add file fetching at the search activity

app/src/main/kotlin/com/simplemobiletools/gallery/pro/activities/SearchActivity.kt

@@ -8,14 +8,20 @@ import android.view.MenuItem
 import androidx.appcompat.widget.SearchView
 import androidx.core.view.MenuItemCompat
 import com.simplemobiletools.gallery.pro.R
+import com.simplemobiletools.gallery.pro.asynctasks.GetMediaAsynctask
+import com.simplemobiletools.gallery.pro.extensions.getCachedMedia
+import com.simplemobiletools.gallery.pro.models.ThumbnailItem
 
 class SearchActivity : SimpleActivity() {
     private var mIsSearchOpen = false
     private var mSearchMenuItem: MenuItem? = null
+    private var mCurrAsyncTask: GetMediaAsynctask? = null
+    private var mAllMedia = ArrayList<ThumbnailItem>()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_search)
+        getAllMedia()
     }
 
     override fun onStop() {
@@ -23,6 +29,11 @@ class SearchActivity : SimpleActivity() {
         mSearchMenuItem?.collapseActionView()
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        mCurrAsyncTask?.stopFetching()
+    }
+
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.menu_search, menu)
         setupSearch(menu)
@@ -68,4 +79,22 @@ class SearchActivity : SimpleActivity() {
     private fun textChanged(text: String) {
 
     }
+
+    private fun getAllMedia() {
+        getCachedMedia("") {
+            if (it.isNotEmpty()) {
+                mAllMedia = it
+            }
+            startAsyncTask()
+        }
+    }
+
+    private fun startAsyncTask() {
+        mCurrAsyncTask?.stopFetching()
+        mCurrAsyncTask = GetMediaAsynctask(applicationContext, "", showAll = true) {
+            mAllMedia = it
+        }
+
+        mCurrAsyncTask!!.execute()
+    }
 }