setLayoutParams on Inherited View

Question

Am having trouble with my android application. I wanna create a new View by doing this :

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);


}

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    LinearLayout l = (LinearLayout)findViewById(R.id.mainActivity);
    f = new InheritedView(this);
    f.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT));
    l.addView(f);
}

With

public class InheritedView extends ImageView implements AbstractView 

public InheritedView(Context context) {
    super(context);
}

But when I test that, my app crash with java.lang.StackOverflowError when executing setLayoutParams(..). However, the following works :

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
}

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    LinearLayout l = (LinearLayout)findViewById(R.id.mainActivity);
    f = new ImageView(this);
    f.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT));
    l.addView(f);
}

LOGCAT File

FATAL EXCEPTION: main Process: fr.cameleoz.nemo, PID: 30304 java.lang.StackOverflowError at fr.cameleoz.nemo.business.factories.nemoviews.impl.InheritedView.setLayoutParams(InheritedView.java:32) at fr.cameleoz.nemo.business.factories.nemoviews.impl.InheritedView.setLayoutParams(InheritedView.java:32) at fr.cameleoz.nemo.business.factories.nemoviews.impl.InheritedView.setLayoutParams(InheritedView.java:32) at fr.cameleoz.nemo.business.factories.nemoviews.impl.InheritedView.setLayoutParams(InheritedView.java:32) at fr.cameleoz.nemo.business.factories.nemoviews.impl.InheritedView.setLayoutParams(InheritedView.java:32) at fr.cameleoz.nemo.business.factories.nemoviews.impl.InheritedView.setLayoutParams(InheritedView.java:32) at fr.cameleoz.nemo.business.factories.nemoviews.impl.InheritedView.setLayoutParams(InheritedView.java:32) at fr.cameleoz.nemo.business.factories.nemoviews.impl.InheritedView.setLayoutParams(InheritedView.java:32) at fr.cameleoz.nemo.business.factories.nemoviews.impl.InheritedView.setLayoutParams(InheritedView.java:32) at [...]

Can you explain me why? Thanks

have you tried to switch the addView and setLayoutParams line? — Blackbelt, Jun 18 '14 at 15:15
I have. It crashes beacause of the lack of essential parameters I guess... — Noémie O'connor, Jun 18 '14 at 15:18
There's got to be something coming up in the logcat. An app won't just crash for no reason. — Andrew Schuster, Jun 18 '14 at 15:22
I didn't instanciate f with the same Class in the working/not working. There's the difference : new InheritedView(this) / new ImageView(this). — Noémie O'connor, Jun 18 '14 at 15:43
Looks like you're overridden `setLayoutParams()` with a version that recursively calls itself until the stack is exhausted. Please post more of your custom class code. — laalto, Jun 18 '14 at 15:51

score 0 · Accepted Answer · answered Jun 18 '14 at 15:54

0

Based on the stacktrace, your InheritedView overrides setLayoutParams() and the overridden method calls itself.

Each nested method call takes up some stack space and this infinite recursion only gets terminated when the stack runs out.

answered Jun 18 '14 at 15:54

laalto

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True! I would have never thought... Thank you very much! – Noémie O'connor Jun 18 '14 at 16:01

setLayoutParams on Inherited View

1 Answers1