安卓AlertDialog与BadTokenException崩溃？

Question

这是我的第一篇文章，请耐心等待。我是一名高中开发者，最近在play商店上发布了一款Android应用程序。我使用Crashlytics来捕获异常，出于某种原因，它抛出了这个错误。

Fatal Exception: android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@1989547c is not valid; is your activity running?

在5.0、5.0.2、5.1.1和6.0.1版本的LG D855、Nexus5和华为AL10上都有相关报道。我在网上看过，发现当一个活动不存在时，就会发生这种情况。此错误发生在应用程序的初始启动时。

下面是我用于报警对话框的代码，它只是询问用户是否想要查看教程(y/n)

public void showTutorialDialog() {
    AlertDialog tutorialDialog = new AlertDialog.Builder(this)
            .setTitle(R.string.tutorial_question_title)
            .setCancelable(false)
            .setMessage(R.string.tutorial_question)
            .setPositiveButton(getResources().getString(R.string.tutorial_question_pos), new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // Take to tutorial
                    // Assume isn't backer for now..
                    finish();
                    Intent i = new Intent(StartupActivity.this, TutorialActivity.class);
                    i.putExtra("from", "StartupActivity");
                    startActivity(i);
                }
            })
            .setNegativeButton(getResources().getString(R.string.tutorial_question_neg), new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // No tutorial, ask if they are a backer
                    showBackerDialog();
                }
            }).show();

在应用程序初始启动时，我在一个单独的类中使用IabHelper加载用户的购买详细信息。这个类称为PurchaseRetriever，它异步检索用户购买的内容并将其存储在ArrayList中。这就是我的代码的工作方式。

            if (mManager.isUserFirstTime()) {
                // Initialize purchase retriever.
                // The rest will be done when the observer reports that purchase data has been retrieved.
                mPurchases = PurchaseRetriever.getInstance(StartupActivity.this);
                mPurchases.addObserver(new FirstStartupObserver(this));
                StartupManager.FIRST = true;
                loadImageContent();

它使用观察者模式运行，所以当查询购买详细信息时，它调用FirstStartupObserver中的更新()方法，然后通过对StartupActivity的引用，在发生错误的地方调用startupActivity.showTutorialDialog();。

我已经在我和我朋友个人拥有的多个设备上进行了测试(Nexus 6，Nexus 5，Nexus 7平板电脑，三星Galaxy Tab，三星远程实验室的各种设备)，但它在我这一端工作得很好……任何建议，谢谢。

编辑:这里是StartupActivity。

/**
 * Main startup activity. Determines which activity to launch.
 * Puts the user in one place or another depending on if they are a backer.
 */
public class StartupActivity extends AppCompatActivity {

    private StartupManager mManager;
    private ProgressBar bar;

    // --- Used if first time app loading to query purchase info
    private PurchaseRetriever mPurchases;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        // Used in either cases
        // If first time, displayed, if not, hidden//
        //hideNavBar();
        User.init(this);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_startup);
        bar = (ProgressBar)this.findViewById(R.id.progressBar);
        mManager = new StartupManager(this);

        // Returns true if data was corrupt before
        if (mManager.isDataCorrupt()) {
            bar.setVisibility(View.VISIBLE);
            loadImageContent();
            // Reset watch to default black
            // Internally starts NewMainActivity
            ErrorManager.fixCorruptData(bar, this);
        } else {
            // Stays true until user selects watch
            if (mManager.isUserFirstTime()) {
                // Initialize purchase retriever.
                // The rest will be done when the observer reports that purchase data has been retrieved.
                mPurchases = PurchaseRetriever.getInstance(StartupActivity.this);
                mPurchases.addObserver(new FirstStartupObserver(this));
                StartupManager.FIRST = true;
                loadImageContent();
            } else {
                // NOT first time starting app.
                mPurchases = PurchaseRetriever.getInstance(StartupActivity.this);
                mPurchases.addObserver(new AfterFirstStartupObserver(this));
                loadImageContent();
            }
        }


    }

    // Two main dialogs used
    public void showTutorialDialog() {
        AlertDialog tutorialDialog = new AlertDialog.Builder(this)
                .setTitle(R.string.tutorial_question_title)
                .setCancelable(false)
                .setMessage(R.string.tutorial_question)
                .setPositiveButton(getResources().getString(R.string.tutorial_question_pos), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // Take to tutorial
                        // Assume isn't backer for now..
                        finish();
                        Intent i = new Intent(StartupActivity.this, TutorialActivity.class);
                        i.putExtra("from", "StartupActivity");
                        startActivity(i);
                    }
                })
                .setNegativeButton(getResources().getString(R.string.tutorial_question_neg), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // No tutorial, ask if they are a backer
                        showBackerDialog();
                    }
                }).show();

