Java tutorial
/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android.support.v7.app; import android.app.Activity; import android.content.Context; import android.graphics.drawable.Drawable; import android.support.v4.app.FragmentTransaction; import android.util.Log; import android.view.View; import android.widget.SpinnerAdapter; import java.lang.ref.WeakReference; import java.util.ArrayList; class ActionBarImplICS extends ActionBar { final Activity mActivity; final Callback mCallback; final android.app.ActionBar mActionBar; private ArrayList<WeakReference<OnMenuVisibilityListenerWrapper>> mAddedMenuVisWrappers = new ArrayList<WeakReference<OnMenuVisibilityListenerWrapper>>(); public ActionBarImplICS(Activity activity, Callback callback) { mActivity = activity; mCallback = callback; mActionBar = activity.getActionBar(); } private OnMenuVisibilityListenerWrapper findAndRemoveMenuVisWrapper(OnMenuVisibilityListener compatListener) { for (int i = 0; i < mAddedMenuVisWrappers.size(); i++) { OnMenuVisibilityListenerWrapper wrapper = mAddedMenuVisWrappers.get(i).get(); if (wrapper == null) { mAddedMenuVisWrappers.remove(i--); } else if (wrapper.mWrappedListener == compatListener) { mAddedMenuVisWrappers.remove(i); return wrapper; } } return null; } @Override public void setCustomView(View view) { mActionBar.setCustomView(view); } @Override public void setCustomView(View view, LayoutParams layoutParams) { android.app.ActionBar.LayoutParams lp = new android.app.ActionBar.LayoutParams(layoutParams); lp.gravity = layoutParams.gravity; mActionBar.setCustomView(view, lp); } @Override public void setCustomView(int resId) { mActionBar.setCustomView(resId); } @Override public void setIcon(int resId) { mActionBar.setIcon(resId); } @Override public void setIcon(Drawable icon) { mActionBar.setIcon(icon); } @Override public void setLogo(int resId) { mActionBar.setLogo(resId); } @Override public void setLogo(Drawable logo) { mActionBar.setLogo(logo); } @Override public void setListNavigationCallbacks(SpinnerAdapter adapter, OnNavigationListener callback) { mActionBar.setListNavigationCallbacks(adapter, callback != null ? new OnNavigationListenerWrapper(callback) : null); } @Override public void setSelectedNavigationItem(int position) { mActionBar.setSelectedNavigationItem(position); } @Override public int getSelectedNavigationIndex() { return mActionBar.getSelectedNavigationIndex(); } @Override public int getNavigationItemCount() { return mActionBar.getNavigationItemCount(); } @Override public void setTitle(CharSequence title) { mActionBar.setTitle(title); } @Override public void setTitle(int resId) { mActionBar.setTitle(resId); } @Override public void setSubtitle(CharSequence subtitle) { mActionBar.setSubtitle(subtitle); } @Override public void setSubtitle(int resId) { mActionBar.setSubtitle(resId); } @Override public void setDisplayOptions(int options) { mActionBar.setDisplayOptions(options); } @Override public void setDisplayOptions(int options, int mask) { mActionBar.setDisplayOptions(options, mask); } @Override public void setDisplayUseLogoEnabled(boolean useLogo) { mActionBar.setDisplayUseLogoEnabled(useLogo); } @Override public void setDisplayShowHomeEnabled(boolean showHome) { mActionBar.setDisplayShowHomeEnabled(showHome); } @Override public void setDisplayHomeAsUpEnabled(boolean showHomeAsUp) { mActionBar.setDisplayHomeAsUpEnabled(showHomeAsUp); } @Override public void setDisplayShowTitleEnabled(boolean showTitle) { mActionBar.setDisplayShowTitleEnabled(showTitle); } @Override public void setDisplayShowCustomEnabled(boolean showCustom) { mActionBar.setDisplayShowCustomEnabled(showCustom); } @Override public void setBackgroundDrawable(Drawable d) { mActionBar.setBackgroundDrawable(d); } @Override public View getCustomView() { return mActionBar.getCustomView(); } @Override public CharSequence getTitle() { return mActionBar.getTitle(); } @Override public CharSequence getSubtitle() { return mActionBar.getSubtitle(); } @Override public int getNavigationMode() { return mActionBar.getNavigationMode(); } @Override public void setNavigationMode(int mode) { mActionBar.setNavigationMode(mode); } @Override public int getDisplayOptions() { return mActionBar.getDisplayOptions(); } @Override public Tab newTab() { final android.app.ActionBar.Tab realTab = mActionBar.newTab(); final TabWrapper result = new TabWrapper(realTab); realTab.setTag(result); return result; } @Override public void addTab(Tab tab) { mActionBar.addTab(((TabWrapper) tab).mWrappedTab); } @Override public void addTab(Tab tab, boolean setSelected) { mActionBar.addTab(((TabWrapper) tab).mWrappedTab, setSelected); } @Override public void addTab(Tab tab, int position) { mActionBar.addTab(((TabWrapper) tab).mWrappedTab, position); } @Override public void addTab(Tab tab, int position, boolean setSelected) { mActionBar.addTab(((TabWrapper) tab).mWrappedTab, position, setSelected); } @Override public void removeTab(Tab tab) { mActionBar.removeTab(((TabWrapper) tab).mWrappedTab); } @Override public