The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.widget; |
| 18 | |
Gilles Debunne | ce2baf0 | 2010-02-10 15:19:14 -0800 | [diff] [blame] | 19 | import com.android.internal.R; |
| 20 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 21 | import android.app.LocalActivityManager; |
| 22 | import android.content.Context; |
| 23 | import android.content.Intent; |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 24 | import android.content.res.TypedArray; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 25 | import android.graphics.drawable.Drawable; |
Mike Cleron | 7609764 | 2009-09-25 17:53:56 -0700 | [diff] [blame] | 26 | import android.os.Build; |
Jeff Sharkey | 11f4a48 | 2011-08-08 21:05:40 -0700 | [diff] [blame] | 27 | import android.text.TextUtils; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 28 | import android.util.AttributeSet; |
| 29 | import android.view.KeyEvent; |
| 30 | import android.view.LayoutInflater; |
| 31 | import android.view.SoundEffectConstants; |
| 32 | import android.view.View; |
| 33 | import android.view.ViewGroup; |
| 34 | import android.view.ViewTreeObserver; |
| 35 | import android.view.Window; |
Svetoslav Ganov | 8a78fd4 | 2012-01-17 14:36:46 -0800 | [diff] [blame] | 36 | import android.view.accessibility.AccessibilityEvent; |
| 37 | import android.view.accessibility.AccessibilityNodeInfo; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 38 | |
| 39 | import java.util.ArrayList; |
| 40 | import java.util.List; |
| 41 | |
| 42 | /** |
| 43 | * Container for a tabbed window view. This object holds two children: a set of tab labels that the |
| 44 | * user clicks to select a specific tab, and a FrameLayout object that displays the contents of that |
| 45 | * page. The individual elements are typically controlled using this container object, rather than |
| 46 | * setting values on the child elements themselves. |
Scott Main | 41ec653 | 2010-08-19 16:57:07 -0700 | [diff] [blame] | 47 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 48 | */ |
| 49 | public class TabHost extends FrameLayout implements ViewTreeObserver.OnTouchModeChangeListener { |
| 50 | |
Roger Olsson | 54ed87c | 2011-01-24 11:19:11 +0100 | [diff] [blame] | 51 | private static final int TABWIDGET_LOCATION_LEFT = 0; |
| 52 | private static final int TABWIDGET_LOCATION_TOP = 1; |
| 53 | private static final int TABWIDGET_LOCATION_RIGHT = 2; |
| 54 | private static final int TABWIDGET_LOCATION_BOTTOM = 3; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 55 | private TabWidget mTabWidget; |
| 56 | private FrameLayout mTabContent; |
| 57 | private List<TabSpec> mTabSpecs = new ArrayList<TabSpec>(2); |
| 58 | /** |
| 59 | * This field should be made private, so it is hidden from the SDK. |
| 60 | * {@hide} |
| 61 | */ |
| 62 | protected int mCurrentTab = -1; |
| 63 | private View mCurrentView = null; |
| 64 | /** |
| 65 | * This field should be made private, so it is hidden from the SDK. |
| 66 | * {@hide} |
| 67 | */ |
| 68 | protected LocalActivityManager mLocalActivityManager = null; |
| 69 | private OnTabChangeListener mOnTabChangeListener; |
| 70 | private OnKeyListener mTabKeyListener; |
| 71 | |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 72 | private int mTabLayoutId; |
| 73 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 74 | public TabHost(Context context) { |
| 75 | super(context); |
| 76 | initTabHost(); |
| 77 | } |
| 78 | |
| 79 | public TabHost(Context context, AttributeSet attrs) { |
| 80 | super(context, attrs); |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 81 | |
| 82 | TypedArray a = context.obtainStyledAttributes(attrs, |
| 83 | com.android.internal.R.styleable.TabWidget, |
| 84 | com.android.internal.R.attr.tabWidgetStyle, 0); |
| 85 | |
| 86 | mTabLayoutId = a.getResourceId(R.styleable.TabWidget_tabLayout, 0); |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 87 | a.recycle(); |
| 88 | |
Gilles Debunne | 0e23ab7 | 2010-12-14 19:26:37 -0800 | [diff] [blame] | 89 | if (mTabLayoutId == 0) { |
| 90 | // In case the tabWidgetStyle does not inherit from Widget.TabWidget and tabLayout is |
