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				| @ -1,52 +0,0 @@ | ||||
| package io.legado.app.help.storage | ||||
| 
 | ||||
| import android.annotation.SuppressLint | ||||
| import android.app.Activity | ||||
| import android.content.Context | ||||
| import android.content.ContextWrapper | ||||
| import android.content.SharedPreferences | ||||
| import io.legado.app.utils.printOnDebug | ||||
| 
 | ||||
| 
 | ||||
| import java.io.File | ||||
| 
 | ||||
| object Preferences { | ||||
| 
 | ||||
|     /** | ||||
|      * 用反射生成 SharedPreferences | ||||
|      * @param context | ||||
|      * @param dir | ||||
|      * @param fileName 文件名,不需要 '.xml' 后缀 | ||||
|      * @return | ||||
|      */ | ||||
|     @SuppressLint("DiscouragedPrivateApi") | ||||
|     fun getSharedPreferences( | ||||
|         context: Context, | ||||
|         dir: String, | ||||
|         fileName: String | ||||
|     ): SharedPreferences? { | ||||
|         try { | ||||
|             // 获取 ContextWrapper对象中的mBase变量。该变量保存了 ContextImpl 对象 | ||||
|             val fieldMBase = ContextWrapper::class.java.getDeclaredField("mBase") | ||||
|             fieldMBase.isAccessible = true | ||||
|             // 获取 mBase变量 | ||||
|             val objMBase = fieldMBase.get(context) | ||||
|             // 获取 ContextImpl。mPreferencesDir变量,该变量保存了数据文件的保存路径 | ||||
|             val fieldMPreferencesDir = objMBase.javaClass.getDeclaredField("mPreferencesDir") | ||||
|             fieldMPreferencesDir.isAccessible = true | ||||
|             // 创建自定义路径 | ||||
|             val file = File(dir) | ||||
|             // 修改mPreferencesDir变量的值 | ||||
|             fieldMPreferencesDir.set(objMBase, file) | ||||
|             // 返回修改路径以后的 SharedPreferences :%FILE_PATH%/%fileName%.xml | ||||
|             return context.getSharedPreferences(fileName, Activity.MODE_PRIVATE) | ||||
|         } catch (e: NoSuchFieldException) { | ||||
|             e.printOnDebug() | ||||
|         } catch (e: IllegalArgumentException) { | ||||
|             e.printOnDebug() | ||||
|         } catch (e: IllegalAccessException) { | ||||
|             e.printOnDebug() | ||||
|         } | ||||
|         return null | ||||
|     } | ||||
| } | ||||
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