public class Main4Activity extends Activity {

     private TextView tv1;

     private Button button1;

     private RelativeLayout rlMain;

     private int mHeight = 0;

     int topHide;

     int topShow;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main4);

         rlMain = (RelativeLayout) findViewById(R.id.rlMain);

         tv1 = (TextView) findViewById(R.id.tv1);

         tv1.setVisibility(View.GONE);

         button1 = (Button) findViewById(R.id.button1);

         final LayoutTransition transitioner = new LayoutTransition();

         transitioner.setDuration(150);

         rlMain.setLayoutTransition(transitioner);

         mHeight = getResources().getDisplayMetrics().heightPixels

                 - getStatusBarHeight(this);

         getWindow().getDecorView().addOnLayoutChangeListener(

                 new View.OnLayoutChangeListener() {

                     @Override

                     public void onLayoutChange(View arg0, int arg1, int arg2,

                             int arg3, int arg4, int arg5, int arg6, int arg7,

                             int arg8) {

                         //计算显示时y坐标

                         topShow = mHeight - dip2px(Main4Activity.this, 70)

                                 - getActionBar().getHeight();

                         //计算隐藏时y坐标

                         topHide = mHeight - getActionBar().getHeight();

                         // VISIBLE

                         ObjectAnimator customAppearingAnim = ObjectAnimator

                                 .ofFloat(null, "y", topHide, topShow);

                         customAppearingAnim

                                 .addListener(new AnimatorListenerAdapter() {

                                     public void onAnimationEnd(Animator anim) {

                                         View view = (View) ((ObjectAnimator) anim)

                                                 .getTarget();

                                         view.setY(topShow);

                                     }

                                 });

                         // GONE

                         ObjectAnimator customDisappearingAnim = ObjectAnimator

                                 .ofFloat(null, "y", topShow, topHide);

                         customDisappearingAnim

                                 .addListener(new AnimatorListenerAdapter() {

                                     public void onAnimationEnd(Animator anim) {

                                         View view = (View) ((ObjectAnimator) anim)

                                                 .getTarget();

                                         view.setY(topHide);

                                     }

                                 });

                         transitioner.setAnimator(LayoutTransition.APPEARING,

                                 customAppearingAnim);

                         transitioner.setAnimator(LayoutTransition.DISAPPEARING,

                                 customDisappearingAnim);

                     }

                 });

         button1.setOnClickListener(new OnClickListener() {

             @Override

             public void onClick(View arg0) {

                 if (tv1.getVisibility() == View.GONE) {

                     tv1.setVisibility(View.VISIBLE);

                 } else {

                     tv1.setVisibility(View.GONE);

                 }

             }

         });

     }

     /**

      * dip转px

      * @param context

      * @param dipValue

      * @return

      */

     public static int dip2px(Context context, float dipValue) {

         final float scale = context.getResources().getDisplayMetrics().density;

         return (int) (dipValue * scale + 0.5f);

     }

     /**

      * 获取系统状态栏高度

      * @param context

      * @return

      */

     public int getStatusBarHeight(Context context) {

         Class<?> c = null;

         Object obj = null;

         Field field = null;

         int x = 0, statusBarHeight = 0;

         try {

             c = Class.forName("com.android.internal.R$dimen");

             obj = c.newInstance();

             field = c.getField("status_bar_height");

             x = Integer.parseInt(field.get(obj).toString());

             statusBarHeight = context.getResources().getDimensionPixelSize(x);

             Log.v("@@@@@@", "the status bar height is : " + statusBarHeight);

         } catch (Exception e1) {

             e1.printStackTrace();

         }

         return statusBarHeight;

     }

 }

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

     xmlns:tools="http://schemas.android.com/tools"

     android:id="@+id/rlMain"

     android:layout_width="match_parent"

     android:layout_height="match_parent" >

     <TextView

         android:id="@+id/tv1"

         android:layout_width="match_parent"

         android:layout_height="70dp"

         android:layout_alignParentBottom="true"

         android:background="@android:color/holo_red_dark"

         android:gravity="center"

         android:text="@string/hello_world"

         android:textColor="@android:color/white" />

     <Button

         android:id="@+id/button1"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:layout_alignParentLeft="true"

         android:layout_alignParentTop="true"

         android:layout_marginLeft="44dp"

         android:text="Button" />

     <TextView

         android:id="@+id/textView1"

         android:layout_width="match_parent"

         android:layout_height="wrap_content"

         android:layout_alignLeft="@+id/button1"

         android:layout_below="@+id/button1"

         android:maxLines="10"

         android:scrollbars="vertical"

         android:text="TextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextViewTextView" />

 </RelativeLayout>