Android 将文件保存到SD卡，从卡中取文件，及删除文件
//保存到SD卡
private static String sdState = Environment.getExternalStorageState();
private static String path = Environment.getExternalStorageDirectory().toString();
public static void saveBitmap(Bitmap bitmap,String imageName)
{
File file;
File PicName;
if(sdState.equals(Environment.MEDIA_MOUNTED))
{
//获得sd卡根目录
file = new File(path + "/Huai/TicketsPic");
if(!file.exists())
{
file.mkdirs();
}
PicName = new File(file, imageName);
try {
if(!PicName.exists())
{
PicName.createNewFile();
}
FileOutputStream fos = new FileOutputStream(PicName);
if(PicName.getName().endsWith(".png"))
{
bitmap.compress(CompressFormat.PNG, 100, fos);
}
else if(PicName.getName().endsWith(".jpg"))
{
bitmap.compress(CompressFormat.JPEG, 100, fos);
}
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
//从SD卡取
public static Bitmap getBitmap(String imageName)
{
Bitmap bitmap = null;
File imagePic;
if(sdState.equals(Environment.MEDIA_MOUNTED))
{
imagePic = new File(path + "/Huai/TicketsPic", imageName);
if(imagePic.exists())
{
try {
bitmap = BitmapFactory.decodeStream(new FileInputStream(imagePic));
} catch (FileNotFoundException e) {
// e.printStackTrace();
}
}
}
return bitmap;
}
／／将SD卡文件删除
public static void deleteFile(File file)
{
if(sdState.equals(Environment.MEDIA_MOUNTED))
{
if (file.exists())
{
if (file.isFile())
{
file.delete();
}
// 如果它是一个目录
else if (file.isDirectory())
{
// 声明目录下所有的文件 files[];
File files[] = file.listFiles();
for (int i = 0; i < files.length; i++)
{ // 遍历目录下所有的文件
deleteFile(files[i]); // 把每个文件 用这个方法进行迭代
}
}
file.delete();
}
}
}
补充：移动开发 , Android ,
