无法解析 GOOGLE_FIT_PERMISSIONS_REQUEST_CODE

Question

我在 Android Studio 中使用 Google Fit API 并且我正在关注本教程，但发生错误，说：

无法解析符号。

我已经为此寻找了解决方案，但找不到。

如他们的网站所述，我还将依赖项放在了我的模块 gradle 上。

GOOGLE_FIT_PERMISSIONS_REQUEST_CODE

这是我从上面提到的链接中复制的代码：

  public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        FitnessOptions fitnessOptions = FitnessOptions.builder()
                .addDataType(DataType.TYPE_STEP_COUNT_DELTA, FitnessOptions.ACCESS_READ)
                .addDataType(DataType.AGGREGATE_STEP_COUNT_DELTA, FitnessOptions.ACCESS_READ)
                .build();
        if (!GoogleSignIn.hasPermissions(GoogleSignIn.getLastSignedInAccount(this), fitnessOptions)) {
            GoogleSignIn.requestPermissions(this,  GOOGLE_FIT_PERMISSIONS_REQUEST_CODE, GoogleSignIn.getLastSignedInAccount(this), fitnessOptions);
        } else {

            accessGoogleFit();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        if (resultCode == Activity.RESULT_OK) {
            if (requestCode ==  GOOGLE_FIT_PERMISSIONS_REQUEST_CODE) {
                accessGoogleFit();
            }
        }
    }
    private void accessGoogleFit() {
        final  String LOG_TAG="i am here";
        Calendar cal = Calendar.getInstance();
        cal.setTime(new Date());
        long endTime = cal.getTimeInMillis();
        cal.add(Calendar.YEAR, -1);
        long startTime = cal.getTimeInMillis();

        DataReadRequest readRequest = new DataReadRequest.Builder()
                .aggregate(DataType.TYPE_STEP_COUNT_DELTA, DataType.AGGREGATE_STEP_COUNT_DELTA)
                .setTimeRange(startTime, endTime, TimeUnit.MILLISECONDS)
                .build();


        Fitness.getHistoryClient(this, GoogleSignIn.getLastSignedInAccount(this))
                .readData(readRequest)
                .addOnSuccessListener(new OnSuccessListener() {
                    @Override
                    public void onSuccess(Object o) {
                        Log.d(LOG_TAG, "onSuccess()");
                    }


                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        Log.e(LOG_TAG, "onFailure()", e);
                    }
                })
                .addOnCompleteListener(new OnCompleteListener() {
                    @Override
                    public void onComplete(@NonNull Task task) {
                        Log.d(LOG_TAG, "onComplete()");
                    }
                });
    }
}

Answer 1

你还没有定义。

public class MainActivity extends AppCompatActivity {
  int GOOGLE_FIT_PERMISSIONS_REQUEST_CODE = 123456; //whatever you want
  // rest of the code
}