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Android: Branch.io Tutorial: Branch.getAutoInstance (this);

I am trying to get Branch.io to work on Android, but I am facing:

myapplication.MainActivity cannot be cast to android.app.Application

Then I changed:

 Branch.getAutoInstance(this);

To:

 Branch.getInstance();


In onCreate Activity.

Then I get:

 java.lang.NullPointerException: Attempt to invoke virtual method 'boolean io.branch.referral.Branch.initSession(io.branch.referral.Branch$BranchReferralInitListener, android.net.Uri, android.app.Activity)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)

Can you help me get started and get started?

Below is my AndroidManifest.xml: (note: the key_ branch was added in my application code)

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.x.myapplication"> <uses-permission android:name="android.permission.INTERNET" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <meta-data android:name="io.branch.sdk.BranchKey" android:value="key_live_xxxxxxxxxxxxxxx" /> <activity android:name=".MainActivity"> <intent-filter> <data android:scheme="yourapp" android:host="open" /> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" /> <category android:name="android.intent.category.BROWSABLE" /> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <receiver android:name="io.branch.referral.InstallListener" android:exported="true"> <intent-filter> <action android:name="com.android.vending.INSTALL_REFERRER" /> </intent-filter> </receiver> </application> </manifest>


My main activity:

 package com.example.chg.myapplication; import android.app.Activity; import android.os.Bundle; import android.content.Intent; import android.util.Log; import org.json.JSONObject; import io.branch.referral.Branch; import io.branch.referral.BranchError; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Branch.getAutoInstance(this); Branch.getInstance(); setContentView(R.layout.activity_main); } @Override public void onStart() { super.onStart(); Branch branch = Branch.getInstance(); branch.initSession(new Branch.BranchReferralInitListener(){ @Override public void onInitFinished(JSONObject referringParams, BranchError error) { if (error == null) { // params are the deep linked params associated with the link that the user clicked -> was re-directed to this app // params will be empty if no data found // ... insert custom logic here ... } else { Log.i("MyApp", error.getMessage()); } } }, this.getIntent().getData(), this); } @Override public void onNewIntent(Intent intent) { this.setIntent(intent); } }
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1 answer

Alex with Branch.io here:

We recently made some changes to our tutorial, and it looks like we missed a few things. I appreciate that you are posting about this - we will click on the update later today for more clarity.

In this particular case, there are two problems:

  • Mixing between Applied onCreate() and Operations onCreate() , none of which are needed for the base implementation.
  • There is no application class (we accidentally deleted this step from our tutorial completely - my apologies).

To get started, update your files as follows:

AndroidManifest.xml

You have three options:

1. Use the Branch application class (easiest)

If you don't have a special application class yet, this is the easiest approach. Add android:name="io.branch.referral.BranchApp" to the Application class:

Edit: UPDATED snippet for comments below

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.chg.appbranch_01"> <meta-data android:name="io.branch.sdk.BranchKey" android:value="xxx" /> <uses-permission android:name="android.permission.INTERNET" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme" android:name="io.branch.referral.BranchApp"> <!--Enable test mode to see debugging data (https://dev.branch.io/getting-started/integration-testing/guide/android/#use-debug-mode-to-simulate-fresh-installs)--> <meta-data android:name="io.branch.sdk.TestMode" android:value="true" /> <meta-data android:name="io.branch.sdk.BranchKey" android:value="key_live_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" /> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> <intent-filter> <data android:scheme="theapp" android:host="open" /> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" /> <category android:name="android.intent.category.BROWSABLE" /> </intent-filter> </activity> <receiver android:name="io.branch.referral.InstallListener" android:exported="true"> <intent-filter> <action android:name="com.android.vending.INSTALL_REFERRER" /> </intent-filter> </receiver> </application> </manifest>

2. Extend the Application class with the BranchApp class

If you already have your own application class, this is the easiest approach. Your AndroidManifext.xml file will look like this:

 <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme" android:name="com.your.app.CustomApplicationClass" >

Your own application class ( CustomApplicationClass in the above example) would look like this:

 public final class CustomApplicationClass extends YourApp { @Override public void onCreate() { super.onCreate(); } }

3. Integrate directly into your own application class

The most customizable approach for advanced implementations. You will have your AndroidManifext.xml file the same as above:

 <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme" android:name="com.your.app.CustomApplicationClass" >

And then configure your application class as follows:

 public final class CustomApplicationClass { @Override public void onCreate() { super.onCreate(); Branch.getAutoInstance(this); } }

Activity determination

Remove the onCreate() calls. They are not needed here and are actually the cause of your error message ( Branch.getAutoInstance(this) passed an Activity context like this when the SDK was expecting the Application context from option 3 above).

 import io.branch.referral.Branch; import io.branch.referral.BranchError; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Override public void onStart() { super.onStart(); Branch branch = Branch.getInstance(); branch.initSession(new Branch.BranchReferralInitListener(){ @Override public void onInitFinished(JSONObject referringParams, BranchError error) { if (error == null) { // params are the deep linked params associated with the link that the user clicked -> was re-directed to this app // params will be empty if no data found // ... insert custom logic here ... } else { Log.i("MyApp", error.getMessage()); } } }, this.getIntent().getData(), this); } @Override public void onNewIntent(Intent intent) { this.setIntent(intent); } }

Sorry for the inconvenience!

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