[英]Android App Internal Data Storage
I am attempting to save an array of longs as a text file using the Android's internal memory, and then access that array in a different activity. 我试图使用Android的内部存储器将long数组保存为文本文件,然后在其他活动中访问该数组。 After noticing that was broken, I isolated the problem in this chunk of code below.
注意到已损坏后,我在下面的这段代码中隔离了该问题。
long[] timings = {200, 400, 600, 1400};
try {
FileOutputStream fos = openFileOutput("timings", Context.MODE_PRIVATE);
OutputStreamWriter osw = new OutputStreamWriter(fos);
osw.write(Arrays.toString(timings));
osw.close();
FileInputStream fis = openFileInput("timings");
InputStreamReader isReader = new InputStreamReader(fis);
char[] buffer = new char[timings.length];
isReader.read(buffer);
textField.setText(Arrays.toString(buffer));
fis.close();
} catch (IOException e1) {
e1.printStackTrace();
}
The text field that is set to display what is read from the file has the following result: 设置为显示从文件中读取的内容的文本字段具有以下结果:
[[,2,0,0]
The result I expected was the original array from above. 我期望的结果是上面的原始数组。 What am I doing wrong here?
我在这里做错了什么? Any help or advice would be appreciated.
任何帮助或建议,将不胜感激。
Replace this : 替换为:
InputStreamReader isReader = new InputStreamReader(fis);
char[] buffer = new char[timings.length];
isReader.read(buffer);
textField.setText(Arrays.toString(buffer));
with this : 有了这个 :
DataInputStream in = new DataInputStream(fis);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String sTemp1 = "", sTemp2 = "";
while ((sTemp1 = br.readLine()) != null) {
sTemp2 = sTemp1;
}
in.close();
textField.setText(sTemp2);
I hope it will help you. 希望对您有帮助。
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