http://blog.csdn.net/dawanganban/article/details/20408505
上一篇《是男人就下100层【第一层】——高仿微信界面(7)》中我们实现了下弹式菜单,这一篇我们来看看如何实现微信中的摇一摇功能。
首先我们来布局我们的摇一摇界面
布局文件如下:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical"
- android:background="#111"
- >
- <RelativeLayout
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:layout_centerInParent="true" >
- <ImageView
- android:id="@+id/shakeBg"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:src="@drawable/shakehideimg_man2" />
- <LinearLayout
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:orientation="vertical" >
- <RelativeLayout
- android:id="@+id/shakeImgUp"
- android:layout_width="fill_parent"
- android:layout_height="190dp"
- android:background="#111">
- <ImageView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentBottom="true"
- android:layout_centerHorizontal="true"
- android:src="@drawable/shake_logo_up"
- />
- </RelativeLayout>
- <RelativeLayout
- android:id="@+id/shakeImgDown"
- android:layout_width="fill_parent"
- android:layout_height="190dp"
- android:background="#111">
- <ImageView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerHorizontal="true"
- android:src="@drawable/shake_logo_down"
- />
- </RelativeLayout>
- </LinearLayout>
- </RelativeLayout>
- <RelativeLayout
- android:id="@+id/shake_title_bar"
- android:layout_width="fill_parent"
- android:layout_height="45dp"
- android:background="@drawable/title_bar"
- android:gravity="center_vertical" >
- <Button
- android:layout_width="70dp"
- android:layout_height="wrap_content"
- android:layout_centerVertical="true"
- android:text="返回"
- android:textSize="14sp"
- android:textColor="#fff"
- android:onClick="shake_activity_back"
- android:background="@drawable/title_btn_back"/>
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="摇一摇"
- android:layout_centerInParent="true"
- android:textSize="20sp"
- android:textColor="#ffffff" />
- <ImageButton
- android:layout_width="67dp"
- android:layout_height="wrap_content"
- android:layout_alignParentRight="true"
- android:layout_centerVertical="true"
- android:layout_marginRight="5dp"
- android:src="@drawable/mm_title_btn_menu"
- android:background="@drawable/title_btn_right"
- android:onClick="linshi"
- />
- </RelativeLayout>
- <SlidingDrawer
- android:id="@+id/slidingDrawer1"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:content="@+id/content"
- android:handle="@+id/handle" >
- <Button
- android:id="@+id/handle"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="@drawable/shake_report_dragger_up" />
- <LinearLayout
- android:id="@+id/content"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:background="#f9f9f9" >
- <ImageView
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:scaleType="fitXY"
- android:src="@drawable/shake_line_up" />
- </LinearLayout>
- </SlidingDrawer>
- </RelativeLayout>
SlidingDrawer隐藏屏外的内容,并允许用户通过handle以显示隐藏内容。它可以垂直或水平滑动,它有俩个View组成,其一是可以拖动的handle,其二是隐藏内容的View.它里面的控件必须设置布局,在布局文件中必须指定handle和content.
接下来我们看看如何检查手机摇晃,摇一摇让手机震动
- package com.example.weixin.listener;
- import android.content.Context;
- import android.hardware.Sensor;
- import android.hardware.SensorEvent;
- import android.hardware.SensorEventListener;
- import android.hardware.SensorManager;
- import android.util.Log;
- /**
- * 一个检测手机摇晃的监听器
- */
- public class ShakeListener implements SensorEventListener {
- // 速度阈值,当摇晃速度达到这值后产生作用
- private static final int SPEED_SHRESHOLD = 3000;
- // 两次检测的时间间隔
- private static final int UPTATE_INTERVAL_TIME = 70;
- // 传感器管理器
- private SensorManager sensorManager;
- // 传感器
- private Sensor sensor;
- // 重力感应监听器
- private OnShakeListener onShakeListener;
- // 上下文
- private Context mContext;
- // 手机上一个位置时重力感应坐标
- private float lastX;
- private float lastY;
- private float lastZ;
- // 上次检测时间
- private long lastUpdateTime;
- // 构造器
- public ShakeListener(Context c) {
- // 获得监听对象
- mContext = c;
- start();
- }
- // 开始
- public void start() {
- // 获得传感器管理器
- sensorManager = (SensorManager) mContext
- .getSystemService(Context.SENSOR_SERVICE);
- if (sensorManager != null) {
- // 获得重力传感器
- sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
- }
- // 注册
- if (sensor != null) {
- sensorManager.registerListener(this, sensor,
- SensorManager.SENSOR_DELAY_GAME);
- }
- }
- // 停止检测
- public void stop() {
- sensorManager.unregisterListener(this);
- }
- // 设置重力感应监听器
- public void setOnShakeListener(OnShakeListener listener) {
- onShakeListener = listener;
