Android開發

Question

應用程序意外停止

當按下指定頁面上的按鈕時出現此錯誤。

此代碼將使應用程序掛起： --Code片斷

<Button android:text="Button" 
    android:onClick="SaveRegistration" 
    android:id="@+id/btnAddRegistration" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"> 
    </Button>  

public void SaveRegistration(View view) { 
     Toast.makeText(getApplicationContext(), "OK", Toast.LENGTH_LONG).show(); 
    } 

我運行2.2版

logcat的錯誤日誌

06-26 14:25:52.613: ERROR/AndroidRuntime(447): FATAL EXCEPTION: main 
06-26 14:25:52.613: ERROR/AndroidRuntime(447): java.lang.IllegalStateException: Could not find a method add(View) in the activity class com.millerbean.gasApp.MillerbeansGasInfoActivity for onClick handler on view class android.widget.Button with id 'btnTest' 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at android.view.View$1.onClick(View.java:2131) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at android.view.View.performClick(View.java:2485) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at android.view.View$PerformClick.run(View.java:9080) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at android.os.Handler.handleCallback(Handler.java:587) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at android.os.Handler.dispatchMessage(Handler.java:92) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at android.os.Looper.loop(Looper.java:123) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at android.app.ActivityThread.main(ActivityThread.java:3683) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at java.lang.reflect.Method.invoke(Method.java:507) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at dalvik.system.NativeStart.main(Native Method) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447): Caused by: java.lang.NoSuchMethodException: add 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at java.lang.ClassCache.findMethodByName(ClassCache.java:247) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at java.lang.Class.getMethod(Class.java:962) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  at android.view.View$1.onClick(View.java:2124) 
06-26 14:25:52.613: ERROR/AndroidRuntime(447):  ... 11 more 
06-26 14:25:52.643: WARN/ActivityManager(75): Force finishing activity com.millerbean.gasApp/.MillerbeansGasInfoActivity 
06-26 14:25:53.193: WARN/ActivityManager(75): Activity pause timeout for HistoryRecord{4050f5b0 com.millerbean.gasApp/.MillerbeansGasInfoActivity} 

問題解決了！

在我的主要java文件中，我有以下關於我的第一個按鈕： setContentView（R.layout.newregistration）; 它將佈局更改爲另一個xml文件newregistration.xml

後來我創建了一個Addregistration.java文件，我放置了事件處理程序。 事件處理程序需要放在我的主要java文件中，現在它可以工作。

有什麼區別： 1. setContentView（R.layout.newregistration）; （新的Intent（this，MenuBuilder.class））;

它是正確的，1設置的用戶看到2一套類來獲取事件處理器佈局等

Answer 1

怎麼樣，如果你從佈局中刪除

android:onClick="SaveRegistration" 

，做在你的代碼，例如

Button myButton = this.findViewById(btnAddRegistration); 
myButton.setOnClickListener(new OnClickListener() 
     { 
      public void onClick(View v) 
      { 
       SaveRegistration(v); 
      } 
     } 
    ); 

Answer 2

貴類擴展Activity像下面？

從Android的網站：

public class HelloAndroid extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     TextView tv = new TextView(this); 
     tv.setText("Hello, Android"); 
     setContentView(tv); 
    } 
} 

編輯：是否註釋掉吐司導致錯誤走開？如果是這樣，這可能是問題。通過Android tutorials工作。