Android：强制关闭后 SharedPreference 错误
强制关闭应用程序后，我收到一些奇怪的效果。当使用 finish() 关闭应用程序时，一切都很好。我在共享首选项中保存了一些变量，因此当再次加载应用程序时，它可以将这些变量恢复到 UI 中。但是，如果我强制关闭应用程序，然后尝试从中断处继续，某些变量就会开始“表现得很有趣”。我的意思是（在onCreate中）我检查从sharedPreferences加载的字符串是否等于一个值（简化版本）：
String namec;
private static final String TAG = "MyActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//namec was set as "forest" in a previous activity
//which is bypassed if the user selects continue
//from the main menu
SharedPreferences pathtaken = getSharedPreferences("pathtakenpref", MODE_WORLD_READABLE);
namec = pathtaken.getString("namec", "Unknown");
ImageView v1 = (ImageView) findViewById(R.id.pathpic1);
RelativeLayout v2 = (RelativeLayout) findViewById(R.id.pathmain);
Log.i(TAG, "namec= " + namec);
if(namec == "forest"){
v1.setImageResource(R.drawable.forest);
v2.setBackgroundResource(R.drawable.forestrepeat);
}
}
这里发生的是namec，实际上等于“forest”。我将值发送到日志，它完全按照应有的方式显示变量（“森林”）。但它不会运行 if{} 内的代码。它让我做噩梦。我已经被这个问题困扰了一个星期了！
在相同的代码中，我加载一组不同的共享首选项（标记为 TRHprefs），其中每个（6 个整数和 3 个字符串）加载并显示得很好。我什至添加了一个 if{} 来测试 TRHprefs 中的 1 个字符串和 1 个整数...它们都返回 true。
问题 1：是否有任何因素会导致我的 SharedPreferences xml 在强制关闭时以某种方式损坏？
Q.2：有没有办法让我在使用强制关闭之前和之后查看 xml 文件以帮助调试情况。非常感谢！
I'm getting some weird effects after I force close my app. When the app is closed with finish(), everything is fine. I have some variables saved in a sharedPreferences so when the app is loaded again, it can restore those variables into the UI. However, if I force close the app and THEN try to continue where it had left off, some variables start "acting funny". By that I mean (in onCreate) I check to see if a string, loaded from the sharedPreferences, equals a value (crunched down version):
String namec;
private static final String TAG = "MyActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//namec was set as "forest" in a previous activity
//which is bypassed if the user selects continue
//from the main menu
SharedPreferences pathtaken = getSharedPreferences("pathtakenpref", MODE_WORLD_READABLE);
namec = pathtaken.getString("namec", "Unknown");
ImageView v1 = (ImageView) findViewById(R.id.pathpic1);
RelativeLayout v2 = (RelativeLayout) findViewById(R.id.pathmain);
Log.i(TAG, "namec= " + namec);
if(namec == "forest"){
v1.setImageResource(R.drawable.forest);
v2.setBackgroundResource(R.drawable.forestrepeat);
}
}
What happens here is namec, does in fact, equal "forest". I send the value to the log and it shows the variable exactly as it should be ("forest"). Yet it won't run the code inside of the if{}. It's giving me nightmares. I've been stuck on this for a week!
In the same code, I load a different set of sharedPreferences (labeled as TRHprefs) and each one of those (6 integers and 3 strings) load up and display just fine. I even add an if{} to test 1 string and 1 integer from TRHprefs... they both came back true.
Q.1: Is there anything that can cause my sharedPreferences xml to become, somehow, corrupted on a force close?
Q.2: Is there a way for me to view the xml file before and after I use force close to help debug the situation. Thanks so much!
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它是一个字符串。试试这个：
Its a String. Try this:
如果你想比较两个字符串，你需要使用这个：
If you want to compare two String you need to use this: