如何获取网络延迟,手机电量

网络延迟获取

这个其实很简单,在客户端发送消息的时候,记录一个时间start_timeStamp,消息返回的时候,记录一个时间end_timeStamp,end_timeStamp-start_timeStamp得到的就是本条消息的网络延迟(时间单位要精确到毫秒)。对于手机游戏,显示网络延迟没有pc端的需求刚,所以不去高频率获取延迟从而得到高精确的延迟数值。可以固定几秒获取一次(心跳包可以做这个工作),或者在发送接受消息和接受消息的总接口进行计算,记录一下网络延迟,每发送一个消息就更新一次网络延迟。
这样下来,没有平台之分,android,ios各种系统基本上都可以,简单又方便。

手机电量获取

Android

先上代码
声明变量

private BroadcastReceiver batteryLevelRcvr;
private IntentFilter batteryLevelFilter;
public static String batteryLevel;

注册电量监听

private void monitorBatteryState() {
        batteryLevelRcvr = new BroadcastReceiver() {
            public void onReceive(Context context, Intent intent) {
                StringBuilder sb = new StringBuilder();
                int rawlevel = intent.getIntExtra("level", -1);
                int scale = intent.getIntExtra("scale", -1);
                if (rawlevel >= 0 && scale > 0) {
                    batteryLevel = ((rawlevel * 100) / scale) + "";
                }

            }
        };
        batteryLevelFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
        registerReceiver(batteryLevelRcvr, batteryLevelFilter);
    }

当程序退出的时候,我们要取消对电池电量广播的监听,在Activity的onDestroy方法里添加如下代码:

unregisterReceiver(batteryLevelRcvr)

这里面主要的是BroadcastReceiver和Intent.ACTION_BATTERY_CHANGED。安卓没办法直接进行电量的获取,它的电量变化以广播的形式发送出来,我们使用BroadcastReceiver接收广播,使用Intent.ACTION_BATTERY_CHANGED来过滤出电量变化的广播。这样我们就得到了Android手机的电量。

IOS

导入文件

#import "IOPSKeys.h"  
#import "IOPowerSources.h" 

实现代码

+(double)getCurrentBatteryLevel  
{  

    //Returns a blob of Power Source information in an opaque CFTypeRef.  
    CFTypeRef blob = IOPSCopyPowerSourcesInfo();  

    //Returns a CFArray of Power Source handles, each of type CFTypeRef.  
    CFArrayRef sources = IOPSCopyPowerSourcesList(blob);  

    CFDictionaryRef pSource = NULL;  
    const void *psValue;  

    //Returns the number of values currently in an array.  
    int numOfSources = CFArrayGetCount(sources);  

    //Error in CFArrayGetCount  
    if (numOfSources == 0)  
    {  
        NSLog(@"Error in CFArrayGetCount");  
        return -1.0f;  
    }  

    //Calculating the remaining energy  
    for (int i = 0 ; i < numOfSources ; i++)  
    {  
        //Returns a CFDictionary with readable information about the specific power source.  
        pSource = IOPSGetPowerSourceDescription(blob, CFArrayGetValueAtIndex(sources, i));  
        if (!pSource)  
        {  
            NSLog(@"Error in IOPSGetPowerSourceDescription");  
            return -1.0f;  
        }  
        psValue = (CFStringRef)CFDictionaryGetValue(pSource, CFSTR(kIOPSNameKey));  

        int curCapacity = 0;  
        int maxCapacity = 0;  
        double percent;  

        psValue = CFDictionaryGetValue(pSource, CFSTR(kIOPSCurrentCapacityKey));  
        CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &curCapacity);  

        psValue = CFDictionaryGetValue(pSource, CFSTR(kIOPSMaxCapacityKey));  
        CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &maxCapacity);  

        percent = ((double)curCapacity/(double)maxCapacity * 100.0f);  

        return percent;  
    }  
    return -1.0f;  
}  

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