android系统信息（内存，cpu，sd卡，电量，版本）的获取

出处：http://gqdy365.iteye.com/blog/1066113

一、内存（ram）：
android的总内存大小信息存放在系统的/proc/meminfo文件里面，可以通过读取这个文件来获取这些信息：

Java代码

publicvoidgetTotalMemory(){
Stringstr1="/proc/meminfo";
Stringstr2="";
try{
FileReaderfr=newFileReader(str1);
BufferedReaderlocalBufferedReader=newBufferedReader(fr,8192);
while((str2=localBufferedReader.readLine())!=null){
Log.i(TAG,"---"+str2);
}
}catch(IOExceptione){
}
}

运行信息如下：

Java代码

05-3008:05:14.807:INFO/-SystemInfo-(1519):---MemTotal:204876kB
05-3008:05:14.807:INFO/-SystemInfo-(1519):---MemFree:4596kB
05-3008:05:14.807:INFO/-SystemInfo-(1519):---Buffers:16020kB
05-3008:05:14.807:INFO/-SystemInfo-(1519):---Cached:82508kB
05-3008:05:14.807:INFO/-SystemInfo-(1519):---SwapCached:64kB
05-3008:05:14.807:INFO/-SystemInfo-(1519):---Active:137104kB
05-3008:05:14.807:INFO/-SystemInfo-(1519):---Inactive:41056kB
05-3008:05:14.807:INFO/-SystemInfo-(1519):---SwapTotal:65528kB
05-3008:05:14.817:INFO/-SystemInfo-(1519):---SwapFree:65368kB
05-3008:05:14.817:INFO/-SystemInfo-(1519):---Dirty:88kB
05-3008:05:14.817:INFO/-SystemInfo-(1519):---Writeback:0kB
05-3008:05:14.817:INFO/-SystemInfo-(1519):---AnonPages:79672kB
05-3008:05:14.817:INFO/-SystemInfo-(1519):---Mapped:38296kB
05-3008:05:14.817:INFO/-SystemInfo-(1519):---Slab:5768kB
05-3008:05:14.817:INFO/-SystemInfo-(1519):---SReclaimable:1856kB
05-3008:05:14.827:INFO/-SystemInfo-(1519):---SUnreclaim:3912kB
05-3008:05:14.827:INFO/-SystemInfo-(1519):---PageTables:8184kB
05-3008:05:14.827:INFO/-SystemInfo-(1519):---NFS_Unstable:0kB
05-3008:05:14.827:INFO/-SystemInfo-(1519):---Bounce:0kB
05-3008:05:14.827:INFO/-SystemInfo-(1519):---CommitLimit:167964kB
05-3008:05:14.827:INFO/-SystemInfo-(1519):---Committed_AS:11771920kB
05-3008:05:14.827:INFO/-SystemInfo-(1519):---VmallocTotal:761856kB
05-3008:05:14.827:INFO/-SystemInfo-(1519):---VmallocUsed:83656kB
05-3008:05:14.827:INFO/-SystemInfo-(1519):---VmallocChunk:674820kB

05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemTotal:       204876 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemFree:          4596 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Buffers:         16020 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Cached:          82508 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapCached:         64 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Active:         137104 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Inactive:        41056 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapTotal:       65528 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SwapFree:        65368 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Dirty:              88 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Writeback:           0 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---AnonPages:       79672 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Mapped:          38296 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Slab:             5768 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SReclaimable:     1856 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---SUnreclaim:       3912 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---PageTables:       8184 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---NFS_Unstable:        0 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Bounce:              0 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---CommitLimit:    167964 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Committed_AS: 11771920 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocTotal:   761856 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocUsed:     83656 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocChunk:   674820 kB

第一行是总内存大小(即用户可以使用的ram的大小)！其他各项的介绍大家可以看这儿：
http://bg135.com/android-phones-to-get-the-total-memory-and-available-memory.html

获取当前剩余内存(ram)大小的方法：
Java代码

publiclonggetAvailMemory(){
ActivityManageram=(ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);
ActivityManager.MemoryInfomi=newActivityManager.MemoryInfo();
am.getMemoryInfo(mi);
returnmi.availMem;
}

二、Rom大小

Java代码

publiclong[]getRomMemroy(){
long[]romInfo=newlong[2];
//Totalrommemory
romInfo[0]=getTotalInternalMemorySize();
//Availablerommemory
Filepath=Environment.getDataDirectory();
StatFsstat=newStatFs(path.getPath());
longblockSize=stat.getBlockSize();
longavailableBlocks=stat.getAvailableBlocks();
romInfo[1]=blockSize*availableBlocks;
getVersion();
returnromInfo;
}
publiclonggetTotalInternalMemorySize(){
Filepath=Environment.getDataDirectory();
StatFsstat=newStatFs(path.getPath());
longblockSize=stat.getBlockSize();
longtotalBlocks=stat.getBlockCount();
returntotalBlocks*blockSize;
}

