/*********************************************** * 內存管理工具 * * @author chen.lin * @version 1.0 ************************************************/public class MemoryManager {  private static final String TAG = "MemoryManager";  private static final int MAXMEMORY=300*1024*1024;//程序運行的最大內存 模擬器(0-16m)  /**   * 判斷系統是否在低內存下運行   * @param context   * @return   */  public static boolean hasAcailMemory() {    // 獲取手機內部空間大小    long memory = getAvailableInternalMemorySize();    Log.i(TAG, memory+"");    if (memory < MAXMEMORY) {      //應用將處于低內存狀態下運行      return false;    } else {      return true;    }  }  /**   * 獲取手機內部可用空間大小   *   * @return   */  @SuppressWarnings("deprecation")  public static long getAvailableInternalMemorySize() {    File path = Environment.getDataDirectory();// 獲取 Android 數據目錄    StatFs stat = new StatFs(path.getPath());// 一個模擬linux的df命令的一個類,獲得SD卡和手機內存的使用情況    long blockSize = stat.getBlockSize();// 返回 Int ，大小，以字節為單位，一個文件系統    long availableBlocks = stat.getAvailableBlocks();// 返回 Int ，獲取當前可用的存儲空間    return availableBlocks * blockSize;  }  /**   * 獲取手機內部空間大小   *   * @return   */  @SuppressWarnings("deprecation")  public static long getTotalInternalMemorySize() {    File path = Environment.getDataDirectory();    StatFs stat = new StatFs(path.getPath());    long blockSize = stat.getBlockSize();    long totalBlocks = stat.getBlockCount();// 獲取該區域可用的文件系統數    return totalBlocks * blockSize;  }  /**   * 獲取手機外部可用空間大小   *   * @return   */  @SuppressWarnings("deprecation")  public static long getAvailableExternalMemorySize() {    if (externalMemoryAvailable()) {      File path = Environment.getExternalStorageDirectory();      StatFs stat = new StatFs(path.getPath());      long blockSize = stat.getBlockSize();      long availableBlocks = stat.getAvailableBlocks();      return availableBlocks * blockSize;    } else {      throw new RuntimeException("Don't have sdcard.");    }  }  /**   * 獲取手機外部空間大小   *   * @return   */  @SuppressWarnings("deprecation")  public static long getTotalExternalMemorySize() {    if (externalMemoryAvailable()) {      File path = Environment.getExternalStorageDirectory();// 獲取外部存儲目錄即 SDCard      StatFs stat = new StatFs(path.getPath());      long blockSize = stat.getBlockSize();      long totalBlocks = stat.getBlockCount();      return totalBlocks * blockSize;    } else {      throw new RuntimeException("Don't have sdcard.");    }  }  /**   * 外部存儲是否可用   *   * @return   */  public static boolean externalMemoryAvailable() {    return android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);  }}