編輯:關於android開發
《類似通訊錄分組的Android PinnedSectionListView,分組標簽懸停滑入滑出》
常用的聯系人、通訊錄,會按照聯系人的姓氏從A,B,C,,,X,Y,Z,這樣歸類排列下去,方便用戶快速查找和定位。PinnedSectionListView是一個第三方的開源框架,在github上的鏈接地址是:https://github.com/beworker/pinned-section-listview 。分組的標簽會懸停在ListView的頂部,直到該分組被滑出/滑入整個ListView的可視界面而呈現出彈入彈出效果。
將PinnedSectionListView類放入自己的項目中:
PinnedSectionListView類代碼:
1 package com.lixu.biaoqianxuanting; 2 /* 3 * Copyright (C) 2013 Sergej Shafarenka, halfbit.de 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file kt in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 import android.content.Context; 19 import android.database.DataSetObserver; 20 import android.graphics.Canvas; 21 import android.graphics.Color; 22 import android.graphics.PointF; 23 import android.graphics.Rect; 24 import android.graphics.drawable.GradientDrawable; 25 import android.graphics.drawable.GradientDrawable.Orientation; 26 import android.os.Parcelable; 27 import android.util.AttributeSet; 28 import android.view.MotionEvent; 29 import android.view.SoundEffectConstants; 30 import android.view.View; 31 import android.view.ViewConfiguration; 32 import android.view.accessibility.AccessibilityEvent; 33 import android.widget.AbsListView; 34 import android.widget.HeaderViewListAdapter; 35 import android.widget.ListAdapter; 36 import android.widget.ListView; 37 import android.widget.SectionIndexer; 38 39 40 /** 41 * ListView, which is capable to pin section views at its top while the rest is still scrolled. 42 */ 43 public class PinnedSectionListView extends ListView { 44 45 //-- inner classes 46 47 /** List adapter to be implemented for being used with PinnedSectionListView adapter. */ 48 public static interface PinnedSectionListAdapter extends ListAdapter { 49 /** This method shall return 'true' if views of given type has to be pinned. */ 50 boolean isItemViewTypePinned(int viewType); 51 } 52 53 /** Wrapper class for pinned section view and its position in the list. */ 54 static class PinnedSection { 55 public View view; 56 public int position; 57 public long id; 58 } 59 60 //-- class fields 61 62 // fields used for handling touch events 63 private final Rect mTouchRect = new Rect(); 64 private final PointF mTouchPoint = new PointF(); 65 private int mTouchSlop; 66 private View mTouchTarget; 67 private MotionEvent mDownEvent; 68 69 // fields used for drawing shadow under a pinned section 70 private GradientDrawable mShadowDrawable; 71 private int mSectionsDistanceY; 72 private int mShadowHeight; 73 74 /** Delegating listener, can be null. */ 75 OnScrollListener mDelegateOnScrollListener; 76 77 /** Shadow for being recycled, can be null. */ 78 PinnedSection mRecycleSection; 79 80 /** shadow instance with a pinned view, can be null. */ 81 PinnedSection mPinnedSection; 82 83 /** Pinned view Y-translation. We use it to stick pinned view to the next section. */ 84 int mTranslateY; 85 86 /** Scroll listener which does the magic */ 87 private final OnScrollListener mOnScrollListener = new OnScrollListener() { 88 89 @Override public void onScrollStateChanged(AbsListView view, int scrollState) { 90 if (mDelegateOnScrollListener != null) { // delegate 91 mDelegateOnScrollListener.onScrollStateChanged(view, scrollState); 92 } 93 } 94 95 @Override 96 public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { 97 98 if (mDelegateOnScrollListener != null) { // delegate 99 mDelegateOnScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount); 100 } 101 102 // get expected adapter or fail fast 103 ListAdapter adapter = getAdapter(); 104 if (adapter == null || visibleItemCount == 0) return; // nothing to do 105 106 