所以标题几乎总结了我的问题,但我不知道我在做什么错误至于代码。当我写入Android中的文件时,它覆盖了以前的文件
这里就是我写的文件snipbit:
try {
FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
OutputStreamWriter osw = new OutputStreamWriter(fos);
osw.append(assignmentTitle + "\n" + assignmentDate + "\n");
osw.flush();
osw.close();
} catch (FileNotFoundException e) {
//catch errors opening file
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
编辑:这是我从文件中的每个活动被称为在功能
private void readDataFromFile() {
try {
//Opens a file based on the file name stored in FILENAME.
FileInputStream myIn = openFileInput(FILENAME);
//Initializes readers to read the file.
InputStreamReader inputReader = new InputStreamReader(myIn);
BufferedReader BR = new BufferedReader(inputReader);
//Holds a line from the text file.
String line;
//currentAssignment to add to the list
Assignment currentAssignment = new Assignment();
while ((line = BR.readLine()) != null) {
switch (index) {
case 0:
//Toast.makeText(this, line, Toast.LENGTH_LONG).show();
currentAssignment.setTitle(line);
index++;
break;
case 1:
//Toast.makeText(this, Integer.toString(assignmentListIndex), Toast.LENGTH_LONG).show();
currentAssignment.setDate_due(line);
Statics.assignmentList.add(assignmentListIndex, currentAssignment);
index = 0;
assignmentListIndex++;
currentAssignment = new Assignment();
break;
default:
Toast.makeText(this, "error has occured", Toast.LENGTH_SHORT).show();
break;
}
}
BR.close();
} catch (IOException e) {
e.printStackTrace();
}
}
那一次阅读时,用户点击创建一个新的作业。当他们点击任务上的保存按钮时,应该将该分配保存到一个文件中,然后稍后再读取并将其显示在listView中。它正在做的是在listView中显示第一个项目,当我创建一个新的任务时,它将覆盖保存文件中的前一个文本并将其替换为listView。如果你们需要我发布更多的代码让我知道。我很困惑,为什么这不是Context.MODE_PRIVATE
工作:(
我认为这解决了它!它现在展示的一切文件中,现在弄清楚为什么它仍然只显示任务之一listView。感谢您的帮助!:) – cj1098