App is not indexable by Google Search; consider adding at least one Activity with an ACTION-VIEW intent-filler. See issue explanation for more details.
Adds deep links to get your app into the Google index, to get installs and traffic to your app from Google Search.
看详细信息，意思是Activity可以添加ACTION-VIEW来支持Google的deep links，点击链接可以打开我们的App并跳转到相应的界面，还可以传递数据显示具体的页面。
具体使用参考官方文档：https://developer.android.com/training/app-links/deep-linking#java
第一步：声明相关的intent-filter
<activity
android:name="com.example.android.GizmosActivity">
<intent-filter android:label="@string/filter_view_http_gizmos">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<!-- Accepts URIs that begin with "http://www.example.com/gizmos” -->
<data android:scheme="http"
android:host="www.example.com"
android:pathPrefix="/gizmos" />
<!-- note that the leading "/" is required for pathPrefix-->
</intent-filter>
</activity>
第二步：在对应的Activity做接收数据的处理
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Intent intent = getIntent();
String action = intent.getAction();
Uri data = intent.getData();
}
第三步：可以通过adb shell 测试
adb shell am start
-W -a android.intent.action.VIEW
-d <URI> <PACKAGE>
adb shell am start
-W -a android.intent.action.VIEW
-d "http://www.example.com/gizmos" com.example.android
最后，如果不需要使用此功能，又有强迫症，不想报黄提示，在application标签简单的添加这个就行了
tools:ignore="GoogleAppIndexingWarning"
