我想选择从照片库中的图像文件,并写入SD卡。以下是导致异常的代码。它似乎在尝试创建FileOutputStream时引发此异常。我有以下行添加到嵌套在应用程序元素内的清单文件。我无法找到一个解决问题的办法:java.io.FileNotFoundException(拒绝)当试图写入到Android SD卡
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
public boolean saveSelectedImage(Uri selectedImage, int imageGroup,
int imageNumber)
{
boolean exception = false;
InputStream input = null;
OutputStream output = null;
if(externalStorageIsWritable())
{
try
{
ContentResolver content = ctx.getContentResolver();
input = content.openInputStream(selectedImage);
if(input != null) Log.v(CLASS_NAME, "Input Stream Opened successfully");
File outFile = null;
File root = Environment.getExternalStorageDirectory();
if(root == null) Log.v(CLASS_NAME, "FAILED TO RETRIEVE DIRECTORY");
else Log.v(CLASS_NAME, "ROOT DIRECTORY is:"+root.toString());
output = new FileOutputStream(root+"/Image"+ imageGroup + "_" + imageNumber + ".png");
if(output != null) Log.e(CLASS_NAME, "Output Stream Opened successfully");
// output = new FileOutputStream
// ("/sdcard/Image"+imageGroup+"_"+imageNumber+".png");
byte[] buffer = new byte[1000];
int bytesRead = 0;
while ((bytesRead = input.read(buffer, 0, buffer.length)) >= 0)
{
output.write(buffer, 0, buffer.length);
}
} catch (Exception e)
{
Log.e(CLASS_NAME, "Exception occurred while moving image: ");
e.printStackTrace();
exception = true;
} finally
{
// if(input != null)input.close();
// if(output != null)output.close();
// if (exception) return false;
}
return true;
} else
return false;
}
您是否要求获得在清单中写入的权限? – 2011-01-28 01:52:40
我找到了我的问题的答案uses-permission元素必须在清单文件中的应用程序元素之外。 – joefischer1 2011-01-28 01:58:36