java - 显示对话框时应用程序崩溃

Question

尝试调用此方法时出现错误：

        okHttpClient.newCall(request).enqueue(new Callback() {
        @Override
        public void onFailure(Call call, final IOException e) {

            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    showErrorAlert(e.toString());
                }
            });
        }

//The Method:

public void showErrorAlert(String error) {
    AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(ProjectListActivity.this);

    dialogBuilder.setMessage("Hmm, there seems to be an error downloading the project list. " + error);
    dialogBuilder.setCancelable(true);

    dialogBuilder.setPositiveButton(
            "Okay",
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    dialog.cancel();
                }
            });
    AlertDialog alert = dialogBuilder.create();
    alert.show();
}

因此，当调用失败时，它会立即崩溃，这是控制台中的输出：

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.chimesoftware.chime.chimetimemanager, PID: 5770
                  android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@a9b7fff is not valid; is your activity running?
                      at android.view.ViewRootImpl.setView(ViewRootImpl.java:925)
                      at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
                      at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:93)
                      at android.app.Dialog.show(Dialog.java:330)
                      at com.chimesoftware.chime.chimetimemanager.ProjectListActivity.showErrorAlert(ProjectListActivity.java:145)
                      at com.chimesoftware.chime.chimetimemanager.ProjectListActivity$1$1.run(ProjectListActivity.java:77)
                      at android.os.Handler.handleCallback(Handler.java:790)
                      at android.os.Handler.dispatchMessage(Handler.java:99)
                      at android.os.Looper.loop(Looper.java:164)
                      at android.app.ActivityThread.main(ActivityThread.java:6753)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

这可能是由于错误地调用错误吗？或者可能是因为我试图显示的错误类型。

谢谢你。

标签： javaandroiddialogokhttp

Answer 1

if(!((Activity) context).isFinishing()){
    //show dialog here
}