I just started to learn Java. I know some C++, but you know, I am just a novice. I have a problem with a button. I a main activity there are 3 buttons with onClick discovered by switch. By clicking on one of the buttons you're redirected to another activity where I need to create a new button.
The code responsible for MainScreen buttons looks like this (and it works):
public class MainScreen extends Activity implements View.OnClickListener {
Button act_2x2, act_3x3, act_4x4;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_screen);
act_2x2 = (Button) findViewById(R.id.Activity_2x2);
act_3x3 = (Button) findViewById(R.id.Activity_3x3);
act_4x4 = (Button) findViewById(R.id.Activity_4x4);
act_2x2.setOnClickListener(this);
act_3x3.setOnClickListener(this);
act_4x4.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch(view.getId())
{
case R.id.Activity_2x2:
Intent inent1 = new Intent(this, macierz_2x2.class);
startActivity(inent1);
break;
case R.id.Activity_3x3:
Intent inent2 = new Intent(this, macierz_3x3.class);
startActivity(inent2);
break;
case R.id.Activity_4x4:
Intent inent3 = new Intent(this, macierz_4x4.class);
startActivity(inent3);
break;
}
And it is okay, I can normally enter the new activity, for example Activity_2x2. Here, in 2x2 class I've created a new OnClickListener and when I click on it, nothing happens. I am sitting here for two hours with debugger, it is saying that I don't have permissions, but It is impossible, because it is just a simple button. I am using Android Studio and just don't know how to debug correctly.
Here is the definition:
public class macierz_2x2 extends MainScreen implements View.OnClickListener{
Button b_2x2;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_2x2);
b_2x2 = (Button) findViewById(R.id.button_2x2);
b_2x2.setOnClickListener(this);
}
public void OnClick(View view) { what happens after clicking }
I know, that this problem is somewhere in overriding and extending, but no idea, why the compiller is letting this being compiled.
If someone have any idea, I will be grateful.
ps. I don't need an answer, just a point, what is wrong.
public class macierz_2x2 extends MainScreen implements View.OnClickListener{
MainScreen already implements View.OnClickListener. Remove it from the definition of your class.
public class macierz_2x2 extends MainScreen {
is enough. You can override onClick on your macierz_2x2 activity
@Override
public void onClick(View view) {
switch(view.getId()) {
R.id.button_2x2:
// do something
break;
default:
super.onClick(view);
break;
}
}
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