Use asynctask to check for permission

2013-12-09 14:22:17 -08:00
parent caa1680dc6
commit a28c39bea9
3 changed files with 163 additions and 154 deletions
@@ -0,0 +1,134 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.google.android.apps.mytracks.services.tasks;
+
+import com.google.android.apps.mytracks.AbstractSendToGoogleActivity;
+import com.google.android.apps.mytracks.io.sendtogoogle.SendToGoogleUtils;
+import com.google.android.gms.auth.GoogleAuthException;
+import com.google.android.gms.auth.UserRecoverableAuthException;
+import com.google.api.client.googleapis.extensions.android.gms.auth.UserRecoverableAuthIOException;
+
+import android.content.Intent;
+import android.os.AsyncTask;
+import android.util.Log;
+
+import java.io.IOException;
+
+/**
+ * An async task to check permission.
+ * 
+ * @author Jimmy Shih
+ */
+public class CheckPermissionAsyncTask extends AsyncTask<Void, Void, Boolean> {
+
+  private static final String TAG = CheckPermissionAsyncTask.class.getSimpleName();
+
+  private AbstractSendToGoogleActivity activity;
+  private final String accountName;
+  private final String scope;
+
+  /**
+   * True if the AsyncTask result is success.
+   */
+  private boolean success;
+
+  /**
+   * User recoverable intent if failed.
+   */
+  private Intent userRecoverableIntent;
+
+  /**
+   * True if the AsyncTask has completed.
+   */
+  private boolean completed;
+
+  /**
+   * True if can retry the AsyncTask.
+   */
+  private boolean canRetry;
+
+  public CheckPermissionAsyncTask(
+      AbstractSendToGoogleActivity activity, String accountName, String scope) {
+    this.activity = activity;
+    this.accountName = accountName;
+    this.scope = scope;
+    success = false;
+    userRecoverableIntent = null;
+    completed = false;
+    canRetry = true;
+  }
+
+  public void setActivity(AbstractSendToGoogleActivity activity) {
+    this.activity = activity;
+    if (completed && activity != null) {
+      activity.onCheckPermissionDone(scope, success, userRecoverableIntent);
+    }
+  }
+
+  @Override
+  protected Boolean doInBackground(Void... params) {
+    return performTask();
+  }
+
+  @Override
+  protected void onPostExecute(Boolean result) {
+    success = result;
+    completed = true;
+    if (activity != null) {
+      activity.onCheckPermissionDone(scope, success, userRecoverableIntent);
+    }
+  }
+
+  private boolean performTask() {
+    try {
+      SendToGoogleUtils.getGoogleAccountCredential(activity, accountName, scope);
+      return true;
+    } catch (UserRecoverableAuthException e) {
+      try {
+        // HACK: UserRecoverableAuthException.getIntent can throw a null pointer
+        // exception.
+        userRecoverableIntent = e.getIntent();
+        return false;
+      } catch (Exception e1) {
+        Log.e(TAG, "Exception in getIntent", e1);
+        userRecoverableIntent = null;
+        return retryTask();
+      }
+    } catch (GoogleAuthException e) {
+      Log.e(TAG, "GoogleAuthException", e);
+      return retryTask();
+    } catch (UserRecoverableAuthIOException e) {
+      userRecoverableIntent = e.getIntent();
+      return false;
+    } catch (IOException e) {
+      Log.e(TAG, "IOException", e);
+      return retryTask();
+    }
+  }
+
+  private boolean retryTask() {
+    if (isCancelled()) {
+      return false;
+    }
+
+    if (canRetry) {
+      canRetry = false;
+      return performTask();
+    }
+    return false;
+  }
+}