安卓应用实现换肤功能 分析Android App中内置换肤功能的实现方式

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
 package="com.tony.skindemo" 
 android:versionCode="1" 
 android:versionName="1.0" > 
 
 <uses-sdk android:minSdkVersion="8" /> 
 
 <application 
  android:icon="@drawable/ic_launcher" 
  android:label="@string/app_name" > 
  <activity 
   android:label="@string/app_name" 
   android:name="com.tony.skindemo.SkinDemoActivity" > 
   <intent-filter > 
    <action android:name="android.intent.action.MAIN" /> 
 
    <category android:name="android.intent.category.LAUNCHER" /> 
   </intent-filter> 
  </activity> 
   
   
 </application> 
 
</manifest> 

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 android:orientation="vertical" > 
 
 <TextView 
  android:textColor="#ff00ff" 
  android:text="程序皮肤更换" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" /> 
<RadioGroup 
  android:id="@+id/skin_options" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
   > 
 
  <RadioButton 
   android:layout_weight="1" 
   android:id="@+id/radioButton1" 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   android:text="风格1" /> 
 
  <RadioButton 
   android:layout_weight="1" 
   android:id="@+id/radioButton2" 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   android:text="风格2" /> 
 
  <RadioButton 
   android:layout_weight="1" 
   android:id="@+id/radioButton3" 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   android:text="风格3" /> 
 
  <RadioButton 
   android:layout_weight="1" 
   android:id="@+id/radioButton4" 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   android:text="风格4" /> 
 
  <RadioButton 
   android:layout_weight="1" 
   android:id="@+id/radioButton5" 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   android:text="风格5" /> 
 </RadioGroup> 
 
</LinearLayout> 

package com.tony.skindemo; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.MotionEvent; 
import android.view.Window; 
import android.view.WindowManager; 
import android.widget.RadioButton; 
import android.widget.RadioGroup; 
import android.widget.RadioGroup.OnCheckedChangeListener; 
 
public class SkinDemoActivity extends Activity { 
 
 private SkinSettingManager mSettingManager; 
 private RadioButton radioButton1; 
 private RadioButton radioButton2; 
 private RadioButton radioButton3; 
 private RadioButton radioButton4; 
 private RadioButton radioButton5; 
 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
 
  // 取消标题栏 
  requestWindowFeature(Window.FEATURE_NO_TITLE); 
  // 完成窗体的全屏显示 // 取消掉状态栏 
  getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
    WindowManager.LayoutParams.FLAG_FULLSCREEN); 
 
  setContentView(R.layout.main); 
  // 初始化皮肤 
  mSettingManager = new SkinSettingManager(this); 
  mSettingManager.initSkins(); 
 
  //通过单选按钮设置皮肤(可自定义更换的方式，如导航栏，也可以加上预览功能，此处不再实现) 
  radioButton1 = (RadioButton) findViewById(R.id.radioButton1); 
  radioButton2 = (RadioButton) findViewById(R.id.radioButton2); 
  radioButton3 = (RadioButton) findViewById(R.id.radioButton3); 
  radioButton4 = (RadioButton) findViewById(R.id.radioButton4); 
  radioButton5 = (RadioButton) findViewById(R.id.radioButton5); 
  RadioGroup radioGroup = (RadioGroup) findViewById(R.id.skin_options); 
  radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() { 
 
   @Override 
   public void onCheckedChanged(RadioGroup group, int checkedId) { 
 
    switch (checkedId) { 
    case R.id.radioButton1: 
     mSettingManager.changeSkin(1); 
     break; 
 
    case R.id.radioButton2: 
     mSettingManager.changeSkin(2); 
     break; 
    case R.id.radioButton3: 
     mSettingManager.changeSkin(3); 
     break; 
    case R.id.radioButton4: 
     mSettingManager.changeSkin(4); 
     break; 
    case R.id.radioButton5: 
     mSettingManager.changeSkin(5); 
     break; 
    default: 
     break; 
    } 
   } 
  }); 
 } 
 
 // 这里为了简单实现，实现换肤 
 public boolean onTouchEvent(MotionEvent event) { 
  mSettingManager.toggleSkins(); 
  return super.onTouchEvent(event); 
 } 
 
 
} 

import android.app.Activity; 
import android.content.SharedPreferences; 
 
/** 
 * 皮肤管理器 
 * @author tony 
 * 
 */ 
public class SkinSettingManager { 
 
 
 public final static String SKIN_PREF = "skinSetting"; 
  
 public SharedPreferences skinSettingPreference; 
  
 private int[] skinResources = { R.drawable.default_wallpaper, 
   R.drawable.wallpaper_c,R.drawable.wallpaper_d,R.drawable.wallpaper_f, 
   R.drawable.wallpaper_g 
 }; 
  
 private Activity mActivity; 
  
  
 public SkinSettingManager(Activity activity) { 
  this.mActivity = activity; 
  skinSettingPreference = mActivity.getSharedPreferences(SKIN_PREF, 3); 
 } 
  
 /** 
  * 获取当前程序的皮肤序号 
  * 
  * @return 
  */ 
 public int getSkinType() { 
  String key = "skin_type"; 
  return skinSettingPreference.getInt(key, 0); 
 } 
 
 /** 
  * 把皮肤序号写到全局设置里去 
  * 
  * @param j 
  */ 
 public void setSkinType(int j) { 
  SharedPreferences.Editor editor = skinSettingPreference.edit(); 
  String key = "skin_type"; 
   
  editor.putInt(key, j); 
  editor.commit(); 
 } 
  
 /** 
  * 获取当前皮肤的背景图资源id 
  * 
  * @return 
  */ 
 public int getCurrentSkinRes() { 
  int skinLen = skinResources.length; 
  int getSkinLen = getSkinType(); 
  if(getSkinLen >= skinLen){ 
   getSkinLen = 0; 
  } 
   
  return skinResources[getSkinLen]; 
 } 
  
 public void toggleSkins(){ 
   
  int skinType = getSkinType(); 
  if(skinType == skinResources.length - 1){ 
   skinType = 0; 
  }else{   
   skinType ++; 
  } 
  setSkinType(skinType); 
  mActivity.getWindow().setBackgroundDrawable(null); 
  try { 
   mActivity.getWindow().setBackgroundDrawableResource(getCurrentSkinRes()); 
  } catch (Throwable e) { 
   e.printStackTrace(); 
 
  } 
   
   
 } 
   
 /** 
  * 用于初始化皮肤 
  */ 
 public void initSkins(){  
  mActivity.getWindow().setBackgroundDrawableResource(getCurrentSkinRes()); 
 } 
 
 /** 
  * 随即切换一个背景皮肤 
  */ 
 public void changeSkin(int id) { 
   
  setSkinType(id); 
  mActivity.getWindow().setBackgroundDrawable(null); 
  try { 
   mActivity.getWindow().setBackgroundDrawableResource(getCurrentSkinRes()); 
  } catch (Throwable e) { 
   e.printStackTrace(); 
  } 
 } 
 
}