Android更改 PreferenceFragment 的背景颜色
我使用的 PreferenceFragment 与如下所示的 xml 文件
public class ReaderPreferences extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preference);
}
}
preference.xml：
<PreferenceCategory
android:key="general"
android:title="General" >
<CheckBoxPreference
android:defaultValue="true"
android:key="notify_me"
android:summary="Notify me about quote of the day in notifications"
android:title="Get notification" />
<Preference
android:defaultValue=""
android:key="time"
android:summary="Change time to receive quote of the day"
android:title="Time of Quote of the day" />
</PreferenceCategory>
<PreferenceCategory
android:key="socials"
android:title="Socials and sharing" >
<Preference
android:defaultValue=""
android:key="facebook_login"
android:summary="Sign in with your facebook account"
android:title="Facebook login" />
<Preference
android:defaultValue=""
android:key="facebook_logout"
android:summary="Sign out facebook "
android:title="Facebook logout" />
<CheckBoxPreference
android:defaultValue=""
android:key="facebook_qotd"
android:summary="Share the quote of the day on facebook once it is updated"
android:title="Share QOTD on facebook" />
<Preference
android:defaultValue=""
android:key="twitter_login"
android:summary="Sign in with your twitter account"
android:title="Twitter login" />
<Preference
android:defaultValue=""
android:key="twitter_logout"
android:summary="Sign out twitter"
android:title="Twitter logout" />
<CheckBoxPreference
android:defaultValue=""
android:key="twitter_qotd"
android:summary="Share the quote of the day on twitter once it is updated"
android:title="Share QOTD on twitter" />
</PreferenceCategory>
<PreferenceCategory
android:key="other"
android:title="Other" >
<Preference
android:defaultValue=""
android:key="about"
android:title="About" />
</PreferenceCategory>
如何更改此首选项的背景颜色？和如何设置字体从.ttf 文件吗？
希望有人可以帮助我。先谢谢了。
解决方法 1:
这是一种方法： 你可以用自定义布局和 ListView 创建您自己的 PrefrenceFragment。基本上这是一个简单的片段，返回包含列表视图的视图。通过调用 PreferenceScreen bind() 方法你可以到你自己 ListView 夸大 PreferenceScreen 内容
公共 void 绑定 (ListView listView)
在 API 级别 1 绑定 ListView 添加到此 PreferenceScreen 通过 getRootAdapter() 中所载的首选项。它还处理传递列表项目单击到此 PreferenceScreen 所载的相应首选项。参数 listView 要附加到的列表视图。
CustomPreferenceFragment.java
private PreferenceManager mPreferenceManager;
/**
* The starting request code given out to preference framework.
*/
private static final int FIRST_REQUEST_CODE = 100;
private static final int MSG_BIND_PREFERENCES = 0;
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_BIND_PREFERENCES:
bindPreferences();
break;
}
}
};
private ListView lv;
private int xmlId;
//must be provided
public CustomPreferenceFragment(){
}
@Override
public void onDestroyView(){
super.onDestroyView();
ViewParent p = lv.getParent();
if(p != null)
((ViewGroup)p).removeView(lv);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup root, Bundle savedInstanceState){
Bundle bundle = getArguments();
if(bundle != null){
xmlId = bundle.getInt("xml");
}
View mView = inflater.inflate(R.layout.preference_list_content, null);
mPreferenceManager = onCreatePreferenceManager();
lv = (ListView)mView.findViewById(R.id.listView1);
lv.setBackgroundColor(Color.WHITE);
lv.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
addPreferencesFromResource(xmlId);
setHasOptionsMenu(true);
postBindPreferences();
return mView;
}
@Override
public void onStop(){
super.onStop();
try{
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityStop");
m.setAccessible(true);
m.invoke(mPreferenceManager);
}catch(Exception e){
e.printStackTrace();
}
}
@Override
public void onDestroy() {
super.onDestroy();
lv = null;
try{
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityDestroy");
m.setAccessible(true);
m.invoke(mPreferenceManager);
}catch(Exception e){
e.printStackTrace();
}
}
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putInt("xml", xmlId);
super.onSaveInstanceState(outState);
}
@Override
public void onCreateOptionsMenu (Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.main, menu);
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try{
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityResult", int.class, int.class, Intent.class);
m.setAccessible(true);
m.invoke(mPreferenceManager, requestCode, resultCode, data);
}catch(Exception e){
e.printStackTrace();
}
}
/**
* Posts a message to bind the preferences to the list view.
* <p>
* Binding late is preferred as any custom preference types created in
* {@link #onCreate(Bundle)} are able to have their views recycled.
