我正在开发购物应用程序，一切准备就绪，在主活动扩展 ActionBarActivity.on 这个活动 leftDrawermenu，Fragment 的 tabhost。当抽屉打开时，onBackPress 运行并执行 exitConfirmDialog 但如果抽屉关闭，则 exitConfirmdialog 不显示并直接关闭
public class MainActivity extends ActionBarActivity implements
OnTabChangeListener,OnTouchListener, OnBackStackChangedListener {
/** The Sliding list view. */
private ListView mSlidingListView;
/** The Main adapter data. */
private ArrayList<Category> mMainAdapterData;
/** The Sliding adapter. */
private SlidingAdapter mSlidingAdapter;
/** The catalog xml parser. */
private CatalogXmlParser catalogXmlParser;
/** The Drawer toggle. */
private ActionBarDrawerToggle mDrawerToggle;
/** The Drawer layout. */
private DrawerLayout mDrawerLayout;
/** The Toolbar. */
private Toolbar mToolbar;
/** The Ab cart counter. */
public static TextView mAbCartCounter;
/** The Ab title. */
private TextView mAbTitle;
/** The Ab search. */
/** The Ab checkout. */
private View mAbCheckout;
/** The Ab cart image view. */
public static View mAbCartImageView;
/** The Ab login cart image view. (added by nayan)*/
//private View mAbLoginImageView;
public View mAbLoginImageView;
private int ExitFlag=1;
/** The Ab clear filter. */
//private View mAbClearFilter;
/** The Ab search et. */
private EditText mAbSearchEt;
/** The Ab cancel search. */
private View mAbCancelSearch;
/** The Search text watcher. */
private SearchTextWatcher mSearchTextWatcher;
/** The Ab sent. */
private View mAbSent;
private Context mContext;
@SuppressWarnings("deprecation")
private LocalActivityManager mLocalActivityManager;
private Bundle savedInstanceState_;
public List<List<Product>> AdapterData;
public boolean IsHaveSlider;
public TabHost tabHost;
private TextView tabtext;
private HorizontalScrollView scroll_Focus;
public static Set<String> Cart_ProductList = new HashSet<String>();
public boolean first_Time=true;
private int tab;
private View login_lbl;
private RelativeLayout layout_Cart;
private Toast toast;
private ImageView mAbSearch;
private View mAbClearFilter;
public String Current_Fragment_flag;
public static LinearLayout container;
public static EditText sampleImage;
private int AnimationState=0;
/*
* (non-Javadoc)
*
* @see android.support.v7.app.ActionBarActivity#onCreate(android.os.Bundle)
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
this.mContext = getBaseContext();
ThemesManager.setCorrectTheme(this, AppSettings.CURRENT_THEME);
super.onCreate(savedInstanceState);
savedInstanceState_=savedInstanceState;
MainSplashScreen.isfirsttime=false;
setContentView(R.layout.activity_main);
mSearchTextWatcher = new SearchTextWatcher();
ImageLoaderConfiguration imageLoaderConfiguration = ImageOptionsBuilder
.createImageLoaderConfiguration(this);
ImageLoader.getInstance().init(imageLoaderConfiguration);
catalogXmlParser = CatalogXmlParser.getInstance();
catalogXmlParser.parseData(this);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
sampleImage = (EditText) findViewById(R.id.sampleEDT);
container = (LinearLayout) findViewById(R.id.main_placeholder);
initActionbar();
//ADDED BY NAYAN FOR INVISIBLE LOGIN BUTTON FROM ACTIONBAR IF ALREADY LOGGED
mAbLoginImageView = findViewById(R.id.ab_login_card);
login_lbl=findViewById(R.id.login_lbl);
sampleImage.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
if(AnimationState==0)
{
mAbCartCounter.animate().rotationYBy(720).setDuration(2000);
}
mAbCartCounter.animate().setListener(new AnimatorListener() {
@Override
public void onAnimationStart(Animator arg0) {
// TODO Auto-generated method stub
AnimationState=1;
}
@Override
public void onAnimationRepeat(Animator arg0) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationEnd(Animator arg0) {
