android系统信息（内存、cpu、sd卡、电量、版本）获取
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
public void getTotalMemory() {
String str1 = \"/proc/meminfo\";
String str2=\"\";
try {
FileReader fr = new FileReader(str1);
BufferedReader localBufferedReader = new BufferedReader(fr,
8192);
while ((str2 = localBufferedReader.readLine()) != null) {
Log.i(TAG, \"---\" + str2);
}
} catch (IOException e) {
}
}
运行信息如下：
Java代码
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemTotal: 204876
kB
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemFree: 4596
kB
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Buffers: 16020 kB
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Cached: 82508
kB
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapCached: 64
kB
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Active: 137104 kB
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Inactive: 41056 kB
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapTotal: 65528
kB
05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SwapFree: 65368
kB
05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Dirty: 88 kB
05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Writeback: 0 kB
05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---AnonPages: 79672
kB
05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Mapped: 38296
kB
05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Slab: 5768 kB
05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SReclaimable: 1856
kB
05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---SUnreclaim: 3912
kB
05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---PageTables: 8184
kB
05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---NFS_Unstable: 0
kB
05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Bounce: 0
kB
05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---CommitLimit: 167964
kB
05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Committed_AS: 11771920
kB
05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocTotal: 761856
kB
05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocUsed: 83656
kB
05-30 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
public long getAvailMemory() {
ActivityManager am =
(ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);
ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
am.getMemoryInfo(mi);
return mi.availMem;
}
二、Rom大小
Java代码
public long[] getRomMemroy() {
long[] romInfo = new long[2];
//Total rom memory
romInfo[0] = getTotalInternalMemorySize();
//Available rom memory
File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
romInfo[1] = blockSize * availableBlocks;
getVersion();
return romInfo;
}
public long getTotalInternalMemorySize() {
File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long totalBlocks = stat.getBlockCount();
return totalBlocks * 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
public long[] getSDCardMemory() {
long[] sdCardInfo=new long[2];
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
File sdcardDir = Environment.getExternalStorageDirectory();
StatFs sf = new StatFs(sdcardDir.getPath());
long bSize = sf.getBlockSize();
long bCount = sf.getBlockCount();
long availBlocks = sf.getAvailableBlocks();
sdCardInfo[0] = bSize * bCount;//总大小
sdCardInfo[1] = bSize * availBlocks;//可用大小
}
return sdCardInfo;
}
注意类型，不然相乘之后会有溢出。
四、电池电量
Java代码
private BroadcastReceiver batteryReceiver=new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
int level = 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, new
IntentFilter(Intent.ACTION_BATTERY_CHANGED));
五、CPU信息
Java代码
public String[] getCpuInfo() {
String str1 = \"/proc/cpuinfo\";
String str2=\"\";
String[] cpuInfo={\"\",\"\"};
String[] arrayOfString;
try {
FileReader fr = new FileReader(str1);
BufferedReader localBufferedReader = new BufferedReader(fr, 8192);
str2 = localBufferedReader.readLine();
arrayOfString = str2.split(\"\\\\s+\");
for (int i = 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 (IOException e) {
}
return cpuInfo;
}
/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
public String[] getVersion(){
String[] version={\"null\",\"null\",\"null\",\"null\"};
String str1 = \"/proc/version\";
String str2;
String[] arrayOfString;
try {
FileReader localFileReader = new FileReader(str1);
BufferedReader localBufferedReader = new BufferedReader(
localFileReader, 8192);
str2 = localBufferedReader.readLine();
arrayOfString = str2.split(\"\\\\s+\");
version[0]=arrayOfString[2];//KernelVersion
localBufferedReader.close();
} catch (IOException e) {
}
version[1] = Build.VERSION.RELEASE;// firmware version
version[2]=Build.MODEL;//model
version[3]=Build.DISPLAY;//system version
return version;
}
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
public String[] getOtherInfo(){
String[] other={\"null\",\"null\"};
WifiManager wifiManager = (WifiManager)
mContext.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
if(wifiInfo.getMacAddress()!=null){
other[0]=wifiInfo.getMacAddress();
} else {
other[0] = \"Fail\";
}
other[1] = getTimes();
return other;
}
private String getTimes() {
long ut = SystemClock.elapsedRealtime() / 1000;
if (ut == 0) {
ut = 1;
}
int m = (int) ((ut / 60) % 60);
int h = (int) ((ut / 3600));
return h + \" \" + 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
public String formatSize(long size) {
String suffix = null;
float fSize=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.DecimalFormat df = new java.text.DecimalFormat(\"#0.00\");
StringBuilder resultBuffer = new StringBuilder(df.format(fSize));
if (suffix != null)
resultBuffer.append(suffix);
return resultBuffer.toString();
}
保留两位小数。
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