編輯:Android開發實例
RatingBar是Adnroid中的評分條。效果挺得的
源碼下載
一、概述
RatingBar是SeekBar和ProgressBar的擴展,用星星來評級。使用的默認大小RatingBar時,用戶可以觸摸/拖動或使用鍵來設置評分,它有倆種樣式(大、小),其中大的只適合指示,不適合於用戶交互。
二、實例
1.布局文件
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:paddingLeft="10dip"
- android:layout_width="match_parent"
- android:layout_height="match_parent">
- <RatingBar android:id="@+id/ratingbar1"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:numStars="3"
- android:rating="2.5" />
- <RatingBar android:id="@+id/ratingbar2"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:numStars="5"
- android:rating="2.25" />
- <LinearLayout
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:layout_marginTop="10dip">
- <TextView android:id="@+id/rating"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content" />
- <RatingBar android:id="@+id/small_ratingbar"
- style="?android:attr/ratingBarStyleSmall"
- android:layout_marginLeft="5dip"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_gravity="center_vertical" />
- </LinearLayout>
- <RatingBar android:id="@+id/indicator_ratingbar"
- style="?android:attr/ratingBarStyleIndicator"
- android:layout_marginLeft="5dip"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_gravity="center_vertical" />
- </LinearLayout>
2.Java代碼
- package wjq.WidgetDemo;
- import android.app.Activity;
- import android.os.Bundle;
- import android.widget.RatingBar;
- import android.widget.TextView;
- import android.widget.RatingBar.OnRatingBarChangeListener;
- public class RatingBarDemo extends Activity implements
- OnRatingBarChangeListener {
- private RatingBar mSmallRatingBar;
- private RatingBar mIndicatorRatingBar;
- private TextView mRatingText;
- /*
- * (non-Javadoc)
- *
- * @see android.app.Activity#onCreate(android.os.Bundle)
- */
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- // TODO Auto-generated method stub
- super.onCreate(savedInstanceState);
- setContentView(R.layout.ratingbarpage);
- mRatingText = (TextView) findViewById(R.id.rating);
- // We copy the most recently changed rating on to these indicator-only
- // rating bars
- mIndicatorRatingBar = (RatingBar) findViewById(R.id.indicator_ratingbar);
- mSmallRatingBar = (RatingBar) findViewById(R.id.small_ratingbar);
- // The different rating bars in the layout. Assign the listener to us.
- ((RatingBar)findViewById(R.id.ratingbar1)).setOnRatingBarChangeListener(this);
- ((RatingBar)findViewById(R.id.ratingbar2)).setOnRatingBarChangeListener(this);
- }
- @Override
- public void onRatingChanged(RatingBar ratingBar, float rating,
- boolean fromUser) {
- final int numStars = ratingBar.getNumStars();
- mRatingText.setText(
- " 受歡迎度" + rating + "/" + numStars);
- // Since this rating bar is updated to reflect any of the other rating
- // bars, we should update it to the current values.
- if (mIndicatorRatingBar.getNumStars() != numStars) {
- mIndicatorRatingBar.setNumStars(numStars);
- mSmallRatingBar.setNumStars(numStars);
- }
- if (mIndicatorRatingBar.getRating() != rating) {
- mIndicatorRatingBar.setRating(rating);
- mSmallRatingBar.setRating(rating);
- }
- final float ratingBarStepSize = ratingBar.getStepSize();
- if (mIndicatorRatingBar.getStepSize() != ratingBarStepSize) {
- mIndicatorRatingBar.setStepSize(ratingBarStepSize);
- mSmallRatingBar.setStepSize(ratingBarStepSize);
- }
- }
- }
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