您的位置：首页 > Web前端 > CSS

自定义PreferenceActivity——修改Preference样式、加顶部布局

2012-11-08 13:58 405 查看

自定义PreferenceActivity——修改Preference样式、加顶部布局

首先在res/xml文件夹下建立preferences.xml

01	<? xml version = "1.0" encoding = "utf-8" ?>

02	< PreferenceScreen xmlns:android = "http://schemas.android.com/apk/res/android" >

04	< PreferenceCategory android:title = "inline_preferences" >

06	< CheckBoxPreference

07	android:key = "checkbox_preference"

08	android:summary = "summary_toggle_preference"

09	android:title = "title_toggle_preference" />

10	</ PreferenceCategory >

12	< PreferenceCategory android:title = "dialog_based_preferences" >

14	< EditTextPreference

15	android:dialogTitle = "dialog_title_edittext_preference"

16	android:key = "edittext_preference"

17	android:summary = "summary_edittext_preference"

18	android:title = "title_edittext_preference" />

20	< ListPreference

21	android:dialogTitle = "dialog_title_list_preference"

22	android:entries = "@array/entries_list_preference"

23	android:entryValues = "@array/entryvalues_list_preference"

24	android:key = "list_preference"

25	android:summary = "summary_list_preference"

26	android:title = "title_list_preference" />

27	</ PreferenceCategory >

29	< PreferenceCategory android:title = "launch_preferences" >

31	< PreferenceScreen

32	android:key = "screen_preference"

33	android:summary = "summary_screen_preference"

34	android:title = "title_screen_preference" >

36	< CheckBoxPreference

37	android:key = "next_screen_checkbox_preference"

38	android:summary = "summary_next_screen_toggle_preference"

39	android:title = "title_next_screen_toggle_preference" />

40	</ PreferenceScreen >

42	< PreferenceScreen

43	android:summary = "summary_intent_preference"

44	android:title = "title_intent_preference" >

intent

47	android:action = "android.intent.action.VIEW"

48	android:data = "http://www.android.com" />

49	</ PreferenceScreen >

50	</ PreferenceCategory >

52	< PreferenceCategory android:title = "preference_attributes" >

54	< CheckBoxPreference

55	android:key = "parent_checkbox_preference"

56	android:summary = "summary_parent_preference"

57	android:title = "title_parent_preference" />

59	< CheckBoxPreference

60	android:dependency = "parent_checkbox_preference"

61	android:key = "child_checkbox_preference"

62	android:layout = "?android:attr/preferenceLayoutChild"

63	android:summary = "summary_child_preference"

64	android:title = "title_child_preference" />

65	</ PreferenceCategory >

67	</ PreferenceScreen >

然后在代码中加载preferences.xml

1	public class MyPreferenceActivity extends PreferenceActivity {

2	/** Called when the activity is first created. */

@Override

4	public void onCreate(Bundle savedInstanceState) {

5	super .onCreate(savedInstanceState);

6	addPreferencesFromResource(R.xml.preferences);

这样就创建了从xml加载preferences的默认的PreferenceActivity。

在加载了preferences.xml的PreferenceActivity中， a top-level preference是一个PreferenceScreen，可用getPreferenceScreen()获取。PreferenceScreen和PreferenceCategory继承自PreferenceGroup，它们可以包含一个或多个PreferenceScreen，PreferenceCategory或者是具体的preference（如EditTextPreference、CheckBoxPreference）。由于PreferenceScreen，PreferenceCategory，EditTextPreference等都是继承自Preference，因此可以通过setLayoutResource()方法设置自己的布局样式。下面将遍历所有Preference，并设置自己的样式，代码如下：

01	private void setLayoutResource(Preference preference) {

02	if (preference instanceof PreferenceScreen) {

03	PreferenceScreen ps = (PreferenceScreen) preference;

04	ps.setLayoutResource(R.layout.preference_screen);

05	int cnt = ps.getPreferenceCount();

06	for ( int i = 0 ; i < cnt; ++i) {

07	Preference p = ps.getPreference(i);

08	setLayoutResource(p);

10	} else if (preference instanceof PreferenceCategory) {

11	PreferenceCategory pc = (PreferenceCategory) preference;

12	pc.setLayoutResource(R.layout.preference_category);