| 91 | // not defined. |
| 92 | mTabLayoutId = R.layout.tab_indicator_holo; |
| 93 | } |
| 94 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 95 | initTabHost(); |
| 96 | } |
| 97 | |
Romain Guy | 7237c56 | 2009-08-18 17:38:14 -0700 | [diff] [blame] | 98 | private void initTabHost() { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 99 | setFocusableInTouchMode(true); |
| 100 | setDescendantFocusability(FOCUS_AFTER_DESCENDANTS); |
| 101 | |
| 102 | mCurrentTab = -1; |
| 103 | mCurrentView = null; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Get a new {@link TabSpec} associated with this tab host. |
| 108 | * @param tag required tag of tab. |
| 109 | */ |
| 110 | public TabSpec newTabSpec(String tag) { |
| 111 | return new TabSpec(tag); |
| 112 | } |
| 113 | |
| 114 | |
| 115 | |
| 116 | /** |
Jack Veenstra | 982be3b | 2009-05-27 15:07:59 -0700 | [diff] [blame] | 117 | * <p>Call setup() before adding tabs if loading TabHost using findViewById(). |
| 118 | * <i><b>However</i></b>: You do not need to call setup() after getTabHost() |
| 119 | * in {@link android.app.TabActivity TabActivity}. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 120 | * Example:</p> |
| 121 | <pre>mTabHost = (TabHost)findViewById(R.id.tabhost); |
| 122 | mTabHost.setup(); |
| 123 | mTabHost.addTab(TAB_TAG_1, "Hello, world!", "Tab 1"); |
| 124 | */ |
| 125 | public void setup() { |
| 126 | mTabWidget = (TabWidget) findViewById(com.android.internal.R.id.tabs); |
| 127 | if (mTabWidget == null) { |
| 128 | throw new RuntimeException( |
| 129 | "Your TabHost must have a TabWidget whose id attribute is 'android.R.id.tabs'"); |
| 130 | } |
Evan Millar | 3730bb1 | 2009-08-21 13:58:41 -0700 | [diff] [blame] | 131 | |
| 132 | // KeyListener to attach to all tabs. Detects non-navigation keys |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 133 | // and relays them to the tab content. |
| 134 | mTabKeyListener = new OnKeyListener() { |
| 135 | public boolean onKey(View v, int keyCode, KeyEvent event) { |
| 136 | switch (keyCode) { |
| 137 | case KeyEvent.KEYCODE_DPAD_CENTER: |
| 138 | case KeyEvent.KEYCODE_DPAD_LEFT: |
| 139 | case KeyEvent.KEYCODE_DPAD_RIGHT: |
| 140 | case KeyEvent.KEYCODE_DPAD_UP: |
| 141 | case KeyEvent.KEYCODE_DPAD_DOWN: |
| 142 | case KeyEvent.KEYCODE_ENTER: |
| 143 | return false; |
Evan Millar | 3730bb1 | 2009-08-21 13:58:41 -0700 | [diff] [blame] | 144 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 145 | } |
| 146 | mTabContent.requestFocus(View.FOCUS_FORWARD); |
| 147 | return mTabContent.dispatchKeyEvent(event); |
| 148 | } |
Evan Millar | 3730bb1 | 2009-08-21 13:58:41 -0700 | [diff] [blame] | 149 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 150 | }; |
Evan Millar | 3730bb1 | 2009-08-21 13:58:41 -0700 | [diff] [blame] | 151 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 152 | mTabWidget.setTabSelectionListener(new TabWidget.OnTabSelectionChanged() { |
| 153 | public void onTabSelectionChanged(int tabIndex, boolean clicked) { |
| 154 | setCurrentTab(tabIndex); |
| 155 | if (clicked) { |
| 156 | mTabContent.requestFocus(View.FOCUS_FORWARD); |
| 157 | } |
| 158 | } |
| 159 | }); |
| 160 | |
| 161 | mTabContent = (FrameLayout) findViewById(com.android.internal.R.id.tabcontent); |
| 162 | if (mTabContent == null) { |
| 163 | throw new RuntimeException( |
Evan Millar | 3730bb1 | 2009-08-21 13:58:41 -0700 | [diff] [blame] | 164 | "Your TabHost must have a FrameLayout whose id attribute is " |
Romain Guy | 7237c56 | 2009-08-18 17:38:14 -0700 | [diff] [blame] | 165 | + "'android.R.id.tabcontent'"); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 166 | } |
| 167 | } |
| 168 | |
Svetoslav Ganov | 5ac413a | 2010-10-05 15:59:25 -0700 | [diff] [blame] | 169 | @Override |
| 170 | public void sendAccessibilityEvent(int eventType) { |
| 171 | /* avoid super class behavior - TabWidget sends the right events */ |
| 172 | } |
| 173 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 174 | /** |
| 175 | * If you are using {@link TabSpec#setContent(android.content.Intent)}, this |
