在按钮上开始片段单击对话中的片段

Question

我有一个偏好性，我试图从中创建一个对dialogPreference，然后单击首选项。我首先试图将我的对话互惠类（myPreferenceFragment）放在偏好性类别外，并且布局为

  <com.example.second.MyPreferencefragment
    android:dialogMessage="Demo"
    android:key="resetDialog"
    android:negativeButtonText="No"
    android:persistent="false"
    android:positiveButtonText="Yes"
    android:summary="Place the time here"
    android:title="Demo App"  />

这很好，但是我的DialogPreference有一个按钮，单击我需要打开一个片段。如何实现？我在DialogPreference中没有FragmentManager。

我尝试在我的偏好性中创建DialogPreference作为内部类，但对话框偏好的布局如下。

 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

     <DialogPreference class = "com.example.second.PrefsActivity$MyPreferencefragment"
    android:dialogMessage="Demo"
    android:key="resetDialog"
    android:negativeButtonText="No"
    android:persistent="false"
    android:positiveButtonText="Yes"
    android:summary="Place the time here"
    android:title="Demo App"  />

这引发了异常

    Caused by: java.lang.InstantiationException: can't instantiate class android.preference.DialogPreference
  01-15 05:54:01.427: E/AndroidRuntime(12843):  at java.lang.reflect.Constructor.constructNative(Native Method)

这是毫无用处的，因为DialogPreference是一个抽象类。

我只需要从DialogPreference的单击按钮开始片段即可。如何实现？任何建议都会有所帮助。预先感谢。

编辑::添加整个堆栈

01-15 05:27:41.325: E/AndroidRuntime(8932): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.second/com.example.second.PrefsActivity}: android.view.InflateException: Binary XML file line #5: Error inflating class java.lang.reflect.Constructor
01-15 05:27:41.325: E/AndroidRuntime(8932):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2253)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2311)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.app.ActivityThread.access$700(ActivityThread.java:152)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1438)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.os.Handler.dispatchMessage(Handler.java:102)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.os.Looper.loop(Looper.java:158)
  01-15 05:27:41.325: E/AndroidRuntime(8932):   at android.app.ActivityThread.main(ActivityThread.java:5236)
  01-15 05:27:41.325: E/AndroidRuntime(8932):   at java.lang.reflect.Method.invokeNative(Native Method)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at java.lang.reflect.Method.invoke(Method.java:515)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1257)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1073)
01-15 05:27:41.325: E/AndroidRuntime(8932):     at dalvik.system.NativeStart.main(Native Method)
 01-15 05:27:41.325: E/AndroidRuntime(8932): Caused by: android.view.InflateException: Binary XML file line #5: Error inflating class java.lang.reflect.Constructor
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.preference.GenericInflater.createItem(GenericInflater.java:397)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.preference.GenericInflater.onCreateItem(GenericInflater.java:417)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:428)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.preference.GenericInflater.rInflate(GenericInflater.java:481)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.preference.GenericInflater.inflate(GenericInflater.java:326)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.preference.GenericInflater.inflate(GenericInflater.java:263)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:272)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.preference.PreferenceActivity.addPreferencesFromResource(PreferenceActivity.java:1778)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at com.example.tapholdcustom.PrefsActivity.onCreate(PrefsActivity.java:38)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.app.Activity.performCreate(Activity.java:5389)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2217)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    ... 11 more
  01-15 05:27:41.325: E/AndroidRuntime(8932): Caused by: java.lang.InstantiationException: can't instantiate class android.preference.DialogPreference
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at java.lang.reflect.Constructor.constructNative(Native Method)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
 01-15 05:27:41.325: E/AndroidRuntime(8932):    at android.preference.GenericInflater.createItem(GenericInflater.java:383)
01-15 05:27:41.325: E/AndroidRuntime(8932):     ... 22 more

我的主要关注点是：

1. 单击偏好的单击

的打开自定义对话preferference

2. 单击"自定义对话"中的按钮（自定义DialogPreference中有三个按钮）

我可以通过不使用DialogPreference作为内部类来实现1，因为它给了我上述的stacktrace。但是我如何达到第二点？

Answer 1

您需要拥有一个容器（通常是帧布局），然后将片段交换为片段交易的容器。仅此例外不是很描述性，我不确定您在获得它之前做了什么 - 您至少需要在XML上使用片段，否则请确保您有一个空的构造函数试图以这种方式称呼它（用代码）。

发布您的其余堆栈跟踪，应该是通过引起的。

getSupportFragmentManager().beginTransaction().replace(R.id.your_container_id, new YourFragment()).commit();