java.lang.ClassCastException：android.text.SpannableStringBuilder无法强制转换为java.util.ArrayList

我正在使用phonegap Android插件：EmailComposerwithAttachments https://github.com/phonegap/phonegap-plugins/tree/master/Android/EmailComposerWithAttachments,并且在执行startActivitywithResult函数时出现以下错误.我正在使用Android 4.2和Cordova 2.5.0

java.lang.ClassCastException：android.text.SpannableStringBuilder无法强制转换为java.util.ArrayList

// setting attachments
    try {
        JSONArray attachments = parameters.getJSONArray("attachments");
        if (attachments != null && attachments.length() > 0) {
            ArrayList<Uri> uris = new ArrayList<Uri>();
            //convert from paths to Android friendly Parcelable Uri's
            for (int i=0; i<attachments.length(); i++) {
                try {
                    File file = new File(attachments.getString(i));
                    if (file.exists()) {
                        Uri uri = Uri.fromFile(file);
                        uris.add(uri);
                    }
                } catch (Exception e) {
                    LOG.e("EmailComposer", "Error adding an attachment: " + e.toString());
                }
            }
            if (uris.size() > 0) {
                emailIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
            }
        }
    } catch (Exception e) {
        LOG.e("EmailComposer", "Error handling attachments param: " + e.toString());
    }

    this.cordova.startActivityForResult(this, emailIntent, 0);

以下是完整的跟踪.

04-02 16:34:13.120: W/Bundle(698): Key android.intent.extra.TEXT expected ArrayList<CharSequence> but value was a android.text.SpannableStringBuilder.  The default value <null> was returned.

04-02 16:34:13.150: W/Bundle(698): Attempt to cast generated internal exception:

04-02 16:34:13.150: W/Bundle(698): java.lang.ClassCastException: 
android.text.SpannableStringBuilder cannot be cast to java.util.ArrayList

04-02 16:34:13.150: W/Bundle(698):  at android.os.Bundle.getCharSequenceArrayList(Bundle.java:1326)

04-02 16:34:13.150: W/Bundle(698):  at android.content.Intent.getCharSequenceArrayListExtra(Intent.java:4224)

04-02 16:34:13.150: W/Bundle(698):  at android.content.Intent.migrateExtraStreamToClipData(Intent.java:6682)

04-02 16:34:13.150: W/Bundle(698):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1410)

04-02 16:34:13.150: W/Bundle(698):  at android.app.Activity.startActivityForResult(Activity.java:3351)

04-02 16:34:13.150: W/Bundle(698):  at android.app.Activity.startActivityForResult(Activity.java:3312)

04-02 16:34:13.150: W/Bundle(698):  at org.apache.cordova.DroidGap.startActivityForResult(DroidGap.java:812)

04-02 16:34:13.150: W/Bundle(698):  at org.apache.cordova.example.EmailComposer.sendEmail(EmailComposer.java:157)

04-02 16:34:13.150: W/Bundle(698):  at org.apache.cordova.example.EmailComposer.execute(EmailComposer.java:36)

04-02 16:34:13.150: W/Bundle(698):  at org.apache.cordova.api.CordovaPlugin.execute(CordovaPlugin.java:61)

04-02 16:34:13.150: W/Bundle(698):  at org.apache.cordova.api.PluginManager.exec(PluginManager.java:220)

04-02 16:34:13.150: W/Bundle(698):  at org.apache.cordova.ExposedJsApi.exec(ExposedJsApi.java:44)

04-02 16:34:13.150: W/Bundle(698):  at android.webkit.WebViewCore.nativeMouseClick(Native Method)

04-02 16:34:13.150: W/Bundle(698):  at android.webkit.WebViewCore.nativeMouseClick(Native Method)

04-02 16:34:13.150: W/Bundle(698):  at android.webkit.WebViewCore.access$6800(WebViewCore.java:57)

04-02 16:34:13.150: W/Bundle(698):  at android.webkit.WebViewCore$EventHub.dispatchWebKitEvent(WebViewCore.java:1806)

04-02 16:34:13.150: W/Bundle(698):  at android.webkit.WebViewInputDispatcher.dispatchWebKitEvent(WebViewInputDispatcher.java:689)

04-02 16:34:13.150: W/Bundle(698):  at android.webkit.WebViewInputDispatcher.dispatchWebKitEvents(WebViewInputDispatcher.java:639)

04-02 16:34:13.150: W/Bundle(698):  at android.webkit.WebViewInputDispatcher.access$800(WebViewInputDispatcher.java:78)

04-02 16:34:13.150: W/Bundle(698):  at android.webkit.WebViewInputDispatcher$WebKitHandler.handleMessage(WebViewInputDispatcher.java:1153)

04-02 16:34:13.150: W/Bundle(698):  at android.os.Handler.dispatchMessage(Handler.java:99)

04-02 16:34:13.150: W/Bundle(698):  at android.os.Looper.loop(Looper.java:137)

04-02 16:34:13.150: W/Bundle(698):  at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:827)

04-02 16:34:13.150: W/Bundle(698):  at java.lang.Thread.run(Thread.java:856)

解决方法:

这是Android 4.x中的这个this bug

您可以通过在EmailComposer.java中替换此行来解决纯文本电子邮件的问题：

emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, body);

同

ArrayList<String> extra_text = new ArrayList<String>();
extra_text.add(body);
emailIntent.putStringArrayListExtra(android.content.Intent.EXTRA_TEXT, extra_text);

但这不适用于HTML电子邮件,因为Spanned(由Html.fromHtml返回)不是Charsequence的子类.当我尝试将Html.fromHtml()的结果转换为字符串时,标记显示为文本的一部分:-(

此外,当我尝试这个时,使用Gmail应用程序时出现了纯文本电子邮件,但它没有出现在库存电子邮件应用程序 – 正文总是空白.

标签：android,cordova,spannablestring
来源： https://codeday.me/bug/20191007/1867807.html