GoogleDriveActivity.java

package javinator9889.securepass.backup;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;

import com.google.android.gms.auth.api.signin.GoogleSignIn;
import com.google.android.gms.auth.api.signin.GoogleSignInClient;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.drive.Drive;
import com.google.android.gms.drive.DriveClient;
import com.google.android.gms.drive.DriveResourceClient;

import javinator9889.securepass.R;

/**
 * Created by Javinator9889 on 22/04/2018.
 */
public class GoogleDriveActivity extends AppCompatActivity {
    private static final String TAG = "drive-quickstart";
    private static final int REQUEST_CODE_SIGN_IN = 0;
    private static final int REQUEST_CODE_CAPTURE_IMAGE = 1;
    private static final int REQUEST_CODE_CREATOR = 2;

    private GoogleSignInClient mGoogleSignInClient;
    private DriveClient mDriveClient;
    private DriveResourceClient mDriveResourceClient;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.drive_client);
        mGoogleSignInClient = buildGoogleSignInClient();
        Toast.makeText(this, "SignIn obtained", Toast.LENGTH_LONG).show();
        startActivityForResult(mGoogleSignInClient.getSignInIntent(), REQUEST_CODE_SIGN_IN);
    }

    private GoogleSignInClient buildGoogleSignInClient() {
        GoogleSignInOptions signInOptions =
                new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                        .requestScopes(Drive.SCOPE_FILE)
                        .build();
        return GoogleSignIn.getClient(this, signInOptions);
    }

    @Override
    protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
        Toast.makeText(this, "Paso 1", Toast.LENGTH_LONG).show();
        super.onActivityResult(requestCode, resultCode, data);
        switch (requestCode) {
            case REQUEST_CODE_SIGN_IN:
                Toast.makeText(this, "Paso 2", Toast.LENGTH_LONG).show();
                Log.i(TAG, "Sign in request code");
                // Called after user is signed in.
                if (resultCode == RESULT_OK) {
                    Toast.makeText(this, "Paso 3", Toast.LENGTH_LONG).show();
                    Log.i(TAG, "Signed in successfully.");
                    // Use the last signed in account here since it already have a Drive scope.
                    mDriveClient = Drive.getDriveClient(this, GoogleSignIn.getLastSignedInAccount(this));
                    // Build a drive resource client.
                    mDriveResourceClient =
                            Drive.getDriveResourceClient(this, GoogleSignIn.getLastSignedInAccount(this));
                    Toast.makeText(this, "Paso 4", Toast.LENGTH_LONG).show();
                    // Start camera.
                }
                break;
            case REQUEST_CODE_CAPTURE_IMAGE:
                Log.i(TAG, "capture image request code");
                // Called after a photo has been taken.
                if (resultCode == Activity.RESULT_OK) {

                }
                break;
            case REQUEST_CODE_CREATOR:
                Log.i(TAG, "creator request code");
                // Called after a file is saved to Drive.
                if (resultCode == RESULT_OK) {

                }
                break;
        }
    }
}