我正在使用偏好片段，我的XML上有一个例外。它曾经工作，但我已经调整了一些东西，现在当我按下菜单右上方的3个点时它会一直崩溃。
实际错误是：
java.lang.RuntimeException：无法启动活动ComponentInfo {org.sherman.android.babynme / org.sherman.android.babynme.Activites.SettingsActivity}：android.view.InflateException：二进制XML文件行＃0：二进制XML文件行＃0：错误膨胀类片段
这是我的activity_settings.xml：
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android='http://schemas.android.com/apk/res/android'
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/activity_settings"
android:name="org.sherman.android.babynme.Fragments.SettingsFragment" />
my preferencesXML：
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<EditTextPreference
android:defaultValue="Name"
android:key="baby_name"
android:title="Baby's Name" />
<EditTextPreference
android:defaultValue="01/01/01"
android:key="baby_dob"
android:title="Baby's Birthday" />
<EditTextPreference
android:numeric="integer"
android:defaultValue="21"
android:key="mum_age"
android:singleLine="true"
android:title="Your age" />
</PreferenceScreen>
我的设置活动.kt：
class SettingsActivity : AppCompatActivity(){
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_settings)
val sharedPreferences: SharedPreferences = PreferenceManager.getDefaultSharedPreferences(this)
val babyName:String = sharedPreferences.getString("baby_name", "Baby")
title = babyName+" 'n Me"
val actionBar = this.supportActionBar
if(actionBar != null){
actionBar.setDisplayHomeAsUpEnabled(true)
}
}
override fun onOptionsItemSelected(item: MenuItem?): Boolean {
val id = item?.itemId
if(id == android.R.id.home){
NavUtils.navigateUpFromSameTask(this)
}
return super.onOptionsItemSelected(item)
}
}
以及SettingsFragment的代码：
class SettingsFragment: PreferenceFragmentCompat(), SharedPreferences.OnSharedPreferenceChangeListener {
val mContext = context
override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
addPreferencesFromResource(R.xml.pref_baby)
val sharedPreferences: SharedPreferences = android.preference.PreferenceManager.getDefaultSharedPreferences(activity.applicationContext)
onSharedPreferenceChanged(sharedPreferences, "baby_name")
onSharedPreferenceChanged(sharedPreferences, "baby_dob")
onSharedPreferenceChanged(sharedPreferences, "mum_age")
}
override fun onResume() {
super.onResume()
preferenceScreen.sharedPreferences.registerOnSharedPreferenceChangeListener(this)
//activity.getSharedPreferences(context.packageName, Context.MODE_PRIVATE).registerOnSharedPreferenceChangeListener(this)
}
override fun onPause() {
super.onPause()
preferenceScreen.sharedPreferences.unregisterOnSharedPreferenceChangeListener(this)
//activity.getSharedPreferences(context.packageName,Context.MODE_PRIVATE).unregisterOnSharedPreferenceChangeListener(this)
}
override fun onSharedPreferenceChanged(p0: SharedPreferences?, key: String?) {
Log.d(DEBUG, "Ospc called")
val pref: Preference = findPreference(key)
val etp: EditTextPreference = pref as EditTextPreference
pref.setSummary(etp.text)
}
以下是完整的错误日志：
--------- beginning of crash
02-12 19:44:06.931 4518-4518/org.sherman.android.babynme E/AndroidRuntime: FATAL EXCEPTION: main
Process: org.sherman.android.babynme, PID: 4518
java.lang.RuntimeException: Unable to start activity ComponentInfo{org.sherman.android.babynme/org.sherman.android.babynme.Activites.SettingsActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class fragment
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class fragment
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
at android.app.SharedPreferencesImpl.getString(SharedPreferencesImpl.java:255)
at android.support.v7.preference.Preference.getPersistedString(Preference.java:1601)
at android.support.v7.preference.EditTextPreference.onSetInitialValue(EditTextPreference.java:92)
at android.support.v7.preference.Preference.dispatchSetInitialValue(Preference.java:1517)
at android.support.v7.preference.Preference.onAttachedToHierarchy(Preference.java:1245)
at android.support.v7.preference.Preference.onAttachedToHierarchy(Preference.java:1257)
at android.support.v7.preference.PreferenceGroup.addPreference(PreferenceGroup.java:194)
at android.support.v7.preference.PreferenceGroup.addItemFromInflater(PreferenceGroup.java:126)
at android.support.v7.preference.PreferenceInflater.rInflate(PreferenceInflater.java:355)
at android.support.v7.preference.PreferenceInflater.inflate(PreferenceInflater.java:162)
at android.support.v7.preference.PreferenceInflater.inflate(PreferenceInflater.java:112)
at android.support.v7.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:138)
at android.support.v7.preference.PreferenceFragmentCompat.addPreferencesFromResource(PreferenceFragmentCompat.java:432)
at org.sherman.android.babynme.Fragments.SettingsFragment.onCreatePreferences(SettingsFragment.kt:20)
at android.support.v7.preference.PreferenceFragmentCompat.onCreate(PreferenceFragmentCompat.java:224)
at android.support.v4.app.Fragment.performCreate(Fragment.java:2339)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1377)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1640)
at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1896)
at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:3673)
at android.support.v4.app.FragmentController.onCreateView(FragmentController.java:111)
at android.support.v4.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:338)
at android.support.v4.app.BaseFragmentActivityApi14.onCreateView(BaseFragmentActivityApi14.java:39)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:67)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
02-12 19:44:06.933 4518-4518/org.sherman.android.babynme E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at org.sherman.android.babynme.Activites.SettingsActivity.onCreate(SettingsActivity.kt:15)
at android.app.Activity.performCreate(Activity.java:6975)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
我的问题是我改变了什么导致菜单选择现在崩溃？ （谢谢你）。
答案 0 :(得分：2)
问题是Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
您必须在某处更改过数据类型。