        tutorialDialog.getButton(AlertDialog.BUTTON_NEGATIVE).setTextColor(Color.RED);
        tutorialDialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(Color.RED);
    }
    private void showBackerDialog() {
        // Show AlertDialog ask if they are kickstarter backer
        AlertDialog askDialog = new AlertDialog.Builder(this)
                .setTitle(getResources().getString(R.string.startup_dialog_title))
                .setCancelable(false)
                .setMessage(getResources().getString(R.string.startup_dialog_message))
                .setPositiveButton(getResources().getString(R.string.startup_dialog_pos), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // User is a backer, take to watch chooser screen, then it takes to login screen
                        // Also look at Timer with TimerTask
                        new Thread(new Runnable() {
                            @Override
                            public void run() {
                                try {
                                    Intent i = new Intent(StartupActivity.this, WatchChooserActivity.class);
                                    i.putExtra("from", "StartupActivityBacker");
                                    startActivity(i);
                                } finally {
                                    finish();
                                }
                            }
                        }).start();
                    }
                })
                .setNegativeButton(getResources().getString(R.string.startup_dialog_neg), new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // User is not a backer, take to MainActivity

                        new Thread(new Runnable() {

                            @Override
                            public void run() {
                                try {
                                    Intent i = new Intent(StartupActivity.this, WatchChooserActivity.class);
                                    i.putExtra("from", "StartupActivityNonBacker");
                                    startActivity(i);
                                } finally {
                                    finish();
                                }
                            }
                        }).start();
                    }
                }).show();

        askDialog.getButton(AlertDialog.BUTTON_NEGATIVE).setTextColor(Color.RED);
        askDialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(Color.RED);
    }

下面是FirstStartupObserver的代码。

public class FirstStartupObserver implements Observer {
    private StartupActivity startupActivity;
    public FirstStartupObserver(StartupActivity startupActivity) {
        this.startupActivity = startupActivity;
    }

    // Called when the observable is done loading purchase detail
    // (Only called when user runs app first time)
    @Override
    public void update(Observable observable, Object data) {
        // Set default first-time watch
        //  Query product data (the Watchfaces purchased in the form of a WatchFace object)
        PurchaseRetriever mPurchases = PurchaseRetriever.getInstance(startupActivity);
        if (mPurchases.hasSuccess()) {
            ArrayList<DynamicLoader.WatchFace> facesOwned = mPurchases.getPurchasedFaces();
            for (DynamicLoader.WatchFace f : facesOwned) {
                f.setPurchased(true);
            }
            // Check if coming from v1.4
            if (UpgradeManager.isUpgrading(startupActivity)) {
                // Then it calls the code below, but after the async task.
                String accessCode = UpgradeManager.getOldAccessCode(startupActivity);
                String accessToken = UpgradeManager.getOldAccessToken(startupActivity);
                UpgradeManager.migrateBacker(startupActivity, accessCode, accessToken);
            } else {
                // Ask if they want to see tutorial.
                // This is when the exception occurs!!!

                startupActivity.showTutorialDialog();

            }
            return;
        } else {
            Log.d("TAG", "Showing fail dialog");
            DialogUtils.showIabFailDialog(startupActivity, this);
        }
    }
}

Answer 1

令牌android.os.BinderProxy@1989547c无效；您的活动是否正在运行？

当活动不存在时，您正试图过早地加载AlertDialog！在我的应用程序中，当活动生命周期完成时，我会加载一个小教程：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.splash_screen);

    ...
    ...
    ...

    showTutorialDialog();
}

Answer 2

令牌android.os.BinderProxy@1989547c无效；您的活动是否正在运行？

这意味着当你的活动被销毁或销毁后，你正试图显示你的弹出窗口。

您可以检查您的活动isDestroyed是否如下所示：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 && !isDestroyed()) {
    showTutorialDialog();
}

如果你支持API17以下的设备，你可以尝试在其他情况下使用isFinishing。我没有测试它是否像预期的那样工作。(如果我错了，请纠正我。)

else {
        if (!isFinishing()) { 
             showTutorialDialog();
         }
   }

或者，为了快速修复，您可以使用try catch

Answer 3

这通常是由于在AsyncTask或其他后台任务中执行某些操作导致的，这些任务包含对Activity的引用，并在工作完成时尝试显示对话框。在这种情况下，听起来您的FirstStartupObserver持有对活动的引用并试图显示一个对话框，但在PurchaseRetriever完成其工作时，该活动可能已被销毁。

不要试图测试活动状态，也不要捕获BadTokenException。这只是掩盖了问题。最简单的解决方案是在活动暂停时取消PurchaseRetriever。如果您希望后台工作在配置更改(如轮换)中幸存下来，但仍限于活动的用户感知生命周期，请在保留的片段中执行工作。最后，如果当用户在活动之间导航或将应用程序放在后台时，后台工作应该继续，请在Service中完成工作，并将结果保存到活动可以检索的位置。