Android开发中大量使用XML代码作为界面的布局，使用styles能大幅精简XML代码。

比如下面这个界面从AlertDialog至PlacePickerWindow有19个样式相同的跳转Item，点击后颜色加深并跳转界面。

使用styles前XML代码是这样的(838行)：

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     android:layout_width="fill_parent"
  4     android:layout_height="fill_parent"
  5     android:background="@color/activity_bg"
  6     android:orientation="vertical"
  7     android:splitMotionEvents="false" >
  8 
  9     <RelativeLayout
 10         android:id="@+id/rlDemoMainTopbar"
 11         android:layout_width="fill_parent"
 12         android:layout_height="@dimen/topbar_height"
 13         android:background="@color/topbar_bg"
 14         android:gravity="center_vertical" >
 15 
 16         <TextView
 17             android:id="@+id/tvDemoMainReturn"
 18             android:layout_width="wrap_content"
 19             android:layout_height="@dimen/topbar_height"
 20             android:layout_alignParentLeft="true"
 21             android:background="@drawable/bg_item_to_alpha"
 22             android:gravity="center"
 23             android:minWidth="40dp"
 24             android:paddingLeft="10dp"
 25             android:paddingRight="10dp"
 26             android:text="退出"
 27             android:textColor="@color/white"
 28             android:textSize="16sp" />
 29 
 30         <TextView
 31             android:layout_width="wrap_content"
 32             android:layout_height="match_parent"
 33             android:layout_centerHorizontal="true"
 34             android:gravity="center"
 35             android:text="坐标标准库"
 36             android:textColor="@color/black"
 37             android:textSize="18sp" />
 38 
 39         <ImageView
 40             android:id="@+id/ivDemoMainMenu"
 41             android:layout_width="wrap_content"
 42             android:layout_height="@dimen/topbar_height"
 43             android:layout_alignParentRight="true"
 44             android:background="@drawable/bg_item_to_alpha"
 45             android:gravity="center"
 46             android:minHeight="@dimen/topbar_height"
 47             android:minWidth="40dp"
 48             android:paddingLeft="8dp"
 49             android:paddingRight="10dp"
 50             android:src="@drawable/menu"
 51             android:textColor="@color/white"
 52             android:textSize="16sp" />
 53     </RelativeLayout>
 54 
 55     <ScrollView
 56         android:id="@+id/svDemoMain"
 57         android:layout_width="match_parent"
 58         android:layout_height="match_parent"
 59         android:layout_weight="1"
 60         android:gravity="center_horizontal"
 61         android:orientation="vertical" >
 62 
 63         <LinearLayout
 64             android:layout_width="match_parent"
 65             android:layout_height="match_parent"
 66             android:gravity="center_horizontal"
 67             android:orientation="vertical" >
 68 
 69             <ImageView
 70                 android:id="@+id/ivDemoMainHead"
 71                 android:layout_width="90dp"
 72                 android:layout_height="90dp"
 73                 android:layout_margin="@dimen/common_item_distance"
 74                 android:background="@color/alpha_3"
 75                 android:scaleType="centerCrop" />
 76 
 77             <TextView
 78                 android:id="@+id/tvDemoMainHeadName"
 79                 android:layout_width="match_parent"
 80                 android:layout_height="@dimen/common_item_remind_tv_height"
 81                 android:gravity="center"
 82                 android:text="可点击 选择图片 或 裁剪图片 更改"
 83                 android:textColor="@color/gray_1"
 84                 android:textSize="14sp" />
 85 
 86             <TextView
 87                 android:layout_width="wrap_content"
 88                 android:layout_height="wrap_content"
 89                 android:gravity="center"
 90                 android:paddingBottom="6dp"
 91                 android:paddingTop="30dp"
 92                 android:text="Dialog"
 93                 android:textColor="@color/gray_3"
 94                 android:textSize="@dimen/text_size_big" />
 95 
 96             <View
 97                 android:layout_width="fill_parent"
 98                 android:layout_height="1px"
 99                 android:background="@color/alpha_3" />
100 
101             <LinearLayout
102                 android:id="@+id/llDemoMainAlertDialog"
103                 android:layout_width="match_parent"
104                 android:layout_height="50dp"
105                 android:background="@drawable/bg_white_to_gray"
106                 android:gravity="center_vertical"
107                 android:orientation="horizontal"
108                 android:paddingBottom="2dp"
109                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
110                 android:paddingTop="2dp" >
111 
112                 <TextView
113                     android:layout_width="wrap_content"
114                     android:layout_height="wrap_content"
115                     android:layout_weight="1"
116                     android:gravity="left|center"
117                     android:paddingRight="@dimen/padding_big"
118                     android:singleLine="true"
119                     android:text="AlertDialog"
120                     android:textColor="@color/gray_3"
121                     android:textSize="@dimen/text_size_middle" />
122 
123                 <ImageView
124                     android:layout_width="wrap_content"
125                     android:layout_height="match_parent"
126                     android:gravity="center"
127                     android:paddingLeft="@dimen/padding_micro"
128                     android:src="@drawable/forward2_light"
129                     android:textColor="@color/gray_3"
130                     android:textSize="@dimen/text_size_middle" />
131             </LinearLayout>
132 
133             <View
134                 android:layout_width="fill_parent"
135                 android:layout_height="1px"
136                 android:background="@color/alpha_3" />
137 
138             <LinearLayout
139                 android:id="@+id/llDemoMainItemDialog"
140                 android:layout_width="match_parent"
141                 android:layout_height="50dp"
142                 android:background="@drawable/bg_white_to_gray"
143                 android:gravity="center_vertical"
144                 android:orientation="horizontal"
145                 android:paddingBottom="2dp"
146                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
147                 android:paddingTop="2dp" >
