When click on the button the application crash

Question

I'm new with android and I have created a new activity with some radio buttons, but when I click on the button the application crash and It give me some errors, I tried to find some information on some errors but I can't find the problem.

This is my XML Code

<TextView 
    android:text="@string/gps_location"
    android:id="@+id/lbl_gps_location"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" 
    android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText 
    android:id="@+id/txtGpsLocationEntry"
    android:hint="@string/gpsLocationHint"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

<TextView
    android:id="@+id/lblAmountTraffic"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="40dp"
    android:text="@string/amount_traffic"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<RadioGroup 
    android:id="@+id/rbAmountTraffic"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

  <RadioButton
      android:id="@+id/rbModerate"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/moderate" />

      <RadioButton
      android:id="@+id/rbHeavy"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/heavy" />

  <RadioButton
      android:id="@+id/rbStandstill"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/standstill" />
</RadioGroup>

<TextView
    android:id="@+id/lblDirections"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="40dp"
    android:text="@string/directions"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<RadioGroup 
    android:id="@+id/rbDirections"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

  <RadioButton
      android:id="@+id/rbNorth"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/north" />

      <RadioButton
      android:id="@+id/rbSouth"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/south" />
</RadioGroup>

<Button 
    android:id="@+id/btnSubmit"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/submit" 
    android:onClick="insertTrafficData"/>
 </LinearLayout>

This is my activity code

double latitude;
    double longitude;
    LatLng location;
    Geocoder geocoder;  

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_add_accident);

        //Get action bar
        ActionBar actionBar = getActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true); // Enabling up/ Back navigation

        // show the action bar
        actionBar.show();
        Bundle bundle = getIntent().getExtras();
        latitude = bundle.getDouble("latitude");
        longitude = bundle.getDouble("longitude");

        location = new LatLng(latitude,longitude);

        try {

             List<Address> addresses;
             geocoder = new Geocoder(getApplicationContext(), Locale.getDefault());
             addresses = geocoder.getFromLocation(latitude, longitude, 1);

             String address = addresses.get(0).getAddressLine(0);
             String city = addresses.get(0).getAddressLine(1);
             String country = addresses.get(0).getAddressLine(2);

             EditText text = (EditText) findViewById(R.id.txtGpsLocationEntry);
            text.setText(address + " " + city + " " + country);


            TextView text2 = (TextView) findViewById(R.id.lbl_gps_location);
            text2.setText(address + " " + city + " " + country);
            Toast.makeText(getApplicationContext(), address + " " + city + " " + country, 2).show();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }


    public void insertTrafficData(View view){

        try{

            DBTraffic db = new DBTraffic();

            RadioButton amountTraffic = (RadioButton) findViewById(R.id.rbAmountTraffic);
            RadioButton direction = (RadioButton) findViewById(R.id.rbDirections);

            db.insertTraffic(getApplicationContext(), location, amountTraffic.toString(), direction.toString());
        }catch(Exception e){
            e.printStackTrace();
        }

    }

And these are the errors:

01-02 20:05:49.411: E/AndroidRuntime(25558): FATAL EXCEPTION: main
01-02 20:05:49.411: E/AndroidRuntime(25558): java.lang.IllegalStateException: Could not find a method InsertTrafficData(View) in the activity class com.example.maltatraffic.AddTraffic for onClick handler on view class android.widget.Button with id 'btnSubmit'
01-02 20:05:49.411: E/AndroidRuntime(25558):    at android.view.View$1.onClick(View.java:3601)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at android.view.View.performClick(View.java:4107)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at android.view.View$PerformClick.run(View.java:17160)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at android.os.Handler.handleCallback(Handler.java:615)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at android.os.Handler.dispatchMessage(Handler.java:92)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at android.os.Looper.loop(Looper.java:155)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at android.app.ActivityThread.main(ActivityThread.java:5536)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at java.lang.reflect.Method.invokeNative(Native Method)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at java.lang.reflect.Method.invoke(Method.java:511)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1074)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:841)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at dalvik.system.NativeStart.main(Native Method)
01-02 20:05:49.411: E/AndroidRuntime(25558): Caused by: java.lang.NoSuchMethodException: InsertTrafficData [class android.view.View]
01-02 20:05:49.411: E/AndroidRuntime(25558):    at java.lang.Class.getConstructorOrMethod(Class.java:460)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at java.lang.Class.getMethod(Class.java:915)
01-02 20:05:49.411: E/AndroidRuntime(25558):    at android.view.View$1.onClick(View.java:3594)
01-02 20:05:49.411: E/AndroidRuntime(25558):    ... 11 more

Can please someone help me.

Answer 1

I'm pretty sure there are a bunch of buggy problems with using the XML to define an onClick method. I would suggest two possible solutions:

• According to this solution you should try cleaning the project in Eclipse. If that doesn't work, they said the final solution was to delete the emulator to get it working.
• The other solution would be to implement a onClick handler in the onCreate method of the activity for the button. An example is shown here.

Answer 2

Java is case-sensitive in your code the method is starts with lower-case:

insertTrafficData(View)

and on XML you have (I guess):

InsertTrafficData(View)

Answer 3

To avoid this kind of exceptions, you should implement onClickListener and override the onClick function, than assign listener to your button.

Answer 4

I'm guessing you're defining an onClick() in your xml that doesn't match a method in your Activity. Did you define InsertTrafficData(View) in com.example.maltatraffic.AddTraffic?

I looked closer, it looks like in XML you use 'InsertTrafficData' but in your activity it's 'insertTrafficData'. Those must be identical, check your case.