我们从事Android开发编写布局的时候大多数是使用XML来布局，这给我们带来了方便性，这样操作可以布局界面的代码和逻辑控制的Java代码分离出来，使程序的结构更加清晰、明了。特别的复杂的布局，但是这样操作也同样带来了另一些问题，例如屏幕的适应性，大多数Android开发人员都会遇到这个问题，还有一个就是内容问题，如果使用xml布局，Android的虚拟机首先解析xml布局，然后加载内存，如果布局越复杂，那加载的时间越慢，而用java代码布局，可以解决这些问题，不过比xml布局麻烦一点，而且必须运行才能看见结果。下面讲解一个开发过程中的一个例子:

下面是使用xml布局的代码:

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout
  3.   xmlns:android="http://schemas.android.com/apk/res/android"
  4.   android:layout_width="fill_parent"
  5.   android:layout_height="fill_parent"
  6.   android:background="@drawable/info_back">
  7.  
  8.      <LinearLayout
  9.         android:layout_width="wrap_content"
  10.         android:layout_height="wrap_content"
  11.         android:layout_above="@+id/linearRecordLayout">
  12.         <RelativeLayout
  13.              android:layout_width="wrap_content"
  14.              android:layout_height="fill_parent"
  15.              android:layout_marginLeft="15dp"
  16. 	         android:layout_marginRight="15dp">
  17.  
  18.              <!-- <LinearLayout
  19.                 android:id="@+id/LinearLayout_left"
  20.                 android:layout_width="wrap_content"
  21.                 android:layout_height="wrap_content"
  22.                 android:orientation="vertical"
  23.                 >  -->
  24.                 <LinearLayout
  25.                     android:id="@+id/contronLinearLayout"
  26.                     android:layout_width="wrap_content"
  27. 	                android:layout_height="wrap_content"
  28. 	                android:orientation="vertical"
  29. 	                android:layout_alignParentTop="true"
  30. 	                android:layout_marginLeft="20dp">
  31. 	                 <RelativeLayout
  32.                          android:layout_width="wrap_content"
  33. 	               		 android:layout_height="wrap_content"
  34. 	               		  android:orientation="horizontal"
  35.                         >
  36. 	                <TextView
  37. 			            android:id="@+id/temp_textview"
  38. 			            android:text="T:"
  39. 			            android:textSize="18sp"
  40. 			            android:layout_width="wrap_content"
  41. 			            android:layout_height="wrap_content"
  42. 			            android:textColor="#FFFFFF"
  43. 			            />
  44. 	                <ToggleButton
  45. 	                    android:id="@+id/temp_max"
  46. 	                    android:layout_width="15dp"
  47. 	                    android:layout_height="15dp"
  48. 	                    android:textOn=" "
  49. 		        	    android:textOff=" "
  50. 		        	    android:layout_toRightOf="@+id/temp_textview"
  51. 		        	    android:layout_alignParentTop="true"
  52. 		        	    android:layout_marginTop="5dp"
  53. 		        	    android:background="@drawable/max"
  54. 		        	    android:visibility="invisible"
  55. 	                    />
  56. 	                </RelativeLayout>
  57. 			        <TextView
  58. 			            android:id="@+id/humidity_textiew"
  59. 			            android:text="H:"
  60. 			            android:textSize="18sp"
  61. 			            android:layout_width="wrap_content"
  62. 			            android:layout_height="wrap_content"
  63. 			            android:textColor="#FFFFFF"
  64. 			            android:layout_marginTop="5dp"/>
  65.                 </LinearLayout>
  66.                 <LinearLayout
  67.                     android:id="@+id/BtnControl"
  68.                     android:layout_width="150dp"
  69. 	                android:layout_height="150dp"
  70. 	                android:orientation="vertical"
  71. 	           		android:layout_marginTop="20dp"
  72. 	           		android:layout_alignParentBottom="true"
  73. 	           		android:layout_marginBottom="35dp"
  74. 	                android:gravity="center_vertical|center_horizontal"
  75. 	                android:background="@drawable/no_control">
  76.                      <Button
  77. 	                    android:id="@+id/up"