148 
149                 <TextView
150                     android:layout_width="wrap_content"
151                     android:layout_height="wrap_content"
152                     android:layout_weight="1"
153                     android:gravity="left|center"
154                     android:paddingRight="@dimen/padding_big"
155                     android:singleLine="true"
156                     android:text="ItemDialog"
157                     android:textColor="@color/gray_3"
158                     android:textSize="@dimen/text_size_middle" />
159 
160                 <ImageView
161                     android:layout_width="wrap_content"
162                     android:layout_height="match_parent"
163                     android:gravity="center"
164                     android:paddingLeft="@dimen/padding_micro"
165                     android:src="@drawable/forward2_light"
166                     android:textColor="@color/gray_3"
167                     android:textSize="@dimen/text_size_middle" />
168             </LinearLayout>
169 
170             <View
171                 android:layout_width="fill_parent"
172                 android:layout_height="1px"
173                 android:background="@color/alpha_3" />
174 
175             <TextView
176                 android:layout_width="wrap_content"
177                 android:layout_height="wrap_content"
178                 android:gravity="center"
179                 android:paddingBottom="6dp"
180                 android:paddingTop="30dp"
181                 android:text="Activity"
182                 android:textColor="@color/gray_3"
183                 android:textSize="@dimen/text_size_big" />
184 
185             <View
186                 android:layout_width="fill_parent"
187                 android:layout_height="1px"
188                 android:background="@color/alpha_3" />
189 
190             <LinearLayout
191                 android:id="@+id/llDemoMainScanActivity"
192                 android:layout_width="match_parent"
193                 android:layout_height="50dp"
194                 android:background="@drawable/bg_white_to_gray"
195                 android:gravity="center_vertical"
196                 android:orientation="horizontal"
197                 android:paddingBottom="2dp"
198                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
199                 android:paddingTop="2dp" >
200 
201                 <TextView
202                     android:layout_width="wrap_content"
203                     android:layout_height="wrap_content"
204                     android:layout_weight="1"
205                     android:gravity="left|center"
206                     android:paddingRight="@dimen/padding_big"
207                     android:singleLine="true"
208                     android:text="ScanActivity"
209                     android:textColor="@color/gray_3"
210                     android:textSize="@dimen/text_size_middle" />
211 
212                 <ImageView
213                     android:layout_width="wrap_content"
214                     android:layout_height="match_parent"
215                     android:gravity="center"
216                     android:paddingLeft="@dimen/padding_micro"
217                     android:src="@drawable/forward2_light"
218                     android:textColor="@color/gray_3"
219                     android:textSize="@dimen/text_size_middle" />
220             </LinearLayout>
221 
222             <View
223                 android:layout_width="fill_parent"
224                 android:layout_height="1px"
225                 android:background="@color/alpha_3" />
226 
227             <LinearLayout
228                 android:id="@+id/llDemoMainSelectPictureActivity"
229                 android:layout_width="match_parent"
230                 android:layout_height="50dp"
231                 android:background="@drawable/bg_white_to_gray"
232                 android:gravity="center_vertical"
233                 android:orientation="horizontal"
234                 android:paddingBottom="2dp"
235                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
236                 android:paddingTop="2dp" >
237 
238                 <TextView
239                     android:layout_width="wrap_content"
240                     android:layout_height="wrap_content"
241                     android:layout_weight="1"
242                     android:gravity="left|center"
243                     android:paddingRight="@dimen/padding_big"
244                     android:singleLine="true"
245                     android:text="SelectPictureActivity"
246                     android:textColor="@color/gray_3"
247                     android:textSize="@dimen/text_size_middle" />
248 
249                 <ImageView
250                     android:layout_width="wrap_content"
251                     android:layout_height="match_parent"
252                     android:gravity="center"
253                     android:paddingLeft="@dimen/padding_micro"
254                     android:src="@drawable/forward2_light"
255                     android:textColor="@color/gray_3"
256                     android:textSize="@dimen/text_size_middle" />
257             </LinearLayout>
258 
259             <View
260                 android:layout_width="fill_parent"
261                 android:layout_height="1px"
262                 android:background="@color/alpha_3" />
263 
264             <LinearLayout
265                 android:id="@+id/llDemoMainCutPictureActivity"
266                 android:layout_width="match_parent"
267                 android:layout_height="50dp"
268                 android:background="@drawable/bg_white_to_gray"
269                 android:gravity="center_vertical"
270                 android:orientation="horizontal"
271                 android:paddingBottom="2dp"
272                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
273                 android:paddingTop="2dp" >
274 
275                 <TextView
276                     android:layout_width="wrap_content"
277                     android:layout_height="wrap_content"
278                     android:layout_weight="1"
279                     android:gravity="left|center"
280                     android:paddingRight="@dimen/padding_big"
281                     android:singleLine="true"
282                     android:text="CutPictureActivity"
283                     android:textColor="@color/gray_3"
284                     android:textSize="@dimen/text_size_middle" />
285 
286                 <ImageView
