获取手机内存\可用内存\单个APP运行内存

 1 /** 手机总内存 */  2 private String getTotalMemory() {  3 // 系统内存信息文件  4 String str1 = "/proc/meminfo";  5  String str2;  6  String[] arrayOfString;  7 long initial_memory = 0;  8  9 try { 10 FileReader localFileReader = new FileReader(str1); 11 BufferedReader localBufferedReader = new BufferedReader( 12 localFileReader, 8192); 13 // 读取meminfo第一行，系统总内存大小 14 str2 = localBufferedReader.readLine(); 15 16 arrayOfString = str2.split("\\s+"); 17 for (String num : arrayOfString) { 18 Log.i(str2, num + "\t"); 19  } 20 // 获得系统总内存，单位是KB，乘以1024转换为Byte 21 initial_memory = Integer.valueOf(arrayOfString[1]).intValue() * 1024; 22  localBufferedReader.close(); 23 } catch (IOException e) { 24  } 25 // Byte转换为KB或者MB，内存大小规格化 26 return Formatter.formatFileSize(getBaseContext(), initial_memory); 27 }

 

1 /** 获取android当前可用内存大小 */ 2 private String getAvailMemory() { 3 ActivityManager am = (ActivityManager) getSystemService(
 Context.ACTIVITY_SERVICE); 4 MemoryInfo mi = new MemoryInfo(); 5  am.getMemoryInfo(mi); 6 // mi.availMem; 当前系统的可用内存 7 // 将获取的内存大小规格化 8 return Formatter.formatFileSize(getBaseContext(), mi.availMem); 9 }

 

 1 /** Android获取应用所占内存大小 */   2 private void getRunningAppProcessInfo() {  3 ActivityManager mActivityManager = (ActivityManager) getSystemService(  4  Context.ACTIVITY_SERVICE);  5  6 // 获得系统里正在运行的所有进程  7 List<RunningAppProcessInfo> runningAppProcessesList = mActivityManager  8  .getRunningAppProcesses();  9 10 for (RunningAppProcessInfo runningAppProcessInfo : runningAppProcessesList) { 11 // 进程ID号 12 int pid = runningAppProcessInfo.pid; 13 // 用户ID 14 int uid = runningAppProcessInfo.uid; 15 // 进程名 16 String processName = runningAppProcessInfo.processName; 17 // 占用的内存 18 int[] pids = new int[] { pid }; 19 Debug.MemoryInfo[] memoryInfo = mActivityManager 20  .getProcessMemoryInfo(pids); 21 int memorySize = memoryInfo[0].dalvikPrivateDirty; 22 23 Log.i(TAG, "processName=" + processName + ",pid=" + pid + ",uid=" 24 + uid + ",memorySize=" + memorySize + "kb"); 25  } 26 }

 

 1 /**  2  * 获取单个 app 内存限制大小  3  * 返回以 M 为单位的数字，  4  * 可能在不同的平台或者设备上值都不太一样  5 */  6 private void test01() {  7 ActivityManager activityManager2 = (ActivityManager) getSystemService(  8  Context.ACTIVITY_SERVICE);  9  activityManager2.getMemoryClass(); 10 }