void removeTabAt(int position) { mActionBar.removeTabAt(position); } @Override public void removeAllTabs() { mActionBar.removeAllTabs(); } @Override public void selectTab(Tab tab) { mActionBar.selectTab(((TabWrapper) tab).mWrappedTab); } @Override public Tab getSelectedTab() { return (Tab) mActionBar.getSelectedTab().getTag(); } @Override public Tab getTabAt(int index) { return (Tab) mActionBar.getTabAt(index).getTag(); } @Override public int getTabCount() { return mActionBar.getTabCount(); } @Override public Context getThemedContext() { return mActionBar.getThemedContext(); } @Override public int getHeight() { return mActionBar.getHeight(); } @Override public void show() { mActionBar.show(); } @Override public void hide() { mActionBar.hide(); } @Override public boolean isShowing() { return mActionBar.isShowing(); } @Override public void addOnMenuVisibilityListener(OnMenuVisibilityListener listener) { if (listener != null) { OnMenuVisibilityListenerWrapper w = new OnMenuVisibilityListenerWrapper(listener); mAddedMenuVisWrappers.add(new WeakReference<OnMenuVisibilityListenerWrapper>(w)); mActionBar.addOnMenuVisibilityListener(w); } } @Override public void removeOnMenuVisibilityListener(OnMenuVisibilityListener listener) { OnMenuVisibilityListenerWrapper l = findAndRemoveMenuVisWrapper(listener); mActionBar.removeOnMenuVisibilityListener(l); } static class OnNavigationListenerWrapper implements android.app.ActionBar.OnNavigationListener { private final OnNavigationListener mWrappedListener; public OnNavigationListenerWrapper(OnNavigationListener l) { mWrappedListener = l; } @Override public boolean onNavigationItemSelected(int itemPosition, long itemId) { return mWrappedListener.onNavigationItemSelected(itemPosition, itemId); } } static class OnMenuVisibilityListenerWrapper implements android.app.ActionBar.OnMenuVisibilityListener { final OnMenuVisibilityListener mWrappedListener; public OnMenuVisibilityListenerWrapper(OnMenuVisibilityListener l) { mWrappedListener = l; } @Override public void onMenuVisibilityChanged(boolean isVisible) { mWrappedListener.onMenuVisibilityChanged(isVisible); } } class TabWrapper extends ActionBar.Tab implements android.app.ActionBar.TabListener { final android.app.ActionBar.Tab mWrappedTab; private Object mTag; private FragmentTransaction mActiveTransaction; private CharSequence mContentDescription; private TabListener mTabListener; public TabWrapper(android.app.ActionBar.Tab tab) { mWrappedTab = tab; } @Override public int getPosition() { return mWrappedTab.getPosition(); } @Override public Drawable getIcon() { return mWrappedTab.getIcon(); } @Override public CharSequence getText() { return mWrappedTab.getText(); } @Override public Tab setIcon(Drawable icon) { mWrappedTab.setIcon(icon); return this; } @Override public Tab setIcon(int resId) { mWrappedTab.setIcon(resId); return this; } @Override public Tab setText(CharSequence text) { mWrappedTab.setText(text); return this; } @Override public Tab setText(int resId) { mWrappedTab.setText(resId); return this; } @Override public Tab setCustomView(View view) { mWrappedTab.setCustomView(view); return this; } @Override public Tab setCustomView(int layoutResId) { mWrappedTab.setCustomView(layoutResId); return this; } @Override public View getCustomView() { return mWrappedTab.getCustomView(); } @Override public Tab setTag(Object obj) { mTag = obj; return this; } @Override public Object getTag() { return mTag; } @Override public Tab setTabListener(TabListener listener) { mTabListener = listener; mWrappedTab.setTabListener(listener != null ? this : null); return this; } @Override public void select() { mWrappedTab.select(); } @Override public Tab setContentDescription(int resId) { mContentDescription = mActivity.getText(resId); return this; } @Override public Tab setContentDescription(CharSequence contentDesc) { mContentDescription = contentDesc; return this; } @Override public CharSequence getContentDescription() { return mContentDescription; } @Override public void onTabSelected(android.app.ActionBar.Tab tab, android.app.FragmentTransaction ft) { mTabListener.onTabSelected(this, ft != null ? getActiveTransaction() : null); commitActiveTransaction(); } @Override public void onTabUnselected(android.app.ActionBar.Tab tab, android.app.FragmentTransaction ft) { mTabListener.onTabUnselected(this, ft != null ? getActiveTransaction() : null); commitActiveTransaction(); } @Override public void onTabReselected(android.app.ActionBar.Tab tab, android.app.FragmentTransaction ft) { mTabListener.onTabReselected(this, ft != null ? getActiveTransaction() : null); commitActiveTransaction(); } private FragmentTransaction getActiveTransaction() { if (mActiveTransaction == null) { mActiveTransaction = mCallback.getSupportFragmentManager().beginTransaction() .disallowAddToBackStack(); } return mActiveTransaction; } private void commitActiveTransaction() { if (mActiveTransaction != null && !mActiveTransaction.isEmpty()) { mActiveTransaction.commit(); } mActiveTransaction = null; } } }