如何正确获得Android内外SD卡路径

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获取手机自身内存路径

/

public static String getPhoneCardPath(){

return EnvironmentgetDataDirectory()getPath();

}

/

获取sd卡路径

双sd卡时，根据”设置“里面的数据存储位置选择，获得的是内置sd卡或外置sd卡

@return

/

public static String getNormalSDCardPath(){

return EnvironmentgetExternalStorageDirectory()getPath();

}

/

获取sd卡路径

双sd卡时，获得的是外置sd卡

@return

/

public static String getSDCardPath() {

String cmd = "cat /proc/mounts";

Runtime run = RuntimegetRuntime();// 返回与当前 Java 应用程序相关的运行时对象

BufferedInputStream in=null;

BufferedReader inBr=null;

try {

Process p = runexec(cmd);// 启动另一个进程来执行命令

in = new BufferedInputStream(pgetInputStream());

inBr = new BufferedReader(new InputStreamReader(in));

String lineStr;

while ((lineStr = inBrreadLine()) != null) {

// 获得命令执行后在控制台的输出信息

Logi("CommonUtil:getSDCardPath", lineStr);

if (lineStrcontains("sdcard")

&& lineStrcontains("android_secure")) {

String[] strArray = lineStrsplit(" ");

if (strArray != null && strArraylength >= 5) {

String result = strArray[1]replace("/android_secure",

"");

return result;

}

}

// 检查命令是否执行失败。

if (pwaitFor() != 0 && pexitValue() == 1) {

// pexitValue()==0表示正常结束，1：非正常结束

Loge("CommonUtil:getSDCardPath", "命令执行失败!");

}

}

} catch (Exception e) {

Loge("CommonUtil:getSDCardPath", etoString());

//return EnvironmentgetExternalStorageDirectory()getPath();

}finally{

try {

if(in!=null){

inclose();

}

} catch (IOException e) {

// TODO Auto-generated catch block

eprintStackTrace();

}

try {

if(inBr!=null){

inBrclose();

}

} catch (IOException e) {

// TODO Auto-generated catch block

eprintStackTrace();

}

}

return EnvironmentgetExternalStorageDirectory()getPath();

}

//查看所有的sd路径

public String getSDCardPathEx(){

String mount = new String();

try {

Runtime runtime = RuntimegetRuntime();

Process proc = runtimeexec("mount");

InputStream is = procgetInputStream();

InputStreamReader isr = new InputStreamReader(is);

String line;

BufferedReader br = new BufferedReader(isr);

while ((line = brreadLine()) != null) {

if (linecontains("secure")) continue;

if (linecontains("asec")) continue;

if (linecontains("fat")) {

String columns[] = linesplit(" ");

if (columns != null && columnslength > 1) {

mount = mountconcat("" + columns[1] + "\n");

}

} else if (linecontains("fuse")) {

String columns[] = linesplit(" ");

if (columns != null && columnslength > 1) {

mount = mountconcat(columns[1] + "\n");

}

}

}

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

eprintStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

eprintStackTrace();

}

return mount;

}

//获取当前路径，可用空间

public static long getAvailableSize(String path){

try{

File base = new File(path);

StatFs stat = new StatFs(basegetPath());

long nAvailableCount = statgetBlockSize() ((long) statgetAvailableBlocks());

return nAvailableCount;

}catch(Exception e){

eprintStackTrace();

}

return 0;

}

直接调用文件管理器选择即可。

1、调用系统提供的选择器，代码如下：

//注意，在Android44系统下建议使用 IntentACTION_OPEN_DOCUMENT方式

if (UtilityisKK()) {

Intent intent = new Intent(IntentACTION_OPEN_DOCUMENT);

intentaddCategory(IntentCATEGORY_OPENABLE);

intentsetType("image

public static String getDataColumn(Context context, Uri uri, String selection,

String[] selectionArgs) {

Cursor cursor = null;

final String column = "_data";

final String[] projection = {

column

};

处理返回结果：

protected void onActivityResult(int requestCode, int resultCode,

Intent intent) {

superonActivityResult(requestCode, resultCode, intent);

if (resultCode == RESULT_OK) {

switch (requestCode) {

case PIC_RESULT://选择图库

case PIC_RESULT_KK:

imageFileUri = intentgetData();//获取选择的URI

break;