| 176 | * must be called since the activityGroup is needed to launch the local activity. |
| 177 | * |
| 178 | * This is done for you if you extend {@link android.app.TabActivity}. |
| 179 | * @param activityGroup Used to launch activities for tab content. |
| 180 | */ |
| 181 | public void setup(LocalActivityManager activityGroup) { |
| 182 | setup(); |
| 183 | mLocalActivityManager = activityGroup; |
| 184 | } |
| 185 | |
| 186 | |
| 187 | @Override |
| 188 | protected void onAttachedToWindow() { |
| 189 | super.onAttachedToWindow(); |
| 190 | final ViewTreeObserver treeObserver = getViewTreeObserver(); |
Gilles Debunne | 0e7d652d | 2011-02-22 15:26:14 -0800 | [diff] [blame] | 191 | treeObserver.addOnTouchModeChangeListener(this); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | @Override |
| 195 | protected void onDetachedFromWindow() { |
| 196 | super.onDetachedFromWindow(); |
| 197 | final ViewTreeObserver treeObserver = getViewTreeObserver(); |
Gilles Debunne | 0e7d652d | 2011-02-22 15:26:14 -0800 | [diff] [blame] | 198 | treeObserver.removeOnTouchModeChangeListener(this); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | /** |
| 202 | * {@inheritDoc} |
| 203 | */ |
| 204 | public void onTouchModeChanged(boolean isInTouchMode) { |
| 205 | if (!isInTouchMode) { |
| 206 | // leaving touch mode.. if nothing has focus, let's give it to |
| 207 | // the indicator of the current tab |
Romain Guy | 7237c56 | 2009-08-18 17:38:14 -0700 | [diff] [blame] | 208 | if (mCurrentView != null && (!mCurrentView.hasFocus() || mCurrentView.isFocused())) { |
Jack Veenstra | 5317514 | 2009-06-01 21:27:01 -0700 | [diff] [blame] | 209 | mTabWidget.getChildTabViewAt(mCurrentTab).requestFocus(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 210 | } |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * Add a tab. |
| 216 | * @param tabSpec Specifies how to create the indicator and content. |
| 217 | */ |
| 218 | public void addTab(TabSpec tabSpec) { |
| 219 | |
| 220 | if (tabSpec.mIndicatorStrategy == null) { |
| 221 | throw new IllegalArgumentException("you must specify a way to create the tab indicator."); |
| 222 | } |
| 223 | |
| 224 | if (tabSpec.mContentStrategy == null) { |
| 225 | throw new IllegalArgumentException("you must specify a way to create the tab content"); |
| 226 | } |
| 227 | View tabIndicator = tabSpec.mIndicatorStrategy.createIndicatorView(); |
| 228 | tabIndicator.setOnKeyListener(mTabKeyListener); |
Jack Veenstra | 5317514 | 2009-06-01 21:27:01 -0700 | [diff] [blame] | 229 | |
| 230 | // If this is a custom view, then do not draw the bottom strips for |
| 231 | // the tab indicators. |
| 232 | if (tabSpec.mIndicatorStrategy instanceof ViewIndicatorStrategy) { |
Romain Guy | 61c9d4b | 2010-03-01 14:12:10 -0800 | [diff] [blame] | 233 | mTabWidget.setStripEnabled(false); |
Jack Veenstra | 5317514 | 2009-06-01 21:27:01 -0700 | [diff] [blame] | 234 | } |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 235 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 236 | mTabWidget.addView(tabIndicator); |
| 237 | mTabSpecs.add(tabSpec); |
| 238 | |
| 239 | if (mCurrentTab == -1) { |
| 240 | setCurrentTab(0); |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | |
| 245 | /** |
| 246 | * Removes all tabs from the tab widget associated with this tab host. |
| 247 | */ |
| 248 | public void clearAllTabs() { |
| 249 | mTabWidget.removeAllViews(); |
| 250 | initTabHost(); |
| 251 | mTabContent.removeAllViews(); |
| 252 | mTabSpecs.clear(); |
| 253 | requestLayout(); |
| 254 | invalidate(); |
| 255 | } |
| 256 | |
| 257 | public TabWidget getTabWidget() { |
| 258 | return mTabWidget; |
| 259 | } |
| 260 | |
| 261 | public int getCurrentTab() { |
| 262 | return mCurrentTab; |
| 263 | } |
| 264 | |
| 265 | public String getCurrentTabTag() { |
| 266 | if (mCurrentTab >= 0 && mCurrentTab < mTabSpecs.size()) { |
| 267 | return mTabSpecs.get(mCurrentTab).getTag(); |
| 268 | } |
| 269 | return null; |
| 270 | } |
| 271 | |
| 272 | public View getCurrentTabView() { |
| 273 | if (mCurrentTab >= 0 && mCurrentTab < mTabSpecs.size()) { |
