React Native App “Unfortunately Stops" on start in Android emulator

Question

My App “Unfortunately Stops" on start in Android emulator, after react-native-fbsdk package installing and configuring.

I have installed this package as guided in the documentation.

On adb logcat I got this log.

09-18 17:02:05.251  1545  1557 I ActivityManager: START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.exampleproject/.MainActivity (has extras)} from uid 10008 on display 0
09-18 17:02:05.489  1545  2041 I ActivityManager: Start proc 29665:com.exampleproject/u0a67 for activity com.exampleproject/.MainActivity
09-18 17:02:05.518 29665 29665 E AndroidRuntime: Process: com.exampleproject, PID: 29665
09-18 17:02:05.518 29665 29665 E AndroidRuntime: java.lang.RuntimeException: Unable to create application com.exampleproject.MainApplication: A valid Facebook app id must be set in the AndroidManifest.xml or set by calling FacebookSdk.setApplicationId before initializing the sdk.
09-18 17:02:05.518 29665 29665 E AndroidRuntime:    at com.exampleproject.MainApplication.onCreate(MainApplication.java:56)
09-18 17:02:05.732  1545  3286 W ActivityManager:   Force finishing activity com.exampleproject/.MainActivity
09-18 17:02:06.315  1545  1559 W ActivityManager: Activity pause timeout for ActivityRecord{47cc657 u0 com.exampleproject/.MainActivity t51 f}
09-18 17:02:17.062  1545  1559 W ActivityManager: Activity destroy timeout for ActivityRecord{47cc657 u0 com.exampleproject/.MainActivity t51 f}

As I understand this log is says A valid Facebook app id must be set in the AndroidManifest.xml. I have set facebook app correctly.

I have added this below line in strings.xml

<string name="facebook_app_id">realFBappID</string>

And Added a meta-data element to the application element

<application android:label="@string/app_name" ...>
    ...
    <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>
    ...
</application>

Every thing seems correct to me. Even though app is not working. Please guide what could the issue here....

Answer 1

create app at facebook and add it's id enter link description here in strings.xml

<resources>
   <string name="facebook_app_id">someid...</string> // you need to add real Facebook app id and wrap it in resources
</resources>

in android

<meta-data
  android:name="com.facebook.sdk.ApplicationId"
  android:value="@string/facebook_app_id"
/>