Android内存和SD卡工具类

分享到:
import java.io.File;
import android.os.Environment;
import android.os.StatFs;
public class StorageUtil {
private static final int ERROR = -1;
public static int save_dir = 1;
// 判断是否已经安装SD卡
public static boolean isSDCardExist() {
return android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
}
// 内存剩余空间
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;
}
// 内存总空间
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;
}
// SD卡剩余空间
public static long getAvailableExternalMemorySize() {
if (isSDCardExist()) {
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
return availableBlocks * blockSize;
} else {
return ERROR;
}
}
// SD卡总空间
public static long getTotalExternalMemorySize() {
if (isSDCardExist()) {
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long totalBlocks = stat.getBlockCount();
return totalBlocks * blockSize;
} else {
return ERROR;
}
}
// 判断SD卡下external_sd文件夹的总大小
public static long getTotalExternal_SDMemorySize() {
if (isSDCardExist()) {
File path = Environment.getExternalStorageDirectory();
File externalSD = new File(path.getPath() + "/external_sd");
if (externalSD.exists() && externalSD.isDirectory()) {
StatFs stat = new StatFs(path.getPath() + "/external_sd");
long blockSize = stat.getBlockSize();
long totalBlocks = stat.getBlockCount();
if (getTotalExternalMemorySize() != -1
&& getTotalExternalMemorySize() != totalBlocks* blockSize) {
return totalBlocks * blockSize;
} else {
return ERROR;
}
} else {
return ERROR;
}
} else {
return ERROR;
}
}
// 判断SD卡下external_sd文件夹的可用大小
public static long getAvailableExternal_SDMemorySize() {
if (isSDCardExist()) {
File path = Environment.getExternalStorageDirectory();
File externalSD = new File(path.getPath() + "/external_sd");
if (externalSD.exists() && externalSD.isDirectory()) {
StatFs stat = new StatFs(path.getPath() + "/external_sd");
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
if (getAvailableExternalMemorySize() != -1
&& getAvailableExternalMemorySize() != availableBlocks* blockSize) {
return availableBlocks * blockSize;
} else {
return ERROR;
}
} else {
return ERROR;
}
} else {
return ERROR;
}
}
}  

昵    称:
验证码:

相关文档: