Android实现竖着的滑动刻度尺效果，选择身高（竖向的）

这次是你想要的效果哦！高兴了吧？高兴地话，你不用给我打赏，分享到朋友圈，我就很高兴了。

群里有人问我要竖着的滑动尺效果，前天我贱贱地分享了一个横向的滑动效果，让大家模仿者，自己尝试着去改编一下，不知道有多少人弄出来了，尝试着去弄得请举手，好吧，我也不用说放下了，根本就没人举。我再说一句废话吧，努力去尝试，才会有进步，不要坐等着别人来帮助你，这样你会饿死的，因为很多人不会像我一样去给你分享。

我大声喊一句：盖茨（翠花），上代码。

效果如下：

第一步：activity_mian.xml布局:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/user_weight"
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:orientation="horizontal" >

        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:layout_weight="1"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/user_height_value"
                android:layout_width="fill_parent"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:gravity="center"
                android:textColor="#000000"
                android:textSize="20sp" />

            <ImageView
                android:id="@+id/userheight"
                android:layout_width="fill_parent"
                android:layout_height="0dp"
                android:layout_margin="10dp"
                android:layout_weight="1"
                android:background="@null"
                android:contentDescription="@null"
                android:src="@drawable/my_self_girl" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical" >

            <RelativeLayout
                android:id="@+id/v_ruler"
                android:layout_width="80dp"
                android:layout_height="fill_parent"
                android:background="@drawable/my_self_h_ruler" >

                <ImageView
                    android:layout_width="80dp"
                    android:layout_height="2dp"
                    android:layout_centerVertical="true"
                    android:background="@null"
                    android:contentDescription="@null"
                    android:src="@drawable/rulerscale_vertical_selected" />

                <ScrollView
                    android:id="@+id/vruler"
                    android:layout_width="100dp"
                    android:layout_height="fill_parent"
                    android:scrollbars="none" >

                    <LinearLayout
                        android:id="@+id/vruler_layout"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="10dp"
                        android:layout_marginRight="10dp"
                        android:gravity="center_vertical"
                        android:orientation="vertical" >
                    </LinearLayout>
                </ScrollView>
            </RelativeLayout>
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

第二步：竖向空白刻度布局，blankvrulerunit.xml:

<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:layout_marginTop="5dp"
    android:background="@null"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/vrulerunit"
        android:layout_width="50dp"
        android:layout_height="20dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:background="@null"
        android:textColor="#000000"
        android:textSize="14sp" />

</RelativeLayout>

第三步：中间刻度尺布局，vrulerunit.xml:

<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:layout_marginTop="5dp"
    android:orientation="vertical" >

    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginRight="30dp"
        android:background="@null"
        android:contentDescription="@null"
        android:scaleType="fitXY"
        android:src="@drawable/rulerscale_vertical" />

    <TextView
        android:id="@+id/vrulerunit"
        android:layout_width="50dp"
        android:layout_height="20dp"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:background="@null"
        android:textColor="#000000"
        android:textSize="14sp" />

</RelativeLayout>

第四步：MainActivity.java主代码实现：

public class MainActivity extends Activity {    
    private ScrollView ruler;    
    private TextView user_height_value;    
    private LinearLayout rulerlayout;    
    private String height = "170";    

    @Override
    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initViews();
    }    

    @Override
    protected void onResume() {        
        super.onResume();        
        new Handler().postDelayed(new Runnable() {            
            @Override
            public void run() {
                scroll();
            }
        }, 400);
    }    
    
    private void scroll() {
        ruler.smoothScrollTo(0, 1700);
    }    
    
    protected void initViews() {

        user_height_value = (TextView) findViewById(R.id.user_height_value);
        user_height_value.setText("身高是: " + height + " CM");

        ruler = (ScrollView) findViewById(R.id.vruler);
        ruler.setOnTouchListener(new OnTouchListener() {            @Override
            public boolean onTouch(View v, MotionEvent event) {                int action = event.getAction();
             user_height_value.setText("身高是: "
                        + String.valueOf((int) Math.ceil((ruler.getScrollY()) / 10))
                        + " CM");                
            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_height_value.setText("身高是: "
                                    + String.valueOf((int) Math.ceil((ruler
                                            .getScrollY()) / 10)) + " CM");
                        }
                    }, 1000);                    
                    break;
                }                
                return false;
            }

        });

        rulerlayout = (LinearLayout) findViewById(R.id.vruler_layout);        new Handler().postDelayed((new Runnable() {            @Override
            public void run() {
                constructRuler();
            }
        }), 300);

    }    
    private void constructRuler() {        
        int rulerHeight = ruler.getHeight();

        View topview = (View) LayoutInflater.from(this).inflate(
                R.layout.blankvrulerunit, null);
        topview.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
                rulerHeight / 2));
        rulerlayout.addView(topview);        
        for (int i = 0; i < 25; i++) {
            View view = (View) LayoutInflater.from(this).inflate(
                    R.layout.vrulerunit, null);
            view.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,                    100));
            TextView tv = (TextView) view.findViewById(R.id.vrulerunit);
            tv.setText(String.valueOf(i * 10));
            rulerlayout.addView(view);
        }
        View bottomview = (View) LayoutInflater.from(this).inflate(
                R.layout.blankvrulerunit, null);
        bottomview.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
                rulerHeight / 2));
        rulerlayout.addView(bottomview);
    }

}

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