  78. 	                    android:layout_width="50dp"
  79. 	                    android:layout_height="60dp"
  80. 	                     android:background="@drawable/kong"/>
  81. 	                <LinearLayout
  82. 	                    android:layout_width="wrap_content"
  83. 		                android:layout_height="wrap_content"
  84. 		                android:orientation="horizontal">
  85. 	                    <Button
  86. 		                    android:id="@+id/left"
  87. 		                    android:layout_width="80dp"
  88. 		                    android:layout_height="50dp"
  89. 		                    android:background="@drawable/kong"/>
  90. 	                     <Button
  91. 		                    android:id="@+id/right"
  92. 		                    android:layout_width="80dp"
  93. 		                    android:layout_height="50dp"
  94. 		                    android:layout_marginLeft="10dp"
  95. 		                     android:background="@drawable/kong"
  96. 		                    />
  97. 	                </LinearLayout>
  98. 	                <Button
  99. 	                    android:id="@+id/down"
  100. 	                    android:layout_width="50dp"
  101. 	                    android:layout_height="60dp"
  102. 	                     android:background="@drawable/kong"
  103. 	                    />
  104.                 </LinearLayout>
  105.  
  106.           <!--  </LinearLayout>  -->
  107.             <LinearLayout
  108.                 android:layout_width="wrap_content"
  109.                 android:layout_height="wrap_content"
  110.                 android:orientation="horizontal"
  111.                 android:layout_alignParentBottom="true"
  112. 	            android:layout_marginBottom="5dp"
  113. 	            android:layout_alignParentLeft="true"
  114. 	            android:layout_marginLeft="0dp">
  115.                 <Button
  116. 	                android:id="@+id/about_button"
  117. 	                android:layout_width="27dp"
  118. 	                android:layout_height="27dp"
  119. 	                android:background="@drawable/info_off"
  120. 	                android:layout_marginRight="10dp"
  121. 	                />
  122.                  <Button
  123.                      android:id="@+id/webserver"
  124.                      android:layout_width="27dp"
  125. 	                android:layout_height="27dp"
  126. 	                android:layout_marginRight="10dp"
  127. 	                 android:background="@drawable/net_in_off"
  128.                      />
  129.                 <Button
  130.                     android:id="@+id/apConvertButton"
  131.                     android:layout_width="27dp"
  132. 	                android:layout_height="27dp"
  133. 	                android:background="@drawable/wifi_switch_off"
  134.                      />
  135.             </LinearLayout>
  136.  
  137.         </RelativeLayout>
  138.         <RelativeLayout
  139.              android:id="@+id/camerSurfaceRelativelayout"
  140.              android:layout_width="wrap_content"
  141. 	         android:layout_height="wrap_content">
  142.             <LinearLayout
  143. 		    	android:layout_width="wrap_content"
  144. 		    	android:id="@+id/controlAbsoluteLayout"
  145. 		    	android:layout_height="fill_parent"
  146. 		    	android:gravity="center_vertical|center_horizontal">
  147.  
  148. 	        	<com.pcareroute.surface.CameraSurfaceView
  149. 		            android:id="@+id/car_camera_surfaceview"
  150. 		            android:layout_width="wrap_content"
  151. 		            android:layout_height="fill_parent" />
  152. 	    	</LinearLayout>
  153. 	        <RelativeLayout
  154. 		        android:id="@+id/scale_control_linearLayout"
  155. 		        android:layout_width="wrap_content"
  156. 		        android:layout_height="wrap_content"
  157. 		        android:layout_alignParentTop="true"
  158. 		        android:padding="5dip" >
  159.  
