SD卡工具类↙↙↙

// 判断SD卡是否被挂载

public static boolean isSDCardMounted() {

// return Environment.getExternalStorageState().equals("mounted");

    return Environment.getExternalStorageState().equals(

Environment.MEDIA_MOUNTED);

}

// 获取SD卡的跟路径

public static String getSDCardBaseDir() {

if (isSDCardMounted()) {

return Environment.getExternalStorageDirectory().getAbsolutePath();

}

return "";

}

// 获取SD卡的完整空间大小,返回MB

public static long getSDCardSize() {

if (isSDCardMounted()) {

StatFs fs =new StatFs(getSDCardBaseDir());

int count = fs.getBlockCount();

int size = fs.getBlockSize();

return count * size /1024 /1024;

}

return 0;

}

// 获取SD卡的剩余空间大小,返回MB

public static long getSDCardFreeSize() {

if (isSDCardMounted()) {

StatFs fs =new StatFs(getSDCardBaseDir());

int count = fs.getFreeBlocks();

int size = fs.getBlockSize();

return count * size /1024 /1024;

}

return 0;

}

// 获取SD卡的可用空间大小,返回MB

public static long getSDCardAvailableSize() {

if (isSDCardMounted()) {

StatFs fs =new StatFs(getSDCardBaseDir());

int count = fs.getAvailableBlocks();

int size = fs.getBlockSize();

return count * size /1024 /1024;

}

return 0;

}

// 往SD卡的公有目录下保存文件

public static boolean saveFileToSDCardPublicDir(byte[] data, String type,

String fileName) {

BufferedOutputStream bos =null;

if (isSDCardMounted()) {

File file = Environment

.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES);

// Log.i("SDCardHelper", "--->" + file.getAbsolutePath());

        try {

bos =new BufferedOutputStream(new FileOutputStream(new File(

file, fileName)));

bos.write(data);

bos.flush();

return true;

}catch (Exception e) {

e.printStackTrace();

}finally {

try {

if (bos !=null) {

bos.close();

}

}catch (IOException e) {

e.printStackTrace();

}

}

}

return false;

}

// 往SD卡的私有Files目录下保存文件

public static boolean saveFileToSDCardPrivateFilesDir(byte[] data,

String type, String fileName, Context context) {

BufferedOutputStream bos =null;

if (isSDCardMounted()) {

File file = context.getExternalFilesDir(type);

try {

bos =new BufferedOutputStream(new FileOutputStream(new File(

file, fileName)));

bos.write(data);

bos.flush();

return true;

}catch (Exception e) {

e.printStackTrace();

}finally {

try {

if (bos !=null) {

bos.close();

}

}catch (IOException e) {

e.printStackTrace();

}

}

}

return false;

}

// 往SD卡的私有Cache目录下保存文件

public static boolean saveFileToSDCardPrivateCacheDir(byte[] data,

String fileName, Context context) {

BufferedOutputStream bos =null;

if (isSDCardMounted()) {

File file = context.getExternalCacheDir();

try {

bos =new BufferedOutputStream(new FileOutputStream(new File(

file, fileName)));

bos.write(data);

bos.flush();

return true;

}catch (Exception e) {

e.printStackTrace();

}finally {

try {

if (bos !=null) {

bos.close();

}

}catch (IOException e) {

e.printStackTrace();

}

}

}

return false;

}

// 往SD卡的私有Cache目录下保存文件

public static boolean saveFileToSDCardPrivateCacheDir(InputStream in,

String fileName, Context context) {

BufferedOutputStream bos =null;

BufferedInputStream bis=null;

if (isSDCardMounted()) {

File file = context.getExternalCacheDir();

String absolutePath = context.getExternalCacheDir().getAbsolutePath();

Log.e("TAG","saveFileToSDCardPrivateCacheDir: "+absolutePath );

try {

bis=new BufferedInputStream(in);

bos =new BufferedOutputStream(new FileOutputStream(new File(

file, fileName)));

byte[] buffer=new byte[1024*8];

int c=0;

while((c=bis.read(buffer))!=-1){

bos.write(buffer,0,c);

bos.flush();

}

return true;

}catch (Exception e) {

e.printStackTrace();

}finally {

try {

if (bos !=null) {

bos.close();

}

if(bis!=null){

bis.close();

}

}catch (IOException e) {

e.printStackTrace();

}

}

}

return false;

}

// 往SD卡的自定义目录下保存文件

public static boolean saveFileToSDCardCustomDir(byte[] data, String dir,

String fileName) {

BufferedOutputStream bos =null;

if (isSDCardMounted()) {

File file =new File(getSDCardBaseDir() + File.separator + dir);

if (!file.exists()) {

file.mkdirs();

}

try {

bos =new BufferedOutputStream(new FileOutputStream(new File(

file, fileName)));

bos.write(data);

bos.flush();

return true;

}catch (Exception e) {

e.printStackTrace();

}finally {

try {

if (bos !=null) {

bos.close();

}

}catch (IOException e) {

e.printStackTrace();

}

}

}

return false;

}

// 从SD卡获取文件

public static byte[] loadFileFromSDCard(String filePath) {

BufferedInputStream bis =null;

ByteArrayOutputStream baos =new ByteArrayOutputStream();

try {

bis =new BufferedInputStream(new FileInputStream(

new File(filePath)));

byte[] buffer =new byte[1024 *8];

int c =0;

while ((c = bis.read(buffer)) != -1) {

baos.write(buffer,0, c);

baos.flush();

}

return baos.toByteArray();

}catch (Exception e) {

e.printStackTrace();

}finally {

try {

if (bis !=null) {

bis.close();

}

if (baos !=null) {

baos.close();

}

}catch (IOException e) {

e.printStackTrace();

}

}

return null;

}

// 获取SD卡公有目录的路径

public static String getSDCardPublicDir(String type) {

return Environment.getExternalStoragePublicDirectory(type)

.getAbsolutePath();

}

// 获取SD卡私有Cache目录的路径

public static String getSDCardPrivateCacheDir(Context context) {

return context.getExternalCacheDir().getAbsolutePath();

}

// 获取SD卡私有Files目录的路径

public static String getSDCardPrivateFilesDir(Context context, String type) {

return context.getExternalFilesDir(type).getAbsolutePath();

}

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