無法將視圖設置爲對話框

請看下面的代碼無法將視圖設置爲對話框

用於創建自定義對話框的代碼。這個班級是AlertDialog的動作班。當用戶點擊那個AlertDialog上的「是」按鈕時，該類被激發。私有類PositiveDialogBtnAction實現DialogInterface.OnClickListener {

 @Override 
     public void onClick(DialogInterface arg0, int arg1) { 
      // TODO Auto-generated method stub 
      //Toast.makeText(getApplicationContext(), databaseConnector.getStreetAddress(selectedBranch), Toast.LENGTH_LONG).show(); 

      Dialog dialog = new Dialog(getApplicationContext()); 
      dialog.setContentView(R.layout.activity_call_dialog); 
      dialog.setTitle("Select a Phone Number"); 

      dialog.show(); 
     } 

    }

activity_call_dialog.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context=".CallDialog" > 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerHorizontal="true" 
     android:layout_centerVertical="true" 
     android:text="@string/hello_world" /> 

</RelativeLayout>

CallDialog.java

import android.os.Bundle; 
import android.app.Activity; 
import android.view.Menu; 

public class CallDialog extends Activity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_call_dialog); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.activity_call_dialog, menu); 
     return true; 
    } 

}

當我試圖運行自定義迪阿羅g，出現以下錯誤

02-15 11:04:02.170: E/AndroidRuntime(585): FATAL EXCEPTION: main 
02-15 11:04:02.170: E/AndroidRuntime(585): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 
02-15 11:04:02.170: E/AndroidRuntime(585): at android.view.ViewRoot.setView(ViewRoot.java:531) 
02-15 11:04:02.170: E/AndroidRuntime(585): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177) 
02-15 11:04:02.170: E/AndroidRuntime(585): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 
02-15 11:04:02.170: E/AndroidRuntime(585): at android.app.Dialog.show(Dialog.java:241) 
02-15 11:04:02.170: E/AndroidRuntime(585): at com.example.esoftcallmanager.Form$PositiveDialogBtnAction.onClick(Form.java:155) 
02-15 11:04:02.170: E/AndroidRuntime(585): at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:159) 
02-15 11:04:02.170: E/AndroidRuntime(585): at android.os.Handler.dispatchMessage(Handler.java:99) 
02-15 11:04:02.170: E/AndroidRuntime(585): at android.os.Looper.loop(Looper.java:123) 
02-15 11:04:02.170: E/AndroidRuntime(585): at android.app.ActivityThread.main(ActivityThread.java:3683) 
02-15 11:04:02.170: E/AndroidRuntime(585): at java.lang.reflect.Method.invokeNative(Native Method) 
02-15 11:04:02.170: E/AndroidRuntime(585): at java.lang.reflect.Method.invoke(Method.java:507) 
02-15 11:04:02.170: E/AndroidRuntime(585): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
02-15 11:04:02.170: E/AndroidRuntime(585): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
02-15 11:04:02.170: E/AndroidRuntime(585): at dalvik.system.NativeStart.main(Native Method) 
02-15 11:04:05.520: I/Process(585): Sending signal. PID: 585 SIG: 9

這是爲什麼？請幫忙！

來源

2013-02-15 Yohan Weerasinghe

使用

Dialog dialog = new Dialog(CallDialog.this);

，而不是

Dialog dialog = new Dialog(getApplicationContext());

，因爲顯示對話框，你將需要傳遞活動上下文，而不是應用

來源

2013-02-15 05:47:53

您好，我做到了，但現在它說「沒有封閉的類型CallDialog可以在範圍內訪問「!! – 2013-02-15 05:51:50

@Yohan：如果你是在單獨的類中創建對話框，那麼你將需要使用類構造函數來傳遞活動上下文 – 2013-02-15 05:57:02

我不明白 – 2013-02-15 06:07:48

無法將視圖設置爲對話框

回答

相關問題