Question

我收到分配给int的json服务器响应。我正在使用putExtra（也尝试共享首选项）将此int传递给下一个活动。当我加载下一个活动时，int不会第一次显示在屏幕上。我必须按下后退按钮，然后再次加载活动以显示int值。我无法弄清楚为什么该值第一次没有正确通过，为什么在第二次重载时它成功通过了。我完全不知所措，我想它要么成功要么失败，否则第一次将失败，并且每次都会传递一次重载。

第一个活动进行插入并捕获行ID，将行ID传递给第二个活动，第二个活动用于使用传递的行ID进行更新。

请参阅代码段获取上下文。

带补液呼叫的第一项活动：

case R.id.nextBtnMoodPage:
            if (hasSelected) {

                moodPreferences();
                backgroundSelector();

                Call<ReadCbtId> call = RetrofitClient
                        .getInstance()
                        .getApi()
                        .insertLog(userId, therapistId, moodBefore, automaticThoughtString, distortions, challengeThoughtString, alternativeThoughtString, moodAfter, posted);

                call.enqueue(new Callback<ReadCbtId>() {
                    @Override
                    public void onResponse(Call<ReadCbtId> call, Response<ReadCbtId> response) {

                        cbtId = response.body().getCbtId();
                        Toast.makeText(getContext(),String.valueOf(cbtId), Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onFailure(Call<ReadCbtId> call, Throwable t) {
                        Toast.makeText(getContext(), t.getMessage(), Toast.LENGTH_LONG).show();
                    }
                });

                //editorWorkout.putInt("cbtId", cbtId);
                //editorWorkout.commit();
                Intent intent = new Intent(getActivity(), WorkoutAutomaticThoughtActivity.class);
                intent.putExtra("cbtId", cbtId);
                startActivity(intent);

            }

第二活动：

 /**
 * Ints which are used to store numeric values related to the workout activity.
 */
private int userId, therapistId, cbtId;

private TextView title;

/**
 * @param savedInstanceState
 */
@SuppressLint("ResourceType")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_workout_automatic_thought);

    Bundle extras = getIntent().getExtras();
    cbtId = extras.getInt("cbtId");

    getSharedPreferences();
    moodPreferences();
    backgroundSelector();
    initialiseViews();
    setListeners();
}

/**
 * Method which gets the users shared preferences. loginPref stores the users ID and workoutPref stores the users mood
 * which they selected at the beginning of the Workout Activity.
 */
private void getSharedPreferences() {

    // Shared preferences track which mood the user selected
    loginPref = getSharedPreferences("loginPref", Context.MODE_PRIVATE);
    workoutPref = getSharedPreferences("workoutPref", Context.MODE_PRIVATE);

    // Users login preferences logged from the login activity.
    userId = loginPref.getInt("userId", 0);
    therapistId = loginPref.getInt("therapistId", 0);
   // cbtId = workoutPref.getInt("cbtId", 0);
}

/**
 *
 */
private void initialiseViews() {

    // Initialising editText form the xml file
    automaticThoughtET = findViewById(R.id.automaticThoughtInput);

    // Initialising the nextButton form the xml file
    nextButton = findViewById(R.id.DistortedNextBtn);

    title = findViewById(R.id.automaticThoughtTitle);
    title.setText("Test" + cbtId);

}


 private void setListeners() {
    // Setting an onClick listener to the nextButton
    nextButton.setOnClickListener(new View.OnClickListener() {

        /**
         * Method which opens a new activity when the next nextButton is clicked. This method also passed variables through
         * to the next activity as a string.
         * @param v
         */
        @Override
        public void onClick(View v) {

            if (!validateText()) {
                return;
            }

            Call<ResponseBody> call = RetrofitClient
                    .getInstance()
                    .getApi()
                    .updateAutomaticThought(cbtId, automaticThoughtString);

            call.enqueue(new Callback<ResponseBody>() {
                @Override
                public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {

                }

                @Override
                public void onFailure(Call<ResponseBody> call, Throwable t) {

                }
            });
            //  Creating a new intent to move from the WorkoutAutomaticThoughtActivity to the WorkoutDistortedThoughtsActivity
            Intent intent = new Intent(WorkoutAutomaticThoughtActivity.this, WorkoutDistortedThoughtsActivity.class);

          /*  // Passing variables as Strings to the next activity
            automaticThoughtString = automaticThoughtET.getText().toString();
            intent.putExtra("AthoughtKey", automaticThoughtString);*/
            startActivity(intent);
            finish();
        }
    });

Answer 1

在获得结果之前，您正在调用下一个活动。

Intent intent = new Intent(getActivity(), WorkoutAutomaticThoughtActivity.class);
intent.putExtra("cbtId", cbtId);
startActivity(intent);

此代码应在

内部调用

 @Override
 public void onResponse(Call<ReadCbtId> call, Response<ReadCbtId> response) {
    cbtId = response.body().getCbtId();
    Toast.makeText(getContext(),String.valueOf(cbtId), Toast.LENGTH_SHORT).show();
}

所以它看起来像这样：

@Override
public void onResponse(Call<ReadCbtId> call, Response<ReadCbtId> response) {
    Intent intent = new Intent(getActivity(), WorkoutAutomaticThoughtActivity.class);
    intent.putExtra("cbtId", response.body().getCbtId());

    Toast.makeText(getContext(),String.valueOf(response.body().getCbtId()), Toast.LENGTH_SHORT).show();

    startActivity(intent);

}

将改造响应传递给其他活动

1 个答案: