Android仿正点闹钟时间齿轮滑动效果

看到正点闹钟上的设置时间的滑动效果非常好看，自己就想做一个那样的，在网上就开始搜资料了，看到网上有的齿轮效果的代码非常多，也非常难懂，我就决定自己研究一下，现在我就把我的研究成果分享给大家。我研究的这个效果出来了，而且代码也非常简单，通俗易懂。效果图如下：

首先是MainActivity的布局文件，这个布局文件非常简单，就是一个Button：activity_main.xml文件，代码如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/ll_timeset"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:background="#ffffff"
  android:orientation="vertical" > 

  <Button
    android:id="@+id/btn"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:text="时间设置"
    android:textSize="24sp" /> 

</LinearLayout> 

紧接着就是MainActivity的代码，代码如下：

package net.loonggg.test; 

import net.loonggg.view.CustomerDateDialog;
import net.loonggg.view.CustomerDateDialog.DateDialogListener;
import android.app.Activity;
import android.os.Bundle;
import android.text.format.DateFormat;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.Toast; 

public class MainActivity extends Activity {
  private int h, m;
  private CustomerDateDialog dialog;
  private Button btn; 

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_main);
    btn = (Button) findViewById(R.id.btn);
    btn.setOnClickListener(new View.OnClickListener() { 

      @Override
      public void onClick(View v) {
        String datetime = DateFormat.format("kk:mm",
            System.currentTimeMillis()).toString();
        String[] strs = datetime.split(":");
        h = Integer.parseInt(strs[0]);
        m = Integer.parseInt(strs[1]);
        dialog = new CustomerDateDialog(MainActivity.this, h, m);
        dialog.show();
        dialog.setOnDateDialogListener(new DateDialogListener() {
          @Override
          public void getDate() {
            Toast.makeText(
                MainActivity.this,
                "时间是:" + dialog.getSettingHour() + "点"
                    + dialog.getSettingMinute() + "分",
                Toast.LENGTH_LONG).show();
          }
        }); 

      }
    }); 

  } 

} 

再就是我自定义了一个时钟的Dialog,自定义Dialog也非常简单，自己可以学一下，这方面网上的资料非常多。现在我把我自定义时钟的Dialog的代码分享一下，代码如下：

package net.loonggg.view; 

import net.loonggg.test.R;
import android.annotation.SuppressLint;
import android.app.Dialog;
import android.content.Context;
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.ViewTreeObserver;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TextView; 

@SuppressLint("HandlerLeak")
public class CustomerDateDialog extends Dialog {
  private View customView;
  private Button setBtn;
  private Button cancleBtn;
  private TextView arrow_up;
  private TextView tv01, tv02;
  private ScrollView sv01, sv02;
  private LinearLayout llTimeWheel;
  private DateDialogListener listener;
  private int lastY;
  private int flag;// 标记时分
  private int itemHeight;// 每一行的高度
  private int pHour, pMinute;// 初始化时显示的时分时间
  private int setHour, setMinute; 

  public CustomerDateDialog(Context context, int hour, int minute) {
    super(context, R.style.CustomerDateDialog);
    customView = LayoutInflater.from(context).inflate(R.layout.time_wheel,
        null);
    init(context, hour, minute);
  } 

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.setContentView(customView);
  } 

  private void init(Context context, final int hour, final int minute) {
    tv01 = (TextView) customView.findViewById(R.id.tv01);
    tv02 = (TextView) customView.findViewById(R.id.tv02);
    sv01 = (ScrollView) customView.findViewById(R.id.sv01);
    sv02 = (ScrollView) customView.findViewById(R.id.sv02);
    setBtn = (Button) customView.findViewById(R.id.setBtn);
    cancleBtn = (Button) customView.findViewById(R.id.cancleBtn);
    arrow_up = (TextView) customView.findViewById(R.id.arrow_up);
    this.pHour = hour;
    this.pMinute = minute;
    setHour = pHour;
    setMinute = pMinute; 

    llTimeWheel = (LinearLayout) customView
        .findViewById(R.id.ll_time_wheel);
    setHourDial(tv01);
    setMinuteDial(tv02); 

    sv01.setOnTouchListener(tListener);
    sv02.setOnTouchListener(tListener); 

    final ViewTreeObserver observer = sv01.getViewTreeObserver();// observer
                                    // 作用当视图完全加载进来的时候再取控件的高度，否则取得值是0
    observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { 

