Android Studio應用程序不工作在新的Android版本

我創建了一個應用程序，它適用於較舊的Android版本（最小API是10），但是當我安裝在其他設備（Android 4.4.2）時，該應用程序無法正常工作，我收到'App not responding'屏幕。任何幫助？Android Studio應用程序不工作在新的Android版本

的應用程序崩潰，當我在菜單中選擇一個位置，這應該打開一個新的活動...

謝謝，反正

- 編輯（錯誤MSG） -

07-20 16:55:26.766 22142-22142/? E/AndroidRuntime﹕ FATAL EXCEPTION: main 
Process: com.example.desenvolvimento.sqlteste, PID: 22142 
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.desenvolvimento.sqlteste/com.example.desenvolvimento.sqlteste.LoginActivity}; have you declared this activity in your AndroidManifest.xml? 
     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1852) 
     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1552) 
     at android.app.Activity.startActivityForResult(Activity.java:3746) 
     at android.app.Activity.startActivityForResult(Activity.java:3707) 
     at android.app.Activity.startActivity(Activity.java:4027) 
     at android.app.Activity.startActivity(Activity.java:3989) 
     at com.example.desenvolvimento.sqlteste.MainActivity$1.onItemClick(MainActivity.java:33) 
     at android.widget.AdapterView.performItemClick(AdapterView.java:300) 
     at android.widget.AbsListView.performItemClick(AbsListView.java:1143) 
     at android.widget.AbsListView$PerformClick.run(AbsListView.java:3044) 
     at android.widget.AbsListView.onTouchUp(AbsListView.java:3845) 
     at android.widget.AbsListView.onTouchEvent(AbsListView.java:3617) 
     at android.view.View.dispatchTouchEvent(View.java:8393) 
     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2426) 
     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2158) 
     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2432) 
     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2172) 
     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2432) 
     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2172) 
     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2432) 
     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2172) 
     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2432) 
     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2172) 
     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2314) 
     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1692) 
     at android.app.Activity.dispatchTouchEvent(Activity.java:2749) 
     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2275) 
     at android.view.View.dispatchPointerEvent(View.java:8583) 
     at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4091) 
     at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3957) 
     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3509) 
     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3562) 
     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3528) 
     at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3638) 
     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3536) 
     at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3695) 
     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3509) 
     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3562) 
     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3528) 
     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3536) 
     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3509) 
     at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5806) 
     at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5745) 
     at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5716) 
     at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5896) 
     at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:192) 
     at android.os.MessageQueue.nativePollOnce(Native Method) 
     at android.os.MessageQueue.next(MessageQueue.java:143) 
     at android.os.Looper.loop(Looper.java:122) 
     at android.app.ActivityThread.main(ActivityThread.java:5312) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.refl

- 新logcat

07-20 17:22:47.931 26650-26650/? E/AndroidRuntime? FATAL EXCEPTION: main 
Process: com.example.desenvolvimento.sqlteste, PID: 26650 
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.desenvolvimento.sqlteste/com.example.desenvolvimento.sqlteste.LoginActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setDisplayHomeAsUpEnabled(boolean)' on a null object reference 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2314) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388) 
     at android.app.ActivityThread.access$800(ActivityThread.java:148) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5312) 
     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:901) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696) 
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setDisplayHomeAsUpEnabled(boolean)' on a null object reference 
     at com.example.desenvolvimento.sqlteste.LoginActivity.setupActionBar(LoginActivity.java:120) 
     at com.example.desenvolvimento.sqlteste.LoginActivity.onCreate(LoginActivity.java:35) 
     at android.app.Activity.performCreate(Activity.java:5953) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1128) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2267) 
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388) 
            at android.app.ActivityThread.access$800(ActivityThread.java:148) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292) 
            at android.os.Handler.dispatchMessage(Handler.java:102) 
            at android.os.Looper.loop(Looper.java:135) 
            at android.app.ActivityThread.main(ActivityThread.java:5312) 
            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:901) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)

來源

2015-07-20 Gustavo Henrique

發佈有關您的代碼的更多細節，以及發生崩潰時的logcat輸出！ –

這就是問題所在，我無法看到logcat導致我的設備USB不工作：/ –

應用程序在什麼時候崩潰？你的應用程序試圖做什麼？給我一些工作。 –