QuickContactBadge crashes app:

Question

I have searched around but none of the solutions worked for my specific case. If I add

QuickContactBadge contactBadge = (QuickContactBadge) findViewById(R.id.quickContactBadge);

I it crashes. Then I changed it to:

    QuickContactBadge contactBadge;

    protected void onCreate(Bundle savedInstanceState) {

            ...

            contactBadge = (QuickContactBadge) findViewById(R.id.quickContactBadge);
    }

And it doesn't crash. But if I add contactBadge.Anything(); it crashes. No matter what method it crashes. I.E. contactBadge.assignContactFromEmail("[email protected]", true);

Android Activity:

    public class MainActivity extends Activity {

            QuickContactBadge contactBadge;

            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);

                setContentView(R.layout.activity_main);

                if (savedInstanceState == null) {

                    getFragmentManager().beginTransaction().add(R.id.container, new MainFragment()).commit();
                }

                contactBadge = (QuickContactBadge) findViewById(R.id.quickContactBadge);
                contactBadge.assignContactFromEmail("[email protected]", true);
            }

            public static class MainFragment extends Fragment {

            public MainFragment() {

            }

            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

                View rootView = inflater.inflate(R.layout.fragment_main, container, false);

                return rootView;
            }
        }

Manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.pointlight.android.kingdomcraft"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="19" />

    <uses-permission android:name="android.permission.READ_CONTACTS" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/android:Theme.Holo.NoActionBar" >
        <activity
            android:name="com.pointlight.android.kingdomcraft.MainActivity"
            android:label="@string/app_name"
            android:screenOrientation="landscape" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Layout:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.pointlight.android.kingdomcraft.MainActivity$MainFragment" >


    <QuickContactBadge
        android:id="@+id/quickContactBadge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

Answer 1

First method: You're calling findViewById() when the activity is instantiated and its member variables are initialized. The activity won't have a Window yet and it will NPE. Call findViewById() only in onCreate() or later, after setContentView().

Second method: You don't have setContentView() with a view hierarchy that has a view with the given id. null is returned and invoking method on it will NPE.

From the code you later added, it seems the view is in your fragment layout and not the activity layout. It won't be a part of the activity view hierarchy in onCreate(). You should move the code to the fragment's onCreateView() instead:

View rootView = inflater.inflate(R.layout.fragment_main, container, false);
contactBadge = (QuickContactBadge) rootView.findViewById(R.id.quickContactBadge);
contactBadge.assignContactFromEmail("[email protected]", true);