Android：如何删除内部图像文件
我想要做什么：从我的应用程序的私人内部存储中删除图像文件。我将图像保存在内部存储中，以便在卸载应用程序时将其删除。
我已成功创建并保存：
String imageName = System.currentTimeMillis() + ".jpeg";
FileOutputStream fos = openFileOutput(imageName, Context.MODE_PRIVATE);
bitmap.compress(Bitmap.CompressFormat.JPEG, 35, fos);
我通过接收到的图像
bitmap = BitmapFactory.decodeStream(inputStream);
我可以稍后检索该图像以供显示：
FileInputStream fis = openFileInput(imageName);
ByteArrayOutputStream bufStream = new ByteArrayOutputStream();
DataOutputStream outWriter = new DataOutputStream(bufStream);
int ch;
while((ch = fis.read()) != -1)
outWriter.write(ch);
outWriter.close();
byte[] data = bufStream.toByteArray();
bufStream.close();
fis.close();
imageBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
我现在想永久删除此文件。我尝试创建一个新文件并删除它，但找不到该文件：
File file = new File(imageName);
file.delete();
我在 android 开发者网站上读到，我必须使用 openFileInput(...) 方法打开私有内部文件，该方法返回一个 InputStream 允许我读取内容，我并不真正关心 - 我只想删除它。
谁能指出我删除存储在内部存储中的文件的正确方向？
What i want to do: delete an image file from the private internal storage in my app. I save images in internal storage so they are deleted on app uninstall.
I have successfully created and saved:
String imageName = System.currentTimeMillis() + ".jpeg";
FileOutputStream fos = openFileOutput(imageName, Context.MODE_PRIVATE);
bitmap.compress(Bitmap.CompressFormat.JPEG, 35, fos);
an image that i receive through
bitmap = BitmapFactory.decodeStream(inputStream);
I am able to retrieve the image later for display:
FileInputStream fis = openFileInput(imageName);
ByteArrayOutputStream bufStream = new ByteArrayOutputStream();
DataOutputStream outWriter = new DataOutputStream(bufStream);
int ch;
while((ch = fis.read()) != -1)
outWriter.write(ch);
outWriter.close();
byte[] data = bufStream.toByteArray();
bufStream.close();
fis.close();
imageBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
I now want to delete this file permanently. I have tried creating a new file and deleting it, but the file is not found:
File file = new File(imageName);
file.delete();
I have read on the android developer website that i must open private internal files using the openFileInput(...) method which returns an InputStream allowing me to read the contents, which i don't really care about - i just want to delete it.
can anyone point me in the right direction for deleting a file which is stored in internal storage?
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呃，我自己找到了答案。答案也很简单:(
您所要做的就是调用
deleteFile(imageName)方法。完成！
Erg, I found the answer myself. Simple answer too :(
All you have to do is call the
deleteFile(imageName)method.Done!