287                     android:layout_width="wrap_content"
288                     android:layout_height="match_parent"
289                     android:gravity="center"
290                     android:paddingLeft="@dimen/padding_micro"
291                     android:src="@drawable/forward2_light"
292                     android:textColor="@color/gray_3"
293                     android:textSize="@dimen/text_size_middle" />
294             </LinearLayout>
295 
296             <View
297                 android:layout_width="fill_parent"
298                 android:layout_height="1px"
299                 android:background="@color/alpha_3" />
300 
301             <LinearLayout
302                 android:id="@+id/llDemoMainWebViewActivity"
303                 android:layout_width="match_parent"
304                 android:layout_height="50dp"
305                 android:background="@drawable/bg_white_to_gray"
306                 android:gravity="center_vertical"
307                 android:orientation="horizontal"
308                 android:paddingBottom="2dp"
309                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
310                 android:paddingTop="2dp" >
311 
312                 <TextView
313                     android:layout_width="wrap_content"
314                     android:layout_height="wrap_content"
315                     android:layout_weight="1"
316                     android:gravity="left|center"
317                     android:paddingRight="@dimen/padding_big"
318                     android:singleLine="true"
319                     android:text="WebViewActivity"
320                     android:textColor="@color/gray_3"
321                     android:textSize="@dimen/text_size_middle" />
322 
323                 <ImageView
324                     android:layout_width="wrap_content"
325                     android:layout_height="match_parent"
326                     android:gravity="center"
327                     android:paddingLeft="@dimen/padding_micro"
328                     android:src="@drawable/forward2_light"
329                     android:textColor="@color/gray_3"
330                     android:textSize="@dimen/text_size_middle" />
331             </LinearLayout>
332 
333             <View
334                 android:layout_width="fill_parent"
335                 android:layout_height="1px"
336                 android:background="@color/alpha_3" />
337 
338             <LinearLayout
339                 android:id="@+id/llDemoMainEditTextInfoActivity"
340                 android:layout_width="match_parent"
341                 android:layout_height="50dp"
342                 android:background="@drawable/bg_white_to_gray"
343                 android:gravity="center_vertical"
344                 android:orientation="horizontal"
345                 android:paddingBottom="2dp"
346                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
347                 android:paddingTop="2dp" >
348 
349                 <TextView
350                     android:layout_width="wrap_content"
351                     android:layout_height="wrap_content"
352                     android:layout_weight="1"
353                     android:gravity="left|center"
354                     android:paddingRight="@dimen/padding_big"
355                     android:singleLine="true"
356                     android:text="EditTextInfoActivity"
357                     android:textColor="@color/gray_3"
358                     android:textSize="@dimen/text_size_middle" />
359 
360                 <ImageView
361                     android:layout_width="wrap_content"
362                     android:layout_height="match_parent"
363                     android:gravity="center"
364                     android:paddingLeft="@dimen/padding_micro"
365                     android:src="@drawable/forward2_light"
366                     android:textColor="@color/gray_3"
367                     android:textSize="@dimen/text_size_middle" />
368             </LinearLayout>
369 
370             <View
371                 android:layout_width="fill_parent"
372                 android:layout_height="1px"
373                 android:background="@color/alpha_3" />
374 
375             <LinearLayout
376                 android:id="@+id/llDemoMainServerSettingActivity"
377                 android:layout_width="match_parent"
378                 android:layout_height="50dp"
379                 android:background="@drawable/bg_white_to_gray"
380                 android:gravity="center_vertical"
381                 android:orientation="horizontal"
382                 android:paddingBottom="2dp"
383                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
384                 android:paddingTop="2dp" >
385 
386                 <TextView
387                     android:layout_width="wrap_content"
388                     android:layout_height="wrap_content"
389                     android:layout_weight="1"
390                     android:gravity="left|center"
391                     android:paddingRight="@dimen/padding_big"
392                     android:singleLine="true"
393                     android:text="ServerSettingActivity"
394                     android:textColor="@color/gray_3"
395                     android:textSize="@dimen/text_size_middle" />
396 
397                 <ImageView
398                     android:layout_width="wrap_content"
399                     android:layout_height="match_parent"
400                     android:gravity="center"
401                     android:paddingLeft="@dimen/padding_micro"
402                     android:src="@drawable/forward2_light"
403                     android:textColor="@color/gray_3"
404                     android:textSize="@dimen/text_size_middle" />
405             </LinearLayout>
406 
407             <View
408                 android:layout_width="fill_parent"
409                 android:layout_height="1px"
410                 android:layout_marginBottom="15dp"
411                 android:background="@color/alpha_3" />
412 
413             <LinearLayout
414                 android:id="@+id/llDemoMainDemoActivity"
415                 android:layout_width="match_parent"
416                 android:layout_height="50dp"
417                 android:background="@drawable/bg_white_to_gray"
418                 android:gravity="center_vertical"
419                 android:orientation="horizontal"
420                 android:paddingBottom="2dp"
421                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
422                 android:paddingTop="2dp" >
423 
424                 <TextView
425                     android:layout_width="wrap_content"
426                     android:layout_height="wrap_content"
427                     android:layout_weight="1"
428                     android:gravity="left|center"
429                     android:paddingRight="@dimen/padding_big"
430                     android:singleLine="true"
431                     android:text="DemoActivity"
432                     android:textColor="@color/gray_3"
433                     android:textSize="@dimen/text_size_middle" />
434 
435                 <ImageView
436                     android:layout_width="wrap_content"
437                     android:layout_height="match_parent"
438                     android:gravity="center"
439                     android:paddingLeft="@dimen/padding_micro"
440                     android:src="@drawable/forward2_light"
441                     android:textColor="@color/gray_3"
442                     android:textSize="@dimen/text_size_middle" />
443             </LinearLayout>
444 
445             <View
446                 android:layout_width="fill_parent"
447                 android:layout_height="1px"
448                 android:background="@color/alpha_3" />
449 
450             <LinearLayout
451                 android:id="@+id/llDemoMainDemoListActivity"
452                 android:layout_width="match_parent"
453                 android:layout_height="50dp"
454                 android:background="@drawable/bg_white_to_gray"
455                 android:gravity="center_vertical"
456                 android:orientation="horizontal"
457                 android:paddingBottom="2dp"
458                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
459                 android:paddingTop="2dp" >
460 
461                 <TextView
462                     android:layout_width="wrap_content"
463                     android:layout_height="wrap_content"
464                     android:layout_weight="1"
465                     android:gravity="left|center"
466                     android:paddingRight="@dimen/padding_big"
467                     android:singleLine="true"
468                     android:text="DemoListActivity"
469                     android:textColor="@color/gray_3"
470                     android:textSize="@dimen/text_size_middle" />
471 
472                 <ImageView
473                     android:layout_width="wrap_content"
474                     android:layout_height="match_parent"
475                     android:gravity="center"
476                     android:paddingLeft="@dimen/padding_micro"
477                     android:src="@drawable/forward2_light"
478                     android:textColor="@color/gray_3"
479                     android:textSize="@dimen/text_size_middle" />
480             </LinearLayout>
481 
482             <View
483                 android:layout_width="fill_parent"
484                 android:layout_height="1px"
485                 android:background="@color/alpha_3" />
486 
487             <LinearLayout
488                 android:id="@+id/llDemoMainDemoFragmentActivity"
489                 android:layout_width="match_parent"
490                 android:layout_height="50dp"
491                 android:background="@drawable/bg_white_to_gray"
492                 android:gravity="center_vertical"
493                 android:orientation="horizontal"
494                 android:paddingBottom="2dp"
495                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
496                 android:paddingTop="2dp" >
497 
498                 <TextView
499                     android:layout_width="wrap_content"
500                     android:layout_height="wrap_content"
501                     android:layout_weight="1"
502                     android:gravity="left|center"
503                     android:paddingRight="@dimen/padding_big"
504                     android:singleLine="true"
505                     android:text="DemoFragmentActivity"
506                     android:textColor="@color/gray_3"
507                     android:textSize="@dimen/text_size_middle" />
508 
509                 <ImageView
510                     android:layout_width="wrap_content"
511                     android:layout_height="match_parent"
512                     android:gravity="center"
513                     android:paddingLeft="@dimen/padding_micro"
514                     android:src="@drawable/forward2_light"
515                     android:textColor="@color/gray_3"
516                     android:textSize="@dimen/text_size_middle" />
517             </LinearLayout>
518 
519             <View
520                 android:layout_width="fill_parent"
521                 android:layout_height="1px"
522                 android:background="@color/alpha_3" />
523 
524             <LinearLayout
525                 android:id="@+id/llDemoMainDemoTabActivity"
526                 android:layout_width="match_parent"
527                 android:layout_height="50dp"
528                 android:background="@drawable/bg_white_to_gray"
529                 android:gravity="center_vertical"
530                 android:orientation="horizontal"
531                 android:paddingBottom="2dp"
532                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
533                 android:paddingTop="2dp" >
534 
535                 <TextView
536                     android:layout_width="wrap_content"
537                     android:layout_height="wrap_content"
538                     android:layout_weight="1"
539                     android:gravity="left|center"
540                     android:paddingRight="@dimen/padding_big"
541                     android:singleLine="true"
542                     android:text="DemoTabActivity"
543                     android:textColor="@color/gray_3"
544                     android:textSize="@dimen/text_size_middle" />
545 
546                 <ImageView
547                     android:layout_width="wrap_content"
548                     android:layout_height="match_parent"
549                     android:gravity="center"
550                     android:paddingLeft="@dimen/padding_micro"
551                     android:src="@drawable/forward2_light"
552                     android:textColor="@color/gray_3"
553                     android:textSize="@dimen/text_size_middle" />
554             </LinearLayout>
555 
556             <View
557                 android:layout_width="fill_parent"
558                 android:layout_height="1px"
559                 android:background="@color/alpha_3" />
560 
561             <LinearLayout
562                 android:id="@+id/llDemoMainDemoTimeRefresherActivity"
563                 android:layout_width="match_parent"
564                 android:layout_height="50dp"
565                 android:background="@drawable/bg_white_to_gray"
566                 android:gravity="center_vertical"
567                 android:orientation="horizontal"
568                 android:paddingBottom="2dp"
569                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
570                 android:paddingTop="2dp" >
571 
572                 <TextView
573                     android:layout_width="wrap_content"
574                     android:layout_height="wrap_content"
575                     android:layout_weight="1"
576                     android:gravity="left|center"
577                     android:paddingRight="@dimen/padding_big"
578                     android:singleLine="true"
579                     android:text="DemoTimeRefresherActivity"
580                     android:textColor="@color/gray_3"
581                     android:textSize="@dimen/text_size_middle" />
582 
583                 <ImageView
584                     android:layout_width="wrap_content"
585                     android:layout_height="match_parent"
586                     android:gravity="center"
587                     android:paddingLeft="@dimen/padding_micro"
588                     android:src="@drawable/forward2_light"
589                     android:textColor="@color/gray_3"
590                     android:textSize="@dimen/text_size_middle" />
591             </LinearLayout>
592 
593             <View
594                 android:layout_width="fill_parent"
595                 android:layout_height="1px"
596                 android:background="@color/alpha_3" />
597 
598             <LinearLayout
599                 android:id="@+id/llDemoMainDemoBroadcastReceiverActivity"
600                 android:layout_width="match_parent"
601                 android:layout_height="50dp"
602                 android:background="@drawable/bg_white_to_gray"
603                 android:gravity="center_vertical"
604                 android:orientation="horizontal"
605                 android:paddingBottom="2dp"
606                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
607                 android:paddingTop="2dp" >
608 
609                 <TextView
610                     android:layout_width="wrap_content"
611                     android:layout_height="wrap_content"
612                     android:layout_weight="1"
613                     android:gravity="left|center"
614                     android:paddingRight="@dimen/padding_big"
615                     android:singleLine="true"
616                     android:text="DemoBroadcastReceiverActivity"
617                     android:textColor="@color/gray_3"
618                     android:textSize="@dimen/text_size_middle" />
619 
620                 <ImageView
621                     android:layout_width="wrap_content"
622                     android:layout_height="match_parent"
623                     android:gravity="center"
624                     android:paddingLeft="@dimen/padding_micro"
625                     android:src="@drawable/forward2_light"
626                     android:textColor="@color/gray_3"
627                     android:textSize="@dimen/text_size_middle" />
628             </LinearLayout>
629 
630             <View
631                 android:layout_width="fill_parent"
632                 android:layout_height="1px"
633                 android:background="@color/alpha_3" />
634 
635             <TextView
636                 android:layout_width="wrap_content"
637                 android:layout_height="wrap_content"
638                 android:gravity="center"
639                 android:paddingBottom="6dp"
640                 android:paddingTop="30dp"
641                 android:text="Window"
642                 android:textColor="@color/gray_3"
643                 android:textSize="@dimen/text_size_big" />
644 
645             <View
646                 android:layout_width="fill_parent"
647                 android:layout_height="1px"
648                 android:background="@color/alpha_3" />
649 
650             <LinearLayout
651                 android:id="@+id/llDemoMainTopMenuWindow"
652                 android:layout_width="match_parent"
653                 android:layout_height="50dp"
654                 android:background="@drawable/bg_white_to_gray"
655                 android:gravity="center_vertical"
656                 android:orientation="horizontal"
657                 android:paddingBottom="2dp"
658                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
659                 android:paddingTop="2dp" >
660 
661                 <TextView
662                     android:layout_width="wrap_content"
663                     android:layout_height="wrap_content"
664                     android:layout_weight="1"
665                     android:gravity="left|center"
666                     android:paddingRight="@dimen/padding_big"
667                     android:singleLine="true"
668                     android:text="TopMenuWindow"
669                     android:textColor="@color/gray_3"
670                     android:textSize="@dimen/text_size_middle" />
671 
672                 <ImageView
673                     android:layout_width="wrap_content"
674                     android:layout_height="match_parent"
675                     android:gravity="center"
676                     android:paddingLeft="@dimen/padding_micro"
677                     android:src="@drawable/forward2_light"
678                     android:textColor="@color/gray_3"
679                     android:textSize="@dimen/text_size_middle" />
680             </LinearLayout>
681 
682             <View
683                 android:layout_width="fill_parent"
684                 android:layout_height="1px"
685                 android:background="@color/alpha_3" />
686 
687             <LinearLayout
688                 android:id="@+id/llDemoMainBottomMenuWindow"
689                 android:layout_width="match_parent"
690                 android:layout_height="50dp"
691                 android:background="@drawable/bg_white_to_gray"
692                 android:gravity="center_vertical"
693                 android:orientation="horizontal"
694                 android:paddingBottom="2dp"
695                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
