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Start your free trialTefo Temba Kebitseng
6,049 PointsAnimation and Transitions : challenge task 4 of 4 Finally, fix the onButtonClicked() method so that the mTransitionManag
public void onButtonClicked(View view) {
if (mCurrentScene == mScene2) {
mCurrentScene = mScene1;
}
else {
mCurrentScene = mScene2;
}
mTransitionManager.transitionTo(mCurrentScene);
}
I added line 18 to the code so that the onButtonClicked method is fixed to be able to transition to the current scene.I followed the example from the tutorial and still get error: java.lang.NullPointerException (Look around MainActivity.java line 18)
public class MainActivity extends Activity {
protected TransitionManager mTransitionManager;
protected Scene mScene1;
protected Scene mScene2;
protected Scene mCurrentScene;
protected TransitionSet mForwardSet;
protected TransitionSet mBackwardSet;
// Some code omitted for brevity
public void onButtonClicked(View view) {
if (mCurrentScene == mScene2) {
mCurrentScene = mScene1;
}
else {
mCurrentScene = mScene2;
}
mTransitionManager.transitionTo(mCurrentScene);
}
protected void setupTransitions() {
// These methods are setting up scenes and transitions sets like in the video
initScenes();
initSets();
// Start here!
TransitionManager mTransitionManager = new TransitionManager();
mTransitionManager.setTransition(mScene1,mScene2, mForwardSet);
mTransitionManager.setTransition(mScene2,mScene1, mBackwardSet);
mScene1.enter();
}
}
Justice Munyanyi
14,165 PointsJustice Munyanyi
14,165 PointsI used same line of code and it was accepted. Can't see even any typo.