H5 open the app. If the app is not downloaded, jump to the download page. If the app has been downloaded, wake up the app

Android :

h5 Wake up Android :

Android configuration :

<activity android:name=".TestActivity">
    <intent-filter>
        <action android:name="android.intent.action.VIEW"/>
        <category android:name="android.intent.category.DEFAULT"/>
        <category android:name="android.intent.category.BROWSABLE"/>
        <data android:scheme="myapp" android:host="myhost">
        </data>
    </intent-filter>
</activity>

artifacts intent character string ：

intent:
myhost                                                //  specific schema uri, for example login Means open app  Native landing page 
#Intent;
    package=com.lcp.testweb;                          // apk Package name 
    action=android.intent.action.VIEW;               //  page action
    category=android.intent.category.DEFAULT;        //  Page type 
    scheme=myapp;                                     //  Protocol type 
    S.browser_fallback_url=https://www.baidu.com  // Optional ,schema Jump page when starting the client fails , Generally, it is a download page , Need to pass encodeURIComponent code 
end;

h5:

Construct a a label , The above schame String as its href value , When you click a When labeling , That is, through schema Open a client login page , If the client is not installed , Will jump to the specified page , This will jump to the download page

<a href="intent://myhost#Intent;scheme=myapp;package=com.lcp.testweb;category=android.intent.category.DEFAULT;action=android.intent.action.VIEW;S.browser_fallback_url=http%3A%2F%2Fwww.baidu.com;end"> open test</a>

If necessary, the configuration can be js Tune up , Be sure to configure the following sentence

<category android:name="android.intent.category.BROWSABLE"></category>

Jump to the download page without downloading , Wake up if it has been downloaded APP Solution
If you don't download , I can't open it , Time delay 5 Seconds to detect if the browser is backed out of the background , It means that it is opened app, If 5 Seconds later, if the browser is not set to the background, it means that the jump is not successful , That means it's not installed

Here is a case : You can click here

IOS:

[scheme]://[host]/[path]?[query]
scheme from  ios Students provide 
 for example :
myapp://fanyi.baidu.com/translate?aldtype=16047
 Paste it directly into the browser to open it