// TODO Auto-generated method stub
AnimationState=0;
}
@Override
public void onAnimationCancel(Animator arg0) {
// TODO Auto-generated method stub
}
});
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
boolean isLogges = ApplicationPreference.getLogInStatus();
if (isLogges!=true)
{
mAbLoginImageView.setVisibility(View.VISIBLE);
login_lbl.setVisibility(View.VISIBLE);
mAbCartImageView.setVisibility(View.GONE);
mAbCartCounter.setVisibility(View.GONE);
}
else
{
mAbLoginImageView.setVisibility(View.INVISIBLE);
login_lbl.setVisibility(View.INVISIBLE);
mAbCartImageView.setVisibility(View.VISIBLE);
mAbCartCounter.setVisibility(View.VISIBLE);
}
//END NAYAN
tabhost();
mAbCartImageView.setClickable(true);
mAbCartCounter.setClickable(true);
layout_Cart=(RelativeLayout)findViewById(R.id.layout_Cart);
layout_Cart.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int is_cart_visible=mAbCartImageView.getVisibility();
if(is_cart_visible==0)
{
// showCartFragment(true, false);
/* PopupWindow m_PopUpWindow = new PopupWindow(MainActivity.this);
m_PopUpWindow.setContentView(v);
m_PopUpWindow.setHeight(50);
m_PopUpWindow.setWidth(50);
m_PopUpWindow.showAsDropDown(v,300,5);*/
// mAbCartImageView.setClickable(false);
// mAbCartCounter.setClickable(false);
boolean isLogges = ApplicationPreference.getLogInStatus();
if(isLogges==false)
{
Toast.makeText(mContext,
mContext.getString(R.string.pls_login),
Toast.LENGTH_LONG).show();
}else
{
if(Integer.parseInt(mAbCartCounter.getText().toString())>0)
{
// mAbCartImageView.setBackgroundColor(Color.GREEN);
//mAbCartCounter.setError("Please Wait....");
// boolean addToBackStack=false;
// boolean clearBackStack=false;
// FragmentDirectOrder FragmentDirectOrder1 = new FragmentDirectOrder("").newInstance();
// //fragmentLogin.TAG="Login";
// showScreen(FragmentDirectOrder1, FragmentDirectOrder1.TAG, addToBackStack,clearBackStack);
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setMessage("please Wait...");
AlertDialog dialog = builder.show();
// Must call show() prior to fetching text view
TextView messageView = (TextView)dialog.findViewById(android.R.id.message);
messageView.setGravity(Gravity.CENTER);
Intent orderBooking = new Intent(MainActivity.this, OrderBookingScreen.class);
orderBooking.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
orderBooking.putExtra("CALLING", "cart");
startActivity(orderBooking);
}
else
{
Toast toast= Toast.makeText(getApplicationContext(),"Please select the product.",Toast.LENGTH_LONG);
LinearLayout linearlayout=(LinearLayout)toast.getView();
TextView msgtext=(TextView)linearlayout.getChildAt(0);
msgtext.setTextSize(12);
toast.setGravity(Gravity.TOP|Gravity.CENTER_HORIZONTAL,70,3);
// toast.setMargin(10, 10);
toast.show();
}
/* for(int i=0;i<tabHost.getTabWidget().getChildCount();i++)
{
TextView tabtext_2=(TextView) tabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title);
tabtext_2.setTextColor(Color.BLACK);
tabHost.getTabWidget().getChildAt(i).setBackgroundColor(Color.TRANSPARENT);
tabHost.clearFocus();
}*/
}
}else
{
Intent login_form = new Intent(MainActivity.this, FragmentLogin.class);
startActivity(login_form);
}
}
});
// overridePendingTransition(R.anim.fade_in, R.anim.fade_out);
}
在后按片段
public void onBackPressed() {
if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
mDrawerLayout.closeDrawer(GravityCompat.START);
Toast.makeText(this, "DrawerClosed", Toast.LENGTH_LONG).show();
} else if (getSupportFragmentManager().getBackStackEntryCount() > 0) {
getSupportFragmentManager().popBackStack();
Toast.makeText(this, "popBackStack", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "popBackStack", Toast.LENGTH_LONG).show();
super.onBackPressed();
}
}