  160. 		        <Button
  161. 		            android:id="@+id/zoom_in_button"
  162. 		            android:layout_width="40dp"
  163. 		            android:layout_height="40dp"
  164. 		            android:layout_marginLeft="3dp"
  165. 		             android:layout_marginTop="3dp"
  166. 		            android:background="@drawable/button_zoom_out_icon" >
  167. 		        </Button>
  168. 			        <LinearLayout
  169. 			             android:layout_width="wrap_content"
  170. 			        	 android:layout_height="wrap_content"
  171. 			        	 android:layout_alignParentRight="true"
  172. 			             android:layout_marginRight="60dp"
  173. 			             android:layout_marginTop="3dp"
  174. 			        	 >
  175. 				        <ToggleButton
  176. 				             android:textOn=" "
  177. 		        	         android:textOff=" "
  178. 				             android:id="@+id/record_red"
  179. 				             android:layout_width="18dp"
  180. 				             android:layout_height="18dp"
  181. 				             android:background="@drawable/video_off_led"
  182. 				             android:visibility="invisible"/>
  183. 				       <Chronometer
  184. 		                    android:id="@+id/chronometer1"
  185. 		                    android:layout_width="wrap_content"
  186. 		                    android:layout_height="wrap_content"
  187. 		                     android:layout_marginLeft="7dp"
  188. 		                    android:text="Chronometer"
  189. 				            android:visibility="invisible"
  190. 		                    />
  191. 			       </LinearLayout>
  192. 		        <Button
  193. 		            android:layout_alignParentRight="true"
  194. 		            android:id="@+id/zoom_out_button"
  195. 		            android:layout_width="40dp"
  196. 		            android:layout_height="40dp"
  197. 		            android:layout_marginRight="2dp"
  198. 		            android:layout_marginTop="3dp"
  199. 		            android:background="@drawable/button_zoom_in_icon"></Button>
  200.  
  201. 		    </RelativeLayout>
  202.             <LinearLayout
  203. 	            android:id="@+id/RelativeLayoutzoom"
  204. 	            android:layout_width="wrap_content"
  205. 			    android:layout_height="wrap_content"
  206. 			    android:gravity="center_vertical|center_horizontal"
  207. 			    android:layout_centerHorizontal="true"
  208. 			    android:layout_above="@+id/bottomEmpty"
  209. 			    >
  210. 				<TextView
  211. 			         android:id="@+id/scale_textView"
  212. 			         android:layout_width="wrap_content"
  213. 			         android:layout_height="wrap_content"
  214. 			         android:gravity="center_horizontal"
  215. 			         android:shadowColor="#ff000000"
  216. 			         android:shadowDx="2"
  217. 			         android:shadowDy="0"
  218. 			         android:shadowRadius="2"
  219. 			         android:text="100%"
  220. 			         android:textAppearance="?android:attr/textAppearanceMedium"
  221. 			         android:textStyle="bold" />
  222.             </LinearLayout>
  223.             <LinearLayout
  224.                 android:id="@+id/bottomEmpty"
  225.                 android:layout_width="fill_parent"
  226. 			    android:layout_height="18dp"
  227. 			    android:layout_alignParentBottom="true">
  228.             </LinearLayout>
  229.         </RelativeLayout>
  230.  
  231.     </LinearLayout> 
  232.  
  233.      <!-- <RelativeLayout
  234.         android:id="@+id/scale_control_linearLayout"
  235.         android:layout_width="fill_parent"
  236.         android:layout_height="wrap_content"
  237.         android:layout_alignParentTop="true"
  238.         android:padding="5dip" >
  239.  
