wearable/runtimepermissions/MainWearActivity.java

/*
 * Copyright (C) 2015 Google Inc. All Rights Reserved.
 *
 * 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.example.android.wearable.runtimepermissions;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.hardware.Sensor;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.os.Looper;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.wearable.activity.WearableActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.example.android.wearable.runtimepermissions.common.Constants;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.PendingResult;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.wearable.CapabilityApi;
import com.google.android.gms.wearable.CapabilityInfo;
import com.google.android.gms.wearable.DataMap;
import com.google.android.gms.wearable.MessageApi;
import com.google.android.gms.wearable.MessageEvent;
import com.google.android.gms.wearable.Node;
import com.google.android.gms.wearable.Wearable;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;

/**
 * Displays data that requires runtime permissions both locally (BODY_SENSORS) and remotely on
 * the phone (READ_EXTERNAL_STORAGE).
 *
 * The class is also launched by IncomingRequestWearService when the permission for the data the
 * phone is trying to access hasn't been granted (wear's sensors). If granted in that scenario,
 * this Activity also sends back the results of the permission request to the phone device (and
 * the sensor data if approved).
 */
public class MainWearActivity extends WearableActivity implements
        GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener,
        CapabilityApi.CapabilityListener,
        MessageApi.MessageListener,
        ActivityCompat.OnRequestPermissionsResultCallback {

    private static final String TAG = "MainWearActivity";

    /* Id to identify local permission request for body sensors. */
    private static final int PERMISSION_REQUEST_READ_BODY_SENSORS = 1;

    /* Id to identify starting/closing RequestPermissionOnPhoneActivity (startActivityForResult). */
    private static final int REQUEST_PHONE_PERMISSION = 1;

    public static final String EXTRA_PROMPT_PERMISSION_FROM_PHONE =
            "com.example.android.wearable.runtimepermissions.extra.PROMPT_PERMISSION_FROM_PHONE";

    private boolean mWearBodySensorsPermissionApproved;
    private boolean mPhoneStoragePermissionApproved;

    private boolean mPhoneRequestingWearSensorPermission;

    private Button mWearBodySensorsPermissionButton;
    private Button mPhoneStoragePermissionButton;
    private TextView mOutputTextView;

    private String mPhoneNodeId;

    private GoogleApiClient mGoogleApiClient;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.d(TAG, "onCreate()");
        super.onCreate(savedInstanceState);;

        /*
         * Since this is a remote permission, we initialize it to false and then check the remote
         * permission once the GoogleApiClient is connected.
         */
        mPhoneStoragePermissionApproved = false;

        setContentView(R.layout.activity_main);
        setAmbientEnabled();

        // Checks if phone app requested wear permission (permission request opens later if true).
        mPhoneRequestingWearSensorPermission =
                getIntent().getBooleanExtra(EXTRA_PROMPT_PERMISSION_FROM_PHONE, false);

        mWearBodySensorsPermissionButton =
                (Button) findViewById(R.id.wear_body_sensors_permission_button);

        if (mWearBodySensorsPermissionApproved) {
            mWearBodySensorsPermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                    R.drawable.ic_permission_approved, 0, 0, 0);
        }

        mPhoneStoragePermissionButton = (Button) findViewById(R.id.phone_storage_permission_button);

        mOutputTextView = (TextView) findViewById(R.id.output);

        if (mPhoneRequestingWearSensorPermission) {
            launchPermissionDialogForPhone();
        }


        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(Wearable.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();
    }

    public void onClickWearBodySensors(View view) {

        if (mWearBodySensorsPermissionApproved) {

            // To keep the sample simple, we are only displaying the number of sensors.
            SensorManager sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
            List<Sensor> sensorList = sensorManager.getSensorList(Sensor.TYPE_ALL);
            int numberOfSensorsOnDevice = sensorList.size();

            logToUi(numberOfSensorsOnDevice + " sensors on device(s)!");

        } else {
            logToUi("Requested local permission.");
            // On 23+ (M+) devices, GPS permission not granted. Request permission.
            ActivityCompat.requestPermissions(
                    this,
                    new String[]{Manifest.permission.BODY_SENSORS},
                    PERMISSION_REQUEST_READ_BODY_SENSORS);
        }
    }

    public void onClickPhoneStorage(View view) {

        logToUi("Requested info from phone. New approval may be required.");
        DataMap dataMap = new DataMap();
        dataMap.putInt(Constants.KEY_COMM_TYPE,
                Constants.COMM_TYPE_REQUEST_DATA);
        sendMessage(dataMap);
    }

