关于安卓开发实现拖动条和星级评论

拖动条组件(SeekBar)

<SeekBar        android:id="@+id/seekBar1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:max="100"      //设置最大值        android:progress="0"   //设置初值        android:padding="10px"/>

星级评分条(RatingBar)

<RatingBar        android:id="@+id/ratingBar1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:numStars="5" //设置几星级        android:rating="3.5"    //设置初始星级        android:isIndicator="false"  //设置允许用户改变星级         />

完整代码

layout

<?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" >    <TextView        android:id="@+id/now_num"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="当前值:0"        android:textAppearance="?android:attr/textAppearanceLarge" />    <SeekBar        android:id="@+id/seekBar1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:max="100"        android:progress="0"         android:padding="10px"/>    <RatingBar        android:id="@+id/ratingBar1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:numStars="5"        android:rating="3.5"        android:isIndicator="false"         />    <Button        android:id="@+id/button_star"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="评分" /></LinearLayout>

java文件

 1 package lianxi; 2  3 import com.example.jichu_lianxi.R; 4  5 import android.app.Activity; 6 import android.os.Bundle; 7 import android.util.Log; 8 import android.view.View; 9 import android.view.View.OnClickListener;10 import android.widget.Button;11 import android.widget.RatingBar;12 import android.widget.SeekBar;13 import android.widget.SeekBar.OnSeekBarChangeListener;14 import android.widget.TextView;15 import android.widget.Toast;16 17 public class SeekBar_Or_RatingBar extends Activity{18     private SeekBar seekbar;     //拖动条19     private TextView text;       //显示拖动条当前值的文本框20     private Button button_star;  //评分按钮21     private RatingBar ratingbar;22     @Override23     protected void onCreate(Bundle savedInstanceState) {24         // TODO Auto-generated method stub25         super.onCreate(savedInstanceState);26         setContentView(R.layout.seekbar_or_ratingbar);27         28         seekbar = (SeekBar) findViewById(R.id.seekBar1);29         text = (TextView) findViewById(R.id.now_num);30         button_star = (Button) findViewById(R.id.button_star);31         ratingbar = (RatingBar) findViewById(R.id.ratingBar1);32         //拖动条的响应事件33         seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {   34             35             //结束拖动时的响应事件36             @Override37             public void onStopTrackingTouch(SeekBar seekBar) {38                 // TODO Auto-generated method stub39                 Toast.makeText(SeekBar_Or_RatingBar.this, "结束滑动", Toast.LENGTH_SHORT).show();40                 41             }42             //开始拖动时的响应事件43             @Override44             public void onStartTrackingTouch(SeekBar seekBar) {45                 // TODO Auto-generated method stub46                 Toast.makeText(SeekBar_Or_RatingBar.this, "开始滑动", Toast.LENGTH_SHORT).show();47             }48             //拖动过程中的响应事件49             @Override50             public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {51                 // TODO Auto-generated method stub52                 text.setText("当前值:"+progress);    53             }54         });55         //评分按钮的响应事件56         button_star.setOnClickListener(new OnClickListener() {57             58             @Override59             public void onClick(View v) {60                 // TODO Auto-generated method stub61                 int result = ratingbar.getProgress(); //获取进度62                 float rating = ratingbar.getRating(); //获取等级63                 float step = ratingbar.getStepSize(); //获取每次最少要改变多少星级64                 Toast.makeText(SeekBar_Or_RatingBar.this, "你得到了"+rating+"颗星", Toast.LENGTH_SHORT).show();65                 66                 67             }68         });69     }70 71 }

效果图

关于安卓开发实现拖动条和星级评论

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