Android 9(4)

StorageManager mStorageManager = (StorageManager) mContext.getSystemService(Context.STORAGE_SERVICE);

Class<?> storageVolumeClazz = null;

try {

storageVolumeClazz = Class.forName(“android.os.storage.StorageVolume”);

Method getVolumeList = mStorageManager.getClass().getMethod(“getVolumeList”);

Method getPath = storageVolumeClazz.getMethod(“getPath”);

Method isRemovable = storageVolumeClazz.getMethod(“isRemovable”);

Method getState = storageVolumeClazz.getMethod(“getState”);

Object result = getVolumeList.invoke(mStorageManager);

final int length = Array.getLength(result);

for (int i = 0; i < length; i++) {

Object storageVolumeElement = Array.get(result, i);

String path = (String) getPath.invoke(storageVolumeElement);

boolean removable = (Boolean) isRemovable.invoke(storageVolumeElement);

String state = (String) getState.invoke(storageVolumeElement);

if (removable && state.equals(Environment.MEDIA_MOUNTED)) {

isMounted =removable ;

break;

}

}

} catch (ClassNotFoundException e) {

e.printStackTrace();

} catch (InvocationTargetException e) {

e.printStackTrace();

} catch (NoSuchMethodException e) {

e.printStackTrace();

} catch (IllegalAccessException e) {

e.printStackTrace();

}

return isMounted;

}

获取手机内部剩余存储空间

/**

• 获取手机内部剩余存储空间

• @return

*/

public static long getAvailableInternalMemorySize() {

File path = Environment.getDataDirectory();

StatFs stat = new StatFs(path.getPath());

long blockSize = stat.getBlockSize();

long availableBlocks = stat.getAvailableBlocks();

return availableBlocks * blockSize;

}

获取手机内部总的存储空间

/**

• 获取手机内部总的存储空间

• @return

*/

public static long getTotalInternalMemorySize() {

File path = Environment.getDataDirectory();

StatFs stat = new StatFs(path.getPath());

long blockSize = stat.getBlockSize();

long totalBlocks = stat.getBlockCount();

return totalBlocks * blockSize;

}

获取SDCARD剩余存储空间

/**

• 获取SDCARD剩余存储空间

• @return

*/

public static long getAvailableExternalMemorySize() {

if (externalMemoryAvailable()) {

// File path = Environment.getExternalStorageDirectory();

// StatFs stat = new StatFs(path.getPath());

StatFs stat = new StatFs(getStoragePath(context,true));//path.getPath()

long blockSize = stat.getBlockSize();

long availableBlocks = stat.getAvailableBlocks();

return availableBlocks * blockSize;

} else {

return ERROR;

}

}

获取SDCARD总的存储空间

/**

• 获取SDCARD总的存储空间

• @return

*/

public static long getTotalExternalMemorySize() {

if (externalMemoryAvailable()) {

// File path = Environment.getExternalStorageDirectory();

// StatFs stat = new StatFs(path.getPath());

StatFs stat = new StatFs(getStoragePath(context,true));//path.getPath()

long blockSize = stat.getBlockSize();

long totalBlocks = stat.getBlockCount();

return totalBlocks * blockSize;

} else {

return ERROR;

}

}

获取系统总内存

/**

• 获取系统总内存

• @param context 可传入应用程序上下文。

• @return 总内存大单位为B。

*/

public static long getTotalMemorySize(Context context) {

String dir = “/proc/meminfo”;

try {

FileReader fr = new FileReader(dir);

BufferedReader br = new BufferedReader(fr, 2048);

String memoryLine = br.readLine();

String subMemoryLine = memoryLine.substring(memoryLine.indexOf(“MemTotal:”));

br.close();

return Integer.parseInt(subMemoryLine.replaceAll(“\D+”, “”)) * 1024l;

} catch (IOException e) {

e.printStackTrace();

}

return 0;

}

获取当前可用内存

/**

• 获取当前可用内存，返回数据以字节为单位。

• @param context 可传入应用程序上下文。

• @return 当前可用内存单位为B。

*/

public static long getAvailableMemory(Context context) {

ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();

am.getMemoryInfo(memoryInfo);

return memoryInfo.availMem;

}

private static DecimalFormat fileIntegerFormat = new DecimalFormat(“#0”);

private static DecimalFormat fileDecimalFormat = new DecimalFormat(“#0.#”);

单位换算

/**

• 单位换算

• @param size 单位为B

• @param isInteger 是否返回取整的单位

• @return 转换后的单位

*/

public static String formatFileSize(long size, boolean isInteger) {

DecimalFormat df = isInteger ? fileIntegerFormat : fileDecimalFormat;

String fileSizeString = “0M”;

if (size < 1024 && size > 0) {

fileSizeString = df.format((double) size) + “B”;

} else if (size < 1024 * 1024) {

fileSizeString = df.format((double) size / 1024) + “K”;

} else if (size < 1024 * 1024 * 1024) {

fileSizeString = df.format((double) size / (1024 * 1024)) + “M”;

} else {

fileSizeString = df.format((double) size / (1024 * 1024 * 1024)) + “G”;

}

return fileSizeString;

}

}

SD卡热插拔监听

//初始化receiver

protected void onResume()

{

super.onResume();

IntentFilter intentFilter = new IntentFilter(

Intent.ACTION_MEDIA_MOUNTED);

intentFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);

intentFilter.addAction(Intent.ACTION_MEDIA_EJECT);

intentFilter.addDataScheme(“file”);

// install an intent filter to receive SD card related events.

mReceiver = new BroadcastReceiver()

{

public void onReceive(Context arg0, Intent arg1)

{

onReceiveSdCardBroadCast(arg1);

}

};

registerReceiver(mReceiver, intentFilter);