Jack Veenstra | 5317514 | 2009-06-01 21:27:01 -0700 | [diff] [blame] | 274 | return mTabWidget.getChildTabViewAt(mCurrentTab); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 275 | } |
| 276 | return null; |
| 277 | } |
| 278 | |
| 279 | public View getCurrentView() { |
| 280 | return mCurrentView; |
| 281 | } |
| 282 | |
| 283 | public void setCurrentTabByTag(String tag) { |
| 284 | int i; |
| 285 | for (i = 0; i < mTabSpecs.size(); i++) { |
| 286 | if (mTabSpecs.get(i).getTag().equals(tag)) { |
| 287 | setCurrentTab(i); |
| 288 | break; |
| 289 | } |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | /** |
| 294 | * Get the FrameLayout which holds tab content |
| 295 | */ |
| 296 | public FrameLayout getTabContentView() { |
| 297 | return mTabContent; |
| 298 | } |
| 299 | |
Roger Olsson | 54ed87c | 2011-01-24 11:19:11 +0100 | [diff] [blame] | 300 | /** |
| 301 | * Get the location of the TabWidget. |
| 302 | * |
| 303 | * @return The TabWidget location. |
| 304 | */ |
| 305 | private int getTabWidgetLocation() { |
| 306 | int location = TABWIDGET_LOCATION_TOP; |
| 307 | |
| 308 | switch (mTabWidget.getOrientation()) { |
| 309 | case LinearLayout.VERTICAL: |
| 310 | location = (mTabContent.getLeft() < mTabWidget.getLeft()) ? TABWIDGET_LOCATION_RIGHT |
| 311 | : TABWIDGET_LOCATION_LEFT; |
| 312 | break; |
| 313 | case LinearLayout.HORIZONTAL: |
| 314 | default: |
| 315 | location = (mTabContent.getTop() < mTabWidget.getTop()) ? TABWIDGET_LOCATION_BOTTOM |
| 316 | : TABWIDGET_LOCATION_TOP; |
| 317 | break; |
| 318 | } |
| 319 | return location; |
| 320 | } |
| 321 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 322 | @Override |
| 323 | public boolean dispatchKeyEvent(KeyEvent event) { |
| 324 | final boolean handled = super.dispatchKeyEvent(event); |
| 325 | |
Roger Olsson | 54ed87c | 2011-01-24 11:19:11 +0100 | [diff] [blame] | 326 | // unhandled key events change focus to tab indicator for embedded |
| 327 | // activities when there is nothing that will take focus from default |
| 328 | // focus searching |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 329 | if (!handled |
| 330 | && (event.getAction() == KeyEvent.ACTION_DOWN) |
Bjorn Bringert | acdef59 | 2009-12-10 15:58:49 +0000 | [diff] [blame] | 331 | && (mCurrentView != null) |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 332 | && (mCurrentView.isRootNamespace()) |
Roger Olsson | 54ed87c | 2011-01-24 11:19:11 +0100 | [diff] [blame] | 333 | && (mCurrentView.hasFocus())) { |
| 334 | int keyCodeShouldChangeFocus = KeyEvent.KEYCODE_DPAD_UP; |
| 335 | int directionShouldChangeFocus = View.FOCUS_UP; |
| 336 | int soundEffect = SoundEffectConstants.NAVIGATION_UP; |
| 337 | |
| 338 | switch (getTabWidgetLocation()) { |
| 339 | case TABWIDGET_LOCATION_LEFT: |
| 340 | keyCodeShouldChangeFocus = KeyEvent.KEYCODE_DPAD_LEFT; |
| 341 | directionShouldChangeFocus = View.FOCUS_LEFT; |
| 342 | soundEffect = SoundEffectConstants.NAVIGATION_LEFT; |
| 343 | break; |
| 344 | case TABWIDGET_LOCATION_RIGHT: |
| 345 | keyCodeShouldChangeFocus = KeyEvent.KEYCODE_DPAD_RIGHT; |
| 346 | directionShouldChangeFocus = View.FOCUS_RIGHT; |
| 347 | soundEffect = SoundEffectConstants.NAVIGATION_RIGHT; |
| 348 | break; |
| 349 | case TABWIDGET_LOCATION_BOTTOM: |
| 350 | keyCodeShouldChangeFocus = KeyEvent.KEYCODE_DPAD_DOWN; |
| 351 | directionShouldChangeFocus = View.FOCUS_DOWN; |
| 352 | soundEffect = SoundEffectConstants.NAVIGATION_DOWN; |
| 353 | break; |
| 354 | case TABWIDGET_LOCATION_TOP: |
| 355 | default: |
| 356 | keyCodeShouldChangeFocus = KeyEvent.KEYCODE_DPAD_UP; |
| 357 | directionShouldChangeFocus = View.FOCUS_UP; |
| 358 | soundEffect = SoundEffectConstants.NAVIGATION_UP; |
| 359 | break; |
| 360 | } |
| 361 | if (event.getKeyCode() == keyCodeShouldChangeFocus |
| 362 | && mCurrentView.findFocus().focusSearch(directionShouldChangeFocus) == null) { |
| 363 | mTabWidget.getChildTabViewAt(mCurrentTab).requestFocus(); |
| 364 | playSoundEffect(soundEffect); |
| 365 | return true; |
| 366 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 367 | } |
Evan Millar | 3730bb1 | 2009-08-21 13:58:41 -0700 | [diff] [blame] | 368 | return handled; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | |
| 372 | @Override |
| 373 | public void dispatchWindowFocusChanged(boolean hasFocus) { |
Bjorn Bringert | acdef59 | 2009-12-10 15:58:49 +0000 | [diff] [blame] | 374 | if (mCurrentView != null){ |
| 375 | mCurrentView.dispatchWindowFocusChanged(hasFocus); |
| 376 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 377 | } |
| 378 | |
Svetoslav Ganov | 8a78fd4 | 2012-01-17 14:36:46 -0800 | [diff] [blame] | 379 | @Override |
| 380 | public void onInitializeAccessibilityEvent(AccessibilityEvent event) { |
| 381 | super.onInitializeAccessibilityEvent(event); |
| 382 | event.setClassName(TabHost.class.getName()); |
| 383 | } |
| 384 | |
| 385 | @Override |
| 386 | public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { |
| 387 | super.onInitializeAccessibilityNodeInfo(info); |
| 388 | info.setClassName(TabHost.class.getName()); |
| 389 | } |
| 390 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 391 | public void setCurrentTab(int index) { |
| 392 | if (index < 0 || index >= mTabSpecs.size()) { |
| 393 | return; |
| 394 | } |
| 395 | |
| 396 | if (index == mCurrentTab) { |
| 397 | return; |
| 398 | } |
| 399 | |
| 400 | // notify old tab content |
| 401 | if (mCurrentTab != -1) { |
| 402 | mTabSpecs.get(mCurrentTab).mContentStrategy.tabClosed(); |
| 403 | } |
| 404 | |
| 405 | mCurrentTab = index; |
| 406 | final TabHost.TabSpec spec = mTabSpecs.get(index); |
| 407 | |
| 408 | // Call the tab widget's focusCurrentTab(), instead of just |
| 409 | // selecting the tab. |
| 410 | mTabWidget.focusCurrentTab(mCurrentTab); |
Evan Millar | 3730bb1 | 2009-08-21 13:58:41 -0700 | [diff] [blame] | 411 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 412 | // tab content |
| 413 | mCurrentView = spec.mContentStrategy.getContentView(); |
| 414 | |
| 415 | if (mCurrentView.getParent() == null) { |
| 416 | mTabContent |
| 417 | .addView( |
| 418 | mCurrentView, |
| 419 | new ViewGroup.LayoutParams( |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 420 | ViewGroup.LayoutParams.MATCH_PARENT, |
| 421 | ViewGroup.LayoutParams.MATCH_PARENT)); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | if (!mTabWidget.hasFocus()) { |
| 425 | // if the tab widget didn't take focus (likely because we're in touch mode) |
| 426 | // give the current tab content view a shot |
| 427 | mCurrentView.requestFocus(); |
| 428 | } |
| 429 | |
| 430 | //mTabContent.requestFocus(View.FOCUS_FORWARD); |
| 431 | invokeOnTabChangeListener(); |
| 432 | } |
| 433 | |
| 434 | /** |
| 435 | * Register a callback to be invoked when the selected state of any of the items |
| 436 | * in this list changes |
| 437 | * @param l |
| 438 | * The callback that will run |
| 439 | */ |
| 440 | public void setOnTabChangedListener(OnTabChangeListener l) { |
| 441 | mOnTabChangeListener = l; |
| 442 | } |
| 443 | |
| 444 | private void invokeOnTabChangeListener() { |
| 445 | if (mOnTabChangeListener != null) { |
| 446 | mOnTabChangeListener.onTabChanged(getCurrentTabTag()); |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * Interface definition for a callback to be invoked when tab changed |
| 452 | */ |
| 453 | public interface OnTabChangeListener { |
| 454 | void onTabChanged(String tabId); |
| 455 | } |
| 456 | |
| 457 | |
| 458 | /** |
| 459 | * Makes the content of a tab when it is selected. Use this if your tab |
| 460 | * content needs to be created on demand, i.e. you are not showing an |
| 461 | * existing view or starting an activity. |
| 462 | */ |
| 463 | public interface TabContentFactory { |
| 464 | /** |
| 465 | * Callback to make the tab contents |
Evan Millar | 3730bb1 | 2009-08-21 13:58:41 -0700 | [diff] [blame] | 466 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 467 | * @param tag |
| 468 | * Which tab was selected. |
Jack Veenstra | 982be3b | 2009-05-27 15:07:59 -0700 | [diff] [blame] | 469 | * @return The view to display the contents of the selected tab. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 470 | */ |
| 471 | View createTabContent(String tag); |
| 472 | } |
| 473 | |
| 474 | |
