存储ArrayList< PendingIntent>进入SharedPreferences [英] Store ArrayList<PendingIntent> into SharedPreferences

问题描述

II无法找到我的问题的答案，所以我决定发布一个问题.问题很简单.

II couldn't find an answer for my problem so I decided to post a question. The question is simple.

如何将ArrayList<PendingIntent>存储到SharedPreferences中?最好的方法是什么，我必须使用某种Serialization吗?

How can I store an ArrayList<PendingIntent> into SharedPreferences? What is the best way, do i have to use some kind of Serialization?

提前谢谢您，任何建议都很好！

Thank you in advance, any advice would be great!

推荐答案

PendingIntent实现Parcelable.您需要遍历ArrayList，并将每个PendingIntent转换为String.然后，您可以将所有单个String连接到单个String中(每个之间都有一些定界符).然后将生成的String写入SharedPreferences.

PendingIntent implements Parcelable. You'll need to loop through your ArrayList and convert each PendingIntent into a String. You can then concatenate all the individual Strings into a single String (with some delimiter in between each one). Then write the resulting String to SharedPreferences.

您可以像这样将Parcelable转换为byte[]:

You can convert a Parcelable into a byte[] like this:

PendingIntent pendingIntent = // Your PendingIntent here
Parcel parcel = Parcel.obtain(); // Get a Parcel from the pool
pendingIntent.writeToParcel(parcel, 0);
byte[] bytes = parcel.marshall();
parcel.recycle(); // Return the Parcel to the pool

现在通过使用base64编码(或任何其他机制，如将每个字节转换为2个十六进制数字)将byte[]转换为String.要使用base64，您可以执行以下操作:

Now convert the byte[] to a String by using base64 encoding (or any other mechanism, like converting each byte into 2 hexadecimal digits). To use base64 you can do this:

String base64String = Base64.encodeToString(bytes, Base64.NO_WRAP | Base64.NO_PADDING);

请参见

See How to marshall and unmarshall a Parcelable to a byte array with help of Parcel? for more information about how to convert a Parcelable to byte[] and vice-versa.

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