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我在對話框上的按鈕的事件偵聽器有問題。 我有一個quickAction，當我點擊菜單快速動作項目時，我想顯示一個對話框， ，我想爲buton YES和NO設置clickListener。請幫幫我！ 我的代碼： 函數的onCreate（），我宣佈無法設置對話框上的按鈕監聽器？
dialog1 = new Dialog(this,R.style.FullHeightDialog);
btnDialogYes = (Button)dialog1.findViewById(R.id.bmessageDialogYes);
btnDialogNo = (Button)dialog1.findViewById(R.id.bmessageDialogNo);
message = (TextView)dialog1.findViewById(R.id.tvmessagedialogtext);
dialog1.setContentView(R.layout.custom_dialog);
dialog1.setCancelable(true);
和
class MyClass implements OnClickListener{
}
和我重寫
onClick(){
switch(v.getId()){
case R.id.bmessageDialogYes:{
board.setCurrentPiece(Board.WHITE);
threadComputer = new myThread(doBackgroundThreadProcessing);
threadComputer.start();
dialog1.dismiss();
break;
}
case R.id.bmessageDialogNo:{
board.setCurrentPiece(Board.BLACK);
threadComputer = new myThread(doBackgroundThreadProcessing);
threadComputer.start();
dialog1.dismiss();
break;
}
}
}
當我點擊菜單quickaction的項目，我打電話提播放（）
Play(){
message.setText("YES to AI first play!");
btnDialogYes.setOnClickListener(this); // error here
btnDialogNo.setOnClickListener(this);
dialog1.show();
}
但是當我運行的應用程序無法正常工作，和我有檢查控件的ID文件佈局:(
my layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout_root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:orientation="horizontal" >
<!-- This is for the info image -->
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:src="@android:drawable/ic_menu_info_details" />
<!-- Title -->
<TextView
android:id="@+id/tvmessagedialogtitle"
android:layout_width="184dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="4dip"
android:layout_weight="0.01"
android:padding="8dp"
android:text="Message"
android:textColor="#343434"
android:textSize="16dip"
android:textStyle="normal"
android:typeface="normal" />
</LinearLayout>
<!-- Underline with this bluish color -->
<View
android:layout_width="fill_parent"
android:layout_height="2dip"
android:background="#09adb9" />
<!-- The message -->
<TextView
android:id="@+id/tvmessagedialogtext"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:layout_marginBottom="10dp"
android:layout_marginTop="4dip"
android:gravity="left"
android:padding="8dp"
android:text="Message"
android:textColor="#343434"
android:textSize="15dip"
android:textStyle="normal"
android:typeface="normal" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:orientation="horizontal" >
<!-- Yes button -->
<Button
android:id="@+id/bmessageDialogYes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dip"
android:layout_marginLeft="60dp"
android:background="#ffffff"
android:padding="8dp"
android:text="Yes"
android:textColor="#343434"
android:textSize="13dip"
android:textStyle="normal"
android:typeface="normal" />
<!-- No Button -->
<Button
android:id="@+id/bmessageDialogNo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dip"
android:layout_marginLeft="80dp"
android:background="#ffffff"
android:padding="8dp"
android:text="No"
android:textColor="#343434"
android:textSize="13dip"
android:textStyle="normal"
android:typeface="normal" />
</LinearLayout>
</LinearLayout>
logcat
02-17 19:34:38.760: E/AndroidRuntime(374): FATAL EXCEPTION: main
02-17 19:34:38.760: E/AndroidRuntime(374): java.lang.NullPointerException
02-17 19:34:38.760: E/AndroidRuntime(374): at my.quoc.caro_final.ComputerActivity.Play(ComputerActivity.java:254)
02-17 19:34:38.760: E/AndroidRuntime(374): at my.quoc.caro_final.ComputerActivity.access$4(ComputerActivity.java:219)
02-17 19:34:38.760: E/AndroidRuntime(374): at my.quoc.caro_final.ComputerActivity$2.onItemClick(ComputerActivity.java:68)
02-17 19:34:38.760: E/AndroidRuntime(374): at my.quoc.caro_final.QuickAction$2.onClick(QuickAction.java:169)
02-17 19:34:38.760: E/AndroidRuntime(374): at android.view.View.performClick(View.java:2485)
02-17 19:34:38.760: E/AndroidRuntime(374): at android.view.View$PerformClick.run(View.java:9080)
02-17 19:34:38.760: E/AndroidRuntime(374): at android.os.Handler.handleCallback(Handler.java:587)
02-17 19:34:38.760: E/AndroidRuntime(374): at android.os.Handler.dispatchMessage(Handler.java:92)
02-17 19:34:38.760: E/AndroidRuntime(374): at android.os.Looper.loop(Looper.java:123)
02-17 19:34:38.760: E/AndroidRuntime(374): at android.app.ActivityThread.main(ActivityThread.java:3683)
02-17 19:34:38.760: E/AndroidRuntime(374): at java.lang.reflect.Method.invokeNative(Native Method)
02-17 19:34:38.760: E/AndroidRuntime(374): at java.lang.reflect.Method.invoke(Method.java:507)
02-17 19:34:38.760: E/AndroidRuntime(374): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-17 19:34:38.760: E/AndroidRuntime(374): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-17 19:34:38.760: E/AndroidRuntime(374): at dalvik.system.NativeStart.main(Native Method)
02-17 19:34:40.700: I/Process(374): Sending signal. PID: 374 SIG: 9
它工作的很好！非常感謝你，我明白我的問題！再次感謝你！ – 2013-02-17 13:21:07