final boolean isFirstVisibleItemSection = 107 isItemViewTypePinned(adapter, adapter.getItemViewType(firstVisibleItem)); 108 109 if (isFirstVisibleItemSection) { 110 View sectionView = getChildAt(0); 111 if (sectionView.getTop() == getPaddingTop()) { // view sticks to the top, no need for pinned shadow 112 destroyPinnedShadow(); 113 } else { // section doesn't stick to the top, make sure we have a pinned shadow 114 ensureShadowForPosition(firstVisibleItem, firstVisibleItem, visibleItemCount); 115 } 116 117 } else { // section is not at the first visible position 118 int sectionPosition = findCurrentSectionPosition(firstVisibleItem); 119 if (sectionPosition > -1) { // we have section position 120 ensureShadowForPosition(sectionPosition, firstVisibleItem, visibleItemCount); 121 } else { // there is no section for the first visible item, destroy shadow 122 destroyPinnedShadow(); 123 } 124 } 125 }; 126 127 }; 128 129 /** Default change observer. */ 130 private final DataSetObserver mDataSetObserver = new DataSetObserver() { 131 @Override public void onChanged() { 132 recreatePinnedShadow(); 133 }; 134 @Override public void onInvalidated() { 135 recreatePinnedShadow(); 136 } 137 }; 138 139 //-- constructors 140 141 public PinnedSectionListView(Context context, AttributeSet attrs) { 142 super(context, attrs); 143 initView(); 144 } 145 146 public PinnedSectionListView(Context context, AttributeSet attrs, int defStyle) { 147 super(context, attrs, defStyle); 148 initView(); 149 } 150 151 private void initView() { 152 setOnScrollListener(mOnScrollListener); 153 mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop(); 154 initShadow(true); 155 } 156 157 //-- public API methods 158 159 public void setShadowVisible(boolean visible) { 160 initShadow(visible); 161 if (mPinnedSection != null) { 162 View v = mPinnedSection.view; 163 invalidate(v.getLeft(), v.getTop(), v.getRight(), v.getBottom() + mShadowHeight); 164 } 165 } 166 167 //-- pinned section drawing methods 168 169 public void initShadow(boolean visible) { 170 if (visible) { 171 if (mShadowDrawable == null) { 172 mShadowDrawable = new GradientDrawable(Orientation.TOP_BOTTOM, 173 new int[] { Color.parseColor("#ffa0a0a0"), Color.parseColor("#50a0a0a0"), Color.parseColor("#00a0a0a0")}); 174 mShadowHeight = (int) (8 * getResources().getDisplayMetrics().density); 175 } 176 } else { 177 if (mShadowDrawable != null) { 178 mShadowDrawable = null; 179 mShadowHeight = 0; 180 } 181 } 182 } 183 184 /** Create shadow wrapper with a pinned view for a view at given position */ 185 void createPinnedShadow(int position) { 186 187 // try to recycle shadow 188 PinnedSection pinnedShadow = mRecycleSection; 189 mRecycleSection = null; 190 191 // create new shadow, if needed 192 if (pinnedShadow == null) pinnedShadow = new PinnedSection(); 193 // request new view using recycled view, if such 194 View pinnedView = getAdapter().getView(position, pinnedShadow.view, PinnedSectionListView.this); 195 196 // read layout parameters 197 LayoutParams layoutParams = (LayoutParams) pinnedView.getLayoutParams(); 198 if (layoutParams == null) { 199 layoutParams = (LayoutParams) generateDefaultLayoutParams(); 200 pinnedView.setLayoutParams(layoutParams); 201 } 202 203 int heightMode = MeasureSpec.getMode(layoutParams.height); 204 int heightSize = MeasureSpec.getSize(layoutParams.height); 205 206 if (heightMode == MeasureSpec.UNSPECIFIED) heightMode = MeasureSpec.EXACTLY; 207 208 int maxHeight = getHeight() - getListPaddingTop() - getListPaddingBottom(); 209 if (heightSize > maxHeight) heightSize = maxHeight; 210 211 // measure & layout 212 int ws = MeasureSpec.makeMeasureSpec(getWidth() - getListPaddingLeft() - getListPaddingRight(), MeasureSpec.EXACTLY); 213 int hs = MeasureSpec.makeMeasureSpec(heightSize, heightMode); 214 pinnedView.measure(ws, hs); 215 pinnedView.layout(0, 0, pinnedView.getMeasuredWidth(), pinnedView.getMeasuredHeight()); 216 mTranslateY = 0; 217 218 // initialize pinned shadow 219 pinnedShadow.view = pinnedView; 220 pinnedShadow.position = position; 221 pinnedShadow.id = getAdapter().getItemId(position); 222 223 // store pinned shadow 224 mPinnedSection = pinnedShadow; 225 } 226 227 /** Destroy shadow wrapper for currently pinned view */ 228 void destroyPinnedShadow() { 229 if (mPinnedSection != null) { 230 // keep shadow for being recycled later 231 mRecycleSection = mPinnedSection; 232 mPinnedSection = null; 233 } 234 } 235 236 /** Makes sure we have an actual pinned shadow for given position. */ 237 void ensureShadowForPosition(int sectionPosition, int firstVisibleItem, int visibleItemCount) { 238 if (visibleItemCount < 2) { // no need for creating shadow at all, we have a single visible item 239 destroyPinnedShadow(); 240 return; 241 } 242 243 if (mPinnedSection != null 244 && mPinnedSection.position != sectionPosition) { // invalidate shadow, if required 245 destroyPinnedShadow(); 246 } 247 248 if (mPinnedSection == null) { // create shadow, if empty 249 createPinnedShadow(sectionPosition); 250 } 251 252 // align shadow according to next section position, if needed 253 int nextPosition = sectionPosition + 1; 254 if (nextPosition < getCount()) { 255 int nextSectionPosition = findFirstVisibleSectionPosition(nextPosition, 256 visibleItemCount - (nextPosition - firstVisibleItem)); 257 if (nextSectionPosition > -1) { 258 View nextSectionView = getChildAt(nextSectionPosition - firstVisibleItem); 259 final int bottom = mPinnedSection.view.getBottom() + getPaddingTop(); 260 mSectionsDistanceY = nextSectionView.getTop() - bottom; 261 if (mSectionsDistanceY < 0) { 262 // next section overlaps pinned shadow, move it up 263 mTranslateY = mSectionsDistanceY; 264 } else { 265 // next section does not overlap with pinned, stick to top 266 mTranslateY = 0; 267 } 268 } else { 269 // no other sections are visible, stick to top 270 mTranslateY = 0; 271 mSectionsDistanceY = Integer.MAX_VALUE; 272 } 273 } 274 275 } 276 277 int findFirstVisibleSectionPosition(int firstVisibleItem, int visibleItemCount) { 278 ListAdapter adapter = getAdapter(); 279 280 int adapterDataCount = adapter.getCount(); 281 if (getLastVisiblePosition() >= adapterDataCount) return -1; // dataset has changed, no candidate 282 283 if (firstVisibleItem+visibleItemCount >= adapterDataCount){//added to prevent index Outofbound (in case) 284 visibleItemCount = adapterDataCount-firstVisibleItem; 285 } 286 287 for (int childIndex = 0; childIndex < visibleItemCount; childIndex++) { 288 int position = firstVisibleItem + childIndex; 289 int viewType = adapter.getItemViewType(position); 290 if (isItemViewTypePinned(adapter, viewType)) return position; 291 } 292 return -1; 293 } 294 295 int findCurrentSectionPosition(int fromPosition) { 296 ListAdapter adapter = getAdapter(); 297 298 if (fromPosition >= adapter.getCount()) return -1; // dataset has changed, no candidate 299 300 if (adapter instanceof SectionIndexer) { 301 // try fast way by asking section indexer 302 SectionIndexer indexer = (SectionIndexer) adapter; 303 int sectionPosition = indexer.getSectionForPosition(fromPosition); 304 int itemPosition = indexer.getPositionForSection(sectionPosition); 305 int typeView = adapter.getItemViewType(itemPosition); 306 