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Android Build a Simple Android App (2014) Basic Android Programming Adding the onClick() Method

Unable to start activity ComponentInfo{biz.appfarm.funfacts/biz.appfarm.funfacts.FunFacts}: java.lang.ClassCastException

/* Declare view variables and assign the view from the layout file */ final TextView factLabel = (TextView) findViewById(R.id.factTextView); Button showFactButton = (Button) findViewById(R.id.showFactButton); View.OnClickListener listener = new View.OnClickListener() { @Override public void onClick(View view) { // the button was clicked so update the facts String fact = "Ostriches can run faster than "; factLabel.setText(fact); } }; showFactButton.setOnClickListener(listener);


1 Answer

Ben Deitch
Ben Deitch
Treehouse Teacher

Your RelativeLayout has the same id as your button - android:id="@+id/showFactButton"

Try removing the id from your RelativeLayout

thank you very much Ben, worked!