13	int cnt = pc.getPreferenceCount();

14	for ( int i = 0 ; i < cnt; ++i) {

15	Preference p = pc.getPreference(i);

16	setLayoutResource(p);

18	} else {

19	preference.setLayoutResource(R.layout.preference);

1	PreferenceScreen preferenceScreen = getPreferenceScreen();

2	setLayoutResource(preferenceScreen);

preference_screen.xml

01	<? xml version = "1.0" encoding = "utf-8" ?>

02	< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"

03	android:layout_width = "match_parent"

04	android:layout_height = "wrap_content"

05	android:gravity = "center_vertical"

06	android:minHeight = "?android:attr/listPreferredItemHeight"

07	android:paddingRight = "?android:attr/scrollbarSize" >

09	< ImageView

10	android:id = "@+android:id/icon"

11	android:layout_width = "wrap_content"

12	android:layout_height = "wrap_content"

13	android:layout_gravity = "center"

14	android:src = "@drawable/ic_launcher" />

16	< RelativeLayout

17	android:layout_width = "wrap_content"

18	android:layout_height = "wrap_content"

19	android:layout_marginBottom = "6dip"

20	android:layout_marginLeft = "15dip"

21	android:layout_marginRight = "6dip"

22	android:layout_marginTop = "6dip"

23	android:layout_weight = "1" >

25	< TextView

26	android:id = "@+android:id/title"

27	android:layout_width = "wrap_content"

28	android:layout_height = "wrap_content"

29	android:ellipsize = "marquee"

30	android:fadingEdge = "horizontal"

31	android:singleLine = "true"

32	android:textAppearance = "@android:style/TextAppearance.Large"

33	android:textColor = "#FFFF1234"

/>

36	< TextView

37	android:id = "@+android:id/summary"

38	android:layout_width = "wrap_content"

39	android:layout_height = "wrap_content"

40	android:layout_alignLeft = "@android:id/title"

41	android:layout_below = "@android:id/title"

42	android:maxLines = "4"

43	android:textAppearance = "@android:style/TextAppearance.Small"

44	android:textColor = "#FF888888" />

45	</ RelativeLayout >

47	< LinearLayout

48	android:id = "@+android:id/widget_frame"

49	android:layout_width = "wrap_content"

50	android:layout_height = "match_parent"

51	android:gravity = "center_vertical"

52	android:orientation = "vertical" />

54	</ LinearLayout >

preference_category.xml

01	<? xml version = "1.0" encoding = "utf-8" ?>

02	< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"

03	android:layout_width = "match_parent"

04	android:layout_height = "wrap_content"

05	android:background = "#FF123456"

06	android:gravity = "center_vertical"

07	android:minHeight = "?android:attr/listPreferredItemHeight"

08	android:paddingRight = "?android:attr/scrollbarSize" >

10	< ImageView

11	android:id = "@+android:id/icon"

12	android:layout_width = "wrap_content"

13	android:layout_height = "wrap_content"

14	android:layout_gravity = "center"

15	android:src = "@drawable/ic_launcher" />

17	< RelativeLayout

18	android:layout_width = "wrap_content"

19	android:layout_height = "wrap_content"

20	android:layout_marginBottom = "6dip"

21	android:layout_marginLeft = "15dip"

22	android:layout_marginRight = "6dip"

23	android:layout_marginTop = "6dip"

24	android:layout_weight = "1" >

26	< TextView

27	android:id = "@+android:id/title"

28	android:layout_width = "wrap_content"

29	android:layout_height = "wrap_content"

30	android:ellipsize = "marquee"

31	android:fadingEdge = "horizontal"

32	android:singleLine = "true"

33	android:textAppearance = "@android:style/TextAppearance.Large"

34	android:textColor = "#FFFF0000" />

36	< TextView

37	android:id = "@+android:id/summary"

38	android:layout_width = "wrap_content"

39	android:layout_height = "wrap_content"

40	android:layout_alignLeft = "@android:id/title"

41	android:layout_below = "@android:id/title"

42	android:maxLines = "4"

43	android:textAppearance = "@android:style/TextAppearance.Small"

44	android:textColor = "#FF00FF00" />

45	</ RelativeLayout >

47	< LinearLayout

48	android:id = "@+android:id/widget_frame"

