EditText做点击事件，结果出错

        city.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
Intent intent=new Intent();
intent.setClass(IndexActivity.this,AllCityActivity.class);
startActivity(intent);
}
});跳转之后就报错
10-28 21:34:38.863: W/dalvikvm(1175): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
10-28 21:34:38.903: E/AndroidRuntime(1175): FATAL EXCEPTION: main
10-28 21:34:38.903: E/AndroidRuntime(1175): java.lang.RuntimeException: Unable to stop activity {com.hotel525.activity/com.hotel525.activity.IndexActivity}: java.lang.NullPointerException
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:3413)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.app.ActivityThread.handleStopActivity(ActivityThread.java:3458)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.app.ActivityThread.access$2600(ActivityThread.java:125)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2050)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.os.Looper.loop(Looper.java:123)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.app.ActivityThread.main(ActivityThread.java:4627)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at java.lang.reflect.Method.invokeNative(Native Method)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at java.lang.reflect.Method.invoke(Method.java:521)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at dalvik.system.NativeStart.main(Native Method)
10-28 21:34:38.903: E/AndroidRuntime(1175): Caused by: java.lang.NullPointerException
10-28 21:34:38.903: E/AndroidRuntime(1175):  at com.hotel525.activity.IndexActivity.onStop(IndexActivity.java:331)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.app.Instrumentation.callActivityOnStop(Instrumentation.java:1169)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.app.Activity.performStop(Activity.java:3857)
10-28 21:34:38.903: E/AndroidRuntime(1175):  at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:3410)
10-28 21:34:38.903: E/AndroidRuntime(1175):  ... 11 more
帮我看一下是什么情况，如果这样不行，那我想点这个EditText就跳到AllCityActivity要怎么做。