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138 changes: 138 additions & 0 deletions
138
store_lib/src/main/java/com/kiylx/store_lib/StorageXHelper.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| package com.kiylx.store_lib | ||
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|
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| import androidx.fragment.app.Fragment | ||
| import androidx.fragment.app.FragmentActivity | ||
| import androidx.fragment.app.FragmentManager | ||
| import androidx.lifecycle.Lifecycle | ||
| import androidx.lifecycle.LifecycleEventObserver | ||
| import androidx.lifecycle.LifecycleOwner | ||
| import com.kiylx.store_lib.mediastore.MediaStoreFragment | ||
| import com.kiylx.store_lib.mediastore.MediaStoreMethod | ||
| import com.kiylx.store_lib.saf.FileMethod | ||
| import com.kiylx.store_lib.saf.SafImplFragment | ||
|
|
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| class StorageXHelper : LifecycleEventObserver { | ||
| private var activity: FragmentActivity | ||
| set(value) { | ||
| field = value | ||
| value.lifecycle.addObserver(this) | ||
| } | ||
| private var fragment: Fragment? = null | ||
|
|
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| constructor(fragment: Fragment) { | ||
| this.fragment = fragment | ||
| this.activity = fragment.requireActivity() | ||
| } | ||
|
|
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| constructor(fragmentActivity: FragmentActivity) { | ||
| this.activity = fragmentActivity | ||
| } | ||
|
|
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| /** | ||
| * 在Activity中获取 FragmentManager，如果在Fragment中，则获取 ChildFragmentManager。 | ||
| */ | ||
| private val fragmentManager: FragmentManager | ||
| get() { | ||
| return fragment?.childFragmentManager ?: activity.supportFragmentManager | ||
| } | ||
|
|
||
| /** | ||
| * 使用此实例操作文件 | ||
| */ | ||
| val safHelper: SafHelper.Helper by lazy { | ||
| SafHelper(fragmentManager).helper | ||
| } | ||
|
|
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| val mediaStoreHelper: MediaStoreHelper.Helper by lazy { | ||
| MediaStoreHelper(fragmentManager).helper | ||
| } | ||
|
|
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| companion object { | ||
| /** | ||
| * TAG of InvisibleFragment to find and create. | ||
| */ | ||
| internal const val SAF_FRAGMENT_TAG = "SafInvisibleFragment" | ||
|
|
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| /** | ||
| * MediaStore Fragment tag | ||
| */ | ||
| internal const val MS_FRAGMENT_TAG = "MediaStoreInvisibleFragment" | ||
|
|
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| } | ||
|
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| override fun onStateChanged(source: LifecycleOwner, event: Lifecycle.Event) { | ||
| if (event == Lifecycle.Event.ON_DESTROY) { | ||
| val t = fragmentManager.beginTransaction() | ||
| val existed1 = fragmentManager.findFragmentByTag(SAF_FRAGMENT_TAG) | ||
| val existed2 = fragmentManager.findFragmentByTag(MS_FRAGMENT_TAG) | ||
| if (existed2 != null) { | ||
| t.remove(existed2) | ||
| } | ||
| if (existed1 != null) { | ||
| t.remove(existed1) | ||
| } | ||
| t.commitAllowingStateLoss() | ||
| } | ||
| } | ||
| } | ||
|
|
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| class SafHelper(private val fragmentManager: FragmentManager) { | ||
| private val invisibleFragment: SafImplFragment | ||
| get() { | ||
| val existed = fragmentManager.findFragmentByTag(StorageXHelper.SAF_FRAGMENT_TAG) | ||
| if (existed != null) { | ||
| return existed as SafImplFragment | ||
| } else { | ||
| val invisibleFragment = SafImplFragment() | ||
| fragmentManager.beginTransaction() | ||
| .add(invisibleFragment, StorageXHelper.SAF_FRAGMENT_TAG) | ||
| .commitNowAllowingStateLoss() | ||
| return invisibleFragment | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * 使用此实例操作文件 | ||
| */ | ||
| val helper: Helper by lazy { | ||
| Helper(invisibleFragment) | ||
| } | ||
|
|
||
| /** | ||
| * 所有的文件操作，全部委托给[invisibleFragment] | ||
| * 使用委托的方式，隐藏掉fragment，只向外界提供接口的实现 | ||
| */ | ||
| inner class Helper(private val invisibleFragment: SafImplFragment) : | ||
| FileMethod by invisibleFragment | ||
| } | ||
|
|
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| class MediaStoreHelper(private val fragmentManager: FragmentManager) { | ||
| private val invisibleFragment: MediaStoreFragment | ||
| get() { | ||
| val existed = fragmentManager.findFragmentByTag(StorageXHelper.MS_FRAGMENT_TAG) | ||
| if (existed != null) { | ||
| return existed as MediaStoreFragment | ||
| } else { | ||
| val invisibleFragment = MediaStoreFragment() | ||
| fragmentManager.beginTransaction() | ||
| .add(invisibleFragment, StorageXHelper.MS_FRAGMENT_TAG) | ||
| .commitNowAllowingStateLoss() | ||
| return invisibleFragment | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * 使用此实例操作文件 | ||
| */ | ||
| val helper: Helper by lazy { | ||
| Helper(invisibleFragment) | ||
| } | ||
|
|
||
| /** | ||
| * 所有的文件操作，全部委托给[invisibleFragment] | ||
| * 使用委托的方式，隐藏掉fragment，只向外界提供接口的实现 | ||
| */ | ||
| inner class Helper(private val invisibleFragment: MediaStoreFragment) : | ||
| MediaStoreMethod by invisibleFragment | ||
|
|
||
| } |
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