Android Open Source - TextFileXpanderAndroid Google Auth Activity

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License

The source code is released under:
Apache License
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Java Source Code

//
//  GoogleAuthActivity.java
//  TextFileXpander
///* w w  w .  j  a v a 2s  . c om*/
//  Created by wanswings on 2014/10/05.
//  Copyright (c) 2014 wanswings. All rights reserved.
//
package com.wanswings.TextFileXpander;

import java.io.IOException;
import java.util.Arrays;

import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.api.client.extensions.android.http.AndroidHttp;
import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential;
import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAuthIOException;
import com.google.api.client.googleapis.extensions.android.gms.auth.UserRecoverableAuthIOException;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.About;

import android.accounts.AccountManager;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

public class GoogleAuthActivity extends Activity {

  protected static final String EXTRA_FROM_GOOGLE = "fromGoogle";
  protected static final String EXTRA_RESULT_GOOGLE = "resultGoogle";
  protected static final int REQUEST_AUTHORIZATION = 1;
  protected static final int REQUEST_ACCOUNT_PICKER = 2;

  private String packageName;
  private String classNameForLog;
  private PrivateSharedPrefs prefs;
  private AuthCommon common;
  private ProgressDialog mProgDialog;

  @Override
  protected void onDestroy() {
    Log.i(packageName, classNameForLog + "onDestroy start");
    super.onDestroy();
  }

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    packageName = this.getPackageName();
    classNameForLog = this.getClass().getName() + "...";
    prefs = new PrivateSharedPrefs(this, PrivateSharedPrefs.SAVE_PREFS_NAME_STORAGE);
    common = (AuthCommon)getApplication();
    Log.i(packageName, classNameForLog + "onCreate start");

    setContentView(R.layout.activity_google);
  }

  @Override
  protected void onStart() {
    super.onStart();
    Log.i(packageName, classNameForLog + "onStart start");

    if (common.mGoogleCredential != null) {
      return;
    }

    boolean isError = true;

    ConnectivityManager cm = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo info = cm.getActiveNetworkInfo();
    if (info == null || !info.isConnected()) {
      // offline
      Toast.makeText(GoogleAuthActivity.this, R.string.error_internet_not_available, Toast.LENGTH_LONG).show();
    }
    else {
      if (checkGooglePlayServicesAvailable()) {
        common.mGoogleCredential = GoogleAccountCredential.usingOAuth2(this, Arrays.asList(DriveScopes.DRIVE_READONLY));

        String[] keys = prefs.getKeys(PrivateSharedPrefs.SAVE_KEYS_GOOGLE);
        if (keys == null) {
          startActivityForResult(common.mGoogleCredential.newChooseAccountIntent(), REQUEST_ACCOUNT_PICKER);
        }
        else {
          common.mGoogleCredential.setSelectedAccountName(keys[0]);
          common.mDriveService = new Drive.Builder(
                        AndroidHttp.newCompatibleTransport(),
                        new GsonFactory(),
                        common.mGoogleCredential
                      ).setApplicationName(getPackageName()).build();
          mProgDialog = ProgressDialog.show(this, "", getString(R.string.dialog_authorization));
          getRootFolder();
        }
        isError = false;
      }
      else {
        // Google Play Services not available
        Toast.makeText(GoogleAuthActivity.this, R.string.error_gps_not_available, Toast.LENGTH_LONG).show();
      }
    }
    if (isError) {
      common.mDriveService = null;
      common.mGoogleCredential = null;
      Intent intent = new Intent(this, MainActivity.class);
      intent.putExtra(EXTRA_FROM_GOOGLE, true);
      intent.putExtra(EXTRA_RESULT_GOOGLE, false);
      intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
      intent.setAction(Intent.ACTION_VIEW);
      startActivity(intent);
      finish();
    }
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    Log.i(packageName, classNameForLog + "onActivityResult..." + requestCode);
    switch (requestCode) {
    case REQUEST_AUTHORIZATION:
      if (resultCode == Activity.RESULT_OK) {
        getRootFolder();
      }
      else {
        startActivityForResult(common.mGoogleCredential.newChooseAccountIntent(), REQUEST_ACCOUNT_PICKER);
      }
      break;
    case REQUEST_ACCOUNT_PICKER:
      boolean isError = true;

      if (resultCode == Activity.RESULT_OK && data != null && data.getExtras() != null) {
        String accountName = data.getExtras().getString(AccountManager.KEY_ACCOUNT_NAME);
        if (accountName != null) {
          common.mGoogleCredential.setSelectedAccountName(accountName);

          String[] keys = prefs.getKeys(PrivateSharedPrefs.SAVE_KEYS_GOOGLE);
          if (keys == null || !keys[0].equals(accountName)) {
            prefs.storeKeys(PrivateSharedPrefs.SAVE_KEYS_GOOGLE, new String[]{accountName, ""});
          }

          Log.i(packageName, classNameForLog + "REQUEST_ACCOUNT_PICKER..." + accountName);

          common.mDriveService = new Drive.Builder(
                        AndroidHttp.newCompatibleTransport(),
                        new GsonFactory(),
                        common.mGoogleCredential
                      ).setApplicationName(getPackageName()).build();
          if (mProgDialog != null) {
            mProgDialog.dismiss();
            mProgDialog = null;
          }
          mProgDialog = ProgressDialog.show(this, "", getString(R.string.dialog_authorization));
          getRootFolder();
          isError = false;
        }
      }

      if (isError) {
        if (mProgDialog != null) {
          mProgDialog.dismiss();
          mProgDialog = null;
        }
        common.mDriveService = null;
        common.mGoogleCredential = null;
        Intent intent = new Intent(this, MainActivity.class);
        intent.putExtra(EXTRA_FROM_GOOGLE, true);
        intent.putExtra(EXTRA_RESULT_GOOGLE, false);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        intent.setAction(Intent.ACTION_VIEW);
        startActivity(intent);
        finish();
      }
      break;
    }
  }

  private void getRootFolder() {
    (new Thread(new Runnable() {
      @Override
      public void run() {
        try {
          About about = common.mDriveService.about().get().execute();
          common.mDriveRootFolderId = about.getRootFolderId();

          if (mProgDialog != null) {
            mProgDialog.dismiss();
            mProgDialog = null;
          }
          Intent intent = new Intent(GoogleAuthActivity.this, MainActivity.class);
          intent.putExtra(EXTRA_FROM_GOOGLE, true);
          intent.putExtra(EXTRA_RESULT_GOOGLE, true);
          intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
          intent.setAction(Intent.ACTION_VIEW);
          startActivity(intent);
          finish();
        }
        catch (UserRecoverableAuthIOException e) {
          startActivityForResult(e.getIntent(), REQUEST_AUTHORIZATION);
        }
        catch (GoogleAuthIOException e) {
          e.printStackTrace();
        }
        catch (IOException e) {
          e.printStackTrace();
        }
      }
    })).start();
  }

  // Check that Google Play Services APK is installed and up to date.
  private boolean checkGooglePlayServicesAvailable() {
    final int connectionStatusCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
    if (GooglePlayServicesUtil.isUserRecoverableError(connectionStatusCode)) {
      return false;
    }
    return true;
  }
}
Java Source Code List
