模仿 ios 分段单选

http://blog.csdn.net/qduningning/article/details/37935227

res/drawable/seg_left.xml

<?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> 

res/drawable/seg_right.xml

<?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> 

字体颜色： res/drawable/seg_text_color_selector.xml

    <?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>