在 Android 内部存储中缓存对象

Question

i am storing data in internal storage

public static void writeObject(Context context, String key, Object object) throws IOException {
  FileOutputStream fos = context.openFileOutput(key, Context.MODE_PRIVATE);
  ObjectOutputStream oos = new ObjectOutputStream(fos);
  oos.writeObject(object);
  oos.close();
  fos.close();

}

but can i see this saved data on phone if yes path please ? any way i can store where user can't see this

Answer 1

you can store the image in the Cache storage , it will be private, only from your application users can see the images

public static String saveToCacheMemory(Activity activity, Bitmap 

bitmapImage){

    SimpleDateFormat mDateFormat = new SimpleDateFormat("yyyyMMddHHmmss", Locale.US);

    ContextWrapper cw = new ContextWrapper(activity);
    File directory = cw.getDir("imageDir", Context.MODE_PRIVATE);
    // Create imageDir
    File mypath=new File(directory,mDateFormat.format(new Date())  + StaticVariables.imageFormat);

    Log.d(TAG, "directory: " + directory);

    FileOutputStream fos = null;
    try {
        fos = new FileOutputStream(mypath);
        // Use the compress method on the BitMap object to write image to the OutputStream
        bitmapImage.compress(Bitmap.CompressFormat.PNG, 100, fos);
        Log.d(TAG, "bit exception: Success" );
    } catch (Exception e) {
        Log.d(TAG, "bit exception: " + e.getMessage());
        e.printStackTrace();
    } finally {
        try {
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
            Log.d(TAG, "io exce: " + e.getMessage());
        }
    }
    Log.d(TAG, "absolute path " + directory.getAbsolutePath());
    return mypath.getAbsolutePath();
}

if you have more doubts check my blog post