if (isItemViewTypePinned(adapter, typeView)) { 307 return itemPosition; 308 } // else, no luck 309 } 310 311 // try slow way by looking through to the next section item above 312 for (int position=fromPosition; position>=0; position--) { 313 int viewType = adapter.getItemViewType(position); 314 if (isItemViewTypePinned(adapter, viewType)) return position; 315 } 316 return -1; // no candidate found 317 } 318 319 void recreatePinnedShadow() { 320 destroyPinnedShadow(); 321 ListAdapter adapter = getAdapter(); 322 if (adapter != null && adapter.getCount() > 0) { 323 int firstVisiblePosition = getFirstVisiblePosition(); 324 int sectionPosition = findCurrentSectionPosition(firstVisiblePosition); 325 if (sectionPosition == -1) return; // no views to pin, exit 326 ensureShadowForPosition(sectionPosition, 327 firstVisiblePosition, getLastVisiblePosition() - firstVisiblePosition); 328 } 329 } 330 331 @Override 332 public void setOnScrollListener(OnScrollListener listener) { 333 if (listener == mOnScrollListener) { 334 super.setOnScrollListener(listener); 335 } else { 336 mDelegateOnScrollListener = listener; 337 } 338 } 339 340 @Override 341 public void onRestoreInstanceState(Parcelable state) { 342 super.onRestoreInstanceState(state); 343 post(new Runnable() { 344 @Override public void run() { // restore pinned view after configuration change 345 recreatePinnedShadow(); 346 } 347 }); 348 } 349 350 @Override 351 public void setAdapter(ListAdapter adapter) { 352 353 // assert adapter in debug mode 354 if (BuildConfig.DEBUG && adapter != null) { 355 if (!(adapter instanceof PinnedSectionListAdapter)) 356 throw new IllegalArgumentException("Does your adapter implement PinnedSectionListAdapter?"); 357 if (adapter.getViewTypeCount() < 2) 358 throw new IllegalArgumentException("Does your adapter handle at least two types" + 359 " of views in getViewTypeCount() method: items and sections?"); 360 } 361 362 // unregister observer at old adapter and register on new one 363 ListAdapter oldAdapter = getAdapter(); 364 if (oldAdapter != null) oldAdapter.unregisterDataSetObserver(mDataSetObserver); 365 if (adapter != null) adapter.registerDataSetObserver(mDataSetObserver); 366 367 // destroy pinned shadow, if new adapter is not same as old one 368 if (oldAdapter != adapter) destroyPinnedShadow(); 369 370 super.setAdapter(adapter); 371 } 372 373 @Override 374 protected void onLayout(boolean changed, int l, int t, int r, int b) { 375 super.onLayout(changed, l, t, r, b); 376 if (mPinnedSection != null) { 377 int parentWidth = r - l - getPaddingLeft() - getPaddingRight(); 378 int shadowWidth = mPinnedSection.view.getWidth(); 379 if (parentWidth != shadowWidth) { 380 recreatePinnedShadow(); 381 } 382 } 383 } 384 385 @Override 386 protected void dispatchDraw(Canvas canvas) { 387 super.dispatchDraw(canvas); 388 389 if (mPinnedSection != null) { 390 391 // prepare variables 392 int pLeft = getListPaddingLeft(); 393 int pTop = getListPaddingTop(); 394 View view = mPinnedSection.view; 395 396 // draw child 397 canvas.save(); 398 399 int clipHeight = view.getHeight() + 400 (mShadowDrawable == null ? 0 : Math.min(mShadowHeight, mSectionsDistanceY)); 401 canvas.clipRect(pLeft, pTop, pLeft + view.getWidth(), pTop + clipHeight); 402 403 canvas.translate(pLeft, pTop + mTranslateY); 404 drawChild(canvas, mPinnedSection.view, getDrawingTime()); 405 406 if (mShadowDrawable != null && mSectionsDistanceY > 0) { 407 mShadowDrawable.setBounds(mPinnedSection.view.getLeft(), 408 mPinnedSection.view.getBottom(), 409 mPinnedSection.view.getRight(), 410 mPinnedSection.view.getBottom() + mShadowHeight); 411 mShadowDrawable.draw(canvas); 412 } 413 414 canvas.restore(); 415 } 416 } 417 418 //-- touch handling methods 419 420 @Override 421 public boolean dispatchTouchEvent(MotionEvent ev) { 422 423 final float x = ev.getX(); 424 final float y = ev.getY(); 425 final int action = ev.getAction(); 426 427 if (action == MotionEvent.ACTION_DOWN 428 && mTouchTarget == null 429 && mPinnedSection != null 430 && isPinnedViewTouched(mPinnedSection.view, x, y)) { // create touch target 431 432 // user touched pinned view 433 mTouchTarget = mPinnedSection.view; 434 mTouchPoint.x = x; 435 mTouchPoint.y = y; 436 437 // copy down event for eventually be used later 438 mDownEvent = MotionEvent.obtain(ev); 439 } 440 441 if (mTouchTarget != null) { 442 if (isPinnedViewTouched(mTouchTarget, x, y)) { // forward event to pinned view 443 mTouchTarget.dispatchTouchEvent(ev); 444 } 445 446 if (action == MotionEvent.ACTION_UP) { // perform onClick on pinned view 447 super.dispatchTouchEvent(ev); 448 performPinnedItemClick(); 449 clearTouchTarget(); 450 451 } else if (action == MotionEvent.ACTION_CANCEL) { // cancel 452 clearTouchTarget(); 453 454 } else if (action == MotionEvent.ACTION_MOVE) { 455 if (Math.abs(y - mTouchPoint.y) > mTouchSlop) { 456 457 // cancel sequence on touch target 458 MotionEvent event = MotionEvent.obtain(ev); 459 event.setAction(MotionEvent.ACTION_CANCEL); 460 mTouchTarget.dispatchTouchEvent(event); 461 event.recycle(); 462 463 // provide correct sequence to super class for further handling 464 super.dispatchTouchEvent(mDownEvent); 465 super.dispatchTouchEvent(ev); 466 clearTouchTarget(); 467 468 } 469 } 470 471 return true; 472 } 473 474 // call super if this was not our pinned view 475 return super.dispatchTouchEvent(ev); 476 } 477 478 private boolean isPinnedViewTouched(View view, float x, float y) { 479 view.getHitRect(mTouchRect); 480 481 // by taping top or bottom padding, the list performs on click on a border item. 482 // we don't add top padding here to keep behavior consistent. 483 mTouchRect.top += mTranslateY; 484 485 mTouchRect.bottom += mTranslateY + getPaddingTop(); 486 mTouchRect.left += getPaddingLeft(); 487 mTouchRect.right -= getPaddingRight(); 488 return mTouchRect.contains((int)x, (int)y); 489 } 490 491 private void clearTouchTarget() { 492 mTouchTarget = null; 493 if (mDownEvent != null) { 494 mDownEvent.recycle(); 495 mDownEvent = null; 496 } 497 } 498 499 private boolean performPinnedItemClick() { 500 if (mPinnedSection == null) return false; 501 502 OnItemClickListener listener = getOnItemClickListener(); 503 if (listener != null && getAdapter().isEnabled(mPinnedSection.position)) { 504 View view = mPinnedSection.view; 505 playSoundEffect(SoundEffectConstants.CLICK); 506 if (view != null) { 507 view.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); 508 } 509 listener.onItemClick(this, view, mPinnedSection.position, mPinnedSection.id); 510 return true; 511 } 512 return false; 513 } 514 515 public static boolean isItemViewTypePinned(ListAdapter adapter, int viewType) { 516 if (adapter instanceof HeaderViewListAdapter) { 517 adapter = ((HeaderViewListAdapter)adapter).getWrappedAdapter(); 518 } 519 return ((PinnedSectionListAdapter) adapter).isItemViewTypePinned(viewType); 520 } 521 522 }
自己app的代碼:
