模仿 ios 分段单选

<?xml version="1.0" encoding="utf-8"?>  
<selector xmlns:android="http://schemas.android.com/apk/res/android" >  
    <item android:state_selected="true">  
        <shape >  
            <stroke android:color="#0079FF" android:width="1dp"/>  
            <solid android:color="#0079FF"/>  
            <corners android:topLeftRadius="3dp" android:bottomLeftRadius="3dp" android:topRightRadius="0dp" android:bottomRightRadius="0dp"/>  
        </shape>  
    </item>  
    <item>  
        <shape >  
            <stroke android:color="#0079FF" android:width="1dp"/>  
            <solid android:color="#FFFFFF"/>  
            <corners android:topLeftRadius="3dp" android:bottomLeftRadius="3dp" android:topRightRadius="0dp" android:bottomRightRadius="0dp"/>  
        </shape>  
    </item>  
</selector> 

<?xml version="1.0" encoding="utf-8"?>  
<selector xmlns:android="http://schemas.android.com/apk/res/android" >  
    <item android:state_selected="true">  
        <shape >  
            <stroke android:color="#0079FF" android:width="1dp"/>  
            <solid android:color="#0079FF"/>  
            <corners android:topLeftRadius="0dp" android:bottomLeftRadius="0dp" android:topRightRadius="3dp" android:bottomRightRadius="3dp"/>  
        </shape>  
    </item>  
    <item>  
        <shape >  
            <stroke android:color="#0079FF" android:width="1dp"/>  
            <solid android:color="#FFFFFF"/>  
            <corners android:topLeftRadius="0dp" android:bottomLeftRadius="0dp" android:topRightRadius="3dp" android:bottomRightRadius="3dp"/>  
        </shape>  
    </item>  
</selector> 

    <?xml version="1.0" encoding="utf-8"?>  
    <selector xmlns:android="http://schemas.android.com/apk/res/android" >  
        <item android:state_selected="true" android:color="#FFFFFF"/>  
        <item android:color="#0079FF"/>  
    </selector>  

    package cn.haiwan.app.widget;  
      
    import org.xmlpull.v1.XmlPullParser;  
      
    import android.R.integer;  
    import android.content.Context;  
    import android.content.res.ColorStateList;  
    import android.util.AttributeSet;  
    import android.util.TypedValue;  
    import android.view.Gravity;  
    import android.view.View;  
    import android.widget.LinearLayout;  
    import android.widget.TextView;  
    import cn.haiwan.R;  
      
    public class SegmentView extends LinearLayout {  
        private TextView textView1;  
        private TextView textView2;  
        private onSegmentViewClickListener listener;  
        public SegmentView(Context context, AttributeSet attrs) {  
            super(context, attrs);  
            init();  
        }  
          
        public SegmentView(Context context) {  
            super(context);  
            init();  
        }  
      
        private void init() {  
    //      this.setLayoutParams(new LinearLayout.LayoutParams(dp2Px(getContext(), 60), LinearLayout.LayoutParams.WRAP_CONTENT));  
            textView1 = new TextView(getContext());  
            textView2 = new TextView(getContext());  
            textView1.setLayoutParams(new LayoutParams(0, LayoutParams.WRAP_CONTENT, 1));  
            textView2.setLayoutParams(new LayoutParams(0, LayoutParams.WRAP_CONTENT, 1));  
            textView1.setText("SEG1");  
            textView2.setText("SEG2");  
            XmlPullParser xrp = getResources().getXml(R.drawable.seg_text_color_selector);    
            try {    
                ColorStateList csl = ColorStateList.createFromXml(getResources(), xrp);    
                textView1.setTextColor(csl);  
                textView2.setTextColor(csl);  
              } catch (Exception e) {    
            }   
            textView1.setGravity(Gravity.CENTER);  
            textView2.setGravity(Gravity.CENTER);  
            textView1.setPadding(3, 6, 3, 6);  
            textView2.setPadding(3, 6, 3, 6);  
            setSegmentTextSize(16);  
            textView1.setBackgroundResource(R.drawable.seg_left);  
            textView2.setBackgroundResource(R.drawable.seg_right);  
            textView1.setSelected(true);  
            this.removeAllViews();  
            this.addView(textView1);  
            this.addView(textView2);  
            this.invalidate();  
              
            textView1.setOnClickListener(new OnClickListener() {  
                  
                @Override  
                public void onClick(View v) {  
                    if (textView1.isSelected()) {  
                        return;  
                    }  
                    textView1.setSelected(true);  
                    textView2.setSelected(false);  
                    if (listener != null) {  
                        listener.onSegmentViewClick(textView1, 0);  
                    }  
                }  
            });  
            textView2.setOnClickListener(new OnClickListener() {  
                  
                @Override  
                public void onClick(View v) {  
                    if (textView2.isSelected()) {  
                        return;  
                    }  
                    textView2.setSelected(true);  
                    textView1.setSelected(false);  
                    if (listener != null) {  
                        listener.onSegmentViewClick(textView2, 1);  
                    }  
                }  
            });  
        }  
 
        public void setSegmentTextSize(int dp) {  
            textView1.setTextSize(TypedValue.COMPLEX_UNIT_DIP, dp);  
            textView2.setTextSize(TypedValue.COMPLEX_UNIT_DIP, dp);  
        }  
          
        private static int dp2Px(Context context, float dp) {  
            final float scale = context.getResources().getDisplayMetrics().density;  
            return (int) (dp * scale + 0.5f);  
        }  
          
        public void setOnSegmentViewClickListener(onSegmentViewClickListener listener) {  
            this.listener = listener;  
        }  
        
        public void setSegmentText(CharSequence text,int position) {  
            if (position == 0) {  
                textView1.setText(text);  
            }  
            if (position == 1) {  
                textView2.setText(text);  
            }  
        }  
          
        public static interface onSegmentViewClickListener{  
            public void onSegmentViewClick(View v,int position);  
        }  
    }  

<?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" >  
     
    <cn.haiwan.app.widget.SegmentView   
        android:layout_width="160dp"  
        android:layout_height="wrap_content"android:layout_centerHorizontal="true"  
        />  
</LinearLayout>