| 475 | /** |
Jack Veenstra | 982be3b | 2009-05-27 15:07:59 -0700 | [diff] [blame] | 476 | * A tab has a tab indicator, content, and a tag that is used to keep |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 477 | * track of it. This builder helps choose among these options. |
| 478 | * |
| 479 | * For the tab indicator, your choices are: |
| 480 | * 1) set a label |
| 481 | * 2) set a label and an icon |
| 482 | * |
| 483 | * For the tab content, your choices are: |
| 484 | * 1) the id of a {@link View} |
| 485 | * 2) a {@link TabContentFactory} that creates the {@link View} content. |
| 486 | * 3) an {@link Intent} that launches an {@link android.app.Activity}. |
| 487 | */ |
| 488 | public class TabSpec { |
| 489 | |
| 490 | private String mTag; |
| 491 | |
| 492 | private IndicatorStrategy mIndicatorStrategy; |
| 493 | private ContentStrategy mContentStrategy; |
| 494 | |
| 495 | private TabSpec(String tag) { |
| 496 | mTag = tag; |
| 497 | } |
| 498 | |
| 499 | /** |
| 500 | * Specify a label as the tab indicator. |
| 501 | */ |
| 502 | public TabSpec setIndicator(CharSequence label) { |
| 503 | mIndicatorStrategy = new LabelIndicatorStrategy(label); |
| 504 | return this; |
| 505 | } |
| 506 | |
| 507 | /** |
| 508 | * Specify a label and icon as the tab indicator. |
| 509 | */ |
| 510 | public TabSpec setIndicator(CharSequence label, Drawable icon) { |
| 511 | mIndicatorStrategy = new LabelAndIconIndicatorStrategy(label, icon); |
| 512 | return this; |
| 513 | } |
| 514 | |
| 515 | /** |
Jack Veenstra | 5317514 | 2009-06-01 21:27:01 -0700 | [diff] [blame] | 516 | * Specify a view as the tab indicator. |
| 517 | */ |
| 518 | public TabSpec setIndicator(View view) { |
| 519 | mIndicatorStrategy = new ViewIndicatorStrategy(view); |
| 520 | return this; |
| 521 | } |
| 522 | |
| 523 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 524 | * Specify the id of the view that should be used as the content |
| 525 | * of the tab. |
| 526 | */ |
| 527 | public TabSpec setContent(int viewId) { |
| 528 | mContentStrategy = new ViewIdContentStrategy(viewId); |
| 529 | return this; |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * Specify a {@link android.widget.TabHost.TabContentFactory} to use to |
| 534 | * create the content of the tab. |
| 535 | */ |
| 536 | public TabSpec setContent(TabContentFactory contentFactory) { |
| 537 | mContentStrategy = new FactoryContentStrategy(mTag, contentFactory); |
| 538 | return this; |
| 539 | } |
| 540 | |
| 541 | /** |
| 542 | * Specify an intent to use to launch an activity as the tab content. |
| 543 | */ |
| 544 | public TabSpec setContent(Intent intent) { |
| 545 | mContentStrategy = new IntentContentStrategy(mTag, intent); |
| 546 | return this; |
| 547 | } |
| 548 | |
| 549 | |
Jack Veenstra | 5317514 | 2009-06-01 21:27:01 -0700 | [diff] [blame] | 550 | public String getTag() { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 551 | return mTag; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * Specifies what you do to create a tab indicator. |
| 557 | */ |
| 558 | private static interface IndicatorStrategy { |
| 559 | |
| 560 | /** |
| 561 | * Return the view for the indicator. |
| 562 | */ |
| 563 | View createIndicatorView(); |
| 564 | } |
| 565 | |
| 566 | /** |
| 567 | * Specifies what you do to manage the tab content. |
| 568 | */ |
| 569 | private static interface ContentStrategy { |
| 570 | |
| 571 | /** |
| 572 | * Return the content view. The view should may be cached locally. |
| 573 | */ |
| 574 | View getContentView(); |
| 575 | |
| 576 | /** |
| 577 | * Perhaps do something when the tab associated with this content has |
| 578 | * been closed (i.e make it invisible, or remove it). |
| 579 | */ |
| 580 | void tabClosed(); |
| 581 | } |
| 582 | |
| 583 | /** |
| 584 | * How to create a tab indicator that just has a label. |
| 585 | */ |
| 586 | private class LabelIndicatorStrategy implements IndicatorStrategy { |
| 587 | |
| 588 | private final CharSequence mLabel; |
| 589 | |
| 590 | private LabelIndicatorStrategy(CharSequence label) { |
| 591 | mLabel = label; |
| 592 | } |
