Android Dialog NoSuchMethodException Error When Using XML OnClick

I'm new to Java and Android, and I'm working on my first test app. I've progressed with it, but I'm blocked with a Dialog. I show the dialog from the Activity like this: //BuyActiv

Solution 1:

You are trying to call the method "Action_ShowDialog_Buy", but this method doesn't exist in the Dialog object! This method should not be in the Activity, if you specify it in the xml. If you want to handle the click in the Activity, you should set the onClickListener programatically:

Button b=(Button)BuyDialog.findViewById(R.id.Button_Buy);
b.setOnClickListener(new OnClickListener(){
    @Override
    onClick(View v){
      BuyDialog.dismiss();
    }

});

Solution 2:

and below:

Caused by: java.lang.NoSuchMethodException:BuyActivity.ActionShowDialog_Buy

lock at this ActionShowDialog_Buy you forget simbol _ in name of the method

Solution 3:

You have to use set clickable true in your xml file.

<!-- dialog_buy.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >

    <!-- Other stuff -->

        <Button
            android:id="@+id/Button_Buy"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/Some_Other_Stuff"
            android:layout_centerHorizontal="true"
            android:text="@string/button_buy"
            android:onClick="Action_ShowDialog_Buy"
            android:clickable="true" />

        </RelativeLayout>

Solution 4:

Thanks to everyone that tried to help.

I've managed to sort this out by creating a class derived from Dialog and using it, using this code:

import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.widget.RelativeLayout;

public class BuyDialogClass extends Dialog
{

//Ensure this Dialog has a Context we can use
Context mContext ;

public BuyDialogClass(Context context) {
    super(context);
    mContext=context; //Store the Context as provided from caller
}

@Override
 protected void onCreate(final Bundle savedInstanceState)
 {
  super.onCreate(savedInstanceState);
  RelativeLayout ll=(RelativeLayout) LayoutInflater.from(mContext).inflate(R.layout.dialog_buy, null);
  setContentView(ll); 
 }

}

This allowed me to call the dialog as this:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_shop);

    initialize_PR();
    display_PR();
    BuyDialog=new BuyDialogClass(this);
    //The setContentView is not necessary here as we call it on the onCreate

    //We can NOT access Dialog widgets from here,
    //because the dialog has not yet been shown.

}
public void Action_ShowDialog_Buy(View view) {
    BuyDialog.show() ;

    //NOW, after showing the dialog, we can access its widgets
    jobject_SeekBar_buy= (SeekBar) BuyDialog.findViewById(R.id.SeekBar_Dialog_Buy) ;
    jobject_SeekBar_buy.setMax(PR_num_coins/currentPR_buy_price) ;
    jobject_SeekBar_buy.setOnSeekBarChangeListener(this);

}
public void Action_Buy_PR(View view) {
    BuyDialog.dismiss() ;
}

I managed to do this by reading Using onClick attribute in layout xml causes a NoSuchMethodException in Android dialogs but I still do not understand this Context issue.

Solution 5:

Dialog uses ContextThemeWrapper

Now, exception we are getting...

java.lang.IllegalStateException: Could not find a method android:onClick="method" 
in the activity class android.view.ContextThemeWrapper
for onClick handler on view class android.widget.RadioButton with id 'statusSuspend'

To get rid of this just use proper inflater

LayoutInflater.from(context) instead

1. ((LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE))

2. getLayoutInflater()

Avoid void setContentView(int layoutResID) instead use void setContentView(View view)

And use same context in Dialog constructor i.e super(context)

At last please don't forget to define android:onClick="method" in Activity instead in your custom class