                              }
                          }
                  }
              }
      );
  }
  
  public void sendEmail() {
      //Getting content for email
      String email = editEmail.getText().toString();
      String subject = "testberichtje voor lorenzo";
      String message = "testberichtje voor lorenzo";
  
      //Creating SendMail object
      SendMail sm = new SendMail(this, email, subject, message);
  
      //Executing sendmail to send email
      sm.execute();
  }
  
  }
  </code></pre>
  
  <blockquote>
    <p>05-01 17:58:17.021 30232-30232/com.odisee.photoboothapp E/AndroidRuntime: FATAL EXCEPTION: main
                                                                              Process: com.odisee.photoboothapp, PID: 30232
                                                                              java.lang.IllegalArgumentException: SQL Exceptie!
                                                                                  at com.odisee.photoboothapp.Form_Database$1.onClick(Form_Database.java:55)
                                                                                  at android.view.View.performClick(View.java:5697)
                                                                                  at android.widget.TextView.performClick(TextView.java:10826)
                                                                                  at android.view.View$PerformClick.run(View.java:22526)
                                                                                  at android.os.Handler.handleCallback(Handler.java:739)
                                                                                  at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                                  at android.os.Looper.loop(Looper.java:158)
                                                                                  at android.app.ActivityThread.main(ActivityThread.java:7224)
                                                                                  at java.lang.reflect.Method.invoke(Native Method)
                                                                                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
                                                                                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)</p>
  </blockquote>