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Byte21             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ID14       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 = mActivityManager20              .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  }