java - Android-java.lang.IllegalArgumentException

Question

我已经看过这个question 。但无法弄清楚是什么问题。我正在使用 ImageSyncReciever 类中的 BackgroundMail 在后台发送电子邮件。但是，当发送电子邮件时，我的应用程序崩溃，同时给出以下错误

FATAL EXCEPTION: main Process: com.thumbsol.accuratemobileassetsmanagament, PID: 7480 java.lang.IllegalArgumentException: View=com.android.internal.policy.impl.PhoneWindow$DecorView{300e55de V.E..... R.....I. 0,0-0,0} not attached to window manager at android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:434) at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:353) at android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:116) at android.app.Dialog.dismissDialog(Dialog.java:382) at android.app.Dialog.dismiss(Dialog.java:365) at com.creativityapps.gmailbackgroundlibrary.BackgroundMail$SendEmailTask.onPostExecute(BackgroundMail.java:302) at com.creativityapps.gmailbackgroundlibrary.BackgroundMail$SendEmailTask.onPostExecute(BackgroundMail.java:265) at android.os.AsyncTask.finish(AsyncTask.java:636) at android.os.AsyncTask.access$500(AsyncTask.java:177) at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:653) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:194) at android.app.ActivityThread.main(ActivityThread.java:5660) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:963) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:758)

下面是我发送电子邮件的代码

     if (response.body().getStatus().equals("OK")) {

                            snapManager.updateSnapStatus(AssetsManagementContract.SnapEntry.COLUMN_SITE_SNAP, snap.getSnapName(), Constants.SNAP_SYNCED);
                            Intent broadcastSyc = new Intent();
                            broadcastSyc.setAction(Common.GetSyncImageAction());
                            broadcastSyc.putExtra("STATUS", true);
                            mContext.sendBroadcast(broadcastSyc);
                            sendImage(mContext);
                            BackgroundMail.newBuilder(mContext)
                                    .withUsername("gmail id")
                                    .withPassword("pass")
                                    .withMailto("gmail id")
                                    .withType(BackgroundMail.TYPE_PLAIN)
                                    .withSubject("New Meter Installation")
                                    .withBody("Meter #" + msn + " is "+ com+ " and "+ status)
                                    .send();

                        }

我该如何解决这个问题？任何帮助将不胜感激

注意:电子邮件是在提交表单时发送的，保存后我没有使用任何对话框。

更新 1下面是BackgroudMailer类函数

public class SendEmailTask extends AsyncTask<String, Void, Boolean> {
    private ProgressDialog progressDialog;

    public SendEmailTask() { //error onPostExecute(BackgroundMail.java:265)
    }

    protected void onPreExecute() {
        super.onPreExecute();
        if(BackgroundMail.this.processVisibility) {
            this.progressDialog = new ProgressDialog(BackgroundMail.this.mContext);
            this.progressDialog.setMessage(BackgroundMail.this.sendingMessage);
            this.progressDialog.setCancelable(false);
            this.progressDialog.show();
        }

    }

    protected Boolean doInBackground(String... arg0) {
        try {
            GmailSender sender = new GmailSender(BackgroundMail.this.username, BackgroundMail.this.password);
            if(!BackgroundMail.this.attachments.isEmpty()) {
                for(int i = 0; i < BackgroundMail.this.attachments.size(); ++i) {
                    if(!((String)BackgroundMail.this.attachments.get(i)).isEmpty()) {
                        sender.addAttachment((String)BackgroundMail.this.attachments.get(i));
                    }
                }
            }

            sender.sendMail(BackgroundMail.this.subject, BackgroundMail.this.body, BackgroundMail.this.username, BackgroundMail.this.mailto, BackgroundMail.this.type);
        } catch (Exception var4) {
            var4.printStackTrace();
            return Boolean.valueOf(false);
        }

        return Boolean.valueOf(true);
    }

    protected void onPostExecute(Boolean result) {
        super.onPostExecute(result);
        if(BackgroundMail.this.processVisibility) {
            this.progressDialog.dismiss(); // error onPostExecute(BackgroundMail.java:302)
            if(result.booleanValue()) {
                if(!TextUtils.isEmpty(BackgroundMail.this.sendingMessageSuccess)) {
                    Toast.makeText(BackgroundMail.this.mContext, BackgroundMail.this.sendingMessageSuccess, 0).show();
                }

                if(BackgroundMail.this.onSuccessCallback != null) {
                    BackgroundMail.this.onSuccessCallback.onSuccess();
                }
            } else {
                if(!TextUtils.isEmpty(BackgroundMail.this.sendingMessageError)) {
                    Toast.makeText(BackgroundMail.this.mContext, BackgroundMail.this.sendingMessageError, 0).show();
                }

                if(BackgroundMail.this.onFailCallback != null) {
                    BackgroundMail.this.onFailCallback.onFail();
                }
            }
        }

    }
}

问题是我无法编辑它，因为文件已锁定。

Answer 1

在 onPostExecute 中，您关闭对话框而不检查它是否实际显示:

this.progressDialog.dismiss();

为此添加一个 isShowing 检查(以及一个空检查以防万一......)

if (progressDialog != null && progressDialog.isShowing()) { 
   progressDialog.dismiss();
}

我还发现您使用了对上下文的静态引用。那可以lead to memory leaks ，但这只是一个旁注。