How to Access Google Fit REST API in Android Apps

Integrate Google Fit API

• Start by adding the Google Fit API dependency in your `build.gradle` file. Use the following dependency for your `app` module: ``` dependencies { implementation 'com.google.android.gms:play-services-fitness:21.0.1' } ```

 

• Sync your project with Gradle files by clicking on "Sync Now" in the notification bar at the top or going to `File -> Sync Project with Gradle Files`.

Request Permissions

• Google Fit requires explicit user permission to access fitness data. Define permission constants that your app will use to access data: ``` import com.google.android.gms.fitness.data.DataType; import com.google.android.gms.fitness.data.Scopes;

  Set fitnessOptions = FitnessOptions.builder()
  .addDataType(DataType.TYPE_STEP_COUNT_CUMULATIVE, FitnessOptions.ACCESS_READ)
  .addDataType(DataType.TYPE_STEP_COUNT_DELTA, FitnessOptions.ACCESS_READ)
  .build();

  </li>
  
  &nbsp;
  
  <li>Use the GoogleSignIn API to request permissions from the user. Check if the user already has granted permissions:
  

  GoogleSignInAccount account = GoogleSignIn.getAccountForExtension(this, fitnessOptions);

  if (!GoogleSignIn.hasPermissions(account, fitnessOptions)) {
  GoogleSignIn.requestPermissions(
  this,
  REQUEST_OAUTH_REQUEST_CODE,
  account,
  fitnessOptions);
  } else {
  accessGoogleFitData();
  }

  </li>
  
  </ul>
  
  &nbsp;
  
  <b>Access Data from Google Fit</b>
  
  &nbsp;
  
  <ul>
  
  <li>Once permissions are granted, you can use the `HistoryClient` to access fitness data. Here's an example of how to read the daily step count data:
  

  private void accessGoogleFitData() {
  GoogleSignInAccount account = GoogleSignIn.getAccountForExtension(this, fitnessOptions);

  Fitness.getHistoryClient(this, account)
      .readDailyTotal(DataType.TYPE_STEP_COUNT_DELTA)
      .addOnSuccessListener(response -> {
          long totalSteps = response.isEmpty()
              ? 0
              : response.getDataPoints().get(0).getValue(Field.FIELD_STEPS).asInt();
          Log.i(TAG, "Total steps: " + totalSteps);
      })
      .addOnFailureListener(e -> Log.w(TAG, "There was an error reading data from Google Fit", e));
  

  }

  </li>
  
  &nbsp;
  
  <li>Make sure to handle cases where there is no step data returned or when there is an error in accessing the data.</li>
  
  </ul>
  
  &nbsp;
  
  <b>Handling User Authentication Response</b>
  
  &nbsp;
  
  <ul>
  
  <li>Handle the result of the authentication request in your `onActivityResult` method:
  

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

  if (requestCode == REQUEST_OAUTH_REQUEST_CODE) {
      if (resultCode == RESULT_OK) {
          accessGoogleFitData();
      } else {
          Log.e(TAG, "User denied fitness access");
      }
  }
  

  }

  </li>
  
  </ul>
  
  &nbsp;
  
  <b>Optimize for Best Practices</b>
  
  &nbsp;
  
  <ul>
  
  <li>Ensure that you handle user opt-out scenarios gracefully. Prompt users with clear rationale and a detailed explanation of why accessing their fitness data will enhance their experience.</li>
  
  &nbsp;
  
  <li>Instead of constantly reading from Google Fit, cache results locally and update periodically to save battery life and network bandwidth.</li>
  
  </ul>
  
  &nbsp;