49	android:layout_width = "wrap_content"

50	android:layout_height = "match_parent"

51	android:gravity = "center_vertical"

52	android:orientation = "vertical" />

54	</ LinearLayout >

preference.xml

01	<? xml version = "1.0" encoding = "utf-8" ?>

02	< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"

03	android:layout_width = "match_parent"

04	android:layout_height = "wrap_content"

05	android:gravity = "center_vertical"

06	android:minHeight = "?android:attr/listPreferredItemHeight"

07	android:paddingRight = "?android:attr/scrollbarSize" >

09	< ImageView

10	android:id = "@+android:id/icon"

11	android:layout_width = "wrap_content"

12	android:layout_height = "wrap_content"

13	android:layout_gravity = "center" />

15	< RelativeLayout

16	android:layout_width = "wrap_content"

17	android:layout_height = "wrap_content"

18	android:layout_marginBottom = "6dip"

19	android:layout_marginLeft = "15dip"

20	android:layout_marginRight = "6dip"

21	android:layout_marginTop = "6dip"

22	android:layout_weight = "1" >

24	< TextView

25	android:id = "@+android:id/title"

26	android:layout_width = "wrap_content"

27	android:layout_height = "wrap_content"

28	android:ellipsize = "marquee"

29	android:fadingEdge = "horizontal"

30	android:singleLine = "true"

31	android:textAppearance = "@android:style/TextAppearance.Medium"

32	android:textColor = "#FF00FFFF" />

34	< TextView

35	android:id = "@+android:id/summary"

36	android:layout_width = "wrap_content"

37	android:layout_height = "wrap_content"

38	android:layout_alignLeft = "@android:id/title"

39	android:layout_below = "@android:id/title"

40	android:maxLines = "4"

41	android:textAppearance = "@android:style/TextAppearance.Small"

42	android:textColor = "#FFFFFF00" />

43	</ RelativeLayout >

45	< LinearLayout

46	android:id = "@+android:id/widget_frame"

47	android:layout_width = "wrap_content"

48	android:layout_height = "match_parent"

49	android:gravity = "center_vertical"

50	android:orientation = "vertical" />

52	</ LinearLayout >

下面介绍加顶部布局，其实也是添加加一个preference，通过preferenceScreen的addPreference添加。首先自定义一个PreferenceHead，布局中有一个返回按钮。

01	package com.preference.main;

03	import android.content.Context;

04	import android.preference.Preference;

05	import android.view.View;

06	import android.view.View.OnClickListener;

07	import android.widget.Button;

09	public class PreferenceHead extends Preference {

11	private OnClickListener onBackButtonClickListener;

13	public PreferenceHead(Context context) {

14	super (context);

15	setLayoutResource(R.layout.preference_head);

@Override

19	protected void onBindView(View view) {

20	super .onBindView(view);

21	Button btBack = (Button) view.findViewById(R.id.back);

22	btBack.setOnClickListener( new OnClickListener() {

@Override

25	public void onClick(View v) {

26	if (onBackButtonClickListener != null ) {

27	onBackButtonClickListener.onClick(v);

});

33	public void setOnBackButtonClickListener(OnClickListener onClickListener) {

34	this .onBackButtonClickListener = onClickListener;

01	<?xml version= "1.0" encoding= "utf-8" ?>

02	<LinearLayout xmlns:android= "http://schemas.android.com/apk/res/android"

03	android:layout_width= "match_parent"

04	android:layout_height= "60.0dip"

05	android:background= "#8000FF00"

06	android:gravity= "center_vertical" >

<Button

09	android:id= "@+id/back"

10	android:layout_width= "wrap_content"

11	android:layout_height= "wrap_content"

12	android:layout_margin= "10.0dip"

13	android:text= "返回" />

15	</LinearLayout>

然后在代码中实现

01	PreferenceHeadph = new PreferenceHead( this );

02	ph.setOnBackButtonClickListener( new OnClickListener() {

@Override

05	public void onClick(View v) {

finish();

});

09	ph.setOrder( 0 );

10	preferenceScreen.addPreference(ph);

这样就完成了一个具有返回按钮的顶部布局的
PreferenceActivity，效果图如下

转：http://my.oschina.net/eclipse88/blog/52316

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航