Android newbie learning dialogs = CRASH

I'm trying to learn custom dialogs. I made one with a button in it and it comes up fine and I can hit breakpoints in the constructor and onCreate method, but when I click the button it crashes without ever getting to the button handler.

The dialog layout XML (my_dialog_layout.xml) is:

<?xml version="1.0" encoding="utf-8"?>
     android:text="Click Me"
  <TextView android:id="@+id/text"
    android:text="Click this button: " 

... and the Dialog's java file is:

import android.os.Bundle;
import android.widget.Toast;
import android.view.View;
import android.content.Context; 

public class MyDialog extends Dialog {

    public MyDialog(Context context) {

    public void AButtonHandler(View target) {
        int i = 0;   // just a placeholder to set a breakpoint at
        i++;         //   "                 "
//       Toast.makeText(this, "in AButtonHandler", Toast.LENGTH_LONG).show();

    public void onCreate(Bundle savedInstanceState) {
  //      Toast.makeText(this, "Dialog onCreate", Toast.LENGTH_LONG).show();

When I click AButton it crashes in the debugger before getting to my breakpoint in AButtonHandler with " Thread [<1> main] (Suspended (exception IllegalStateException)) View$1.onClick(View) line: 2059 Button(View).performClick() line: 2408 ..."

Also notice the commented-out Toast's. I wanted to put Toasts in but thye compiler gives me: The method makeText(Context, CharSequence, int) in the type Toast is not applicable for the arguments (MyDialog, String, int) What am I doing wrong?

Thanks in advance!


Second problem: A Dialog is not a Context. It has a Context. Use Toast.makeText(getContext(), ...).

First problem: Same thing. The method needs to be in the activity, not the dialog. (I should mention that I never tried onClick in a dialog. You may need to use a traditional OnClickListener.)

Side note: Function names should start with lower case.

Need Your Help

JConsole location in Linux

java linux jvm jconsole java-home

I am trying to run jconsole from my machine but I can't find the location of the .sh . I have tried finding it in different directories and setting JAVA_HOME to the jdk.

:: versus . for member functions (C++)

c++ oop

I know that, given a class, say, std::array, which has a member function, say, size(), we can call on that member function via a ".", that is, in the following code,

About UNIX Resources Network

Original, collect and organize Developers related documents, information and materials, contains jQuery, Html, CSS, MySQL, .NET, ASP.NET, SQL, objective-c, iPhone, Ruby on Rails, C, SQL Server, Ruby, Arrays, Regex, ASP.NET MVC, WPF, XML, Ajax, DataBase, and so on.