696                 android:paddingTop="2dp" >
697 
698                 <TextView
699                     android:layout_width="wrap_content"
700                     android:layout_height="wrap_content"
701                     android:layout_weight="1"
702                     android:gravity="left|center"
703                     android:paddingRight="@dimen/padding_big"
704                     android:singleLine="true"
705                     android:text="BottomMenuWindow"
706                     android:textColor="@color/gray_3"
707                     android:textSize="@dimen/text_size_middle" />
708 
709                 <ImageView
710                     android:layout_width="wrap_content"
711                     android:layout_height="match_parent"
712                     android:gravity="center"
713                     android:paddingLeft="@dimen/padding_micro"
714                     android:src="@drawable/forward2_light"
715                     android:textColor="@color/gray_3"
716                     android:textSize="@dimen/text_size_middle" />
717             </LinearLayout>
718 
719             <View
720                 android:layout_width="fill_parent"
721                 android:layout_height="1px"
722                 android:background="@color/alpha_3" />
723 
724             <LinearLayout
725                 android:id="@+id/llDemoMainEditTextInfoWindow"
726                 android:layout_width="match_parent"
727                 android:layout_height="50dp"
728                 android:background="@drawable/bg_white_to_gray"
729                 android:gravity="center_vertical"
730                 android:orientation="horizontal"
731                 android:paddingBottom="2dp"
732                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
733                 android:paddingTop="2dp" >
734 
735                 <TextView
736                     android:layout_width="wrap_content"
737                     android:layout_height="wrap_content"
738                     android:layout_weight="1"
739                     android:gravity="left|center"
740                     android:paddingRight="@dimen/padding_big"
741                     android:singleLine="true"
742                     android:text="EditTextInfoWindow"
743                     android:textColor="@color/gray_3"
744                     android:textSize="@dimen/text_size_middle" />
745 
746                 <ImageView
747                     android:layout_width="wrap_content"
748                     android:layout_height="match_parent"
749                     android:gravity="center"
750                     android:paddingLeft="@dimen/padding_micro"
751                     android:src="@drawable/forward2_light"
752                     android:textColor="@color/gray_3"
753                     android:textSize="@dimen/text_size_middle" />
754             </LinearLayout>
755 
756             <View
757                 android:layout_width="fill_parent"
758                 android:layout_height="1px"
759                 android:background="@color/alpha_3" />
760 
761             <LinearLayout
762                 android:id="@+id/llDemoMainDatePickerWindow"
763                 android:layout_width="match_parent"
764                 android:layout_height="50dp"
765                 android:background="@drawable/bg_white_to_gray"
766                 android:gravity="center_vertical"
767                 android:orientation="horizontal"
768                 android:paddingBottom="2dp"
769                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
770                 android:paddingTop="2dp" >
771 
772                 <TextView
773                     android:layout_width="wrap_content"
774                     android:layout_height="wrap_content"
775                     android:layout_weight="1"
776                     android:gravity="left|center"
777                     android:paddingRight="@dimen/padding_big"
778                     android:singleLine="true"
779                     android:text="DatePickerWindow"
780                     android:textColor="@color/gray_3"
781                     android:textSize="@dimen/text_size_middle" />
782 
783                 <ImageView
784                     android:layout_width="wrap_content"
785                     android:layout_height="match_parent"
786                     android:gravity="center"
787                     android:paddingLeft="@dimen/padding_micro"
788                     android:src="@drawable/forward2_light"
789                     android:textColor="@color/gray_3"
790                     android:textSize="@dimen/text_size_middle" />
791             </LinearLayout>
792 
793             <View
794                 android:layout_width="fill_parent"
795                 android:layout_height="1px"
796                 android:background="@color/alpha_3" />
797 
798             <LinearLayout
799                 android:id="@+id/llDemoMainPlacePickerWindow"
800                 android:layout_width="match_parent"
801                 android:layout_height="50dp"
802                 android:background="@drawable/bg_white_to_gray"
803                 android:gravity="center_vertical"
804                 android:orientation="horizontal"
805                 android:paddingBottom="2dp"
806                 android:paddingLeft="@dimen/content_item_left_tv_padding_left"
807                 android:paddingTop="2dp" >
808 
809                 <TextView
810                     android:layout_width="wrap_content"
811                     android:layout_height="wrap_content"
812                     android:layout_weight="1"
813                     android:gravity="left|center"
814                     android:paddingRight="@dimen/padding_big"
815                     android:singleLine="true"
816                     android:text="PlacePickerWindow"
817                     android:textColor="@color/gray_3"
818                     android:textSize="@dimen/text_size_middle" />
819 
820                 <ImageView
821                     android:layout_width="wrap_content"
822                     android:layout_height="match_parent"
823                     android:gravity="center"
824                     android:paddingLeft="@dimen/padding_micro"
825                     android:src="@drawable/forward2_light"
826                     android:textColor="@color/gray_3"
827                     android:textSize="@dimen/text_size_middle" />
828             </LinearLayout>
829 
830             <View
831                 android:layout_width="fill_parent"
832                 android:layout_height="1px"
