I wanted to try out WizarDroid library in my app. But since I am fairly inexperienced with inflators I got stuck on this error for hours.
I get a NullPointerException while trying to findViewById and I can't figure out why.
public class WizardStep1 extends WizardStep {
//Wire the layout to the step
public WizardStep1() {
}
//Set your layout here
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.wizard, container, false);
TextView tv = (TextView) v.findViewById(R.id.wizard_textView); // tv = null
tv.setText("This is an example of Step 1 in the wizard. Press the Next " + // NullPointerException gets thrown here
"button to proceed to the next step. Hit the back button to go back to the calling activity.");
return v;
}
}
So TextView tv is null for some reason. I can't figure this out because I clearly defined it in XML R.layout.wizard
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/wizard_textView"
android:layout_marginTop="10dp"
android:textSize="20dp"
android:text="gtsets" />
</LinearLayout>
This code is also from their documentation so it just further confuses me :/
Edit: Here's wizardStartup class :
public class wizardStartup extends BasicWizardLayout {
/**
* Note that initially BasicWizardLayout inherits from {@link android.support.v4.app.Fragment} and therefore you must have an empty constructor
*/
public wizardStartup() {
super();
}
//You must override this method and create a wizard flow by
//using WizardFlow.Builder as shown in this example
@Override
public WizardFlow onSetup() {
/* Optionally, you can set different labels for the control buttons
setNextButtonLabel("Advance");
setBackButtonLabel("Return");
setFinishButtonLabel("Finalize"); */
return new WizardFlow.Builder()
.addStep(WizardStep1.class) //Add your steps in the order you want them
.addStep(WizardStep2.class) //to appear and eventually call create()
.create(); //to create the wizard flow.
}
}
LogCat :
07-15 17:58:05.491 10299-10299/ba.imasoft.dfms.app E/AndroidRuntime﹕ FATAL EXCEPTION: main java.lang.NullPointerException at ba.imasoft.dfms.app.wizards.steps.WizardStep1.onCreateView(WizardStep1.java:28)
Line 28 is 'tv.setText("This'..
If I comment out the lines that contain tv variable It works but not the way It's supposed to.. I need to edit the view for each step.
tv = null proof...
