Firebase动态链接，使用一次后将其清除 [英] Firebase dynamic link, clear it after using once

问题描述

https://firebase.google.com/docs/dynamic-links/android/receive

声明

调用getDynamicLink()检索链接并清除该数据，以便 它只会由您的应用处理一次.

Calling getDynamicLink() retrieves the link and clears that data so it is only processed once by your app.

您通常会在主活动以及任何其他活动中调用getDynamicLink() 由与链接匹配的意图过滤器启动的活动.

You normally call getDynamicLink() in the main activity as well as any activities launched by intent filters that match the link.

我从文档中复制了以下代码.

I copied the following code from the doc.

FirebaseDynamicLinks.getInstance()
        .getDynamicLink(getIntent())
        .addOnSuccessListener(this, new OnSuccessListener<PendingDynamicLinkData>() {
            @Override
            public void onSuccess(PendingDynamicLinkData pendingDynamicLinkData) {
                // Get deep link from result (may be null if no link is found)
                Uri deepLink = null;
                if (pendingDynamicLinkData != null) {
                    deepLink = pendingDynamicLinkData.getLink();
                }


                // Handle the deep link. For example, open the linked
                // content, or apply promotional credit to the user's
                // account.
                // ...

                // ...
            }
        })
        .addOnFailureListener(this, new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.w(TAG, "getDynamicLink:onFailure", e);
            }
        });

如果将上面的代码放在MainActivity:onCreate

If I put the above code on MainActivity:onCreate

• 当应用未在后台运行时，深层链接可以正常工作
• 当应用在后台运行时，无法识别深层链接(不会调用onSuccess回调)

• when app is not running in background, deep link works fine
• when app is running in background, deep link is not recognized (the onSuccess callback doesn't get called)

如果我将上面的代码放在MainActivity:onStart

If I put the above code on MainActivity:onStart

• 无论应用是否在后台运行，深层链接都可以正常工作
• 如果用户单击深层链接，则主要活动会获取该链接并打开适当的活动(正常)，但是当他尝试返回主要活动时，onSuccess回调会再次触发，并且他将永远无法进入主要活动活动.

• when app is running in background or not, deep link works fine
• If user clicks deep link, main activity gets it and opens approapriate activity, (works fine) but when he tries to go back to the main activity, onSuccess callback fires again and he never be able to go to the main activity.

推荐答案

在MainActivity:onNewIntent方法内部复制用MainActivity:onCreate方法编写的代码(与Firebase Dynamic Links相关的整个代码)，无论该应用程序是否在是否有背景.

Duplicate the code written in MainActivity:onCreate method (entire Firebase Dynamic Links related code) inside MainActivity:onNewIntent method, this works irrespective of the app is running in the background or not.

MainActivity:onNewIntent方法，因此不会发生重复的Firebase调用.

Also MainActivity:onNewIntent method is not invoked if the app is not present in background hence no duplicate Firebase call happens.

您的 MainActivity 应该看起来像这样

@Override
protected void onCreate(Bundle savedInstanceState) {
    //...

    FirebaseDynamicLinks.getInstance()
            .getDynamicLink(getIntent())
            .addOnSuccessListener(this, new OnSuccessListener<PendingDynamicLinkData>() {
                @Override
                public void onSuccess(PendingDynamicLinkData pendingDynamicLinkData) {
                    // Get deep link from result (may be null if no link is found)
                    Uri deepLink = null;
                    if (pendingDynamicLinkData != null) {
                        deepLink = pendingDynamicLinkData.getLink();
                    }


                    // Handle the deep link. For example, open the linked
                    // content, or apply promotional credit to the user's
                    // account.
                    // ...


            })
            .addOnFailureListener(this, new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Log.w(TAG, "getDynamicLink:onFailure", e);
                }
            });
}

@Override
protected void onNewIntent(Intent intent) {
    //...

    FirebaseDynamicLinks.getInstance()
            .getDynamicLink(intent)
            .addOnSuccessListener(this, new OnSuccessListener<PendingDynamicLinkData>() {
                @Override
                public void onSuccess(PendingDynamicLinkData pendingDynamicLinkData) {
                    // Get deep link from result (may be null if no link is found)
                    Uri deepLink = null;
                    if (pendingDynamicLinkData != null) {
                        deepLink = pendingDynamicLinkData.getLink();
                    }


                    // Handle the deep link. For example, open the linked
                    // content, or apply promotional credit to the user's
                    // account.
                    // ...


            })
            .addOnFailureListener(this, new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Log.w(TAG, "getDynamicLink:onFailure", e);
                }
            });
}

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