Android6.0上会根据卡的种类和卡的挂载状态来动态生成挂载路径,所以之前写固定路径的办法不可用,最后通过网上查找和分析android源码,通过反射获取到路径,并且进行了正确区分,代码如下:
/**
* 6.0获取外置sdcard和U盘路径,并区分
* @param mContext
* @param keyword SD = "内部存储"; EXT = "SD卡"; USB = "U盘"
* @return
*/
public static String getStoragePath(Context mContext,String keyword) {
String targetpath = "";
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");
Object result = getVolumeList.invoke(mStorageManager);
final int length = Array.getLength(result);
Method getUserLabel = storageVolumeClazz.getMethod("getUserLabel");
for (int i = 0; i < length; i++) {
Object storageVolumeElement = Array.get(result, i);
String userLabel = (String) getUserLabel.invoke(storageVolumeElement);
String path = (String) getPath.invoke(storageVolumeElement);
if(userLabel.contains(keyword)){
targetpath
= path;
}
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
return targetpath
;
}
这里拿到的userLabel就是系统给每个盘的一个label,用来区分是内部存储、sdcard还是U盘,内卡的label固定,但是sdcard和U盘的label是根据种类,状态等信息等动态生成,所以这里“if(userLabel.contains(keyword)){”没有用equals。
总结:不懂看源码
来源:CSDN
作者:JulyAnRef
链接:https://blog.csdn.net/xuan521521/article/details/70799159