｝

｝

2、除此自外，系统还提供一种选择器，这个选择器可以屏蔽掉那个auto backup的目录所以就开始打算用这个选择器来选了

Intent intent=new Intent(IntentACTION_GET_CONTENT);//ACTION_OPEN_DOCUMENT

intentaddCategory(IntentCATEGORY_OPENABLE);

intentsetType("image/jpeg");

if(androidosBuildVERSIONSDK_INT>=androidosBuildVERSION_CODESKITKAT){

startActivityForResult(intent, SELECT_PIC_KITKAT);

}else{

startActivityForResult(intent, SELECT_PIC);

}

为什么要分开不同版本呢其实在43或以下可以直接用ACTION_GET_CONTENT的,在44或以上,官方建议用ACTION_OPEN_DOCUMENT,主要区别是他们返回的Uri43返回的是带文件路径的,而44返回的却是content://comandroidprovidersmediadocuments/document/image:3951这样的,没有路径,只有编号的uri可以通过以下方式，处理URI。

参考：Android 44从图库选择,获取路径并裁剪

public static String getPath(final Context context, final Uri uri) {

final boolean isKitKat = BuildVERSIONSDK_INT >= BuildVERSION_CODESKITKAT;

// DocumentProvider

if (isKitKat && DocumentsContractisDocumentUri(context, uri)) {

// ExternalStorageProvider

if (isExternalStorageDocument(uri)) {

final String docId = DocumentsContractgetDocumentId(uri);

final String[] split = docIdsplit(":");

final String type = split[0];

if ("primary"equalsIgnoreCase(type)) {

return EnvironmentgetExternalStorageDirectory() + "/" + split[1];

}

// TODO handle non-primary volumes

}

// DownloadsProvider

else if (isDownloadsDocument(uri)) {

final String id = DocumentsContractgetDocumentId(uri);

final Uri contentUri = ContentUriswithAppendedId(

Uriparse("content://downloads/public_downloads"), LongvalueOf(id));

return getDataColumn(context, contentUri, null, null);

}

// MediaProvider

else if (isMediaDocument(uri)) {

final String docId = DocumentsContractgetDocumentId(uri);

final String[] split = docIdsplit(":");

final String type = split[0];

Uri contentUri = null;

if ("image"equals(type)) {

contentUri = MediaStoreImagesMediaEXTERNAL_CONTENT_URI;

} else if ("video"equals(type)) {

contentUri = MediaStoreVideoMediaEXTERNAL_CONTENT_URI;

} else if ("audio"equals(type)) {

contentUri = MediaStoreAudioMediaEXTERNAL_CONTENT_URI;

}

final String selection = "_id=";

final String[] selectionArgs = new String[] {

split[1]

};

return getDataColumn(context, contentUri, selection, selectionArgs);

}

}

// MediaStore (and general)

else if ("content"equalsIgnoreCase(urigetScheme())) {

// Return the remote address

if (isGooglePhotosUri(uri))

return urigetLastPathSegment();

return getDataColumn(context, uri, null, null);

}

// File

else if ("file"equalsIgnoreCase(urigetScheme())) {

return urigetPath();

}

return null;

}

public static String getDataColumn(Context context, Uri uri, String selection,

String[] selectionArgs) {

Cursor cursor = null;

final String column = "_data";

final String[] projection = {

column

};

try {

cursor = contextgetContentResolver()query(uri, projection, selection, selectionArgs,

null);

if (cursor != null && cursormoveToFirst()) {

final int index = cursorgetColumnIndexOrThrow(column);

return cursorgetString(index);

}

} finally {

if (cursor != null)

cursorclose();

}

return null;

}

public static boolean isExternalStorageDocument(Uri uri) {

return "comandroidexternalstoragedocuments"equals(urigetAuthority());

}

public static boolean isDownloadsDocument(Uri uri) {

return "comandroidprovidersdownloadsdocuments"equals(urigetAuthority());

}

public static boolean isMediaDocument(Uri uri) {

return "comandroidprovidersmediadocuments"equals(urigetAuthority());

}

public static boolean isGooglePhotosUri(Uri uri) {

return "comgoogleandroidappsphotoscontent"equals(urigetAuthority());

}

3、使用其它开源组件如PhotoView。

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