1 package com.lixu.biaoqianxuanting; 2 3 import java.util.ArrayList; 4 import com.lixu.biaoqianxuanting.PinnedSectionListView.PinnedSectionListAdapter; 5 import android.app.Activity; 6 import android.content.Context; 7 import android.graphics.Color; 8 import android.os.Bundle; 9 import android.view.LayoutInflater; 10 import android.view.View; 11 import android.view.ViewGroup; 12 import android.widget.ArrayAdapter; 13 import android.widget.TextView; 14 15 public class MainActivity extends Activity { 16 private ArrayList<Data> data; 17 18 @Override 19 protected void onCreate(Bundle savedInstanceState) { 20 super.onCreate(savedInstanceState); 21 setContentView(R.layout.activity_main); 22 23 String[] s = { "家人", "朋友", "同事", "同學", "基友", "情人", "老婆" }; 24 25 data = new ArrayList<Data>(); 26 for (String n : s) { 27 Data group = new Data(); 28 group.type = Data.GROUP; 29 group.text = n; 30 data.add(group); 31 for (int i = 0; i < 10; i++) { 32 Data child = new Data(); 33 child.type = Data.CHILD; 34 child.text = "聯系人" + i; 35 data.add(child); 36 } 37 } 38 39 PinnedSectionListView pslv = (PinnedSectionListView) findViewById(R.id.pslv); 40 MyAdapter mMyAdapter = new MyAdapter(this, -1); 41 pslv.setAdapter(mMyAdapter); 42 } 43 44 // 定義一個存放數據類型的類 45 private class Data { 46 public static final int GROUP = 0; 47 public static final int CHILD = 1; 48 public int type; 49 public String text; 50 // 2個type child和group 51 public static final int TYPE_COUNT = 2; 52 53 } 54 55 // 定義適配器要實現PinnedSectionListAdapter接口 來調用isItemViewTypePinned(int 56 // viewType)方法 57 private class MyAdapter extends ArrayAdapter implements PinnedSectionListAdapter { 58 private LayoutInflater flater; 59 60 public MyAdapter(Context context, int resource) { 61 super(context, resource); 62 63 flater = LayoutInflater.from(context); 64 } 65 66 @Override 67 public int getCount() { 68 return data.size(); 69 } 70 71 @Override 72 public View getView(int position, View convertView, ViewGroup parent) { 73 int type = getItemViewType(position); 74 switch (type) { 75 case Data.GROUP: 76 if (convertView == null) 77 convertView = flater.inflate(android.R.layout.simple_list_item_1, null); 78 79 TextView tv1 = (TextView) convertView.findViewById(android.R.id.text1); 80 81 tv1.setText(data.get(position).text); 82 tv1.setBackgroundColor(Color.BLUE); 83 tv1.setTextSize(35); 84 85 break; 86 87 case Data.CHILD: 88 if (convertView == null) 89 convertView = flater.inflate(android.R.layout.simple_list_item_1, null); 90 91 TextView tv2 = (TextView) convertView.findViewById(android.R.id.text1); 92 93 tv2.setText(data.get(position).text); 94 95 tv2.setTextSize(15); 96 97 break; 98 99 default: 100 break; 101 } 102 103 return convertView; 104 } 105 106 // 返回列表類型 兩種 child和group 107 @Override 108 public int getViewTypeCount() { 109 110 return Data.TYPE_COUNT; 111 } 112 113 // 獲取列表類型 114 @Override 115 public int getItemViewType(int position) { 116 return data.get(position).type; 117 } 118 119 @Override 120 public Object getItem(int position) { 121 return data.get(position); 122 } 123 124 // 假設此方法返回皆為false。那麼PinnedSectionListView將退化成為一個基礎的ListView. 125 // 只不過退化後的ListView只是一個擁有兩個View Type的ListView。 126 // 從某種角度上講,此方法對於PinnedSectionListView至關重要,因為返回值true或false,將直接導致PinnedSectionListView是一個PinnedSectionListView,還是一個普通的ListView。 127 @Override 128 public boolean isItemViewTypePinned(int viewType) { 129 boolean type = false; 130 switch (viewType) { 131 case Data.GROUP: 132 133 type = true; 134 135 break; 136 137 case Data.CHILD: 138 139 type = false; 140 141 break; 142 default: 143 type = false; 144 break; 145 } 146 return type; 147 } 148 149 } 150 151 }
xml文件:
1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" > 5 6 <com.lixu.biaoqianxuanting.PinnedSectionListView 7 android:id="@+id/pslv" 8 android:layout_width="match_parent" 9 android:layout_height="match_parent" /> 10 11 </RelativeLayout>
運行效果圖:
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