    @Override
    protected void onPause() {
        Log.d(TAG, "onPause()");
        super.onPause();
        if ((mGoogleApiClient != null) && mGoogleApiClient.isConnected()) {
            Wearable.CapabilityApi.removeCapabilityListener(
                    mGoogleApiClient,
                    this,
                    Constants.CAPABILITY_PHONE_APP);
            Wearable.MessageApi.removeListener(mGoogleApiClient, this);
            mGoogleApiClient.disconnect();
        }
    }

    @Override
    protected void onResume() {
        Log.d(TAG, "onResume()");
        super.onResume();
        if (mGoogleApiClient != null) {
            mGoogleApiClient.connect();
        }

        // Enables app to handle 23+ (M+) style permissions.
        mWearBodySensorsPermissionApproved =
                ActivityCompat.checkSelfPermission(this, Manifest.permission.BODY_SENSORS)
                        == PackageManager.PERMISSION_GRANTED;
    }

     /*
      * Because this wear activity is marked "android:launchMode='singleInstance'" in the manifest,
      * we need to allow the permissions dialog to be opened up from the phone even if the wear app
      * is in the foreground. By overriding onNewIntent, we can cover that use case.
      */
    @Override
    protected void onNewIntent (Intent intent) {
        Log.d(TAG, "onNewIntent()");
        super.onNewIntent(intent);

        // Checks if phone app requested wear permissions (opens up permission request if true).
        mPhoneRequestingWearSensorPermission =
                intent.getBooleanExtra(EXTRA_PROMPT_PERMISSION_FROM_PHONE, false);

        if (mPhoneRequestingWearSensorPermission) {
            launchPermissionDialogForPhone();
        }
    }

    @Override
    public void onEnterAmbient(Bundle ambientDetails) {
        Log.d(TAG, "onEnterAmbient() " + ambientDetails);

        if (mWearBodySensorsPermissionApproved) {
            mWearBodySensorsPermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                    R.drawable.ic_permission_approved_bw, 0, 0, 0);
        } else {
            mWearBodySensorsPermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                    R.drawable.ic_permission_denied_bw, 0, 0, 0);
        }

        if (mPhoneStoragePermissionApproved) {
            mPhoneStoragePermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                    R.drawable.ic_permission_approved_bw, 0, 0, 0);
        } else {
            mPhoneStoragePermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                    R.drawable.ic_permission_denied_bw, 0, 0, 0);
        }
        super.onEnterAmbient(ambientDetails);
    }

    @Override
    public void onExitAmbient() {
        Log.d(TAG, "onExitAmbient()");

        if (mWearBodySensorsPermissionApproved) {
            mWearBodySensorsPermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                    R.drawable.ic_permission_approved, 0, 0, 0);
        } else {
            mWearBodySensorsPermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                    R.drawable.ic_permission_denied, 0, 0, 0);
        }

        if (mPhoneStoragePermissionApproved) {
            mPhoneStoragePermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                    R.drawable.ic_permission_approved, 0, 0, 0);
        } else {
            mPhoneStoragePermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                    R.drawable.ic_permission_denied, 0, 0, 0);
        }
        super.onExitAmbient();
    }

    @Override
    public void onConnected(Bundle bundle) {
        Log.d(TAG, "onConnected()");

        // Set up listeners for capability and message changes.
        Wearable.CapabilityApi.addCapabilityListener(
                mGoogleApiClient,
                this,
                Constants.CAPABILITY_PHONE_APP);
        Wearable.MessageApi.addListener(mGoogleApiClient, this);

        // Initial check of capabilities to find the phone.
        PendingResult<CapabilityApi.GetCapabilityResult> pendingResult =
                Wearable.CapabilityApi.getCapability(
                        mGoogleApiClient,
                        Constants.CAPABILITY_PHONE_APP,
                        CapabilityApi.FILTER_REACHABLE);

        pendingResult.setResultCallback(new ResultCallback<CapabilityApi.GetCapabilityResult>() {
            @Override
            public void onResult(CapabilityApi.GetCapabilityResult getCapabilityResult) {

                if (getCapabilityResult.getStatus().isSuccess()) {
                    CapabilityInfo capabilityInfo = getCapabilityResult.getCapability();
                    mPhoneNodeId = pickBestNodeId(capabilityInfo.getNodes());

