我正在使用以下函數將對象寫入外部存儲。如何從外部存儲中刪除寫入的數據?
使用它之後,我想從外部存儲器中刪除該對象以釋放內存。 任何人都可以指導我該怎麼辦?
public boolean saveObject(List<DalCategories> obj) {
if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) {
cacheDir=new File(android.os.Environment.getExternalStorageDirectory(),"MyCustomObjectForSearchFilter");
} else {
cacheDir= getCacheDir();
if(!cacheDir.exists()) {
cacheDir.mkdirs();
}
final File suspend_f = new File(cacheDir, "test");
FileOutputStream fos = null;
ObjectOutputStream oos = null;
boolean keep = true;
try {
fos = new FileOutputStream(suspend_f);
oos = new ObjectOutputStream(fos);
oos.writeObject(obj);
} catch (Exception e) {
keep = false;
} finally {
try {
if (oos != null) {
oos.close();
}
if (fos != null) {
fos.close();
}
if (keep == false) {
suspend_f.delete();
}
} catch (Exception e) {
keep = false;
}
}
return keep;
}
調用.delete方法後,它會直接從外部存儲中刪除該文件? – UMAR 2011-01-06 13:49:25