| 593 | |
| 594 | public View createIndicatorView() { |
Mike Cleron | 7609764 | 2009-09-25 17:53:56 -0700 | [diff] [blame] | 595 | final Context context = getContext(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 596 | LayoutInflater inflater = |
Mike Cleron | 7609764 | 2009-09-25 17:53:56 -0700 | [diff] [blame] | 597 | (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 598 | View tabIndicator = inflater.inflate(mTabLayoutId, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 599 | mTabWidget, // tab widget is the parent |
| 600 | false); // no inflate params |
| 601 | |
| 602 | final TextView tv = (TextView) tabIndicator.findViewById(R.id.title); |
| 603 | tv.setText(mLabel); |
| 604 | |
Mike Cleron | 7609764 | 2009-09-25 17:53:56 -0700 | [diff] [blame] | 605 | if (context.getApplicationInfo().targetSdkVersion <= Build.VERSION_CODES.DONUT) { |
| 606 | // Donut apps get old color scheme |
| 607 | tabIndicator.setBackgroundResource(R.drawable.tab_indicator_v4); |
| 608 | tv.setTextColor(context.getResources().getColorStateList(R.color.tab_indicator_text_v4)); |
| 609 | } |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 610 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 611 | return tabIndicator; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | /** |
| 616 | * How we create a tab indicator that has a label and an icon |
| 617 | */ |
| 618 | private class LabelAndIconIndicatorStrategy implements IndicatorStrategy { |
| 619 | |
| 620 | private final CharSequence mLabel; |
| 621 | private final Drawable mIcon; |
| 622 | |
| 623 | private LabelAndIconIndicatorStrategy(CharSequence label, Drawable icon) { |
| 624 | mLabel = label; |
| 625 | mIcon = icon; |
| 626 | } |
| 627 | |
| 628 | public View createIndicatorView() { |
Mike Cleron | 7609764 | 2009-09-25 17:53:56 -0700 | [diff] [blame] | 629 | final Context context = getContext(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 630 | LayoutInflater inflater = |
Mike Cleron | 7609764 | 2009-09-25 17:53:56 -0700 | [diff] [blame] | 631 | (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 632 | View tabIndicator = inflater.inflate(mTabLayoutId, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 633 | mTabWidget, // tab widget is the parent |
| 634 | false); // no inflate params |
| 635 | |
| 636 | final TextView tv = (TextView) tabIndicator.findViewById(R.id.title); |
Jeff Sharkey | 11f4a48 | 2011-08-08 21:05:40 -0700 | [diff] [blame] | 637 | final ImageView iconView = (ImageView) tabIndicator.findViewById(R.id.icon); |
| 638 | |
| 639 | // when icon is gone by default, we're in exclusive mode |
| 640 | final boolean exclusive = iconView.getVisibility() == View.GONE; |
| 641 | final boolean bindIcon = !exclusive || TextUtils.isEmpty(mLabel); |
| 642 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 643 | tv.setText(mLabel); |
| 644 | |
Jeff Sharkey | 11f4a48 | 2011-08-08 21:05:40 -0700 | [diff] [blame] | 645 | if (bindIcon && mIcon != null) { |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 646 | iconView.setImageDrawable(mIcon); |
| 647 | iconView.setVisibility(VISIBLE); |
| 648 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 649 | |
Mike Cleron | 7609764 | 2009-09-25 17:53:56 -0700 | [diff] [blame] | 650 | if (context.getApplicationInfo().targetSdkVersion <= Build.VERSION_CODES.DONUT) { |
| 651 | // Donut apps get old color scheme |
| 652 | tabIndicator.setBackgroundResource(R.drawable.tab_indicator_v4); |
| 653 | tv.setTextColor(context.getResources().getColorStateList(R.color.tab_indicator_text_v4)); |
| 654 | } |
Gilles Debunne | 44c1473 | 2010-10-19 11:56:59 -0700 | [diff] [blame] | 655 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 656 | return tabIndicator; |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | /** |
Jack Veenstra | 5317514 | 2009-06-01 21:27:01 -0700 | [diff] [blame] | 661 | * How to create a tab indicator by specifying a view. |
| 662 | */ |
| 663 | private class ViewIndicatorStrategy implements IndicatorStrategy { |
| 664 | |
| 665 | private final View mView; |
| 666 | |
| 667 | private ViewIndicatorStrategy(View view) { |