注意类型，不然相乘之后会有溢出。可用内部存储的大小不能通过getRootDirectory();
取得，之前网上传的很多都是用getRootDirectory()取得的，我测试之后发现取得的数值不对。要根据getDataDirectory();
取得。

三、sdCard大小
Java代码

publiclong[]getSDCardMemory(){
long[]sdCardInfo=newlong[2];
Stringstate=Environment.getExternalStorageState();
if(Environment.MEDIA_MOUNTED.equals(state)){
FilesdcardDir=Environment.getExternalStorageDirectory();
StatFssf=newStatFs(sdcardDir.getPath());
longbSize=sf.getBlockSize();
longbCount=sf.getBlockCount();
longavailBlocks=sf.getAvailableBlocks();
sdCardInfo[0]=bSize*bCount;//总大小
sdCardInfo[1]=bSize*availBlocks;//可用大小
}
returnsdCardInfo;
}

注意类型，不然相乘之后会有溢出。

四、电池电量

Java代码

privateBroadcastReceiverbatteryReceiver=newBroadcastReceiver(){
@Override
publicvoidonReceive(Contextcontext,Intentintent){
intlevel=intent.getIntExtra("level",0);
//level加%就是当前电量了
}
};

然后在activity的oncreate()方法中注册
Java代码

registerReceiver(batteryReceiver,newIntentFilter(Intent.ACTION_BATTERY_CHANGED));

五、CPU信息

Java代码

publicString[]getCpuInfo(){
Stringstr1="/proc/cpuinfo";
Stringstr2="";
String[]cpuInfo={"",""};
String[]arrayOfString;
try{
FileReaderfr=newFileReader(str1);
BufferedReaderlocalBufferedReader=newBufferedReader(fr,8192);
str2=localBufferedReader.readLine();
arrayOfString=str2.split("\\s+");
for(inti=2;i<arrayOfString.length;i++){
cpuInfo[0]=cpuInfo[0]+arrayOfString[i]+"";
}
str2=localBufferedReader.readLine();
arrayOfString=str2.split("\\s+");
cpuInfo[1]+=arrayOfString[2];
localBufferedReader.close();
}catch(IOExceptione){
}
returncpuInfo;
}

/proc/cpuinfo文件中第一行是CPU的型号，第二行是CPU的频率，可以通过读文件，读取这些数据！

六、系统的版本信息：
Java代码

publicString[]getVersion(){
String[]version={"null","null","null","null"};
Stringstr1="/proc/version";
Stringstr2;
String[]arrayOfString;
try{
FileReaderlocalFileReader=newFileReader(str1);
BufferedReaderlocalBufferedReader=newBufferedReader(
localFileReader,8192);
str2=localBufferedReader.readLine();
arrayOfString=str2.split("\\s+");
version[0]=arrayOfString[2];//KernelVersion
localBufferedReader.close();
}catch(IOExceptione){
}
version[1]=Build.VERSION.RELEASE;//firmwareversion
version[2]=Build.MODEL;//model
version[3]=Build.DISPLAY;//systemversion
returnversion;
}

版本信息里面还包括型号等信息。

七、MAC地址和开机时间：

Java代码

publicString[]getOtherInfo(){
String[]other={"null","null"};
WifiManagerwifiManager=(WifiManager)mContext.getSystemService(Context.WIFI_SERVICE);
WifiInfowifiInfo=wifiManager.getConnectionInfo();
if(wifiInfo.getMacAddress()!=null){
other[0]=wifiInfo.getMacAddress();
}else{
other[0]="Fail";
}
other[1]=getTimes();
returnother;
}
privateStringgetTimes(){
longut=SystemClock.elapsedRealtime()/1000;
if(ut==0){
ut=1;
}
intm=(int)((ut/60)%60);
inth=(int)((ut/3600));
returnh+""+mContext.getString(R.string.info_times_hour)+m+""
+mContext.getString(R.string.info_times_minute);
}

最后贴一个格式化数据的方法：

Java代码

publicStringformatSize(longsize){
Stringsuffix=null;
floatfSize=0;
if(size>=1024){
suffix="KB";
fSize=size/1024;
if(fSize>=1024){
suffix="MB";
fSize/=1024;
}
if(fSize>=1024){
suffix="GB";
fSize/=1024;
}
}else{
fSize=size;
}
java.text.DecimalFormatdf=newjava.text.DecimalFormat("#0.00");
StringBuilderresultBuffer=newStringBuilder(df.format(fSize));
if(suffix!=null)
resultBuffer.append(suffix);
returnresultBuffer.toString();
}

保留两位小数。

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