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我在Android中创建一个小游戏,现在我想用一个文件作为存档。 开始时它会检查是否已经存在游戏存档,如果没有,则应该创建它。如果有一个存档游戏,它应该读取它。当您关闭应用程序/关闭手机/等。它应该保存它。 为了编码,我搜索了一下并找到了一些东西,但它似乎不起作用,但我不知道为什么。这里是我的类的相关片段:在内部存储器上创建,读取和保存文件(Android)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.activity_main);
FileStart();
}
public void FileStart() {
File external = getFilesDir();
String path = external.getPath();
File file = new File(path + "inv.txt");
if(file.exists()) {
//read files
try {
BufferedReader in = new BufferedReader(new FileReader(file));
String result = in.readLine();
String[] resultSplit = result.split("|");
fruits = Integer.parseInt(resultSplit[0]);
milk = Integer.parseInt(resultSplit[1]);
sugar = Integer.parseInt(resultSplit[2]);
wheat = Integer.parseInt(resultSplit[3]);
cake = Integer.parseInt(resultSplit[4]);
in.close();
TextView tView = new TextView(this);
tView=(TextView)findViewById(R.id.textView1);
tView.setText(fruits + " x Fruits");
tView=(TextView)findViewById(R.id.textView3);
tView.setText(milk + " x Milk");
tView=(TextView)findViewById(R.id.textView4);
tView.setText(sugar + " x Sugar");
tView=(TextView)findViewById(R.id.textView5);
tView.setText(wheat + " x Wheat");
tView=(TextView)findViewById(R.id.textView9);
tView.setText(cake + " Cakes");
} catch (Exception e) {
e.printStackTrace();
}
} else {
try {
file.createNewFile();
FileWriter filewriter = new FileWriter(file);
BufferedWriter out = new BufferedWriter(filewriter);
out.write("0|0|0|0|0");
out.flush();
out.close();
filewriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
protected void onPause() {
super.onPause(); // Always call the superclass method first
//save game progress
File external = getFilesDir();
String path = external.getPath();
File file = new File(path + "inv.txt");
try {
FileWriter filewriter = new FileWriter(file);
BufferedWriter out = new BufferedWriter(filewriter);
String toWrite = fruits + "|" + milk + "|" + "|" + sugar + "|" + wheat + "|" + cake;
out.write(toWrite);
out.flush();
out.close();
filewriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
是文件产生的?你面临的问题是什么?什么不起作用? – Skynet
看来该文件没有创建。我是否必须创建“getFilesDir()”的文件夹?“第一? – fmaster
Yes ofcourse,getFilesDir();会给你的应用程序文件夹,即在内部存储器和它的合适的,当用户卸载你的应用程序,该文件夹也将被删除。 – Skynet