833                 android:layout_marginBottom="30dp"
834                 android:background="@color/alpha_3" />
835         </LinearLayout>
836     </ScrollView>
837 
838 </LinearLayout>

使用styles后XML代码变成了这样(345行，原来的41%)：

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     style="@style/activity_page" >
  4 
  5     <RelativeLayout
  6         android:id="@+id/rlDemoMainTopbar"
  7         style="@style/topbar_bg" >
  8 
  9         <TextView
 10             android:id="@+id/tvDemoMainReturn"
 11             style="@style/topbar_return_tv"
 12             android:text="退出" />
 13 
 14         <TextView
 15             style="@style/topbar_title"
 16             android:layout_centerHorizontal="true"
 17             android:text="坐标标准库" />
 18 
 19         <ImageView
 20             android:id="@+id/ivDemoMainMenu"
 21             style="@style/topbar_right_btn"
 22             android:src="@drawable/menu" />
 23     </RelativeLayout>
 24 
 25     <ScrollView
 26         android:id="@+id/svDemoMain"
 27         style="@style/ll_vertical_match_match"
 28         android:layout_weight="1" >
 29 
 30         <LinearLayout style="@style/ll_vertical_match_match" >
 31 
 32             <ImageView
 33                 android:id="@+id/ivDemoMainHead"
 34                 android:layout_width="90dp"
 35                 android:layout_height="90dp"
 36                 android:layout_margin="@dimen/common_item_distance"
 37                 android:background="@color/alpha_3"
 38                 android:scaleType="centerCrop" />
 39 
 40             <TextView
 41                 android:id="@+id/tvDemoMainHeadName"
 42                 android:layout_width="match_parent"
 43                 android:layout_height="@dimen/common_item_remind_tv_height"
 44                 android:gravity="center"
 45                 android:text="可点击 选择图片 或 裁剪图片 更改"
 46                 android:textColor="@color/gray_1"
 47                 android:textSize="14sp" />
 48 
 49             <TextView
 50                 style="@style/text_big"
 51                 android:paddingBottom="6dp"
 52                 android:paddingTop="30dp"
 53                 android:text="Dialog" />
 54 
 55             <View style="@style/divider_horizontal_1px" />
 56 
 57             <LinearLayout
 58                 android:id="@+id/llDemoMainAlertDialog"
 59                 style="@style/content_item_white" >
 60 
 61                 <TextView
 62                     style="@style/content_item_lf_tv"
 63                     android:layout_weight="1"
 64                     android:text="AlertDialog" />
 65 
 66                 <ImageView style="@style/content_item_rt_img" />
 67             </LinearLayout>
 68 
 69             <View style="@style/divider_horizontal_1px" />
 70 
 71             <LinearLayout
 72                 android:id="@+id/llDemoMainItemDialog"
 73                 style="@style/content_item_white" >
 74 
 75                 <TextView
 76                     style="@style/content_item_lf_tv"
 77                     android:layout_weight="1"
 78                     android:text="ItemDialog" />
 79 
 80                 <ImageView style="@style/content_item_rt_img" />
 81             </LinearLayout>
 82 
 83             <View style="@style/divider_horizontal_1px" />
 84 
 85             <TextView
 86                 style="@style/text_big"
 87                 android:paddingBottom="6dp"
 88                 android:paddingTop="30dp"
 89                 android:text="Activity" />
 90 
 91             <View style="@style/divider_horizontal_1px" />
 92 
 93             <LinearLayout
 94                 android:id="@+id/llDemoMainScanActivity"
 95                 style="@style/content_item_white" >
 96 
 97                 <TextView
 98                     style="@style/content_item_lf_tv"
 99                     android:layout_weight="1"
100                     android:text="ScanActivity" />
101 
102                 <ImageView style="@style/content_item_rt_img" />
103             </LinearLayout>
104 
105             <View style="@style/divider_horizontal_1px" />
106 
107             <LinearLayout
108                 android:id="@+id/llDemoMainSelectPictureActivity"
109                 style="@style/content_item_white" >
110 
111                 <TextView
112                     style="@style/content_item_lf_tv"
113                     android:layout_weight="1"
114                     android:text="SelectPictureActivity" />
115 
116                 <ImageView style="@style/content_item_rt_img" />
117             </LinearLayout>
118 
119             <View style="@style/divider_horizontal_1px" />
120 
121             <LinearLayout
122                 android:id="@+id/llDemoMainCutPictureActivity"
123                 style="@style/content_item_white" >
124 
125                 <TextView
126                     style="@style/content_item_lf_tv"
127                     android:layout_weight="1"
128                     android:text="CutPictureActivity" />
129 
130                 <ImageView style="@style/content_item_rt_img" />
131             </LinearLayout>
132 
133             <View style="@style/divider_horizontal_1px" />
134 
135             <LinearLayout
136                 android:id="@+id/llDemoMainWebViewActivity"
137                 style="@style/content_item_white" >
138 
139                 <TextView
140                     style="@style/content_item_lf_tv"
141                     android:layout_weight="1"
142                     android:text="WebViewActivity" />
143 
144                 <ImageView style="@style/content_item_rt_img" />
145             </LinearLayout>
146 
147             <View style="@style/divider_horizontal_1px" />
148 
149             <LinearLayout
150                 android:id="@+id/llDemoMainEditTextInfoActivity"
151                 style="@style/content_item_white" >
152 
153                 <TextView
154                     style="@style/content_item_lf_tv"
155                     android:layout_weight="1"
156                     android:text="EditTextInfoActivity" />
157 
158                 <ImageView style="@style/content_item_rt_img" />
159             </LinearLayout>
160 
161             <View style="@style/divider_horizontal_1px" />
162 
163             <LinearLayout
164                 android:id="@+id/llDemoMainServerSettingActivity"
165                 style="@style/content_item_white" >
166 
167                 <TextView
168                     style="@style/content_item_lf_tv"
169                     android:layout_weight="1"
