我在android中使用了以下代码，但它在android模拟器中不起作用。
给出以下错误。
--------- beginning of crash
04-17 17:53:48.076 4802-4802/com.package E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.package, PID: 4802
android.view.InflateException: Binary XML file line #30: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:633)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.preference.Preference.onCreateView(Preference.java:510)
at android.preference.Preference.getView(Preference.java:487)
at android.preference.PreferenceGroupAdapter.getView(PreferenceGroupAdapter.java:246)
at android.widget.AbsListView.obtainView(AbsListView.java:2347)
at android.widget.ListView.makeAndAddView(ListView.java:1864)
at android.widget.ListView.fillDown(ListView.java:698)
at android.widget.ListView.fillFromTop(ListView.java:759)
at android.widget.ListView.layoutChildren(ListView.java:1673)
at android.widget.AbsListView.onLayout(AbsListView.java:2151)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2086)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843)
at android.view.ViewRootImpl
04-17 17:53:48.077 1965-2042/system_process W/ActivityManager: Force finishing activity 1 com.package/.MyTabActivity
以下是我使用的代码。
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceCategory;
import android.preference.PreferenceFragment;
import android.util.Log;
import com.google.android.gms.analytics.GoogleAnalytics;
import org.jraf.android.backport.switchwidget.SwitchPreference;
public class SettingsActivity extends PreferenceActivity {
private static final String TAG = "SettingsActivity";
SharedPreferences mPrefs;
SharedPreferences.Editor editor;
PreferenceCategory prefCategoryGenerals;
ListPreference pitchLevel, recordingType, visualizerType;
SwitchPreference showQuestionTextSwitch, visualizerSwitch;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//addPreferencesFromResource(R.xml.settings);
//getSherlock().getActionBar().setDisplayHomeAsUpEnabled(true);
getFragmentManager().beginTransaction().replace(android.R.id.content, new MyPreferenceFragment()).commit();
//mPrefs = getSharedPreferences(Util.PREFS_SETTINGS, MODE_PRIVATE);
//editor = mPrefs.edit();
}
public static class MyPreferenceFragment extends PreferenceFragment
{
@Override
public void onCreate(final Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.settings);
}
}
@Override
protected void onResume() {
//init();
super.onResume();
}
@Override
protected void onStart() {
//EasyTracker.getInstance().activityStart(this); // Add this method.
GoogleAnalytics.getInstance(this).reportActivityStart(this);
super.onStart();
}
@Override
public void onStop() {
super.onStop();
// The rest of your onStop() code.
//EasyTracker.getInstance().activityStop(this); // Add this method.
GoogleAnalytics.getInstance(this).reportActivityStop(this);
}
Preference.OnPreferenceChangeListener changeListener = new Preference.OnPreferenceChangeListener() {
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (newValue instanceof String) {
editor.putString(preference.getKey(), (String)newValue);
editor.commit();
} else if (newValue instanceof Boolean) {
editor.putBoolean(preference.getKey(), (Boolean)newValue);
editor.commit();
}
Log.e(preference.getKey(),newValue.toString());
updatePreferences();
return true;
}
};
private void init() {
prefCategoryGenerals = (PreferenceCategory)findPreference(getString(R.string.settings_general));
pitchLevel = (ListPreference)findPreference(getString(R.string.pitch_duration));
pitchLevel.setOnPreferenceChangeListener(changeListener);
recordingType = (ListPreference)findPreference(getString(R.string.recording_type));
recordingType.setOnPreferenceChangeListener(changeListener);
visualizerSwitch = (SwitchPreference)findPreference(getString(R.string.visualizer));
visualizerSwitch.setOnPreferenceChangeListener(changeListener);
showQuestionTextSwitch = (SwitchPreference)findPreference(getString(R.string.question_text));
showQuestionTextSwitch.setOnPreferenceChangeListener(changeListener);
visualizerType = (ListPreference)findPreference(getString(R.string.visualizer_type));
visualizerType.setOnPreferenceChangeListener(changeListener);
updatePreferences();
}
private void updatePreferences() {
boolean recordingTypeVideo = mPrefs.getString(Util.PREFS_RECORDING_TYPE, Util.PREFS_RECORDING_A).equals(Util.PREFS_RECORDING_V);
boolean visualizerEnabled = mPrefs.getBoolean(Util.PREFS_SHOW_VISUALIZER, false);
boolean visualizerTypeEnabled = !recordingTypeVideo && visualizerEnabled;
visualizerType.setEnabled(visualizerTypeEnabled);
visualizerSwitch.setEnabled(!recordingTypeVideo);
}
}
以下是Settings.xml文件的代码。
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:switchpref="http://schemas.android.com/apk/res-auto"
android:persistent="true" >
<PreferenceCategory
android:key="@string/settings_general"
android:title="@string/settings_general" >
<ListPreference
android:key="@string/pitch_duration"
android:title="@string/pitch_duration"
android:defaultValue="@string/pitch_standard"
android:entries="@array/pitch"
android:entryValues="@array/pitch"
android:summary="@string/summary_pitch_duration"
/>
<ListPreference
android:key="@string/recording_type"
android:title="@string/recording_type"
android:defaultValue="@string/audio_recording"
android:entries="@array/recording_type"
android:entryValues="@array/recording_type"
android:summary="@string/summary_recording_type"
/>
<org.jraf.android.backport.switchwidget.SwitchPreference
android:key="@string/question_text"
android:title="@string/question_text"
switchpref:asb_summaryOff="@string/switch_prefs_question_text"
switchpref:asb_summaryOn="@string/switch_prefs_question_text"
switchpref:asb_switchTextOff="@string/off"
switchpref:asb_switchTextOn="@string/on"/>
<org.jraf.android.backport.switchwidget.SwitchPreference
android:key="@string/visualizer"
android:title="@string/visualizer"
android:defaultValue="false"
switchpref:asb_summaryOff="@string/switch_prefs_visualizer"
switchpref:asb_summaryOn="@string/switch_prefs_visualizer"
switchpref:asb_switchTextOff="@string/off"
switchpref:asb_switchTextOn="@string/on" />
<ListPreference
android:key="@string/visualizer_type"
android:title="@string/visualizer_type"
android:defaultValue="@string/visualizer_line"
android:entries="@array/visualizer_type"
android:entryValues="@array/visualizer_type"
android:summary="@string/summary_visualizer_type"
/>
<com.iq.android.preferences.AboutDialogPref
android:dialogLayout="@layout/dialog_about_layout"
android:key="funThing"
android:negativeButtonText="Cancel"
android:positiveButtonText="OK"
android:title="About" />
</PreferenceCategory>
</PreferenceScreen>
以上整个代码在android 4.4.4仿真器和设备中也能正常工作。
答案 0 :(得分：0)
最后我想出了我们的问题。
以下库中存在问题。这不适用于PreferenceFragment。
org.jraf:android-switch-backport:2.0.1
所以我实施了SwitchPreference而不是这个。