public class ResizeLayout extends LinearLayout{ 
  private static int count = 0; 
  public ResizeLayout(Context context, AttributeSet attrs) { 
   super(context, attrs); 
  } 
 @Override 
  protected void onSizeChanged(int w, int h, int oldw, int oldh) {  
   super.onSizeChanged(w, h, oldw, oldh); 
   Log.e("onSizeChanged " + count++, "=>onResize called! w="+w + ",h="+h+",oldw="+oldw+",oldh="+oldh); 
  } 
  @Override 
  protected void onLayout(boolean changed, int l, int t, int r, int b) { 
   super.onLayout(changed, l, t, r, b); 
   Log.e("onLayout " + count++, "=>OnLayout called! l=" + l + ", t=" + t + ",r=" + r + ",b="+b); 
  } 
  @Override 
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
   super.onMeasure(widthMeasureSpec, heightMeasureSpec); 
   Log.e("onMeasure " + count++, "=>onMeasure called! widthMeasureSpec=" + widthMeasureSpec + ", heightMeasureSpec=" + heightMeasureSpec); 
}

<com.winuxxan.inputMethodTest.ResizeLayout 
  xmlns:android="http://schemas.android.com/apk/res/android" 
  android:id="@+id/root_layout" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  android:orientation="vertical" 
  > 
  <EditText 
   android:layout_width="fill_parent" 
   android:layout_height="wrap_content" 
  /> 
  <LinearLayout 
    android:id="@+id/bottom_layout" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" 
    android:gravity="bottom">s 
  <TextView  
   android:layout_width="fill_parent" 
   android:layout_height="wrap_content" 
   android:text="@string/hello" 
   android:background="#77777777" 
  /> 
 </LinearLayout> 
</com.winuxxan.inputMethodTest.ResizeLayout>

public class ResizeLayout extends LinearLayout{ 
  private OnResizeListener mListener; 
  public interface OnResizeListener { 
   void OnResize(int w, int h, int oldw, int oldh); 
  } 
  public void setOnResizeListener(OnResizeListener l) { 
   mListener = l; 
  } 
  public ResizeLayout(Context context, AttributeSet attrs) { 
   super(context, attrs); 
  } 
  @Override 
  protected void onSizeChanged(int w, int h, int oldw, int oldh) {  
   super.onSizeChanged(w, h, oldw, oldh); 
   if (mListener != null) { 
    mListener.OnResize(w, h, oldw, oldh); 
   } 
  } 
}

public class InputMethodTestActivity extends Activity { 
  private static final int BIGGER = 1; 
  private static final int SMALLER = 2; 
  private static final int MSG_RESIZE = 1; 
  private static final int HEIGHT_THREADHOLD = 30; 
  class InputHandler extends Handler { 
   @Override 
   public void handleMessage(Message msg) { 
    switch (msg.what) { 
    case MSG_RESIZE: { 
     if (msg.arg1 == BIGGER) { 
      findViewById(R.id.bottom_layout).setVisibility(View.VISIBLE); 
     } else { 
      findViewById(R.id.bottom_layout).setVisibility(View.GONE); 
     } 
    } 
     break; 
    default: 
     break; 
    } 
    super.handleMessage(msg); 
   } 
  } 
  private InputHandler mHandler = new InputHandler(); 
  /** Called when the activity is first created. */ 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
   super.onCreate(savedInstanceState); 
   setContentView(R.layout.main); 
   ResizeLayout layout = (ResizeLayout) findViewById(R.id.root_layout); 
   layout.setOnResizeListener(new ResizeLayout.OnResizeListener() { 
    public void OnResize(int w, int h, int oldw, int oldh) { 
     int change = BIGGER; 
     if (h < oldh) { 
      change = SMALLER; 
     } 
     Message msg = new Message(); 
     msg.what = 1; 
     msg.arg1 = change; 
     mHandler.sendMessage(msg); 
    } 
   }); 
  } 
}