android系统信息（内存、cpu、sd卡、电量、版本）获取
2017-01-10 18:58
826 查看
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) {
}
}
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
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;
}
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;
}
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;
}
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
}
};
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));
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;
}
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;
}
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);
}
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();
}
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。
---------------------------------------------------------------------------------------
ithougeAndroidandroid2 Comments发表评论
在android开发中，有时候我们想获取手机的一些硬件信息，比如android手机的总内存和可用内存大小。这个该如何实现呢？通过读取文件”/proc/meminfo”的信息能够获取手机Memory的总量，而通过ActivityManager.getMemoryInfo(ActivityManager.MemoryInfo)方法可以获取当前的可用Memory量。
bd15
“/proc/meminfo”文件记录了android手机的一些内存信息，在命令行窗口里输入”adb shell”，进入shell环境，输入”cat /proc/meminfo”即可在命令行里显示meminfo文件的内容，具体如下所示。
下面先对”/proc/meminfo”文件里列出的字段进行粗略解释：
MemTotal: 所有可用RAM大小。
MemFree: LowFree与HighFree的总和，被系统留着未使用的内存。
Buffers: 用来给文件做缓冲大小。
Cached: 被高速缓冲存储器（cache memory）用的内存的大小（等于diskcache minus SwapCache）。
SwapCached:被高速缓冲存储器（cache memory）用的交换空间的大小。已经被交换出来的内存，仍然被存放在swapfile中，用来在需要的时候很快的被替换而不需要再次打开I/O端口。
Active: 在活跃使用中的缓冲或高速缓冲存储器页面文件的大小，除非非常必要，否则不会被移作他用。
Inactive: 在不经常使用中的缓冲或高速缓冲存储器页面文件的大小，可能被用于其他途径。
SwapTotal: 交换空间的总大小。
SwapFree: 未被使用交换空间的大小。
Dirty: 等待被写回到磁盘的内存大小。
Writeback: 正在被写回到磁盘的内存大小。
AnonPages：未映射页的内存大小。
Mapped: 设备和文件等映射的大小。
Slab: 内核数据结构缓存的大小，可以减少申请和释放内存带来的消耗。
SReclaimable:可收回Slab的大小。
SUnreclaim：不可收回Slab的大小（SUnreclaim+SReclaimable＝Slab）。
PageTables：管理内存分页页面的索引表的大小。
NFS_Unstable:不稳定页表的大小。
要获取android手机总内存大小，只需读取”/proc/meminfo”文件的第1行，并进行简单的字符串处理即可。
JAVA代码如下：
运行结果如下：
令一种获取手机内存的方法：
大功告成，顺利读取android手机的总内存和当前的可用内存。这里只是抛砖引玉，大家可以举一反三，进行扩展。当然我们还可以通过读取”/proc/cupinfo”来获取android手机的CPU参数，通过读取”/proc/stat”文件来计算CPU的使用率，这里不再赘述。
http://gqdy365.iteye.com/blog/1066113
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) {
}
}
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
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;
}
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;
}
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;
}
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
}
};
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));
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;
}
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;
}
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);
}
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();
}
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。
---------------------------------------------------------------------------------------
Android获取手机总内存和可用内存
ithougeAndroidandroid2 Comments发表评论在android开发中，有时候我们想获取手机的一些硬件信息，比如android手机的总内存和可用内存大小。这个该如何实现呢？通过读取文件”/proc/meminfo”的信息能够获取手机Memory的总量，而通过ActivityManager.getMemoryInfo(ActivityManager.MemoryInfo)方法可以获取当前的可用Memory量。
bd15
“/proc/meminfo”文件记录了android手机的一些内存信息，在命令行窗口里输入”adb shell”，进入shell环境，输入”cat /proc/meminfo”即可在命令行里显示meminfo文件的内容，具体如下所示。