*/
private void postBindPreferences() {
if (mHandler.hasMessages(MSG_BIND_PREFERENCES)) return;
mHandler.obtainMessage(MSG_BIND_PREFERENCES).sendToTarget();
}
private void bindPreferences() {
final PreferenceScreen preferenceScreen = getPreferenceScreen();
if (preferenceScreen != null) {
preferenceScreen.bind(lv);
}
}
/**
* Creates the {@link PreferenceManager}.
*
* @return The {@link PreferenceManager} used by this activity.
*/
private PreferenceManager onCreatePreferenceManager() {
try{
Constructor<PreferenceManager> c = PreferenceManager.class.getDeclaredConstructor(Activity.class, int.class);
c.setAccessible(true);
PreferenceManager preferenceManager = c.newInstance(this.getActivity(), FIRST_REQUEST_CODE);
return preferenceManager;
}catch(Exception e){
e.printStackTrace();
return null;
}
}
/**
* Returns the {@link PreferenceManager} used by this activity.
* @return The {@link PreferenceManager}.
*/
public PreferenceManager getPreferenceManager() {
return mPreferenceManager;
}
/**
* Sets the root of the preference hierarchy that this activity is showing.
*
* @param preferenceScreen The root {@link PreferenceScreen} of the preference hierarchy.
*/
public void setPreferenceScreen(PreferenceScreen preferenceScreen){
try{
Method m = PreferenceManager.class.getDeclaredMethod("setPreferences", PreferenceScreen.class);
m.setAccessible(true);
boolean result = (Boolean) m.invoke(mPreferenceManager, preferenceScreen);
if (result && preferenceScreen != null) {
postBindPreferences();
}
}catch(Exception e){
e.printStackTrace();
}
}
/**
* Gets the root of the preference hierarchy that this activity is showing.
*
* @return The {@link PreferenceScreen} that is the root of the preference
* hierarchy.
*/
public PreferenceScreen getPreferenceScreen(){
try{
Method m = PreferenceManager.class.getDeclaredMethod("getPreferenceScreen");
m.setAccessible(true);
return (PreferenceScreen) m.invoke(mPreferenceManager);
}catch(Exception e){
e.printStackTrace();
return null;
}
}
/**
* Inflates the given XML resource and adds the preference hierarchy to the current
* preference hierarchy.
*
* @param preferencesResId The XML resource ID to inflate.
*/
public void addPreferencesFromResource(int preferencesResId) {
try{
Method m = PreferenceManager.class.getDeclaredMethod("inflateFromResource", Context.class, int.class, PreferenceScreen.class);
m.setAccessible(true);
PreferenceScreen prefScreen = (PreferenceScreen) m.invoke(mPreferenceManager, getActivity(), preferencesResId, getPreferenceScreen());
setPreferenceScreen(prefScreen);
}catch(Exception e){
e.printStackTrace();
}
}
/**
* Finds a {@link Preference} based on its key.
*
* @param key The key of the preference to retrieve.
* @return The {@link Preference} with the key, or null.
* @see PreferenceGroup#findPreference(CharSequence)
*/
public Preference findPreference(CharSequence key) {
if (mPreferenceManager == null) {
return null;
}
return mPreferenceManager.findPreference(key);
}
}
preference_list_content.xml //Your 自定义列表视图/布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>
</RelativeLayout>
示例如何使用：
MainActivity.java
public class MainActivity extends Activity implements OnSharedPreferenceChangeListener{
private SharedPreferences sharedPref;
private CustomPreferenceFragment frag;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
frag = new CustomPreferenceFragment();
Bundle bundle = new Bundle();
bundle.putInt("xml", R.xml.prefs); //Your preference xml that you want to inflate
frag.setArguments(bundle);
getFragmentManager().beginTransaction().add(R.id.frameLayout, frag).commit();
sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onResume(){
super.onResume();
sharedPref.registerOnSharedPreferenceChangeListener(this);
}
@Override
public void onPause(){
super.onPause();
sharedPref.unregisterOnSharedPreferenceChangeListener(this);
}
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
String key) {
Toast.makeText(this, "Preferences changed, key: " + key, Toast.LENGTH_SHORT).show();
}
}
prefs.xml 去下 res/xml/文件夹：
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" android:title="android custom prefs test">
<Preference android:title="Preference Fragment " android:summary="With custom background" android:key="key_1"/>
<CheckBoxPreference android:title="CheckBoxPref" android:summary="Preference with checkbox" android:key="key_2"/>
<SwitchPreference android:title="SwitchPreference" android:summary="Prefrence with switch" android:key="key_3"/>
</PreferenceScreen>
如何更改此首选项的背景颜色？
在 CustomPreferenceFragment.java：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup root, Bundle savedInstanceState){
lv.setBackgroundColor(Color.WHITE);
}
结果：
