RingtonePreference defaultValue InflateException

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【中文标题】RingtonePreference defaultValue InflateException【英文标题】: 【发布时间】:2012-06-10 22:42:38 【问题描述】:

我使用 RingtonePreference 并希望使用默认通知声音作为默认偏好值。为了实现这一点,我遵循了以下建议:RingtonePreference Default value

可悲的是,实际上我得到了一个我无法以任何方式摆脱的InflateException。是安卓、我的手机有问题还是我做错了什么?

MyPreferenceActivity 类中我的OnCreate 方法:

public void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    addPreferencesFromResource(R.xml.preferences);

preferences.xml的相关片段:

<RingtonePreference
      android:key="ringtone_preference"
      android:ringtoneType="notification"
      android:showDefault="true"
      android:showSilent="true"
      android:defaultValue="content://settings/system/notification_sound"
      android:title="Notification sound"
      android:summary=""
      />

异常的LogCat:

06-06 22:44:07.697: E/ActivityThread(21031): Failed to inflate
06-06 22:44:07.697: E/ActivityThread(21031): android.view.InflateException: Binary XML file line #17: Error inflating class java.lang.reflect.Constructor
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.GenericInflater.createItem(GenericInflater.java:397)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.GenericInflater.onCreateItem(GenericInflater.java:417)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:428)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.GenericInflater.rInflate(GenericInflater.java:481)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.GenericInflater.rInflate(GenericInflater.java:493)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.GenericInflater.inflate(GenericInflater.java:326)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.GenericInflater.inflate(GenericInflater.java:263)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:269)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.PreferenceActivity.addPreferencesFromResource(PreferenceActivity.java:1457)
06-06 22:44:07.697: E/ActivityThread(21031):    at com.stanwise.timespacereminder.TSRPreferenceActivity.onCreate(TSRPreferenceActivity.java:44)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.app.Activity.performCreate(Activity.java:4465)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2034)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2105)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.app.ActivityThread.access$600(ActivityThread.java:133)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.os.Looper.loop(Looper.java:137)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.app.ActivityThread.main(ActivityThread.java:4586)
06-06 22:44:07.697: E/ActivityThread(21031):    at java.lang.reflect.Method.invokeNative(Native Method)
06-06 22:44:07.697: E/ActivityThread(21031):    at java.lang.reflect.Method.invoke(Method.java:511)
06-06 22:44:07.697: E/ActivityThread(21031):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
06-06 22:44:07.697: E/ActivityThread(21031):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
06-06 22:44:07.697: E/ActivityThread(21031):    at dalvik.system.NativeStart.main(Native Method)
06-06 22:44:07.697: E/ActivityThread(21031): Caused by: java.lang.reflect.InvocationTargetException
06-06 22:44:07.697: E/ActivityThread(21031):    at java.lang.reflect.Constructor.constructNative(Native Method)
06-06 22:44:07.697: E/ActivityThread(21031):    at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.GenericInflater.createItem(GenericInflater.java:383)
06-06 22:44:07.697: E/ActivityThread(21031):    ... 23 more
06-06 22:44:07.697: E/ActivityThread(21031): Caused by: java.lang.NullPointerException
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.MultiSelectListPreference.onGetDefaultValue(MultiSelectListPreference.java:211)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.Preference.<init>(Preference.java:260)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.DialogPreference.<init>(DialogPreference.java:69)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.DialogPreference.<init>(DialogPreference.java:90)
06-06 22:44:07.697: E/ActivityThread(21031):    at android.preference.MultiSelectListPreference.<init>(MultiSelectListPreference.java:49)
06-06 22:44:07.697: E/ActivityThread(21031):    ... 26 more

我还尝试插入字符串DEFAULT_NOTIFICATION_URI 而不是content://settings/system/notification_sound,但没有任何成功。完全删除 android:defaultValue 字段后,一切正常,除了我偏好的默认值是静音铃声而不是默认通知声音,这对我来说是不可接受的。

我到处搜索,找不到解决这个问题的方法。如果没有其他方法,我将使用此处发布的 hack:https://***.com/a/4298638/1265432,但我想妥善解决这个问题。

编辑:问题存在于我的 CM9 Motorola Defy 和 4.0.4 (API 15) 和 2.1 (API 7) 的模拟器中,所以我认为手机不是问题。 Bug,还是我做错了什么?

【问题讨论】:

如果你记录Settings.System.DEFAULT_NOTIFICATION_URI常量的值,那么它和你预期的一样吗?如果是,那么它看起来像一个 Android 错误。如果不是,那么它只是将其值从设备/API 更改为设备/API,然后唯一的方法就是以编程方式设置它。 是的,Settings.System.DEFAULT_NOTIFICATION_URI == "content://settings/system/notification_sound" 【参考方案1】:

我在这里提交了 Android 的错误报告:http://code.google.com/p/android/issues/detail?id=33220

与此同时,我使用以下解决方法,我发现它比问题中链接的方法更简洁。我将MyPreferenceActivityOnCreate方法修改为:

public void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);

     Uri notificationSound = Uri.parse(PreferenceManager.getDefaultSharedPreferences(this)
    .getString("ringtone_preference", System.DEFAULT_NOTIFICATION_URI.toString()));
    if (notificationSound.equals(System.DEFAULT_NOTIFICATION_URI)) 
        PreferenceManager.getDefaultSharedPreferences(this).edit()
            .putString("ringtone_preference", System.DEFAULT_NOTIFICATION_URI.toString())
            .commit();
    

    addPreferencesFromResource(R.xml.preferences);

【讨论】:

【参考方案2】:

我对您的错误报告发表了评论,对问题的真正含义有所了解。

无论如何,这里有一个对我有用的更简单的解决方法:

为您的偏好 XML 中 RingtonePreference 之后的 MultiSelectListPreference 添加一个 defaultValue:

<MultiSelectListPreference
        ...
        android:defaultValue="@array/empty"
        ...
        />

在你的 strings.xml 中:

<string-array name="empty"/>

【讨论】:

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