| // Copyright 2015 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package io.v.location; |
| |
| import android.app.Activity; |
| import android.content.Intent; |
| import android.graphics.Color; |
| import android.graphics.LightingColorFilter; |
| import android.graphics.drawable.Drawable; |
| import android.os.Bundle; |
| import android.view.Menu; |
| import android.view.MenuInflater; |
| import android.view.MenuItem; |
| import android.view.View; |
| import android.widget.Toast; |
| |
| import io.v.android.libs.security.BlessingsManager; |
| import io.v.android.v23.V; |
| import io.v.android.v23.services.blessing.BlessingCreationException; |
| import io.v.android.v23.services.blessing.BlessingService; |
| import io.v.v23.context.VContext; |
| import io.v.v23.security.Blessings; |
| import io.v.v23.verror.VException; |
| import io.v.v23.vom.VomUtil; |
| |
| /** |
| * To install on a device: |
| * |
| * cd $JIRI_ROOT/vanadium/release/java/projects/location |
| * gradle assembleDebug |
| * adb install -r build/outputs/apk/location-debug.apk |
| * |
| * At runtime, the location service is mounted on the public dev.v.io table. |
| * |
| * To access it from a command line, first get a blessing from dev.v.io. |
| * Assuming you've done a standard install (see instructions at v.io) enter: |
| * |
| * $V_BIN/principal --v23.credentials /tmp/creds seekblessings -browser=false |
| * |
| * Visit the URL using a browser logged into an account that matches the account |
| * used on your device, and click BLESS. This installs a blessing on your |
| * computer that can be used to access your phone's location service. |
| * |
| * For convenience, define a service name env variable: |
| * |
| * serviceName=users/${YOUR_EMAIL}/android/location |
| * |
| * List the service: |
| * |
| * $V_BIN/namespace --v23.credentials /tmp/creds glob -l $serviceName |
| * |
| * Query its signature: |
| * |
| * $V_BIN/vrpc --v23.credentials /tmp/creds signature $serviceName |
| * |
| * Obtain the phone's location: |
| * |
| * $V_BIN/vrpc --v23.credentials /tmp/creds call $serviceName get |
| * |
| */ |
| public class LocationActivity extends Activity { |
| private static final String TAG = "LocationActivity"; |
| private static final int BLESSING_REQUEST = 1; |
| static final String BLESSINGS_KEY = "Blessings"; |
| |
| boolean mStartService = false; |
| VContext mBaseContext; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(R.layout.activity_location); |
| mBaseContext = V.init(this); |
| Drawable d = getResources().getDrawable(R.drawable.ic_account_box_black_36dp); |
| d.setColorFilter(new LightingColorFilter(Color.BLACK, Color.GRAY)); |
| } |
| |
| @Override |
| public boolean onCreateOptionsMenu(Menu menu) { |
| MenuInflater inflater = getMenuInflater(); |
| inflater.inflate(R.menu.main, menu); |
| return super.onCreateOptionsMenu(menu); |
| } |
| |
| public void onStartService(View v) { |
| Blessings blessings = null; |
| try { |
| // See if there are blessings stored in shared preferences. |
| blessings = BlessingsManager.getBlessings(this); |
| } catch (VException e) { |
| String msg = "Error getting blessings from shared preferences " + e.getMessage(); |
| Toast.makeText(this, msg, Toast.LENGTH_SHORT).show(); |
| android.util.Log.e(TAG, msg); |
| } |
| if (blessings == null) { |
| // Request new blessings from the account manager. If successful, this will |
| // start the service with the newly obtained blessings. |
| fetchBlessings(true); |
| return; |
| } |
| startLocationService(blessings); |
| } |
| |
| @Override |
| public boolean onOptionsItemSelected(MenuItem item) { |
| switch (item.getItemId()) { |
| case R.id.action_account: { |
| fetchBlessings(false); |
| return true; |
| } |
| default: |
| return super.onOptionsItemSelected(item); |
| } |
| } |
| |
| private void fetchBlessings(boolean startService) { |
| mStartService = startService; |
| Intent intent = BlessingService.newBlessingIntent(this); |
| startActivityForResult(intent, BLESSING_REQUEST); |
| } |
| |
| @Override |
| protected void onActivityResult(int requestCode, int resultCode, Intent data) { |
| switch (requestCode) { |
| case BLESSING_REQUEST: |
| try { |
| byte[] blessingsVom = BlessingService.extractBlessingReply(resultCode, data); |
| Blessings blessings = (Blessings) VomUtil.decode(blessingsVom, Blessings.class); |
| BlessingsManager.addBlessings(this, blessings); |
| Toast.makeText(this, "Success", Toast.LENGTH_SHORT).show(); |
| if (mStartService) { |
| startLocationService(blessings); |
| } |
| } catch (BlessingCreationException e) { |
| String msg = "Couldn't create blessing: " + e.getMessage(); |
| Toast.makeText(this, msg, Toast.LENGTH_LONG).show(); |
| android.util.Log.e(TAG, msg); |
| } catch (VException e) { |
| String msg = "Couldn't store blessing: " + e.getMessage(); |
| Toast.makeText(this, msg, Toast.LENGTH_LONG).show(); |
| android.util.Log.e(TAG, msg); |
| } |
| return; |
| } |
| } |
| |
| private void startLocationService(Blessings blessings) { |
| try { |
| String blessingsVom = VomUtil.encodeToString(blessings, Blessings.class); |
| Intent intent = new Intent(this, LocationService.class); |
| intent.putExtra(BLESSINGS_KEY, blessingsVom); |
| stopService(intent); |
| startService(intent); |
| } catch (VException e) { |
| String msg = String.format( |
| "Couldn't encode blessings %s: %s", blessings, e.getMessage()); |
| Toast.makeText(this, msg, Toast.LENGTH_LONG).show(); |
| android.util.Log.e(TAG, msg); |
| } |
| } |
| } |