Android ClassCastException:字符串到ArrayList强制转换引发异常

我在MainActivity中具有以下功能：

private void exportToMail(String[] tos)
{
    Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND_MULTIPLE);
    emailIntent.setType("text/plain");
    emailIntent.putExtra(Intent.EXTRA_EMAIL, tos);
    emailIntent.putExtra(Intent.EXTRA_SUBJECT, "gradius data ver: " + getAppVersion());
    emailIntent.putExtra(Intent.EXTRA_TEXT, getFormattedData());

    ArrayList<Uri> uris = new ArrayList<>();
    for (File fileIn : new File(getExportFolder(this)).listFiles())
    {
        uris.add(FileProvider.getUriForFile(MainActivity.this, getString(R.string.file_provider_authority),fileIn));
    }

    if(!uris.isEmpty())
        emailIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);

    //This is where the error occurs according to the Logcat.
    startActivity(Intent.createChooser(emailIntent, "Pick an Email provider")); 
}

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如果将文本和数据一起发送并不重要，并且如果希望将某些内容放入附件中，则可以删除到此行：emailIntent.putExtra（Intent.EXTRA_text，getFormattedData（））； 我并没有找到一种方法来处理不同类型的数据和文本。 这是一个老生常谈的问题，但也许对某人有帮助

---

这对我很有用

你能提到哪一行的方法会抛出这个吗？它看起来像是

EXTRA_TEXT

一个，在这种情况下，请为

getFormattedData

方法添加代码。是的，我实际上在代码段的上面放了一条注释，但我会编辑我的问题，这样它会更清晰。啊，我错过了那条注释。我的bad@Keselme几天前我也犯了同样的错误。。。你试过我的答案了吗？我也有同样的问题有什么解决办法吗？

2019-04-02 14:05:58.566 10783-10783/com.crowdx.gradius.testapp W/Bundle: Key android.intent.extra.TEXT expected ArrayList<CharSequence> but value was a java.lang.String.  The default value <null> was returned.
2019-04-02 14:05:58.567 10783-10783/com.crowdx.gradius.testapp W/Bundle: Attempt to cast generated internal exception:
    java.lang.ClassCastException: java.lang.String cannot be cast to java.util.ArrayList
        at android.os.BaseBundle.getCharSequenceArrayList(BaseBundle.java:1302)
        at android.os.Bundle.getCharSequenceArrayList(Bundle.java:1076)
        at android.content.Intent.getCharSequenceArrayListExtra(Intent.java:8227)
        at android.content.Intent.migrateExtraStreamToClipData(Intent.java:11093)
        at android.content.Intent.migrateExtraStreamToClipData(Intent.java:11056)
        at android.app.Instrumentation.execStartActivity(Instrumentation.java:1666)
        at android.app.Activity.startActivityForResult(Activity.java:4688)
        at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:767)
        at android.app.Activity.startActivityForResult(Activity.java:4646)
        at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:754)
        at android.app.Activity.startActivity(Activity.java:5007)
        at android.app.Activity.startActivity(Activity.java:4975)
        at com.crowdx.gradius_sdk.testApp.ui.activities.MainActivity.exportToMail(MainActivity.java:523)
        at com.crowdx.gradius_sdk.testApp.ui.activities.MainActivity.selectedStrings(MainActivity.java:485)
        at com.crowdx.gradius_sdk.testApp.ui.components.MultiSelectionSpinner$1.onClick(MultiSelectionSpinner.java:74)
        at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:184)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:6981)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)

 startActivity(Intent.createChooser(emailIntent, "Pick an Email provider"));