Async task/async task to coroutines

build.gradle

@@ -12,6 +12,7 @@ buildscript {
         sqliteVersion = "2.1.0"
         lifecycleLiveData = "2.3.1"
         biometricVersion="1.0.1"
+        coroutinesVersion= "1.4.2"
 
         // Kotlin
         kotlinVersion = "1.4.32"

owncloudApp/build.gradle

@@ -26,6 +26,10 @@ dependencies {
     implementation "androidx.sqlite:sqlite-ktx:$sqliteVersion"
     implementation "androidx.biometric:biometric:$biometricVersion"
 
+    // Kotlin Coroutines
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutinesVersion"
+
+
     // Image loading
     implementation 'com.github.bumptech.glide:glide:4.12.0'
 

owncloudApp/src/main/java/com/owncloud/android/ui/asynctasks/CopyAndUploadContentUrisTask.java

@@ -25,7 +25,6 @@
 import android.content.ContentResolver;
 import android.content.Context;
 import android.net.Uri;
-import android.os.AsyncTask;
 import android.widget.Toast;
 
 import com.owncloud.android.R;
@@ -44,7 +43,7 @@
 /**
  * AsyncTask to copy a file from a uri in a temporal file
  */
-public class CopyAndUploadContentUrisTask extends AsyncTask<Object, Void, ResultCode> {
+public class CopyAndUploadContentUrisTask extends CoroutinesTask<Object, Void, ResultCode> {
 
     /**
      * Helper method building a correct array of parameters to be passed to {@link #execute(Object[])} )}

owncloudApp/src/main/java/com/owncloud/android/ui/asynctasks/CoroutinesTask.kt

@@ -0,0 +1,39 @@
+package com.owncloud.android.ui.asynctasks
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+abstract class CoroutinesTask<Params, Progress, Result> {
+
+    protected var isCancelled = false
+
+    protected open fun onPreExecute(){}
+
+    protected abstract fun doInBackground(vararg params: Params?): Result
+
+    open fun onProgressUpdate(vararg progress: Progress?) {}
+
+    protected open fun onPostExecute(result: Result?) {}
+
+    fun execute(vararg params: Params?)  {
+        GlobalScope.launch(Dispatchers.Default) {
+            val result = doInBackground(params[0])
+
+            withContext(Dispatchers.Main){
+                onPostExecute(result)
+            }
+        }
+    }
+
+    protected fun publishProgress(vararg progress: Progress?){
+        GlobalScope.launch(Dispatchers.Main) {
+            onProgressUpdate(progress[0])
+        }
+    }
+
+    fun cancel(mayInterruptIfRunning: Boolean) {}
+
+
+}

owncloudApp/src/main/java/com/owncloud/android/ui/preview/PrepareVideoPlayerAsyncTask.java

@@ -5,7 +5,6 @@
 import android.accounts.OperationCanceledException;
 import android.content.Context;
 import android.net.Uri;
-import android.os.AsyncTask;
 import android.os.Handler;
 import android.util.Base64;
 
@@ -23,6 +22,7 @@
 import com.owncloud.android.lib.common.authentication.OwnCloudBasicCredentials;
 import com.owncloud.android.lib.common.authentication.OwnCloudBearerCredentials;
 import com.owncloud.android.lib.common.authentication.OwnCloudCredentials;
+import com.owncloud.android.ui.asynctasks.CoroutinesTask;
 import timber.log.Timber;
 
 import java.io.IOException;
@@ -33,7 +33,7 @@
 /**
  * Task for prepare video player asynchronously
  */
-public class PrepareVideoPlayerAsyncTask extends AsyncTask<Object, Void, MediaSource> {
+public class PrepareVideoPlayerAsyncTask extends CoroutinesTask<Object, Void, MediaSource> {
 
     private Context mContext;
     private final WeakReference<OnPrepareVideoPlayerTaskListener> mListener;

owncloudApp/src/main/java/com/owncloud/android/ui/preview/PreviewTextFragment.java

@@ -21,7 +21,6 @@
 package com.owncloud.android.ui.preview;
 
 import android.accounts.Account;
-import android.os.AsyncTask;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -39,6 +38,7 @@
 import com.owncloud.android.datamodel.FileDataStorageManager;
 import com.owncloud.android.datamodel.OCFile;
 import com.owncloud.android.files.FileMenuFilter;
+import com.owncloud.android.ui.asynctasks.CoroutinesTask;
 import com.owncloud.android.ui.controller.TransferProgressController;
 import com.owncloud.android.ui.dialog.ConfirmationDialogFragment;
 import com.owncloud.android.ui.dialog.LoadingDialog;
@@ -178,7 +178,7 @@ private void loadAndShowTextPreview() {
     /**
      * Reads the file to preview and shows its contents. Too critical to be anonymous.
      */
-    private class TextLoadAsyncTask extends AsyncTask<Object, Void, StringWriter> {
+    private class TextLoadAsyncTask extends CoroutinesTask<Object, Void, StringWriter> {
         private final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
         private final WeakReference<TextView> mTextViewReference;