Android如何实现皮肤的定制与更换

来源：互联网发布：淘宝上的假发编辑：程序博客网时间：2024/05/01 11:16

本篇主要是一个demo，该切换主题的demo里面一共实现了两个功能，其一，搜索已经安装的皮肤，其二，应用安装的皮肤。

主项目包名为org.leepood.skindemo,主题项目的包名为org.leepood.skin.blue,org.leepood.skin.red,等等，只要前缀是org.leepood.skin.就行。

首先是查找已安装主题的代码:

01.package org.leepood.skindemo;
02.
03.import java.util.ArrayList;
04.import java.util.List;
05.
06.import android.app.Activity;
07.import android.app.ProgressDialog;
08.import android.content.Context;
09.import android.content.Intent;
10.import android.content.SharedPreferences;
11.import android.content.pm.PackageInfo;
12.import android.content.pm.PackageManager;
13.import android.content.pm.PackageManager.NameNotFoundException;
14.import android.content.res.Resources;
15.import android.os.Bundle;
16.import android.os.Handler;
17.import android.os.Message;
18.import android.view.ContextMenu;
19.import android.view.LayoutInflater;
20.import android.view.MenuItem;
21.import android.view.View;
22.import android.view.ViewGroup;
23.import android.view.ContextMenu.ContextMenuInfo;
24.import android.view.View.OnCreateContextMenuListener;
25.import android.widget.BaseAdapter;
26.import android.widget.ImageView;
27.import android.widget.ListView;
28.import android.widget.TextView;
29.import android.widget.Toast;
30.import android.widget.AdapterView.AdapterContextMenuInfo;
31.
32.public class Main extends Activity implements SharedPreferences.OnSharedPreferenceChangeListener{
33.
34.    private ListView listview;
35.    private Context c;
36.    private Handler mHandler;
37.    private ProgressDialog pDialog;
38.    private SkinAdapter adapter;
39.    private SharedPreferences sp;
40.    static final int MESSAGE_SEARCHED_SKIN=0;
41.    static final int MESSAGE_SEARCHING_SKIN=MESSAGE_SEARCHED_SKIN+1;
42.    static final int MESSAGE_SEARCHED_SKIN_FOR_NONTHING=MESSAGE_SEARCHING_SKIN+1;
43.
44.    @Override
45.    protected void onCreate(Bundle savedInstanceState) {
46.
47.        super.onCreate(savedInstanceState);
48.        setContentView(R.layout.main);
49.        init();
50.        pDialog.show();
51.        new Thread(serachSkin).start();
52.
53.    }
54.
55.    private void init()
56.    {
57.
58.        c=this;
59.        mHandler=new Handler(){
60.
61.            @Override
62.            public void handleMessage(Message msg) {
63.                switch(msg.what)
64.                {
65.                case MESSAGE_SEARCHED_SKIN:
66.                    ArrayList
67. skins=(ArrayList
68.) msg.obj;//获取skins
69.                    adapter=new SkinAdapter(c, skins);
70.                    listview.setAdapter(adapter);
71.                    Toast.makeText(c, "查找到已经安装的皮肤", 1).show();
72.                    pDialog.dismiss();
73.                    break;
74.                case MESSAGE_SEARCHED_SKIN_FOR_NONTHING:
75.                    Toast.makeText(c, "未查找到任何皮肤", 1).show();
76.                    pDialog.dismiss();
77.                }
78.            }
79.
80.        };
81.        sp=this.getSharedPreferences("config",Context.MODE_WORLD_WRITEABLE);
82.        sp.registerOnSharedPreferenceChangeListener(this);
83.
84.        listview=(ListView) findViewById(R.id.list);
85.        listview.setItemsCanFocus(false);
86.        listview.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
87.
88.        pDialog=new ProgressDialog(this);
89.        pDialog.setMessage("正在查找已经安装的皮肤");
90.
91.        listview.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {
92.
93.            public void onCreateContextMenu(ContextMenu menu, View v,
94.                    ContextMenuInfo menuInfo) {
95.                menu.add("使用该主题");
96.
97.            }
98.        });
99.
100.    }
101.
102.    private Runnable serachSkin =new Runnable(){
103.
104.        public void run() {
105.            PackageManager manager=c.getPackageManager();
106.            List
107. packages=manager.getInstalledPackages(PackageManager.PERMISSION_GRANTED);
108.
109.            ArrayList
110. skins=new ArrayList
111.();
112.            for(PackageInfo info:packages)
113.            {
114.                //System.out.println(info.packageName);
115.                if(info.packageName.startsWith("org.leepood.skin."))
116.                {
117.                    skins.add(info);
118.                }
119.            }
120.            if(skins.size()>0)
121.            {
122.                Message msg=mHandler.obtainMessage();
123.                msg.obj=skins;
124.                msg.what=MESSAGE_SEARCHED_SKIN;
125.                mHandler.sendMessage(msg);
126.            }
127.            else
128.            {
129.                mHandler.sendEmptyMessage(MESSAGE_SEARCHED_SKIN_FOR_NONTHING);
130.            }
131.
132.        }
133.
134.    };
135.    private class SkinAdapter extends BaseAdapter
136.    {
137.
138.        LayoutInflater mInflater;
139.        ArrayList
140. datas;
141.        PackageManager manager;
142.        public SkinAdapter(Context c,ArrayList
143. datas)
144.        {
145.
146.            this.datas=datas;
147.             mInflater=LayoutInflater.from(c);
148.             manager=c.getPackageManager();
149.        }
150.
151.        public int getCount() {
152.
153.            return datas.size();
154.        }
155.
156.        public Object getItem(int position) {
157.
158.            return datas.get(position);
159.        }
160.
161.        public long getItemId(int position) {
162.
163.            return 0;
164.        }
165.
166.        public View getView(int position, View convertView, ViewGroup parent) {
167.
168.            if(convertView==null)
169.            {
170.                convertView=mInflater.inflate(R.layout.skin_item, null);
171.            }
172.            ImageView icon=(ImageView) convertView.findViewById(R.id.skin_icon);
173.            TextView skin_name=(TextView) convertView.findViewById(R.id.skin_name);
174.            PackageInfo info=datas.get(position);
175.            icon.setImageDrawable(info.applicationInfo.loadIcon(manager));
176.            skin_name.setText(info.applicationInfo.loadLabel(manager));
177.            return convertView;
178.        }
179.
180.    }
181.
182.    public void onThemeChanged(String newThemePackageName) {
183.        try {
184.
185.            Context themeContext=this.createPackageContext(newThemePackageName, CONTEXT_IGNORE_SECURITY);
186.            Resources res=themeContext.getResources();
187.            setControlsStyle(res);
188.
189.        } catch (NameNotFoundException e) {
190.
191.            e.printStackTrace();
192.        }
193.
194.    }
195.
196.    private void setControlsStyle(Resources res)
197.    {
198.        listview.setBackgroundColor(res.getColor(R.color.ListView_bg));
199.
200.    }
201.
202.    @Override
203.    public boolean onContextItemSelected(MenuItem item) {
204.        AdapterContextMenuInfo menuInfo=(AdapterContextMenuInfo)item.getMenuInfo();
205.        PackageInfo info=(PackageInfo) adapter.getItem(menuInfo.position);
206.
207.        sp.edit().putString("themePackage", info.packageName).commit();
208.        return super.onContextItemSelected(item);
209.    }
210.
211.    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
212.            String key) {
213.        System.out.println("themeChange");
214.        onThemeChanged(sharedPreferences.getString(key, ""));
215.
216.    }
217.
218.}

