Android实现滑动刻度尺效果，选择身高体重和生日

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/tab_blue"
    android:gravity="center_vertical"
    android:orientation="vertical"
    tools:context=".MainActivity" >


    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:layout_marginTop="10dp" >


        <LinearLayout
            android:id="@+id/two"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:orientation="vertical" >


            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:text="出生年"
                android:textColor="@color/white"
                android:textSize="16sp" />


            <TextView
                android:id="@+id/user_birth_value"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="5dp"
                android:text="1972"
                android:textColor="@color/white"
                android:textSize="18sp"
                android:textStyle="bold" />
        </LinearLayout>


        <HorizontalScrollView
            android:id="@+id/birthruler"
            android:layout_width="fill_parent"
            android:layout_height="60dp"
            android:layout_centerVertical="true"
            android:layout_marginLeft="5dp"
            android:layout_toRightOf="@id/two"
            android:background="@drawable/birthday_ruler"
            android:scrollbars="none" >


            <LinearLayout
                android:id="@+id/ruler_layout"
                android:layout_width="wrap_content"
                android:layout_height="fill_parent"
                android:gravity="center_vertical"
                android:orientation="horizontal" >
            </LinearLayout>
        </HorizontalScrollView>
    </RelativeLayout>


</LinearLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="100dp"
    android:layout_height="fill_parent"
    android:layout_marginBottom="20dp"
    android:background="@null"
    android:orientation="vertical" >


    <TextView
        android:id="@+id/hrulerunit"
        android:layout_width="100dp"
        android:layout_height="20dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:background="@null"
        android:textColor="@color/white"
        android:textSize="14sp" />


</RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_marginBottom="20dp"
    android:orientation="vertical" >


    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginBottom="25dp"
        android:layout_marginTop="3dp"
        android:background="@null"
        android:contentDescription="@null"
        android:scaleType="fitXY"
        android:src="@drawable/rulerscale_horizontal" />


    <TextView
        android:id="@+id/hrulerunit"
        android:layout_width="wrap_content"
        android:layout_height="20dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:background="@null"
        android:textColor="@color/white"
        android:textSize="14sp" />


</RelativeLayout>

package net.loonggg.rulerdemo;


import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;


import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.TextView;


public class MainActivity extends Activity {
 private HorizontalScrollView ruler;
 private LinearLayout rulerlayout, all_layout;
 private TextView user_birth_value;
 private int beginYear;


 private String birthyear = "1970";
 private long time = 0;
 private int screenWidth;
 private boolean isFirst = true;


 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 user_birth_value = (TextView) findViewById(R.id.user_birth_value);
 user_birth_value.setText("1970");
 ruler = (HorizontalScrollView) findViewById(R.id.birthruler);
 rulerlayout = (LinearLayout) findViewById(R.id.ruler_layout);
 ruler.setOnTouchListener(new OnTouchListener() {


 @Override
 public boolean onTouch(View v, MotionEvent event) {
 int action = event.getAction();
 user_birth_value.setText(String.valueOf(beginYear
 + (int) Math.ceil((ruler.getScrollX()) / 20)));
 switch (action) {
 case MotionEvent.ACTION_DOWN:
 case MotionEvent.ACTION_MOVE:
 break;
 case MotionEvent.ACTION_UP:
 new Handler().postDelayed(new Runnable() {
 @Override
 public void run() {
 user_birth_value.setText(String.valueOf(beginYear
 + (int) Math.ceil((ruler.getScrollX()) / 20)));
 birthyear = String.valueOf((int) (beginYear + Math
 .ceil((ruler.getScrollX()) / 20)));
 try {
 time = (new SimpleDateFormat("yyyy")
 .parse(String.valueOf(birthyear)))
 .getTime();
 } catch (ParseException e) {
 e.printStackTrace();
 }
 }
 }, 1000);
 break;
 }
 return false;
 }


 });
 }


 @Override
 public void onWindowFocusChanged(boolean hasFocus) {
 super.onWindowFocusChanged(hasFocus);
 if (isFirst) {
 screenWidth = ruler.getWidth();
 constructRuler();
 isFirst = false;
 }
 }


 @Override
 protected void onResume() {
 super.onResume();
 new Handler().postDelayed(new Runnable() {
 @Override
 public void run() {
 scroll();
 }
 }, 100);
 }


 private void scroll() {
 ruler.smoothScrollTo((1970 - beginYear) * 20, 0);
 }


 @SuppressWarnings("deprecation")
 private void constructRuler() {
 int year = new Date().getYear();
 if (year < 2015)
 year = 2010;
 beginYear = year / 10 * 10 - 150;
 View leftview = (View) LayoutInflater.from(this).inflate(
 R.layout.blankhrulerunit, null);
 leftview.setLayoutParams(new LayoutParams(screenWidth / 2,
 LayoutParams.MATCH_PARENT));
 rulerlayout.addView(leftview);
 for (int i = 0; i < 16; i++) {
 View view = (View) LayoutInflater.from(this).inflate(
 R.layout.hrulerunit, null);
 view.setLayoutParams(new LayoutParams(200,
 LayoutParams.MATCH_PARENT));
 TextView tv = (TextView) view.findViewById(R.id.hrulerunit);
 tv.setText(String.valueOf(beginYear + i * 10));
 rulerlayout.addView(view);
 }
 View rightview = (View) LayoutInflater.from(this).inflate(
 R.layout.blankhrulerunit, null);
 rightview.setLayoutParams(new LayoutParams(screenWidth / 2,
 LayoutParams.MATCH_PARENT));
 rulerlayout.addView(rightview);
 }


}