布局文件內(nèi)容：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="@+id/imageView"
android:layout_width="match_parent"
android:layout_height="400dp"
android:src="@drawable/dog_004"
android:scaleType="fitCenter"
/>
<RatingBar
android:id="@+id/ratingBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:numStars="5"
android:max="255"
android:progress="255"
android:stepSize="0.5"
/>
</LinearLayout>
主程序文件內(nèi)容;
package com.toby.personal.testlistview;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
import android.widget.RatingBar;
public class MainActivity extends AppCompatActivity {
final private static String TAG = "Toby_Test";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ImageView imageView = (ImageView) findViewById(R.id.imageView);
final RatingBar ratingBar = (RatingBar) findViewById(R.id.ratingBar);
ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
@Override
public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
imageView.setImageAlpha((int)(rating * 255 /5));
}
});
}
}
運(yùn)行效果：
RatingBar 使用示例
參考文獻(xiàn)：《瘋狂Android講義（第2版）》