- }
- // 重力感应器感应获得变化数据
- public void onSensorChanged(SensorEvent event) {
- // 现在检测时间
- long currentUpdateTime = System.currentTimeMillis();
- // 两次检测的时间间隔
- long timeInterval = currentUpdateTime - lastUpdateTime;
- // 判断是否达到了检测时间间隔
- if (timeInterval < UPTATE_INTERVAL_TIME)
- return;
- // 现在的时间变成last时间
- lastUpdateTime = currentUpdateTime;
- // 获得x,y,z坐标
- float x = event.values[0];
- float y = event.values[1];
- float z = event.values[2];
- // 获得x,y,z的变化值
- float deltaX = x - lastX;
- float deltaY = y - lastY;
- float deltaZ = z - lastZ;
- // 将现在的坐标变成last坐标
- lastX = x;
- lastY = y;
- lastZ = z;
- double speed = Math.sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ
- * deltaZ)
- / timeInterval * 10000;
- //Log.v("thelog", "===========log===================");
- // 达到速度阀值,发出提示
- if (speed >= SPEED_SHRESHOLD) {
- onShakeListener.onShake();
- }
- }
- public void onAccuracyChanged(Sensor sensor, int accuracy) {
- }
- // 摇晃监听接口
- public interface OnShakeListener {
- public void onShake();
- }
- }
SensorManager通过getDefaultSensor(int type)方法来获取指定类型的传感器。
- // 获得重力传感器
- sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
- sensorManager.registerListener(this, sensor,
- SensorManager.SENSOR_DELAY_GAME);
onSensorChanged()方法,当传感器的值发生改变时触发该方法。
onAccuracyChanged()方法,当传感器的精度发生改变时触发该方法。
- // 重力感应器感应获得变化数据
- public void onSensorChanged(SensorEvent event) {
- // 现在检测时间
- long currentUpdateTime = System.currentTimeMillis();
- // 两次检测的时间间隔
- long timeInterval = currentUpdateTime - lastUpdateTime;
- // 判断是否达到了检测时间间隔
- if (timeInterval < UPTATE_INTERVAL_TIME)
- return;
- // 现在的时间变成last时间
- lastUpdateTime = currentUpdateTime;
- // 获得x,y,z坐标
- float x = event.values[0];
- float y = event.values[1];
- float z = event.values[2];
- // 获得x,y,z的变化值
- float deltaX = x - lastX;
- float deltaY = y - lastY;
- float deltaZ = z - lastZ;
- // 将现在的坐标变成last坐标
- lastX = x;
- lastY = y;
- lastZ = z;
- double speed = Math.sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ
- * deltaZ)
- / timeInterval * 10000;
- //Log.v("thelog", "===========log===================");
- // 达到速度阀值,发出提示
- if (speed >= SPEED_SHRESHOLD) {
- onShakeListener.onShake();
- }
- }
这里计算速度的公式是高中学过的知识v=s/t=(a^2+b^2+c^2)/t
- double speed = Math.sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ
- * deltaZ)
- / timeInterval * 10000;
在Activity中创建摇动监听实例并设置监听
- mShakeListener = new ShakeListener(this);
- mShakeListener.setOnShakeListener(new OnShakeListener() {
- public void onShake() {
- //Toast.makeText(getApplicationContext(), "抱歉,暂时没有找到在同一时刻摇一摇的人。\n再试一次吧!", Toast.LENGTH_SHORT).show();
- startAnim(); //开始 摇一摇手掌动画
- mShakeListener.stop();
- startVibrato(); //开始 震动
- new Handler().postDelayed(new Runnable(){
- @Override
- public void run(){
- //Toast.makeText(getApplicationContext(), "抱歉,暂时没有找到\n在同一时刻摇一摇的人。\n再试一次吧!", 500).setGravity(Gravity.CENTER,0,0).show();
- Toast mtoast;
- mtoast = Toast.makeText(getApplicationContext(),
- "抱歉,暂时没有找到\n在同一时刻摇一摇的人。\n再试一次吧!", 10);
- //mtoast.setGravity(Gravity.CENTER, 0, 0);
- mtoast.show();
- mVibrator.cancel();
- mShakeListener.start();
- }
- }, 2000);
- }
- });
在设置监听之前,在Activity的onCreate方法中需呀获得系统提供的振动服务对象
- Vibrator mVibrator = (Vibrator)getApplication().getSystemService(VIBRATOR_SERVICE);
- public void startVibrato(){ //定义震动
- mVibrator.vibrate( new long[]{500,200,500,200}, -1); //第一个{}里面是节奏数组, 第二个参数是重复次数,-1为不重复,非-1俄日从pattern的指定下标开始重复
- }
- public void startAnim () { //定义摇一摇动画动画
- AnimationSet animup = new AnimationSet(true);
- TranslateAnimation mytranslateanimup0 = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,-0.5f);
- mytranslateanimup0.setDuration(1000);
- TranslateAnimation mytranslateanimup1 = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,+0.5f);
- mytranslateanimup1.setDuration(1000);
- mytranslateanimup1.setStartOffset(1000);
- animup.addAnimation(mytranslateanimup0);
- animup.addAnimation(mytranslateanimup1);
- mImgUp.startAnimation(animup);
- AnimationSet animdn = new AnimationSet(true);
- TranslateAnimation mytranslateanimdn0 = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,+0.5f);
- mytranslateanimdn0.setDuration(1000);
- TranslateAnimation mytranslateanimdn1 = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,-0.5f);
- mytranslateanimdn1.setDuration(1000);
- mytranslateanimdn1.setStartOffset(1000);
- animdn.addAnimation(mytranslateanimdn0);
- animdn.addAnimation(mytranslateanimdn1);
- mImgDn.startAnimation(animdn);
- }