      @SuppressWarnings("deprecation")
      public void onGlobalLayout() {
        int tvHeight = tv02.getHeight();
        itemHeight = tvHeight / 180;
        if (sv01.getViewTreeObserver().isAlive()) {
          sv01.getViewTreeObserver().removeGlobalOnLayoutListener(
              this);
        }
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.FILL_PARENT, (itemHeight * 3)
                + arrow_up.getHeight() * 2);
        llTimeWheel.setLayoutParams(params);
        sv01.setLayoutParams(new LinearLayout.LayoutParams(tv02
            .getWidth(), (itemHeight * 3)));
        sv02.setLayoutParams(new LinearLayout.LayoutParams(tv02
            .getWidth(), (itemHeight * 3)));
        sv01.scrollTo(0, (pHour + 23) * itemHeight);
        sv02.scrollTo(0, (pMinute + 59) * itemHeight); 

      }
    }); 

    setBtn.setOnClickListener(new View.OnClickListener() { 

      @Override
      public void onClick(View v) {
        getSettingDate();
        CustomerDateDialog.this.cancel();
      }
    }); 

    cancleBtn.setOnClickListener(new View.OnClickListener() { 

      @Override
      public void onClick(View v) {
        CustomerDateDialog.this.cancel();
      }
    });
  } 

  private OnTouchListener tListener = new OnTouchListener() { 

    public boolean onTouch(View v, MotionEvent event) {
      if (v == sv01) {
        flag = 1;
      } else {
        flag = 2;
      }
      if (event.getAction() == MotionEvent.ACTION_UP) {
        final ScrollView sv = (ScrollView) v;
        lastY = sv.getScrollY();
        System.out.println("lastY" + lastY);
        handler.sendMessageDelayed(handler.obtainMessage(0, v), 50);
      }
      return false;
    }
  }; 

  private Handler handler = new Handler() {
    @SuppressLint("HandlerLeak")
    public void handleMessage(android.os.Message msg) {
      ScrollView sv = (ScrollView) msg.obj; 

      if (msg.what == 0) {
        if (lastY == sv.getScrollY()) { 

          int num = lastY / itemHeight;
          int over = lastY % itemHeight;
          if (over > itemHeight / 2) {// 超过一半滚到下一格
            locationTo((num + 1) * itemHeight, sv, flag);
          } else {// 不到一半滚回上一格
            locationTo(num * itemHeight, sv, flag);
          }
        } else {
          lastY = sv.getScrollY();
          handler.sendMessageDelayed(handler.obtainMessage(0, sv), 50);// 滚动还没停止隔50毫秒再判断
        }
      } 

    };
  }; 

  private void locationTo(int position, ScrollView scrollview, int flag) {
    switch (flag) {
    case 1:
      int mPosition = 0;
      if (position <= 23 * itemHeight) {
        mPosition = position + 24 * itemHeight;
        scrollview.scrollTo(0, mPosition);
      } else if (position >= 48 * itemHeight) {
        mPosition = position - 24 * itemHeight;
        scrollview.scrollTo(0, mPosition);
      } else {
        mPosition = position;
        scrollview.smoothScrollTo(0, position);
      }
      setHour = (mPosition / itemHeight - 23) % 24;
      break; 

    case 2:
      int hPosition = 0;
      if (position <= 57 * itemHeight) {
        hPosition = position + 60 * itemHeight;
        scrollview.scrollTo(0, hPosition);
      } else if (position >= 120 * itemHeight) {
        hPosition = position - 60 * itemHeight;
        scrollview.scrollTo(0, hPosition);
      } else {
        hPosition = position;
        scrollview.smoothScrollTo(0, position);
      }
      setMinute = (hPosition / itemHeight) % 60 + 1;
      break;
    } 

  } 

  /**
   * 设置分刻度盘
   *
   * @param tv
   */ 

  private void setMinuteDial(TextView tv) {
    StringBuffer buff = new StringBuffer();
    for (int i = 0; i < 3; i++) {
      for (int j = 0; j < 60; j++) {
        if (j <= 9) {
          buff.append("0" + j);
        } else {
          buff.append(j + "");
        }
      }
    } 

    tv.setText(buff);
  } 

  /**
   * 设置时刻度盘
   *
   * @param tv
   */
  private void setHourDial(TextView tv) {
    StringBuffer buff = new StringBuffer();
    for (int i = 0; i < 3; i++) {
      for (int j = 0; j < 24; j++) {
        if (j <= 9) {
          buff.append("0" + j);
        } else {
          buff.append(j + "");
        }
      } 

