Android模拟器中的“不幸的是（应用程序名称）已停止”

Question

I am developing an android app using eclipse. Every time I run it in the AVD I get the error "Unfortunately Has Stopped". Im trying to transition between the Startup activity and the Main Menu activity using android animation. Here is part of my java code to support the main activity:

    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.start_up);
    startAnimating();
}
private void startAnimating() {
    // TODO Auto-generated method stub
    TextView logo1 = (TextView) findViewById(R.id.title);
    Animation fade1 = AnimationUtils.loadAnimation(this, R.animator.fade_in);
    logo1.startAnimation(fade1);
    TextView logo2 = (TextView) findViewById(R.id.secondTV);
    Animation fade2 = AnimationUtils.loadAnimation(this, R.animator.fade_in2);
    logo2.startAnimation(fade2);

    fade2.setAnimationListener(new AnimationListener(){

        @Override
        public void onAnimationEnd(Animation animation) {
            // TODO Auto-generated method stub
            startActivity(new Intent(Startup.this, SymptomViewer.class));
            Startup.this.finish();

        }

        @Override
        public void onAnimationRepeat(Animation animation) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onAnimationStart(Animation animation) {
            // TODO Auto-generated method stub

        }

    });


    }
protected void onPause(){
    super.onPause();
    TextView logo1 = (TextView) findViewById(R.id.title);
    logo1.clearAnimation();
    TextView logo2 = (TextView) findViewById(R.id.secondTV);
    logo2.clearAnimation();

}
protected void onResume(){
    super.onResume();
    startAnimating();
}
}

I have been searching in forums all over the internet and I cant seem to solve the this. However I checked the logcat and I found something to do with Null pointer exception, which is involved when making references. I have run through my code a number of times and it seems fine. What maybe causing this.

Here is the LogCat

05-06 18:24:58.925: D/AndroidRuntime(1355): Shutting down VM
05-06 18:24:58.925: W/dalvikvm(1355): threadid=1: thread exiting with uncaught exception (group=0xb2a98ba8)
05-06 18:24:58.965: E/AndroidRuntime(1355): FATAL EXCEPTION: main
05-06 18:24:58.965: E/AndroidRuntime(1355): Process: com.example.ubumitrial1, PID: 1355
05-06 18:24:58.965: E/AndroidRuntime(1355): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ubumitrial1/com.example.ubumitrial1.Startup}: java.lang.NullPointerException
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.app.ActivityThread.access$800(ActivityThread.java:135)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.os.Handler.dispatchMessage(Handler.java:102)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.os.Looper.loop(Looper.java:136)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.app.ActivityThread.main(ActivityThread.java:5017)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at java.lang.reflect.Method.invokeNative(Native Method)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at java.lang.reflect.Method.invoke(Method.java:515)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at dalvik.system.NativeStart.main(Native Method)
05-06 18:24:58.965: E/AndroidRuntime(1355): Caused by: java.lang.NullPointerException
05-06 18:24:58.965: E/AndroidRuntime(1355):     at com.example.ubumitrial1.Startup.startAnimating(Startup.java:27)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at com.example.ubumitrial1.Startup.onCreate(Startup.java:17)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.app.Activity.performCreate(Activity.java:5231)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
05-06 18:24:58.965: E/AndroidRuntime(1355):     ... 11 more
05-06 18:25:02.275: I/Process(1355): Sending signal. PID: 1355 SIG: 9

Answer 1

05-06 18:24:58.965: E/AndroidRuntime(1355): Caused by: java.lang.NullPointerException
05-06 18:24:58.965: E/AndroidRuntime(1355):     at com.example.ubumitrial1.Startup.startAnimating(Startup.java:27)

These log lines show that the NPE happend at line 27. Go to that line (double-click the "at" line in Eclipse jumps to the code)

This will likely be a line like: widget.doSomething() . The NPE is thrown because widget is null (a previous initialization via findViewById may have failed, you have to fix the id in the layout [or code]).

Answer 2

FATAL EXCEPTION: main
05-06 18:24:58.965: E/AndroidRuntime(1355): Process: com.example.ubumitrial1, PID: 1355
05-06 18:24:58.965: E/AndroidRuntime(1355): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ubumitrial1/com.example.ubumitrial1.Startup}: java.lang.NullPointerException
05-06 18:24:58.965: E/AndroidRuntime(1355):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)

As per this error message, I sense that You might not have declared this activity properly in your Manifest file. Did you define it correctly ? Please double check the declaration

    Caused by: java.lang.NullPointerException
05-06 18:24:58.965: E/AndroidRuntime(1355):     at com.example.ubumitrial1.Startup.startAnimating(Startup.java:27)
05-06 18:24:58.965: E/AndroidRuntime(1355):     at com.example.ubumitrial1.Startup.onCreate(Startup.java:17)

As per this message you are referring to a component which is not initialized properly. Please check you lines 17 and 27. Both of these should help to resolve your problem.

In case if unable to solve the problem, Feel free to post code with Line numbers highlighted and also your manifest file.

Answer 3

I got solution for ubuntu 14.04 LTS Go to terminal type "android AVD" then wait till emulator start. Now go to eclipse run your android project and force project to run throw online emulator(that is still running). Hope it works for you. CHeers!