Some devices throw a NullPointerException when launching this app, but others seem to work fine. I cannot seem to figure out what to do as ivMonkeyStart
that the error references is not null. I have tried different ways of setting ivMonkeyStart
but have not found a way that makes a difference...
public class MainActivity extends Activity {
ImageView ivMonkeyStart;
Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ivMonkeyStart = (ImageView)findViewById(R.id.ivMonkeyStart);
final Animation startMonkeyScaleIn = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.start_scale);
final Animation startMonkeyPulse = AnimationUtils.loadAnimation(this, R.anim.start_pulse);
ivMonkeyStart.startAnimation(startMonkeyScaleIn);
startMonkeyScaleIn.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
ivMonkeyStart.startAnimation(startMonkeyPulse);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
ivMonkeyStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
FlurryAgent.logEvent("Clicked Start");
Intent myIntent = new Intent(MainActivity.this, GuessActivity.class);
MainActivity.this.startActivity(myIntent);
}
});
}
Here is the logcat:
01-01 22:59:56.658 2188-2188/com.zdkapps.guesszoo E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.zdkapps.guesszoo, PID: 2188
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.zdkapps.guesszoo/com.zdkapps.guesszoo.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.startAnimation(android.view.animation.Animation)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.startAnimation(android.view.animation.Animation)' on a null object reference
at com.zdkapps.guesszoo.MainActivity.onCreate(MainActivity.java:49)
at android.app.Activity.performCreate(Activity.java:5933)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
The error references this line: ivMonkeyStart.startAnimation(startMonkeyScaleIn);
Any idea? Thanks!
Copied from a comment for the question/answer mechanism:
What are these devices? Is there any specific difference? Maybe you have two layouts, one with the ivMonkeyStart ImageView and one without, and these devices get the second layout?
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