    } 

    tv.setText(buff);
  } 

  public void setpHour(int pHour) {
    this.pHour = pHour;
  } 

  public void setpMinute(int pMinute) {
    this.pMinute = pMinute;
  } 

  public void setOnDateDialogListener(DateDialogListener listener) {
    this.listener = listener;
  } 

  public interface DateDialogListener {
    void getDate();
  } 

  public void getSettingDate() {
    if (listener != null) {
      listener.getDate();
    }
  } 

  public int getSettingHour() {
    return setHour;
  } 

  public int getSettingMinute() {
    return setMinute;
  } 

} 

这里光有java代码还不够，还有自定义Dialog的布局文件，time_wheel.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:background="#efefef"
  android:orientation="vertical" > 

  <TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@color/light_black"
    android:paddingLeft="10dp"
    android:text="设置时间"
    android:textColor="@color/black"
    android:textSize="24sp" /> 

  <!-- 时间的相关设置 --> 

  <LinearLayout
    android:id="@+id/ll_time_wheel"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="15dp"
    android:background="#f0f0f0"
    android:gravity="center_horizontal"
    android:orientation="horizontal" > 

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

      <TextView
        android:layout_width="30dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/wheel_arrow_up" /> 

      <ScrollView
        android:id="@+id/sv01"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/time_bg"
        android:scrollbars="none" > 

        <LinearLayout
          android:id="@+id/ll01"
          android:layout_width="50dp"
          android:layout_height="wrap_content"
          android:gravity="center"
          android:orientation="horizontal"
          android:paddingTop="5dp" > 

          <TextView
            android:id="@+id/tv01"
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:lineSpacingExtra="20dp"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:textSize="26sp" />
        </LinearLayout>
      </ScrollView> 

      <TextView
        android:layout_width="30dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/wheel_arrow_down" />
    </LinearLayout> 

    <TextView
      android:layout_width="wrap_content"
      android:layout_height="fill_parent"
      android:layout_gravity="center"
      android:background="#f0f0f0"
      android:gravity="center"
      android:text="时"
      android:textColor="#000000"
      android:textSize="25sp" /> 

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

      <TextView
        android:id="@+id/arrow_up"
        android:layout_width="30dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/wheel_arrow_up" /> 

      <ScrollView
        android:id="@+id/sv02"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/time_bg"
        android:scrollbars="none" > 

        <LinearLayout
          android:id="@+id/ll02"
          android:layout_width="50dp"
          android:layout_height="wrap_content"
          android:gravity="center"
          android:paddingTop="5dp" > 

          <TextView
            android:id="@+id/tv02"
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:lineSpacingExtra="20dp"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:textSize="26sp" />
        </LinearLayout>
      </ScrollView> 

      <TextView
        android:id="@+id/arrow_down"
        android:layout_width="30dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/wheel_arrow_down" />
    </LinearLayout> 

    <TextView
      android:layout_width="wrap_content"
      android:layout_height="fill_parent"
      android:layout_gravity="center"
      android:background="#f0f0f0"
      android:gravity="center"
      android:text="分"
      android:textColor="#000000"
      android:textSize="25sp" />
  </LinearLayout> 

  <!-- 设置时钟的按钮 --> 

  <RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="50dp" > 

    <Button
      android:id="@+id/setBtn"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentLeft="true"
      android:layout_gravity="center_horizontal"
      android:layout_marginLeft="25dp"
      android:background="@drawable/btn_clock_normal"
      android:gravity="center"
      android:paddingLeft="10dp"
      android:paddingRight="10dp"
      android:text="确定"
      android:textColor="#000000"
      android:textSize="24sp" /> 

    <Button
      android:id="@+id/cancleBtn"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentRight="true"
      android:layout_gravity="center_horizontal"
      android:layout_marginRight="25dp"
      android:background="@drawable/btn_clock_normal"
      android:gravity="center"
      android:paddingLeft="10dp"
      android:paddingRight="10dp"
      android:text="取消"
      android:textColor="#000000"
      android:textSize="24sp" />
  </RelativeLayout> 

</LinearLayout> 

为了让自定义的Dialog的样式更好看，这里还需要自定义样式的Style，Style的代码如下；

<style name="CustomerDateDialog" parent="@android:Theme.Dialog">
    <item name="android:windowFrame">@null</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowBackground">@color/light_grey</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowContentOverlay">@null</item>
  </style>

到这里基本上就完了。你看懂了吗？好好研究吧！

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。

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