如何使用SharedPreferences保存URI或任何存储? [英] How to use SharedPreferences to save a URI, or any Storage?

问题描述

URI imageUri = null;

//Setting the Uri of aURL to imageUri.
try {
    imageUri = aURL.toURI();
} catch (URISyntaxException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
}

我正在使用此代码将URL转换为URI.如何将imageUri保存到SharedPreferences或无法在onDestroy()上将其删除的内存中?

I am using this code to translate a URL to a URI. How could I save the imageUri to a SharedPreferences, or a memory where it wouldnt be deleted onDestroy()?

我不想做SQLite数据库，因为URL更改时URI会改变.我不想用完未使用的URI的内存

I dont want to do SQLite database because the URI will change when the URL's change.I dont want to use up memory for unused URI's

推荐答案

要开始使用SharedPreferences进行存储，您需要在onCreate()中添加如下内容:

To get started using SharedPreferences for storage you'll need to have something like this in your onCreate():

SharedPreferences myPrefs = getSharedPreferences(myTag, 0);
SharedPreferences.Editor myPrefsEdit = myPrefs.edit();

我认为您可以执行以下操作来存储它:

I think you can do something like this to store it:

myPrefsEdit.putString("url", imageUri.toString());
myPrefsEdit.commit();

然后使用类似的方法进行检索:

And then something like this to retrieve:

try {
    imageUri = URI.create(myPrefs.getString("url", "defaultString"));
} catch (IllegalArgumentException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

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