Java 在Sony D2203上运行PreferenceManager.setDefaultValues时出错,但在Sony D2403上运行时,该错误仍然有效
索尼D2203运行安卓4.4.2,D2403运行安卓4.4.4 代码中给出错误的特定行是:Java 在Sony D2203上运行PreferenceManager.setDefaultValues时出错,但在Sony D2403上运行时,该错误仍然有效,java,android,android-preferences,android-4.4-kitkat,edittextpreference,Java,Android,Android Preferences,Android 4.4 Kitkat,Edittextpreference,索尼D2203运行安卓4.4.2,D2403运行安卓4.4.4 代码中给出错误的特定行是: PreferenceManager.setDefaultValues(this,R.xml.preference,false); 这是错误的logcat输出: 4-22 13:13:42.542 24913-24913/petra.com.wecapture E/AndroidRuntime? FATAL EXCEPTION: main Process: petra.com.wecapture
PreferenceManager.setDefaultValues(this,R.xml.preference,false);
这是错误的logcat输出:
4-22 13:13:42.542 24913-24913/petra.com.wecapture E/AndroidRuntime? FATAL EXCEPTION: main
Process: petra.com.wecapture, PID: 24913
java.lang.RuntimeException: Unable to start activity ComponentInfo{petra.com.wecapture/petra.com.wecapture.MainActivity}: android.view.InflateException: Binary XML file line #6: Error inflating class petra.com.settings.MyEditTextPreference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2246)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2296)
at android.app.ActivityThread.access$800(ActivityThread.java:145)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1243)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5136)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:819)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:635)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class petra.com.settings.MyEditTextPreference
at android.preference.GenericInflater.createItem(GenericInflater.java:386)
at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:430)
at android.preference.GenericInflater.rInflate(GenericInflater.java:481)
at android.preference.GenericInflater.rInflate(GenericInflater.java:493)
at android.preference.GenericInflater.inflate(GenericInflater.java:326)
at android.preference.GenericInflater.inflate(GenericInflater.java:263)
at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:272)
at android.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:485)
at android.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:444)
at petra.com.wecapture.MainActivity.onCreate(MainActivity.java:221)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2210)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2296)
at android.app.ActivityThread.access$800(ActivityThread.java:145)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1243)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5136)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:819)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:635)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet]
at java.lang.Class.getConstructorOrMethod(Class.java:472)
at java.lang.Class.getConstructor(Class.java:446)
at android.preference.GenericInflater.createItem(GenericInflater.java:377)
at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:430)
at android.preference.GenericInflater.rInflate(GenericInflater.java:481)
at android.preference.GenericInflater.rInflate(GenericInflater.java:493)
at android.preference.GenericInflater.inflate(GenericInflater.java:326)
at android.preference.GenericInflater.inflate(GenericInflater.java:263)
at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:272)
at android.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:485)
at android.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:444)
at petra.com.wecapture.MainActivity.onCreate(MainActivity.java:221)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2210)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2296)
at android.app.ActivityThread.access$800(ActivityThread.java:145)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1243)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5136)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:819)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:635)
at dalvik.system.NativeStart.main(Native Method)
device not found
首选项XML文件:
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory
android:title="App settings"
android:key="pref_key_storage_settings">
<petra.com.settings.MyEditTextPreference
android:key="pref_serverpath"
android:title="Server address"
android:defaultValue="http://192.168.0.1/"
/>
<petra.com.settings.MyEditTextPreference
android:key="pref_servicename"
android:title="Service Name"
android:defaultValue="Service1.svc"
/>
<CheckBoxPreference
android:key="pref_firstrun"
android:title="firstrun"
android:defaultValue="true"
/>
</PreferenceCategory>
<PreferenceCategory
android:title="Local Database Tools"
android:key="pref_key_db_settings">
<Preference
android:key="pref_clean_db"
android:title="Clean database"
android:summary="All data in local database will be lost."
android:enabled="true">
</Preference>
</PreferenceCategory>
</PreferenceScreen>
有人知道我为什么会遇到这个问题吗?我在网上找不到任何帮助。我的代码在安卓4.4.2和安卓4.4.4之间似乎存在一些兼容性问题,但我不知道是什么问题。在我看来,不同的API版本在从XML膨胀首选项对象时使用不同的默认构造函数。在子类化android对象时,应该始终实现所有默认构造函数。您的MyEditTextPreference应该如下所示
public class MyEditTextPreference extends EditTextPreference {
public MyEditTextPreference(Context context) {
super(context);
}
public MyEditTextPreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyEditTextPreference(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void setText(String text) {
super.setText(text);
setSummary(text);
}
}
public class MyEditTextPreference extends EditTextPreference {
public MyEditTextPreference(Context context) {
super(context);
}
public MyEditTextPreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyEditTextPreference(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void setText(String text) {
super.setText(text);
setSummary(text);
}
}