Android Rating Bar无法设置十进制值

Question

I am trying to set the rating bar's inital rating to a float value. But the output is always completely filled stars! I have no idea why this is happening.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    ratingText = (TextView) findViewById(R.id.rating);
    ratingBar = ((RatingBar) findViewById(R.id.ratingBar1));
    ratingBar.setRating(Float.parseFloat("3.5"));
    ((RatingBar) findViewById(R.id.ratingBar1))
            .setOnRatingBarChangeListener(this);

}

This is the rating bar:

<RatingBar
    android:id="@+id/ratingBar1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:stepSize="0.5"
    android:layout_marginLeft="22dp"
    android:layout_marginTop="28dp" />

Answer 1

You are setting the stepSize="0.5". You should change it to 0.1.

Answer 2

Try to do it by programattically like this

ratingBar = ((RatingBar) findViewById(R.id.ratingBar1));
ratingBar.setStepSize(0.5f);
ratingBar.ratingBar.setNumStars(5);
ratingBar.ratingBar.setMax(5);
ratingBar.setRating(Float.parseFloat("3.5"));

Answer 3

You just remove the toolbar in your project. I think there is some issue in toolbar. I tried as follows, it works

ratingBar = ((RatingBar) findViewById(R.id.ratingBar1));
    ratingBar.setRating(Float.parseFloat("3.6"));
    ratingBar = ((RatingBar) findViewById(R.id.ratingBar1));