0

我使用此代码来设置视图

 setContentView(R.layout.main_activity);

然后我有这段代码可以在屏幕上显示信息

 Cursor MainPageCursor = databaseHelper.fetchAllReminders();
     startManagingCursor(MainPageCursor);


     String[] empty = new String[] { DatabaseStore.MUTE_TITLE,  DatabaseStore.START_KEY_TIME, DatabaseStore.END_KEY_TIME, DatabaseStore.COVERT_DAYS }; 



        int[] notempty = new int[]{R.id.text1,R.id.text2, R.id.text4,  R.id.text5};
        SimpleCursorAdapter mainPageList = new SimpleCursorAdapter(this, R.layout.editinfo_row,MainPageCursor, empty, notempty);
       setListAdapter(mainPageList);

但我遇到的问题是我需要在 simplecursoraapter 中的每个项目行中添加一个切换按钮，但是如果我将它放入 simplecursoradapter 布局 R.layout.editinfo_row 我得到一个空指针异常，我该如何解决？

更新 - editinfo_row.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/widget38"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginLeft="10dip"
        android:layout_marginRight="10dip"
        android:orientation="vertical" >

        <TextView
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/text1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center_vertical"
            android:textSize="25sp" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >


            <TextView
                android:id="@+id/text2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="30sp" />
    <TextView
                android:id="@+id/text3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text=" - "
                android:textSize="30sp" />
            <TextView
                android:id="@+id/text4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="30sp" />


        <ToggleButton
        android:id="@+id/toggleButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
          android:textOn="main"
        android:textOff="off"
        android:text="ToggleButton" />

</LinearLayout>



  <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >
            <TextView
                android:id="@+id/text5"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="15sp" />

        </LinearLayout>

    </LinearLayout>

日志猫：

05-30 16:31:14.249: E/AndroidRuntime(21484): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.seanoneill.android.SilentPhone/com.seanoneill.android.SilentPhone.MainActivity}: java.lang.NullPointerException
05-30 16:31:14.249: E/AndroidRuntime(21484):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at android.os.Looper.loop(Looper.java:123)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at android.app.ActivityThread.main(ActivityThread.java:3729)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at java.lang.reflect.Method.invokeNative(Native Method)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at java.lang.reflect.Method.invoke(Method.java:507)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:874)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:632)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at dalvik.system.NativeStart.main(Native Method)
05-30 16:31:14.249: E/AndroidRuntime(21484): Caused by: java.lang.NullPointerException
05-30 16:31:14.249: E/AndroidRuntime(21484):    at com.seanoneill.android.SilentPhone.MainActivity.addListenerOnButton(MainActivity.java:190)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at com.seanoneill.android.SilentPhone.MainActivity.onCreate(MainActivity.java:47)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-30 16:31:14.249: E/AndroidRuntime(21484):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
05-30 16:31:14.249: E/AndroidRuntime(21484):    ... 11 more
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1 回答 1

0

听起来你应该实现自己的适配器，覆盖SimpleCursorAdapter.getView()以获得你想要的东西。这是我发现的一个例子

于 2012-05-30T15:30:04.320 回答