手势控制tabhost的activity切换

package com.wind.gesturetabhost; import android.app.Activity; import android.app.TabActivity; import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.view.GestureDetector; import android.view.GestureDetector.SimpleOnGestureListener; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.widget.TabHost; import android.widget.ViewFlipper; public class WindGestureTabHostActivity extends TabActivity { private static final int SWIPE_MIN_DISTANCE = 120; private static final int SWIPE_MAX_OFF_PATH = 250; private static final int SWIPE_THRESHOLD_VELOCITY = 200; private GestureDetector gestureDetector; View.OnTouchListener gestureListener; /*private Animation slideLeftIn; private Animation slideLeftOut; private Animation slideRightIn; private Animation slideRightOut; private ViewFlipper viewFlipper; */ int currentView = 0; private static int maxTabIndex = 2; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TabHost tabHost = getTabHost(); tabHost.addTab(tabHost.newTabSpec("tab1").setIndicator("sun ",getResources().getDrawable(android.R.drawable.btn_star)) .setContent(new Intent(this, Activity1.class))); overridePendingTransition(R.anim.slide_left_in,R.anim.slide_right_out); tabHost.addTab(tabHost.newTabSpec("tab2").setIndicator("wind ",getResources().getDrawable(android.R.drawable.btn_star)) .setContent(new Intent(this, Activity2.class))); overridePendingTransition(R.anim.slide_left_in,R.anim.slide_right_out); tabHost.addTab(tabHost.newTabSpec("tab3").setIndicator("snow ",getResources().getDrawable(android.R.drawable.btn_star)) .setContent(new Intent(this, Activity3.class))); overridePendingTransition(R.anim.slide_left_in,R.anim.slide_right_out); tabHost.setCurrentTab(0); /*slideLeftIn = AnimationUtils.loadAnimation(this,android.R.anim.slide_in_left ); slideLeftOut = AnimationUtils .loadAnimation(this, android.R.anim.slide_in_left); slideRightIn = AnimationUtils .loadAnimation(this, android.R.anim.slide_out_right); slideRightOut = AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right); */ gestureDetector = new GestureDetector(new MyGestureDetector()); gestureListener = new View.OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { if (gestureDetector.onTouchEvent(event)) { return true; } return false; } }; } /*private TabHost getTabHost() { // TODO Auto-generated method stub return null; }*/ class MyGestureDetector extends SimpleOnGestureListener { //@Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { TabHost tabHost = getTabHost(); try { if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) return false; // right to left swipe if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { Log.i("test ", "right"); if (currentView == maxTabIndex) { currentView = 0; } else { currentView++; } tabHost.setCurrentTab(currentView); } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { Log.i("test ", "left"); if (currentView == 0) { currentView = maxTabIndex; } else { currentView--; } tabHost.setCurrentTab(currentView); } } catch (Exception e) { // nothing } return false; } } // @Override // public boolean onTouchEvent(MotionEvent event) { // if (gestureDetector.onTouchEvent(event)) // return true; // else // return false; // } @Override public boolean dispatchTouchEvent(MotionEvent event) { if(gestureDetector.onTouchEvent(event)){ event.setAction(MotionEvent.ACTION_CANCEL); } return super.dispatchTouchEvent(event); } }