【移動(dòng)應(yīng)用開(kāi)發(fā)技術(shù)】評(píng)分條RatingBar

【移動(dòng)應(yīng)用開(kāi)發(fā)技術(shù)】評(píng)分條RatingBar

RatingBar是基于SeekBar和ProgressBar的擴(kuò)展，用星型來(lái)顯示等級(jí)評(píng)定。使用RatingBar的默認(rèn)大小時(shí)，用戶(hù)可以觸摸/拖動(dòng)或使用鍵來(lái)設(shè)置評(píng)分，它有兩種樣式(小風(fēng)格用ratingBarStyleSmall，大風(fēng)格用ratingBarStyleIndicator)，其中大的只適合指示，不適合于用戶(hù)交互。主要用于評(píng)分。一、設(shè)計(jì)界面1、打開(kāi)“res/layout/activity_main.xml”文件。從工具欄向activity拖出1個(gè)評(píng)分條RatingBar。2、打開(kāi)activity_main.xml文件。代碼如下：<LinearLayout

xmlns:android="/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical"

>

<RatingBar

android:id="@+id/ratingbar"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

/>

</LinearLayout>二、程序文件

打開(kāi)“src/com.genwoxue.ratingbar/MainActivity.java”文件。然后輸入以下代碼：import

android.app.Activity;

import

android.os.Bundle;

import

android.widget.RatingBar;

import

android.widget.Toast;

public

class

MainActivity

extends

Activity

{

//聲明RatingBar

private

RatingBar

rbScore

=

null;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

//獲取RatingBar

rbScore

=

(RatingBar)

findViewById(R.id.ratingbar);

//設(shè)置監(jiān)聽(tīng)事件

rbScore.setOnRatingBarChangeListener(new

RatingBar.OnRatingBarChangeListener()

{

@Override

public

void

onRatingChanged(RatingBar

ratingBar,

float

rating,

boolean

fromUser)

{

Toast.makeText(getApplication(),

"rating:"+String.valueOf(rating),

Toast.LENGTH_LONG).show();

}

});

}

}說(shuō)明：RatingBar監(jiān)聽(tīng)事件。

public

void

setOnRatingBarChangeList