title: Add Google map programmatically to Relative layout
body: <p>I am trying to add Google Map at runtime to a particular layout.</p>
  
  <pre><code>mMapFragment = SupportMapFragment.newInstance();
  FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
  fragmentTransaction.add(android.R.id.content, mMapFragment, MAP_FRAGMENT_TAG);
  mainLayout.addView(mMapFragment);
  </code></pre>
  
  <p>At the time of adding <strong>mainLayout.addView(mMapFragment)</strong> it shows null pointer error.</p>
  
  <p>Errors</p>
  
  <pre><code>(19:34) amitsharma.cssoft: 09-30 19:23:40.457: E/AndroidRuntime(16595): FATAL EXCEPTION: main
  09-30 19:23:40.457: E/AndroidRuntime(16595): java.lang.NullPointerException
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at android.view.ViewGroup.addView(ViewGroup.java:1821)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at android.view.ViewGroup.addView(ViewGroup.java:1808)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at com.example.project_katchup.Settings.ShowCurrentLocation(Settings.java:222)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at com.example.project_katchup.Settings.access$0(Settings.java:211)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at com.example.project_katchup.Settings$1.onClick(Settings.java:151)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at android.view.View.performClick(View.java:2538)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at android.view.View$PerformClick.run(View.java:9152)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at android.os.Handler.handleCallback(Handler.java:587)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at android.os.Handler.dispatchMessage(Handler.java:92)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at android.os.Looper.loop(Looper.java:130)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at android.app.ActivityThread.main(ActivityThread.java:3687)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at java.lang.reflect.Method.invokeNative(Native Method)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at java.lang.reflect.Method.invoke(Method.java:507)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
  09-30 19:23:40.457: E/AndroidRuntime(16595):    at dalvik.system.NativeStart.main(Native Method)
  09-30 19:28:46.757: I/Process(16595): Sending signal. PID: 16595 SIG: 9
  </code></pre>