" style="font-size:1em]C:\Users\Figo>adb shell # cat /proc/meminfo cat /proc/meminfo MemTotal: 94096 kB MemFree: 1684 kB Buffers: 16 kB Cached: 27160 kB SwapCached: 0 kB Active: 35392 kB Inactive: 44180 kB Active(anon): 26540 kB Inactive(anon): 28244 kB Active(file): 8852 kB Inactive(file): 15936 kB Unevictable: 280 kB Mlocked: 0 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 52688 kB Mapped: 17960 kB Slab: 3816 kB SReclaimable: 936 kB SUnreclaim: 2880 kB PageTables: 5260 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 47048 kB Committed_AS: 1483784 kB VmallocTotal: 876544 kB VmallocUsed: 15456 kB VmallocChunk: 829444 kB #
下面先对”/proc/meminfo”文件里列出的字段进行粗略解释：
MemTotal: 所有可用RAM大小。
MemFree: LowFree与HighFree的总和，被系统留着未使用的内存。
Buffers: 用来给文件做缓冲大小。
Cached: 被高速缓冲存储器（cache memory）用的内存的大小（等于diskcache minus SwapCache）。
SwapCached:被高速缓冲存储器（cache memory）用的交换空间的大小。已经被交换出来的内存，仍然被存放在swapfile中，用来在需要的时候很快的被替换而不需要再次打开I/O端口。
Active: 在活跃使用中的缓冲或高速缓冲存储器页面文件的大小，除非非常必要，否则不会被移作他用。
Inactive: 在不经常使用中的缓冲或高速缓冲存储器页面文件的大小，可能被用于其他途径。
SwapTotal: 交换空间的总大小。
SwapFree: 未被使用交换空间的大小。
Dirty: 等待被写回到磁盘的内存大小。
Writeback: 正在被写回到磁盘的内存大小。
AnonPages：未映射页的内存大小。
Mapped: 设备和文件等映射的大小。
Slab: 内核数据结构缓存的大小，可以减少申请和释放内存带来的消耗。
SReclaimable:可收回Slab的大小。
SUnreclaim：不可收回Slab的大小（SUnreclaim+SReclaimable＝Slab）。
PageTables：管理内存分页页面的索引表的大小。
NFS_Unstable:不稳定页表的大小。
要获取android手机总内存大小，只需读取”/proc/meminfo”文件的第1行，并进行简单的字符串处理即可。
JAVA代码如下：
" style="font-size:1em]package com.figo.readsyememory;
import android.app.Activity;
import android.os.Bundle;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import android.app.ActivityManager;
import android.app.ActivityManager.MemoryInfo;
import android.content.Context;
import android.text.format.Formatter;
import android.util.Log;
import android.widget.TextView;
public class ReadSystemMemory extends Activity {
TextView tv = null;
private String getAvailMemory() {// 获取android当前可用内存大小
ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
MemoryInfo mi = new MemoryInfo();
am.getMemoryInfo(mi);//mi.availMem; 当前系统的可用内存
return Formatter.formatFileSize(getBaseContext(), mi.availMem);// 将获取的内存大小规格化
}
private String getTotalMemory() {
String str1 = "/proc/meminfo";// 系统内存信息文件
String str2; String[] arrayOfString;
long initial_memory = 0;
try {
FileReader localFileReader = new FileReader(str1);
BufferedReader localBufferedReader = new BufferedReader( localFileReader, 8192);
str2 = localBufferedReader.readLine();// 读取meminfo第一行，系统总内存大小
arrayOfString = str2.split("\\s+");
for (String num : arrayOfString) {
Log.i(str2, num + "\t");
}
initial_memory = Integer.valueOf(arrayOfString[1]).intValue() * 1024;// 获得系统总内存，单位是KB，乘以1024转换为Byte
localBufferedReader.close();
} catch (IOException e) { }
return Formatter.formatFileSize(getBaseContext(), initial_memory);// Byte转换为KB或者MB，内存大小规格化 }
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv = (TextView) findViewById(R.id.system_memory);
tv.setText("手机总内存: " + this.getTotalMemory() + ", " + "可用内存: "+ this.getAvailMemory());
}
}运行结果如下：
令一种获取手机内存的方法：
" style="font-size:1em]File path = Environment.getDataDirectory(); StatFs stat = new StatFs(path.getPath()); blockSize = stat.getBlockSize(); AllSize = stat.getBlockCount(); availableBlocks = stat.getAvailableBlocks(); long AvailableSize=((availableBlocks*blockSize)/1024)/1024; //便得到了可用内存大小 long TotalSize=((AllSize*blockSize)/1024)/1024; //便得到了总内存大小
大功告成，顺利读取android手机的总内存和当前的可用内存。这里只是抛砖引玉，大家可以举一反三，进行扩展。当然我们还可以通过读取”/proc/cupinfo”来获取android手机的CPU参数，通过读取”/proc/stat”文件来计算CPU的使用率，这里不再赘述。
http://gqdy365.iteye.com/blog/1066113
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