preferencemanager_preferencemanager类_axure有mac版(4)

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);//activity_main里必须存在id为android.R.id.list的ListView否则报E/AndroidRuntime:  Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
        addPreferencesFromResource(R.xml.test_preference);
        mContext=getApplicationContext();
        preference=findPreference(PREFERENCE_KEY);
        preference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
            @Override
            public boolean onPreferenceChange(Preference preference, Object newValue) {
                //如果值改变了我们可以通过这个事件来获取新值
                Toast.makeText(mContext, String.format("Preference的值为%s", newValue),Toast.LENGTH_LONG).show();
                return true;
            }
        });
        //设置Preference的点击事件
        preference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
            @Override
            public boolean onPreferenceClick(Preference preference) {
                //当接收到Click事件之后触发
                Toast.makeText(mContext, "Preference Clicked",Toast.LENGTH_LONG).show();
                return true;
            }
        });
    }

xml属性 说明

true时，系统会帮助我们去保存该设置，即使重启后依然能记忆之前的设置，这也是所谓的持久化 。这里 将 android:persistent设置为False，表明不需要让系统去做持久化，开发者系统通过自己的方式去实现持久化。

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    android:title="PreferenceScreen">
<PreferenceCategory
    android:key="key_prerence"
    android:summary="Preference Categories Summary"
    android:title="Preference Categories">
    <CheckBoxPreference
        android:icon="@mipmap/ic_launcher"
        android:key="key_chkpreference"
        android:title="CheckBoxPreferenceCheckBoxPreferenceCheckBoxPreferenceCheckBoxPreference"
        android:summary="CheckboxPreference summary"/>
    <Preference
        android:title="Preference"
        android:key="key_pre"
        android:icon="@mipmap/ic_red_launcher"
        android:layout="@layout/activity_main"
        />
    <EditTextPreference
        android:icon="@mipmap/ic_blue_launcher"
        android:key="key_edtkpreference"
        android:title="EditPreference"
        android:summary="EditPreference summary"
        />
</PreferenceCategory>
</PreferenceScreen>

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