支持用户修改是否从最近任务列表隐藏

Author: Chenhe

app/src/main/AndroidManifest.xml

@@ -70,8 +70,7 @@
 
         <activity
             android:name=".preference.PreferenceAty"
-            android:autoRemoveFromRecents="true"
-            android:excludeFromRecents="true"
+            android:excludeFromRecents="false"
             android:label="@string/activity_splash">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/cc/chenhe/qqnotifyevo/preference/AdvancedFr.kt

@@ -37,6 +37,7 @@ class AdvancedFr : PreferenceFragmentCompat() {
                 true
             }
         }
+        findPreference<SwitchPreferenceCompat>("show_in_recent")!!.summaryProvider = ShowInRecentSummaryProvider()
         deleteLog = findPreference("delete_log")!!
         refreshLogSize()
     }
@@ -104,4 +105,14 @@ class AdvancedFr : PreferenceFragmentCompat() {
             return builder.toString()
         }
     }
+
+    private inner class ShowInRecentSummaryProvider : Preference.SummaryProvider<SwitchPreferenceCompat> {
+
+        private val summaries = requireContext().resources.getStringArray(R.array.pref_show_in_recent_summaries)
+
+        override fun provideSummary(preference: SwitchPreferenceCompat): CharSequence {
+            return if (preference.isChecked) summaries[0] else summaries[1]
+        }
+
+    }
 }

app/src/main/java/cc/chenhe/qqnotifyevo/preference/PreferenceAty.kt

@@ -4,6 +4,7 @@ import android.os.Bundle
 
 import androidx.appcompat.app.AppCompatActivity
 import cc.chenhe.qqnotifyevo.R
+import cc.chenhe.qqnotifyevo.utils.getShowInRecent
 
 class PreferenceAty : AppCompatActivity() {
 
@@ -15,4 +16,12 @@ class PreferenceAty : AppCompatActivity() {
                 .commit()
     }
 
+    override fun onBackPressed() {
+        if (getShowInRecent(this)) {
+            super.onBackPressed()
+        } else {
+            finishAndRemoveTask()
+        }
+    }
+
 }

app/src/main/java/cc/chenhe/qqnotifyevo/utils/PreferencesUtils.kt

@@ -79,6 +79,10 @@ fun fetchAvatarCachePeriod(context: Context): LiveData<Long> {
     }
 }
 
+fun getShowInRecent(context: Context): Boolean {
+    return PreferenceManager.getDefaultSharedPreferences(context).getBoolean("show_in_recent", true)
+}
+
 fun fetchLog(context: Context): SpBooleanLiveData = SpBooleanLiveData(PreferenceManager
         .getDefaultSharedPreferences(context), "log", false, init = true)
 

app/src/main/res/values/strings.xml

@@ -99,6 +99,11 @@
     </string-array>
     <string name="pref_delete_avatar_cache">删除头像缓存</string>
     <string name="pref_delete_nevo_channel">删除 Nevo 通知渠道</string>
+    <string name="pref_show_in_recent">在「最近使用的应用」中显示</string>
+    <string-array name="pref_show_in_recent_summaries">
+        <item>便于锁定最近任务以免被杀</item> <!-- checked -->
+        <item>按返回键退出后将从最近任务界面隐藏</item> <!-- non-checked -->
+    </string-array>
     <string name="pref_cat_debug">调试</string>
     <string name="pref_log">记录日志</string>
     <string name="pref_log_dialog_message">开启后将记录应用日志并明文保存在本地，其中包含您的通知详情，请注意隐私安全。\n请不要从应用外部删除日志文件以免影响完整性。</string>

app/src/main/res/xml/pref_advanced.xml

@@ -16,6 +16,11 @@
         app:key="delete_nevo_channel"
         app:title="@string/pref_delete_nevo_channel" />
 
+    <SwitchPreferenceCompat
+        app:defaultValue="true"
+        app:key="show_in_recent"
+        app:title="@string/pref_show_in_recent" />
+
     <PreferenceCategory app:title="@string/pref_cat_debug">
 
         <SwitchPreferenceCompat