                } else {
                    Log.d(TAG, "Failed CapabilityApi result: "
                            + getCapabilityResult.getStatus());
                }
            }
        });
    }

    @Override
    public void onConnectionSuspended(int i) {
        Log.d(TAG, "onConnectionSuspended(): connection to location client suspended");
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        Log.e(TAG, "onConnectionFailed(): connection to location client failed");
    }

    public void onCapabilityChanged(CapabilityInfo capabilityInfo) {
        Log.d(TAG, "onCapabilityChanged(): " + capabilityInfo);

        mPhoneNodeId = pickBestNodeId(capabilityInfo.getNodes());
    }

    /*
     * Callback received when a permissions request has been completed.
     */
    @Override
    public void onRequestPermissionsResult(
            int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

        String permissionResult = "Request code: " + requestCode + ", Permissions: " + permissions
                + ", Results: " + grantResults;
        Log.d(TAG, "onRequestPermissionsResult(): " + permissionResult);


        if (requestCode == PERMISSION_REQUEST_READ_BODY_SENSORS) {

            if ((grantResults.length == 1)
                    && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) {

                mWearBodySensorsPermissionApproved = true;
                mWearBodySensorsPermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                        R.drawable.ic_permission_approved, 0, 0, 0);

                // To keep the sample simple, we are only displaying the number of sensors.
                SensorManager sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
                List<Sensor> sensorList = sensorManager.getSensorList(Sensor.TYPE_ALL);
                int numberOfSensorsOnDevice = sensorList.size();

                String sensorSummary = numberOfSensorsOnDevice + " sensors on this device!";
                logToUi(sensorSummary);

                if (mPhoneRequestingWearSensorPermission) {
                    // Resets so this isn't triggered every time permission is changed in app.
                    mPhoneRequestingWearSensorPermission = false;

                    // Send 'approved' message to remote phone since it started Activity.
                    DataMap dataMap = new DataMap();
                    dataMap.putInt(Constants.KEY_COMM_TYPE,
                            Constants.COMM_TYPE_RESPONSE_USER_APPROVED_PERMISSION);
                    sendMessage(dataMap);
                }

            } else {

                mWearBodySensorsPermissionApproved = false;
                mWearBodySensorsPermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                        R.drawable.ic_permission_denied, 0, 0, 0);

                if (mPhoneRequestingWearSensorPermission) {
                    // Resets so this isn't triggered every time permission is changed in app.
                    mPhoneRequestingWearSensorPermission = false;
                    // Send 'denied' message to remote phone since it started Activity.
                    DataMap dataMap = new DataMap();
                    dataMap.putInt(Constants.KEY_COMM_TYPE,
                            Constants.COMM_TYPE_RESPONSE_USER_DENIED_PERMISSION);
                    sendMessage(dataMap);
                }
            }
        }
    }

    public void onMessageReceived(MessageEvent messageEvent) {
        Log.d(TAG, "onMessageReceived(): " + messageEvent);

        String messagePath = messageEvent.getPath();

        if (messagePath.equals(Constants.MESSAGE_PATH_WEAR)) {

            DataMap dataMap = DataMap.fromByteArray(messageEvent.getData());
            int commType = dataMap.getInt(Constants.KEY_COMM_TYPE, 0);

            if (commType == Constants.COMM_TYPE_RESPONSE_PERMISSION_REQUIRED) {
                mPhoneStoragePermissionApproved = false;
                updatePhoneButtonOnUiThread();

                /* Because our request for remote data requires a remote permission, we now launch
                 * a splash activity informing the user we need those permissions (along with
                 * other helpful information to approve).
                 */
                Intent phonePermissionRationaleIntent =
                        new Intent(this, RequestPermissionOnPhoneActivity.class);
                startActivityForResult(phonePermissionRationaleIntent, REQUEST_PHONE_PERMISSION);

            } else if (commType == Constants.COMM_TYPE_RESPONSE_USER_APPROVED_PERMISSION) {
                mPhoneStoragePermissionApproved = true;
                updatePhoneButtonOnUiThread();
                logToUi("User approved permission on remote device, requesting data again.");
                DataMap outgoingDataRequestDataMap = new DataMap();
                outgoingDataRequestDataMap.putInt(Constants.KEY_COMM_TYPE,
                        Constants.COMM_TYPE_REQUEST_DATA);
                sendMessage(outgoingDataRequestDataMap);

