Question

我有一个应用程序，可以在驾驶时读取驱动程序的通知。我正在尝试解析各种通知。那些使用旧的＆＃39; tickerText＆＃39;工作正常，但像Skype这样的几个应用程序不支持。相反，在第一条消息之后的通知中的文本只是说了＆＃34; 3条新消息＆＃34;。不是很有帮助。我想要最后一个消息字符串。我写了这个：

public class Catcher extends NotificationListenerService {

File file;
String dir;
File save;
int count = 0;

@Override
public void onCreate() {
    super.onCreate();
    dir = Environment.getExternalStorageDirectory() + "/NotCatch";
    save = new File(dir);
    if(!save.exists()){
        save.mkdirs();
    }

    //Toast.makeText(this, dir + " " + file.getName(), Toast.LENGTH_LONG).show();

}

@Override
public void onNotificationPosted(StatusBarNotification sbn) {
    super.onNotificationPosted(sbn);

    file = new File(save, "NotCatch" + count + ".txt");
    count++;
    String temp = "";
    String[] lines;
    Notification not = sbn.getNotification();
    temp += "Category: " + not.category+ "\n";
    temp+= "TickerText: " + not.tickerText + "\n";

    temp += "Extras..."+ "\n";
    Bundle bun = not.extras;
    temp+= "BigText: " + bun.getString(Notification.EXTRA_BIG_TEXT)+ "\n";
    temp+= "SummaryText: " + bun.getString(Notification.EXTRA_SUMMARY_TEXT)+ "\n";
    temp+= "InfoText: " + bun.getString(Notification.EXTRA_INFO_TEXT)+ "\n";
    temp+= "Text: " + bun.getString(Notification.EXTRA_TEXT)+ "\n";
    temp+= "TextLines: " + bun.getString(Notification.EXTRA_TEXT_LINES)+ "\n";
    temp+= "SubText: " + bun.getString(Notification.EXTRA_SUB_TEXT) + "\n";
    temp+= "Title:" + bun.getString(Notification.EXTRA_TITLE) +"\n";
    temp+= "Big Title:" + bun.getString(Notification.EXTRA_TITLE_BIG) +"\n";


/*    lines = bun.getString(Notification.EXTRA_TEXT_LINES).split("\n");

    temp += "Lines... \n" ;

    int cnt = 0;
    for (String line : lines) {
        temp+= cnt + ": " + line + "\n";
        cnt++;
    }*/



    Looper.prepare();
    try {
        FileOutputStream fos = new FileOutputStream(file);
        fos.write(temp.getBytes());
        fos.close();
        Toast.makeText(this,"File written", Toast.LENGTH_LONG).show();
    } catch (FileNotFoundException e) {
        Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
        Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
    }

这正是我到目前为止进行测试的原因。我可以从通知中获取包，但它无法获取消息行的字符串数组。它在调试器中看起来像这样。＆＃39; BUN＆＃39;以下是＆＃39; Bundle＆＃39;来自＆＃39;通知＆＃39;。

我的问题是这个。如何获得以＆＃34开头的字符串数组;一些消息文本 - 4＆＃34;？这是来自Android通知的捆绑包。

Answer 1

由于您尝试检索的字符串包含在ArrayMap mMap中（根据调试器图像），并且由于Map的实现是可序列化的，因此您需要执行以下操作以首先检索该映射：< / p>

ArrayMap map = bun.getSerializableExtra("mMap");

然后，您应该能够获得所需的字符串数组（根据调试器图像是CharSequence对象的数组），具有以下内容：

CharSequence[] messages = (CharSequence[]) map.valueAt(1);

有关捆绑和地图的有趣读物： https://medium.com/the-wtf-files/the-mysterious-case-of-the-bundle-and-the-map-7b15279a794e#.kf3m2haa3

Answer 2

我终于能够以这种方式获得字符串

 CharSequence[] lines = bun.getCharSequenceArray(Notification.EXTRA_TEXT_LINES);
    for(CharSequence line : lines){
        temp+= "line: " + line.toString() + "\n";
    }

如何从Notification包中获取字符串数组？

2 个答案: