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zhaoduo_79490175:
zhaoduo_79490175 写道任何事情都不是绝对的。照 ...
创业失败满是辛酸泪,特分享一下 -
zhaoduo_79490175:
任何事情都不是绝对的。照你这样说,人都不去创业了?怕前怕后的, ...
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java88:
楼主太偏激,创业才是王道。你想想,你45岁以后,哪个企业要你去 ...
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风云无浪:
我一个朋友搞的淘宝返利网站,现在赚的风生水起啊
创业失败满是辛酸泪,特分享一下 -
csc365kl:
需要细分 抓时机 抢先机
创业失败满是辛酸泪,特分享一下
Android 系统信息获取(CPU,RAM,ROM,Battery,SD-card,版本等)
下文地址: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:
- 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) {
- }
- }
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:
- 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
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:
- public long getAvailMemory() {
- ActivityManager am = (ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);
- ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
- am.getMemoryInfo(mi);
- return mi.availMem;
- }
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
- 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;
- }
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
- 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;
- }
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
- 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
- }
- };
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
registerReceiver(batteryReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
五、CPU信息
- 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;
- }
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:
- 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;
- }
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:
- 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);
- }
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:
- 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();
- }
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
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。
“/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。
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:
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:
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。
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