內存（ram）
android的總內存大小信息存放在系統的/proc/meminfo文件裡面，可以通過讀取這個文件來獲取這些信息：
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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) {
}
}
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運行信息如下：
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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
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第一行是總內存大小(即用戶可以使用的ram的大小)！
獲取當前剩余內存(ram)大小的方法：
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public long getAvailMemory() {
ActivityManager am = (ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);
ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
am.getMemoryInfo(mi);
return mi.availMem;
}
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Rom大小
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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;
}
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注意類型，不然相乘之後會有溢出。可用內部存儲的大小不能通過getRootDirectory();取得，之前網上傳的很多都是用getRootDirectory()取得的，我測試之後發現取得的數值不對。要根據getDataDirectory();取得。
SDcard大小
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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;//總大小
sdCardInfo[1] = bSize * availBlocks;//可用大小
}
return sdCardInfo;
}
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注意類型，不然相乘之後會有溢出。
電池電量
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private BroadcastReceiver batteryReceiver=new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
int level = intent.getIntExtra("level", 0);
// level加%就是當前電量了
}
};
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然後在activity的oncreate()方法中注冊
registerReceiver(batteryReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
CPU信息
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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;
}
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/proc/cpuinfo文件中第一行是CPU的型號，第二行是CPU的頻率，可以通過讀文件，讀取這些數據！
系統的版本信息
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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;
}
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版本信息裡面還包括型號等信息。
MAC地址和開機時間
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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);
}
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