170                     android:text="ServerSettingActivity" />
171 
172                 <ImageView style="@style/content_item_rt_img" />
173             </LinearLayout>
174 
175             <View
176                 style="@style/divider_horizontal_1px"
177                 android:layout_marginBottom="15dp" />
178 
179             <LinearLayout
180                 android:id="@+id/llDemoMainDemoActivity"
181                 style="@style/content_item_white" >
182 
183                 <TextView
184                     style="@style/content_item_lf_tv"
185                     android:layout_weight="1"
186                     android:text="DemoActivity" />
187 
188                 <ImageView style="@style/content_item_rt_img" />
189             </LinearLayout>
190 
191             <View style="@style/divider_horizontal_1px" />
192 
193             <LinearLayout
194                 android:id="@+id/llDemoMainDemoListActivity"
195                 style="@style/content_item_white" >
196 
197                 <TextView
198                     style="@style/content_item_lf_tv"
199                     android:layout_weight="1"
200                     android:text="DemoListActivity" />
201 
202                 <ImageView style="@style/content_item_rt_img" />
203             </LinearLayout>
204 
205             <View style="@style/divider_horizontal_1px" />
206 
207             <LinearLayout
208                 android:id="@+id/llDemoMainDemoFragmentActivity"
209                 style="@style/content_item_white" >
210 
211                 <TextView
212                     style="@style/content_item_lf_tv"
213                     android:layout_weight="1"
214                     android:text="DemoFragmentActivity" />
215 
216                 <ImageView style="@style/content_item_rt_img" />
217             </LinearLayout>
218 
219             <View style="@style/divider_horizontal_1px" />
220 
221             <LinearLayout
222                 android:id="@+id/llDemoMainDemoTabActivity"
223                 style="@style/content_item_white" >
224 
225                 <TextView
226                     style="@style/content_item_lf_tv"
227                     android:layout_weight="1"
228                     android:text="DemoTabActivity" />
229 
230                 <ImageView style="@style/content_item_rt_img" />
231             </LinearLayout>
232 
233             <View style="@style/divider_horizontal_1px" />
234 
235             <LinearLayout
236                 android:id="@+id/llDemoMainDemoTimeRefresherActivity"
237                 style="@style/content_item_white" >
238 
239                 <TextView
240                     style="@style/content_item_lf_tv"
241                     android:layout_weight="1"
242                     android:text="DemoTimeRefresherActivity" />
243 
244                 <ImageView style="@style/content_item_rt_img" />
245             </LinearLayout>
246 
247             <View style="@style/divider_horizontal_1px" />
248 
249             <LinearLayout
250                 android:id="@+id/llDemoMainDemoBroadcastReceiverActivity"
251                 style="@style/content_item_white" >
252 
253                 <TextView
254                     style="@style/content_item_lf_tv"
255                     android:layout_weight="1"
256                     android:text="DemoBroadcastReceiverActivity" />
257 
258                 <ImageView style="@style/content_item_rt_img" />
259             </LinearLayout>
260 
261             <View style="@style/divider_horizontal_1px" />
262 
263             <TextView
264                 style="@style/text_big"
265                 android:paddingBottom="6dp"
266                 android:paddingTop="30dp"
267                 android:text="Window" />
268 
269             <View style="@style/divider_horizontal_1px" />
270 
271             <LinearLayout
272                 android:id="@+id/llDemoMainTopMenuWindow"
273                 style="@style/content_item_white" >
274 
275                 <TextView
276                     style="@style/content_item_lf_tv"
277                     android:layout_weight="1"
278                     android:text="TopMenuWindow" />
279 
280                 <ImageView style="@style/content_item_rt_img" />
281             </LinearLayout>
282 
283             <View style="@style/divider_horizontal_1px" />
284 
285             <LinearLayout
286                 android:id="@+id/llDemoMainBottomMenuWindow"
287                 style="@style/content_item_white" >
288 
289                 <TextView
290                     style="@style/content_item_lf_tv"
291                     android:layout_weight="1"
292                     android:text="BottomMenuWindow" />
293 
294                 <ImageView style="@style/content_item_rt_img" />
295             </LinearLayout>
296 
297             <View style="@style/divider_horizontal_1px" />
298 
299             <LinearLayout
300                 android:id="@+id/llDemoMainEditTextInfoWindow"
301                 style="@style/content_item_white" >
302 
303                 <TextView
304                     style="@style/content_item_lf_tv"
305                     android:layout_weight="1"
306                     android:text="EditTextInfoWindow" />
307 
308                 <ImageView style="@style/content_item_rt_img" />
309             </LinearLayout>
310 
311             <View style="@style/divider_horizontal_1px" />
312 
313             <LinearLayout
314                 android:id="@+id/llDemoMainDatePickerWindow"
315                 style="@style/content_item_white" >
316 
317                 <TextView
318                     style="@style/content_item_lf_tv"
319                     android:layout_weight="1"
320                     android:text="DatePickerWindow" />
321 
322                 <ImageView style="@style/content_item_rt_img" />
323             </LinearLayout>
324 
325             <View style="@style/divider_horizontal_1px" />
326 
327             <LinearLayout
328                 android:id="@+id/llDemoMainPlacePickerWindow"
329                 style="@style/content_item_white" >
330 
331                 <TextView
332                     style="@style/content_item_lf_tv"
333                     android:layout_weight="1"
334                     android:text="PlacePickerWindow" />
335 
336                 <ImageView style="@style/content_item_rt_img" />
337             </LinearLayout>
338 
339             <View
340                 style="@style/divider_horizontal_1px"
341                 android:layout_marginBottom="30dp" />
342         </LinearLayout>
343     </ScrollView>
344 
345 </LinearLayout>