| 668 | mView = view; |
| 669 | } |
| 670 | |
| 671 | public View createIndicatorView() { |
| 672 | return mView; |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 677 | * How to create the tab content via a view id. |
| 678 | */ |
| 679 | private class ViewIdContentStrategy implements ContentStrategy { |
| 680 | |
| 681 | private final View mView; |
| 682 | |
| 683 | private ViewIdContentStrategy(int viewId) { |
| 684 | mView = mTabContent.findViewById(viewId); |
| 685 | if (mView != null) { |
| 686 | mView.setVisibility(View.GONE); |
| 687 | } else { |
| 688 | throw new RuntimeException("Could not create tab content because " + |
| 689 | "could not find view with id " + viewId); |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | public View getContentView() { |
| 694 | mView.setVisibility(View.VISIBLE); |
| 695 | return mView; |
| 696 | } |
| 697 | |
| 698 | public void tabClosed() { |
| 699 | mView.setVisibility(View.GONE); |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | /** |
| 704 | * How tab content is managed using {@link TabContentFactory}. |
| 705 | */ |
| 706 | private class FactoryContentStrategy implements ContentStrategy { |
| 707 | private View mTabContent; |
| 708 | private final CharSequence mTag; |
| 709 | private TabContentFactory mFactory; |
| 710 | |
| 711 | public FactoryContentStrategy(CharSequence tag, TabContentFactory factory) { |
| 712 | mTag = tag; |
| 713 | mFactory = factory; |
| 714 | } |
| 715 | |
| 716 | public View getContentView() { |
| 717 | if (mTabContent == null) { |
| 718 | mTabContent = mFactory.createTabContent(mTag.toString()); |
| 719 | } |
| 720 | mTabContent.setVisibility(View.VISIBLE); |
| 721 | return mTabContent; |
| 722 | } |
| 723 | |
| 724 | public void tabClosed() { |
Gilles Debunne | ce2baf0 | 2010-02-10 15:19:14 -0800 | [diff] [blame] | 725 | mTabContent.setVisibility(View.GONE); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 726 | } |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * How tab content is managed via an {@link Intent}: the content view is the |
| 731 | * decorview of the launched activity. |
| 732 | */ |
| 733 | private class IntentContentStrategy implements ContentStrategy { |
| 734 | |
| 735 | private final String mTag; |
| 736 | private final Intent mIntent; |
| 737 | |
| 738 | private View mLaunchedView; |
| 739 | |
| 740 | private IntentContentStrategy(String tag, Intent intent) { |
| 741 | mTag = tag; |
| 742 | mIntent = intent; |
| 743 | } |
| 744 | |
| 745 | public View getContentView() { |
| 746 | if (mLocalActivityManager == null) { |
| 747 | throw new IllegalStateException("Did you forget to call 'public void setup(LocalActivityManager activityGroup)'?"); |
| 748 | } |
| 749 | final Window w = mLocalActivityManager.startActivity( |
| 750 | mTag, mIntent); |
| 751 | final View wd = w != null ? w.getDecorView() : null; |
| 752 | if (mLaunchedView != wd && mLaunchedView != null) { |
| 753 | if (mLaunchedView.getParent() != null) { |
| 754 | mTabContent.removeView(mLaunchedView); |
| 755 | } |
| 756 | } |
| 757 | mLaunchedView = wd; |
Evan Millar | 3730bb1 | 2009-08-21 13:58:41 -0700 | [diff] [blame] | 758 | |
Jack Veenstra | 982be3b | 2009-05-27 15:07:59 -0700 | [diff] [blame] | 759 | // XXX Set FOCUS_AFTER_DESCENDANTS on embedded activities for now so they can get |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 760 | // focus if none of their children have it. They need focus to be able to |
| 761 | // display menu items. |
| 762 | // |
| 763 | // Replace this with something better when Bug 628886 is fixed... |
| 764 | // |
| 765 | if (mLaunchedView != null) { |
| 766 | mLaunchedView.setVisibility(View.VISIBLE); |
| 767 | mLaunchedView.setFocusableInTouchMode(true); |
| 768 | ((ViewGroup) mLaunchedView).setDescendantFocusability( |
| 769 | FOCUS_AFTER_DESCENDANTS); |
| 770 | } |
| 771 | return mLaunchedView; |
| 772 | } |
| 773 | |
| 774 | public void tabClosed() { |
| 775 | if (mLaunchedView != null) { |
| 776 | mLaunchedView.setVisibility(View.GONE); |
| 777 | } |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | } |