Android手势滑动Tab

public class MainActivity 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;
private TabWidget tabWidget;
int currentView = 0;
private static int maxTabIndex = 2; @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main); TabHost tabHost = getTabHost();
tabHost.addTab(tabHost.newTabSpec("tab11").setIndicator("AAA ").setContent(new Intent(this, A.class)));
tabHost.addTab(tabHost.newTabSpec("tab12").setIndicator("BBB ").setContent(new Intent(this, B.class)));
tabHost.addTab(tabHost.newTabSpec("tab13").setIndicator("CCC ").setContent(new Intent(this, C.class)));
tabHost.setCurrentTab(0); slideLeftIn = AnimationUtils.loadAnimation(this, R.anim.slide_left_in);
slideLeftOut = AnimationUtils.loadAnimation(this, R.anim.slide_left_out);
slideRightIn = AnimationUtils.loadAnimation(this, R.anim.slide_right_in);
slideRightOut = AnimationUtils.loadAnimation(this,R.anim.slide_right_out); gestureDetector = new GestureDetector(new MyGestureDetector());
gestureListener = new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}
};
tabWidget = tabHost.getTabWidget();
// 注意这个就是改变Tabhost默认样式的地方，一定将这部分代码放在上面这段代码的下面，不然样式改变不了
for (int i = 0; i < tabWidget.getChildCount(); i++) {
tabWidget.getChildAt(i).getLayoutParams().height = 70;// 设置选项卡的高度
tabWidget.getChildAt(i).getLayoutParams().width = 40;// 设置选项卡的宽度
TextView tv = (TextView) tabWidget.getChildAt(i).findViewById(android.R.id.title);
tv.setTextSize(15);
tv.setTextColor(this.getResources().getColorStateList(android.R.color.tertiary_text_dark));
}
} 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) {
}
return false;
}
} @Override
public boolean dispatchTouchEvent(MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
event.setAction(MotionEvent.ACTION_CANCEL);
}
return super.dispatchTouchEvent(event);
}
}

<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="1dip"
android:layout_weight="1" />
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="1dip"
android:paddingRight="1dip"
android:paddingTop="4dip" />
</LinearLayout>
</TabHost>

<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate android:toXDelta="0"
android:duration="800"
android:fromXDelta="100%p" />
</set>

<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="800"
android:fromXDelta="0"
android:toXDelta="-100%p" />
</set>

<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="800"
android:fromXDelta="-100%p"
android:toXDelta="0" />
</set>

<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:fromXDelta="0"
android:toXDelta="100%p" android:duration="800"/>
</set>