为什么 RatingBarChangeListner 上的评分栏不起作用？

Question

我正在尝试在我的代码中添加rating bar。我正在使用onRatingBarChangeListner 来获取评分栏的值。但是rating bar 根本没有回应。它不会被选中或改变颜色。

public class SurveyActivity extends AppCompatActivity implements getQuestionsAsyncTask.GetQuestions,RatingBar.OnRatingBarChangeListener{

private ArrayList<Question> mQuestionsArrayList;
private TextView mTextQuestion1,mTextQuestion2;
private RatingBar ratingbar1;


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

 //   addListenerOnButtonClick();

    mTextQuestion1 = (TextView)findViewById(R.id.textQuestion1);
    mTextQuestion2 = (TextView)findViewById(R.id.textQuestion2);

    Button next = (Button)findViewById(R.id.btn_next);

    final RatingBar ratingBar = (RatingBar)findViewById(R.id.MyRating);

   next.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            float rating=ratingBar.getRating();
            Toast.makeText(getApplicationContext(),"Your Selected Ratings  : " + String.valueOf(rating),Toast.LENGTH_LONG).show();

         //   startActivity(new Intent(SurveyActivity.this,UserDetailsActivity.class));
        }
    });



    mQuestionsArrayList = new ArrayList<>();

    getQuestionsAsyncTask getQuestionsAsyncTask = new getQuestionsAsyncTask(this,this,mQuestionsArrayList);
    getQuestionsAsyncTask.execute();
}
public void onRatingChanged(RatingBar ratingBar, float rating,
                            boolean fromUser) {

    Toast.makeText(getApplicationContext(),"Your Selected Ratings  : " + String.valueOf(rating),Toast.LENGTH_LONG).show();

}

试过了，但没用。

    <RatingBar
        android:id="@+id/MyRating"
        style="?android:attr/ratingBarStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:isIndicator="true"
        android:numStars="5"
        android:stepSize="0.1"
        android:layout_above="@+id/textQuestion2"
        android:layout_alignParentEnd="true"
        android:layout_marginLeft="10dp"
        android:layout_marginStart="10dp"
        android:layout_alignParentRight="true" />

也试过这个tutorial

怎么了？有人可以帮忙吗？谢谢。。

编辑：两个答案都试过了还是不行：

public class SurveyActivity extends AppCompatActivity implements getQuestionsAsyncTask.GetQuestions,RatingBar.OnRatingBarChangeListener{

    private ArrayList<Question> mQuestionsArrayList;
    private TextView mTextQuestion1,mTextQuestion2;
    private RatingBar ratingbar1;


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

        Button next = (Button)findViewById(R.id.btn_next);

        final RatingBar ratingBar = (RatingBar)findViewById(R.id.MyRating);
        ratingBar.setOnRatingBarChangeListener(this);


       next.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                float rating=ratingBar.getRating();
                Toast.makeText(getApplicationContext(),"Your Selected Ratings  : " + String.valueOf(rating),Toast.LENGTH_LONG).show();

            }
        });
    }
    @Override
    public void onRatingChanged(RatingBar ratingBar, float v, boolean b) {

            v = ratingBar.getRating();

            Toast.makeText(getApplicationContext(), "Your Selected Ratings  : " + String.valueOf(v), Toast.LENGTH_LONG).show();

    }

Answer 1

您的onRatingChanged 应如下所示

@Override
public void onRatingChanged(RatingBar ratingBar, float v, boolean b) {

}

在您的ratingBar 上添加setOnRatingBarChangeListener

ratingBar.setOnRatingBarChangeListener(this);

编辑 1：对于 Toast，请尝试以下操作

String rating=String.valueOf(ratingBar.getRating());  
Toast.makeText(getApplicationContext(), rating, Toast.LENGTH_LONG).show();  

编辑 2：由于isIndicator 属性，您无法更改评级。根据android的文档

android:isIndicator 此评分栏是否为指示器（以及 用户不可更改）。

所以删除该属性并将您的ratingBar 更改为关注

<RatingBar
        android:id="@+id/MyRating"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:numStars="5"
        android:stepSize="0.1"
        android:layout_above="@+id/textQuestion2"
        android:layout_alignParentEnd="true"
        android:layout_marginLeft="10dp"
        android:layout_marginStart="10dp"
        android:layout_alignParentRight="true" />

也是为什么我删除了行

style="?android:attr/ratingBarStyleSmall"

参考this

Answer 2

您忘记在 ratingBar 视图上设置 Change 侦听器，

final RatingBar ratingBar = (RatingBar)findViewById(R.id.MyRating);
ratingBar.setOnRatingBarChangeListener(this);