            } else if (commType == Constants.COMM_TYPE_RESPONSE_USER_DENIED_PERMISSION) {
                mPhoneStoragePermissionApproved = false;
                updatePhoneButtonOnUiThread();
                logToUi("User denied permission on remote device.");

            } else if (commType == Constants.COMM_TYPE_RESPONSE_DATA) {
                mPhoneStoragePermissionApproved = true;
                String storageDetails = dataMap.getString(Constants.KEY_PAYLOAD);
                updatePhoneButtonOnUiThread();
                logToUi(storageDetails);
            }
        }
    }

    private void sendMessage(DataMap dataMap) {
        Log.d(TAG, "sendMessage(): " + mPhoneNodeId);

        if (mPhoneNodeId != null) {

            PendingResult<MessageApi.SendMessageResult> pendingResult =
                    Wearable.MessageApi.sendMessage(
                            mGoogleApiClient,
                            mPhoneNodeId,
                            Constants.MESSAGE_PATH_PHONE,
                            dataMap.toByteArray());

            pendingResult.setResultCallback(new ResultCallback<MessageApi.SendMessageResult>() {
                @Override
                public void onResult(MessageApi.SendMessageResult sendMessageResult) {

                    if (!sendMessageResult.getStatus().isSuccess()) {
                        updatePhoneButtonOnUiThread();
                        logToUi("Sending message failed.");

                    } else {
                        Log.d(TAG, "Message sent successfully.");
                    }
                }
            }, Constants.CONNECTION_TIME_OUT_MS, TimeUnit.SECONDS);

        } else {
            // Unable to retrieve node with proper capability
            mPhoneStoragePermissionApproved = false;
            updatePhoneButtonOnUiThread();
            logToUi("Phone not available to send message.");
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // Check which request we're responding to
        if (requestCode == REQUEST_PHONE_PERMISSION) {
            // Make sure the request was successful
            if (resultCode == RESULT_OK) {
                logToUi("Requested permission on phone.");
                DataMap dataMap = new DataMap();
                dataMap.putInt(Constants.KEY_COMM_TYPE,
                        Constants.COMM_TYPE_REQUEST_PROMPT_PERMISSION);
                sendMessage(dataMap);
            }
        }
    }

    /*
     * There should only ever be one phone in a node set (much less w/ the correct capability), so
     * I am just grabbing the first one (which should be the only one).
     */
    private String pickBestNodeId(Set<Node> nodes) {

        String bestNodeId = null;
        // Find a nearby node or pick one arbitrarily.
        for (Node node : nodes) {
            if (node.isNearby()) {
                return node.getId();
            }
            bestNodeId = node.getId();
        }
        return bestNodeId;
    }

    /*
     * If Phone triggered the wear app for permissions, we open up the permission
     * dialog after inflation.
     */
    private void launchPermissionDialogForPhone() {
        Log.d(TAG, "launchPermissionDialogForPhone()");

        if (!mWearBodySensorsPermissionApproved) {
            // On 23+ (M+) devices, GPS permission not granted. Request permission.
            ActivityCompat.requestPermissions(
                    MainWearActivity.this,
                    new String[]{Manifest.permission.BODY_SENSORS},
                    PERMISSION_REQUEST_READ_BODY_SENSORS);
        }
    }

    private void updatePhoneButtonOnUiThread() {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {

                if (mPhoneStoragePermissionApproved) {

                    if (isAmbient()) {
                        mPhoneStoragePermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                                R.drawable.ic_permission_approved_bw, 0, 0, 0);
                    } else {
                        mPhoneStoragePermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                                R.drawable.ic_permission_approved, 0, 0, 0);
                    }

                } else {

                    if (isAmbient()) {
                        mPhoneStoragePermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                                R.drawable.ic_permission_denied_bw, 0, 0, 0);
                    } else {
                        mPhoneStoragePermissionButton.setCompoundDrawablesWithIntrinsicBounds(
                                R.drawable.ic_permission_denied, 0, 0, 0);
                    }
                }
            }
        });
    }

    /*
     * Handles all messages for the UI coming on and off the main thread. Not all callbacks happen
     * on the main thread.
     */
    private void logToUi(final String message) {

        boolean mainUiThread = (Looper.myLooper() == Looper.getMainLooper());

        if (mainUiThread) {

            if (!message.isEmpty()) {
                Log.d(TAG, message);
                mOutputTextView.setText(message);
            }

        } else {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    if (!message.isEmpty()) {
                        Log.d(TAG, message);
                        mOutputTextView.setText(message);
                    }
                }
            });
        }
    }
}