通过应用程序内置资源实现换肤,典型的应用为QQ空间中换肤的实现. 应用场景为: 应用一般不大,且页面较少,风格相对简单,一般只用实现部分资源或者只用实现背景的更换.
此种换肤方式实现的思路:
1. 把几套皮肤放在res/drawable目录里,然后用SharedPreferences来记录当前皮肤的资源id.然后在程序启动时加载Activity背景。
2. 主要的实现在皮肤管理器SkinManager类中. 将皮肤资源的ID加入集合中. 由该类同一调度皮肤更换,如初始化皮肤,获取当前皮肤符号以及具体的对应资源的更换皮肤.
接下来看一下效果图:
内置皮肤的实现相对比较简单,下面直接上代码:
AndroidMainfest.xml
<?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>
布局文件:
main.xml
<?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>
程序主Activity
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); } }
皮肤管理器:
package com.tony.skindemo; 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(); } } }
就这样,通过程序内置皮肤的基本功能完成了.
若想在自己的应用中实现,仍需注意以下几点(实现起来并不复杂,此处不再写具体实现):
1. 实现多个activity的更换皮肤. 需要利用自定义MyApplication类,继承自Application. 并加入activity的集合属性.用于存储应用所有的activity
修改SkinManager,在更换皮肤时,从application中取出该集合,进行遍历并更换皮肤
2. 可以优化用户体验,通过导航栏方式进入更换皮肤界面,并可以加入预览功能,当确定修改配置后,才完成更换皮肤功能.
3. 加入style.theme等资源,实现更加复杂的皮肤更换. 具体实现同更换背景.