seekBar，RatingBar拖动条

RatingBar：星级评分条与拖动条十分相似，它们有相同的父类：AbsSeekBar。

星级评分条：

XML 属性	说明
android:isIndicator	是否允许用户改变 (true 为不允许 )
android:numStars	设置总共有多少颗星星
android:rating	设置默认星级
android:stepSize	设置每次最少需要改变多少个星级

布局文件：

                    <?xmlversion="1.0"encoding="utf-8"?>
            <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            >
            
            <ImageView 
            android:id="@+id/imagei3"
            android:layout_width="fill_parent"
            android:layout_height="300px"
            android:src="@drawable/i3"
            />
            
            <TextView
            android:id="@+id/seektv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_x="150dp"
            android:text=""/>
             
            
            <SeekBar
            android:id="@+id/seekbar"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:max="100"
            android:progress="50"
            />
            
            <RatingBar
            android:id="@+id/ratingbar"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:max="100"
            android:progress="50"
            android:isIndicator="false"
            android:numStars="100"
            android:stepSize="0.05"
            />
            
            </LinearLayout>

利用seekbar和Ratingbar改编照片alpha值：

                    importandroid.app.Activity; 
            importandroid.os.Bundle; 
            importandroid.widget.ImageView; 
            importandroid.widget.RatingBar; 
            importandroid.widget.SeekBar; 
            importandroid.widget.TextView; 
            importandroid.widget.RatingBar.OnRatingBarChangeListener; 
            importandroid.widget.SeekBar.OnSeekBarChangeListener; 
            
            publicclassAndroidtestActivity13extendsActivity{ 
            privateImageViewiv; 
            privateTextViewtv; 
            privateSeekBarsb; 
            privateRatingBarrb; 
            @Override
            publicvoidonCreate(BundlesavedInstanceState) 
            { 
            super.onCreate(savedInstanceState); 
            setContentView(R.layout.main13); 
             
            iv=(ImageView)findViewById(R.id.imagei3); 
            tv=(TextView)findViewById(R.id.seektv); 
            sb=(SeekBar)findViewById(R.id.seekbar); 
            rb=(RatingBar)findViewById(R.id.ratingbar); 
             
            iv.setAlpha((int)(sb.getProgress()*2.55)); 
            tv.setText(String.valueOf(sb.getProgress())); 
            rb.setProgress(sb.getProgress()); 
            //sb.setOnSeekBarChangeListener(seekbarchangelistener); 
            rb.setOnRatingBarChangeListener(ratingbarchangelistener); 
            } 
            //seekbar改变监听事件 
            privateOnSeekBarChangeListenerseekbarchangelistener=newOnSeekBarChangeListener(){ 
             
            @Override
            publicvoidonStopTrackingTouch(SeekBarseekBar){ 
            } 
             
            @Override
            publicvoidonStartTrackingTouch(SeekBarseekBar){ 
            } 
             
            @Override
            publicvoidonProgressChanged(SeekBarseekBar,intprogress, 
            booleanfromUser){ 
            iv.setAlpha((int)(progress*2.55)); 
            tv.setText(String.valueOf(progress)); 
            rb.setProgress(progress); 
            } 
            }; 
            //ratingbar改变监听事件 
            privateOnRatingBarChangeListenerratingbarchangelistener=newOnRatingBarChangeListener(){ 
             
            @Override
            publicvoidonRatingChanged(RatingBarratingBar,floatrating, 
            booleanfromUser){ 
            iv.setAlpha((int)(rating*2.55)); 
            tv.setText(String.valueOf(rating)); 
            sb.setProgress((int)rating); 
             
            } 
            }; 
            }

本文出自 “个人笔记” 博客，谢绝转载！

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