pull/2274/head
parent
15f198ba1c
commit
cacfcbdb1b
@ -1,52 +0,0 @@ |
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package io.legado.app.help.storage |
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import android.annotation.SuppressLint |
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import android.app.Activity |
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import android.content.Context |
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import android.content.ContextWrapper |
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import android.content.SharedPreferences |
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import io.legado.app.utils.printOnDebug |
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import java.io.File |
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object Preferences { |
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/** |
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* 用反射生成 SharedPreferences |
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* @param context |
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* @param dir |
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* @param fileName 文件名,不需要 '.xml' 后缀 |
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* @return |
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*/ |
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@SuppressLint("DiscouragedPrivateApi") |
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fun getSharedPreferences( |
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context: Context, |
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dir: String, |
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fileName: String |
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): SharedPreferences? { |
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try { |
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// 获取 ContextWrapper对象中的mBase变量。该变量保存了 ContextImpl 对象 |
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val fieldMBase = ContextWrapper::class.java.getDeclaredField("mBase") |
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fieldMBase.isAccessible = true |
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// 获取 mBase变量 |
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val objMBase = fieldMBase.get(context) |
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// 获取 ContextImpl。mPreferencesDir变量,该变量保存了数据文件的保存路径 |
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val fieldMPreferencesDir = objMBase.javaClass.getDeclaredField("mPreferencesDir") |
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fieldMPreferencesDir.isAccessible = true |
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// 创建自定义路径 |
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val file = File(dir) |
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// 修改mPreferencesDir变量的值 |
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fieldMPreferencesDir.set(objMBase, file) |
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// 返回修改路径以后的 SharedPreferences :%FILE_PATH%/%fileName%.xml |
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return context.getSharedPreferences(fileName, Activity.MODE_PRIVATE) |
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} catch (e: NoSuchFieldException) { |
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e.printOnDebug() |
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} catch (e: IllegalArgumentException) { |
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e.printOnDebug() |
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} catch (e: IllegalAccessException) { |
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e.printOnDebug() |
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} |
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return null |
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} |
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} |
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