1. 判断 SDCard 是否存在,并且是否具有可读写权限
staticpublicboolean isExternalStorageAvailable() {
return Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED);
}
2.获取手机系统可用空间大小
staticpubliclong getAvailableInternalMemorySize() {
File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
return availableBlocks * blockSize;
}
3.获取手机内部总空间大小
staticpubliclong getTotalInternalMemorySize() {
File path = Environment.getDataDirectory();//Gets the Android data directory
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize(); //每个block 占字节数
long totalBlocks = stat.getBlockCount(); //block总数
return totalBlocks * blockSize;
}
4.获取手机外部可用空间大小、获取手机外部总空间大小
staticpubliclong getAvailableExternalMemorySize() {
if (isExternalStorageAvailable()) {
File path = Environment.getExternalStorageDirectory();//获取SDCard根目录
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
return availableBlocks * blockSize;
} else {
return -1;
}
}
staticpubliclong getTotalExternalMemorySize() {
if (isExternalStorageAvailable()) {
File path = Environment.getExternalStorageDirectory(); //获取SDCard根目录
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long totalBlocks = stat.getBlockCount();
return totalBlocks * blockSize;
} else {
return -1;
}
}
