文章目录
####1、功能介绍
选星星打分
####2、代码架构
####3、布局文件 activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.lum.seekbar.MainActivity">
<TextView
android:id="@+id/text_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="请选择"
android:textSize="30dp" />
<RatingBar
android:id="@+id/ratingBar_id"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:numStars="5"
android:layout_marginTop="30dp"
android:stepSize="0.5"/> <!--设置为 1 则可以一次选择整个-->
</LinearLayout>
####4、功能代码 MainActivity.java
package com.example.lum.seekbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.RatingBar;
import android.widget.SeekBar;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity implements RatingBar.OnRatingBarChangeListener {
private TextView textView;
private RatingBar ratingBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.text_id);
ratingBar = (RatingBar) findViewById(R.id.ratingBar_id);
ratingBar.setOnRatingBarChangeListener(this); //ratingBar 监听
}
@Override
public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
textView.setText("你的打分是:" + (float) ratingBar.getRating() + "分");
}
}