这段代码的含义就是去查找系统中安装的包名，若以org.leepood.skin.开头则说明该包为主题包,将其加入listview中显示出来。代码中使用了多线程避免时间过长堵塞UI。程序将当前主题配置保存在SharedPreference中,为SharedPreference注册了一个监听函数，当其值发生改变时自动调用新的样式。当然，这只是个demo而已,一开始加载Activity没有去读取主题，这个可以由大家自己去实现。

Android实现主题切换机制2
昨天花了点时间实现了主题的切换，但是里面还是不够灵活，回去想了想可以用继承和回调函数来进一步灵活更改主题，现在记录下我的实现办法
首先一个自定义类ThemeActivity继承自Activity，这个类是以后所有Activity的父类，在这个类里面定义了一个接口

public interface OnThemeChangedListener
{
public void onChanged(String newThemePackageName);

}
接下来，首先是要给ThemeActivity注册一个主题切换的listener,代码如下:

public void setOnThemeChangedListener(OnThemeChangedListener listener)
{
this.listener=listener;
}
然后就是注册一个SharedPreference来监听xml的变化，当发生改变的时候自动去调用listener.onChanged方法，将新的主题包名传递过去，代码如下:

public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
String key) {
if(key.equals("themePackage"))
{
listener.onChanged(sp.getString("themePackage", ""));
}

}
接着在继承于ThemeActivity的子类里面首先是setOnThemeChangedListener.接着用一个匿名内部类搞定。

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