RatingBar星級評分條
它跟拖動條類似。都允許用戶拖動來改變進度,不同的是,星級評分條通過星星圖案表示進度。想淘寶,等等都有這個東西。很簡單。
重要記一個組件<RatingBar 屬性列表></RatingBar>,屬性見名知意
還有三個方法:
1、getRating()方法:獲取等級,表示你當前選中了幾顆星星
2、getStepSize()方法:每次最少可以改變多少星星(默認是0.5個)
3、getProgress()方法:獲取進度,是前兩個之積。
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
tools:context="com.amy.ratingbartest.MainActivity">
<LinearLayout
android:orientation="vertical"
android:layout_width="0dp"
android:layout_height="wrap_content"
tools:layout_editor_absoluteY="0dp"
tools:layout_editor_absoluteX="8dp">
<!-- 星級評分條 -->
<RatingBar
android:id="@+id/ratingBar1"
android:numStars="5"
android:rating="2.5"
android:isIndicator="false"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- 按鈕 -->
<Button
android:id="@+id/button1"
android:text="提交"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>
MainActivity.java
package com.amy.ratingbartest;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.RatingBar;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private RatingBar ratingBar;//星級評分條
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ratingBar = (RatingBar) findViewById(R.id.ratingBar1);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
/**
* getRating():用於獲取等級,表示選中的幾顆星
* getStepSize():用語獲取每次至少要改變多少個星級
* getProgress():用語獲取進度,獲取到的進度值爲getRating()方法返回值與getStepSize()方法返回值之積
*/
int result = ratingBar.getProgress();
float rating = ratingBar.getRating();
float step = ratingBar.getStepSize();
Log.e("星級評分條","step="+step+"result="+result+"rating="+rating);
Toast.makeText(MainActivity.this,"你得到了"+rating+"顆星",Toast.LENGTH_SHORT).show();
}
});
}
}