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" > |
03 |
04 | <PreferenceCategory android:title="inline_preferences" > |
05 |
06 | <CheckBoxPreference |
07 | android:key="checkbox_preference" |
08 | android:summary="summary_toggle_preference" |
09 | android:title="title_toggle_preference" /> |
10 | </PreferenceCategory> |
11 |
12 | <PreferenceCategory android:title="dialog_based_preferences" > |
13 |
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" /> |
19 |
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> |
28 |
29 | <PreferenceCategory android:title="launch_preferences" > |
30 |
31 | <PreferenceScreen |
32 | android:key="screen_preference" |
33 | android:summary="summary_screen_preference" |
34 | android:title="title_screen_preference" > |
35 |
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> |
41 |
42 | <PreferenceScreen |
43 | android:summary="summary_intent_preference" |
44 | android:title="title_intent_preference" > |
45 |
46 | <intent |
47 | android:action="android.intent.action.VIEW" |
48 | android:data="http://www.android.com" /> |
49 | </PreferenceScreen> |
50 | </PreferenceCategory> |
51 |
52 | <PreferenceCategory android:title="preference_attributes" > |
53 |
54 | <CheckBoxPreference |
55 | android:key="parent_checkbox_preference" |
56 | android:summary="summary_parent_preference" |
57 | android:title="title_parent_preference" /> |
58 |
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> |
66 |
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. */ |
3 | @Override |
4 | public void onCreate(Bundle savedInstanceState) { |
5 | super.onCreate(savedInstanceState); |
6 | addPreferencesFromResource(R.xml.preferences); |
7 | } |
8 | } |
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); |
09 | } |
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); |
17 | } |
18 | } else { |
19 | preference.setLayoutResource(R.layout.preference); |
20 | } |
21 | } |
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" > |
08 |
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"/> |
15 |
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" > |
24 |
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" |
34 | /> |
35 |
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> |
46 |
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" /> |
53 |
54 | </LinearLayout> |
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" > |
09 |
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" /> |
16 |
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" > |
25 |
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" /> |
35 |
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> |
46 |
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" /> |
53 |
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" > |
08 |
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 |
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" > |
23 |
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" /> |
33 |
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> |
44 |
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" /> |
51 |
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; |
02 |
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; |
08 |
09 | public class PreferenceHead extends Preference { |
10 |
11 | private OnClickListener onBackButtonClickListener; |
12 |
13 | public PreferenceHead(Context context) { |
14 | super(context); |
15 | setLayoutResource(R.layout.preference_head); |
16 | } |
17 |
18 | @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() { |
23 |
24 | @Override |
25 | public void onClick(View v) { |
26 | if (onBackButtonClickListener != null) { |
27 | onBackButtonClickListener.onClick(v); |
28 | } |
29 | } |
30 | }); |
31 | } |
32 |
33 | public void setOnBackButtonClickListener(OnClickListener onClickListener) { |
34 | this.onBackButtonClickListener = onClickListener; |
35 | } |
36 | } |
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" > |
07 |
08 | <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" /> |
14 |
15 | </LinearLayout> |
然后在代码中实现
01 | PreferenceHead ph = new PreferenceHead(this); |
02 | ph.setOnBackButtonClickListener(new OnClickListener() { |
03 |
04 | @Override |
05 | public void onClick(View v) { |
06 | finish(); |
07 | } |
08 | }); |
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
本文介绍如何自定义Android中的PreferenceActivity,包括修改Preference样式、添加顶部布局等。通过XML配置文件和自定义代码实现个性化设置。


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