title: Android infalter add view to layout
body: <p>Im trying to add a view which consist of a background and a moving cloud to a layout that has buttons and checkboxes. I tried getLayoutInflater to merge both of them togather but it forced close. here is MainActivity code:</p>
  
  <pre><code>public class MainActivity extends Activity{
  
  MyCloud myView;
  float x, y;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      myView = new MyCloud(this);
      getWindow().setFormat(PixelFormat.RGBA_8888);
      setContentView(myView);
  
  
      View view = getLayoutInflater().inflate(R.layout.activity_main, null, false);
  
      this.addContentView(view, null);
  }
  }
  </code></pre>
  
  <p>Here is the View activity:</p>
  
  <pre><code>public class MyCloud extends View{
  
  Bitmap cloud;
  int ChangingX;
  int ChangingY;
  int x, y;
  
  BitmapFactory.Options options;
  Bitmap preparedBitmap;
  
  public MyCloud(Context context) {
      // TODO Auto-generated constructor stub
      super(context);
  
      setFocusable(true);
  
      options = new BitmapFactory.Options();
      options.inPreferredConfig = Bitmap.Config.ARGB_8888;
      options.inDither = true;
      options.inScaled = false;
      options.inDither = false;
      options.inPurgeable = true;
      preparedBitmap = BitmapFactory.decodeResource(getResources(),
              R.drawable.bg, options);
      Log.d("bitmap", String.valueOf(preparedBitmap));
  
      cloud = BitmapFactory.decodeResource(getResources(), R.drawable.cloud);
  
      ChangingX = 50;
      ChangingY = 50;
      x = 0;
      y = 0;
  }
  
  @Override
  protected void onDraw(Canvas canvas) {
      // TODO Auto-generated method stub
      super.onDraw(canvas);
      canvas.drawBitmap(preparedBitmap, 0, 0, null); // for background
      canvas.drawBitmap(cloud, ChangingX , 50, null); // for cloud 
      if (ChangingX &lt; canvas.getWidth())
          ChangingX += 2;
      else
          ChangingX = 50;
  
      invalidate();
  
  }
  
  }
  </code></pre>
  
  <p>The layout Code:</p>
  
  <pre><code>&lt;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"
  android:background="@drawable/bg"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".MainActivity" &gt;
  
  &lt;Button
      android:id="@+id/button1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentBottom="true"
      android:layout_alignParentRight="true"
      android:layout_marginBottom="170dp"
      android:layout_marginRight="58dp"
      android:text="Button" /&gt;
  
  &lt;CheckBox
      android:id="@+id/checkBox1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignBaseline="@+id/button1"
      android:layout_alignBottom="@+id/button1"
      android:layout_alignParentLeft="true"
      android:layout_marginLeft="27dp"
      android:text="CheckBox" /&gt;
  
   &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>The error I have:</p>
  
  <pre><code>06-15 12:34:20.801: E/AndroidRuntime(528): FATAL EXCEPTION: main
  06-15 12:34:20.801: E/AndroidRuntime(528): 
  java.lang.RuntimeException: Unable to start activity
  ComponentInfo{com.cloud/com.cloud.MainActivity}: java.lang.NullPointerException
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.os.Handler.dispatchMessage(Handler.java:99)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.os.Looper.loop(Looper.java:123)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.app.ActivityThread.main(ActivityThread.java:4627)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at java.lang.reflect.Method.invokeNative(Native Method)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at java.lang.reflect.Method.invoke(Method.java:521)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at dalvik.system.NativeStart.main(Native Method)
  06-15 12:34:20.801: E/AndroidRuntime(528): Caused by: java.lang.NullPointerException
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.view.ViewGroup$LayoutParams.&lt;init&gt;(ViewGroup.java:3573)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.view.ViewGroup$MarginLayoutParams.&lt;init&gt;(ViewGroup.java:3723)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.widget.FrameLayout$LayoutParams.&lt;init&gt;(FrameLayout.java:487)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at    android.widget.FrameLayout.generateLayoutParams(FrameLayout.java:431)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.view.ViewGroup.addViewInner(ViewGroup.java:1975)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.view.ViewGroup.addView(ViewGroup.java:1865)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.view.ViewGroup.addView(ViewGroup.java:1845)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at com.android.internal.policy.impl.PhoneWindow.addContentView(PhoneWindow.java:229)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.app.Activity.addContentView(Activity.java:1681)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at com.cloud.MainActivity.onCreate(MainActivity.java:35)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
  06-15 12:34:20.801: E/AndroidRuntime(528):  
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
  06-15 12:34:20.801: E/AndroidRuntime(528):  ... 11 more
  </code></pre>
  
  <p>Now I have never used getLayoutInflater before so can you please be patient with me and show me in Code how I can fix this problem or if there is any alternative way to add the view to the layout. Thanks in advance</p>