java如何链接首选项。xml到我的表格布局中的settingsTabFragment？

Question

我需要添加设置到我的最后一个选项卡，并有数据可编辑，但我有困难这样做，不知道该使用哪些方法

我遵循的教程：https://github.com/codepath/安卓_guides/wiki/Settings-with-PreferenceFragment

设置StabFragment。爪哇

package com.example.sachin.pedometer;

import 安卓.content.Context;
import 安卓.net.Uri;
import 安卓.os.Bundle;
import 安卓.preference.ListPreference;
import 安卓.preference.Preference;
import 安卓.support.annotation.Nullable;
import 安卓.support.v4.app.Fragment;
import 安卓.view.LayoutInflater;
import 安卓.view.View;
import 安卓.view.ViewGroup;

import com.takisoft.fix.support.v7.preference.PreferenceFragmentCompat;


/**
 * A simple {@link Fragment} subclass.
 * Activities that contain this fragment must implement the
 * {@link SettingsTabFragment.OnFragmentInteractionListener} interface
 * to handle interaction events.
 * Use the {@link SettingsTabFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class SettingsTabFragment extends PreferenceFragmentCompat {

    private ListPreference mListPreference;

    @Override
    public void onCreatePreferencesFix(@Nullable Bundle savedInstanceState, String rootKey) {

        // Indicate here the XML resource you created above that holds the preferences
        setPreferencesFromResource(R.xml.preferences, rootKey);
    }

    /*@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        mListPreference = (ListPreference)  getPreferenceManager().findPreference("preference_key");
    mListPreference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
            @Override
            public boolean onPreferenceChange(Preference preference, Object newValue) {
                // your code here
                return view;
            }
        }

        return inflater.inflate(R.layout.fragment_settings_tab, container, false);
    }
}

Answer 1

我真的不知道你的问题是什么！您是否未能实现ListPreference？当您尝试运行时，应用程序是否崩溃？如果是，请提供logcat

同时，试试这个

在你的

preference.xml

加上这个

<PreferenceScreen
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:title="@string/root_title">

<ListPreference
        android:key="list_preference"
        android:title="@string/title_list_preference"
        android:summary="@string/summary_list_preference"
        android:entries="@array/entries_list_preference"
        android:entryValues="@array/entryvalues_list_preference"
        android:dialogTitle="@string/dialog_title_list_preference" />


</PreferenceScreen>

在你的

SettingsTabFragment.java

加上这个

public static class SettingsTabFragment extends PreferenceFragmentCompat 
implements SharedPreferences.OnSharedPreferenceChangeListener{

private ListPreference mListPreference;

    @Override
    public void onCreatePreferences(Bundle savedInstanceState, String 
    rootKey) {
    // Load the preferences from an XML resource
    setPreferencesFromResource(R.xml.preferences, rootKey);
    }

   @Override
   public void onSharedPreferenceChanged(SharedPreferences 
   sharedPreferences, String key) {

    setPreferenceSummery();

    }
private void setPreferenceSummery(Preference preference,Object value){

String stringValue = value.toString();

if (preference instanceof ListPreference){
// For list preferences, look up the correct display value in
// the preference's 'entries' list (since they have separate labels/values).
mListPreference = (ListPreference) preference;

int prefIndex = listPreference.findIndexOfValue(stringValue);
//same code in one line
//int prefIndex = ((ListPreference) preference).findIndexOfValue(value);

//prefIndex must be is equal or garter than zero because
//array count as 0 to ....
if (prefIndex >= 0){
mListPreference.setSummary(mListPreference.getEntries()[prefIndex]);
 }
} else {
// For other preferences, set the summary to the value's simple string 
//representation.
preference.setSummary(stringValue);
   }
}

}