  240.         <Button
  241.             android:id="@+id/zoom_in_button"
  242.             android:layout_width="40dp"
  243.             android:layout_height="40dp"
  244.             android:layout_marginLeft="25dp"
  245.             android:background="@drawable/button_zoom_out_icon" >
  246.         </Button>
  247.         <Button
  248.             android:layout_alignParentRight="true"
  249.             android:id="@+id/zoom_out_button"
  250.             android:layout_width="40dp"
  251.             android:layout_height="40dp"
  252.             android:layout_marginRight="25dp"
  253.             android:background="@drawable/button_zoom_in_icon" >
  254.         </Button>
  255.  		<LinearLayout
  256. 	       android:id="@+id/linearlayout_temp_rh"
  257. 	        android:layout_width="wrap_content"
  258. 	        android:layout_height="wrap_content"
  259. 	        android:layout_centerHorizontal="true"
  260. 	        android:layout_above="@+id/linearRecordLayout"
  261.        		android:layout_centerVertical="true"
  262.         >
  263.  
  264.         <TextView
  265.             android:id="@+id/temp_textview"
  266.             android:text="T"
  267.             android:layout_width="wrap_content"
  268.             android:layout_height="wrap_content"
  269.             android:textColor="#FFFFFF"
  270.             android:shadowColor="#ff000000"
  271.             android:shadowDx="2"
  272.             android:shadowDy="0"
  273.             android:shadowRadius="2"
  274.             />
  275.  
  276.         <TextView
  277.             android:id="@+id/humidity_textiew"
  278.             android:text="H"
  279.             android:layout_width="wrap_content"
  280.             android:layout_height="wrap_content"
  281.             android:textColor="#FFFFFF"
  282.             android:layout_marginLeft="100dp"
  283.             android:shadowColor="#ff000000"
  284.             android:shadowDx="2"
  285.             android:shadowDy="0"
  286.             android:shadowRadius="2"
  287.             />
  288.     </LinearLayout>
  289.  
  290.              <LinearLayout
  291.             android:id="@+id/RelativeLayoutpower"
  292.             android:layout_width="wrap_content"
  293. 		    android:layout_height="wrap_content"
  294. 		    android:layout_above="@+id/linearbuttonLayout"
  295. 		    android:layout_centerHorizontal="true"
  296. 		    android:gravity="center_vertical|center_horizontal"
  297. 		    android:layout_centerVertical="true"
  298. 		    android:layout_toRightOf="@+id/RelativeLayoutzoom"
  299. 	    >
  300.         </LinearLayout>
  301.  
  302.     </RelativeLayout> -->
  303.    <!-- <LinearLayout
  304.     	android:orientation="vertical"
  305.     	android:id="@+id/linearControlLayout"
  306.     	android:visibility="visible"
  307.     	android:layout_alignParentRight="true"
  308.     	android:layout_marginRight="10dp"
  309.     	android:layout_width="50dip"
  310.     	android:layout_height="fill_parent"
  311.     	android:gravity="center_vertical|center_horizontal"
  312.     	>
  313.  
  314.          <com.wificar.surface.DoubleAxisRightControllerSurfaceView
  315.              android:layout_gravity="center_vertical"
  316. 	    	android:clickable="false"
  317. 	    	android:layout_height="180dp"
  318. 	    	android:id="@+id/stick_double_axis_right_controller_surfaceview"
  319. 	    	android:layout_width="wrap_content"></com.wificar.surface.DoubleAxisRightControllerSurfaceView>
  320.  
  321.     </LinearLayout>
  322.      <LinearLayout  
  323.  
  324.       	android:id="@+id/function_linearLayout"
  325.         android:orientation="vertical"
  326.         android:layout_width="50dip"
  327.         android:layout_alignParentLeft="true"
  328.         android:layout_marginLeft="10dp"
  329.         android:layout_height="fill_parent"
  330.         android:gravity="center_vertical|center_horizontal">
  331.  
  332.     	 <com.wificar.surface.DoubleAxisLeftControllerSurfaceView
  333.     	    android:layout_gravity="center_vertical"
  334.         	android:clickable="true"
  335.         	android:layout_height="180dp"
  336.         	android:id="@+id/stick_double_axis_left_controller_surfaceview"
  337.         	android:layout_width="wrap_content"></com.wificar.surface.DoubleAxisLeftControllerSurfaceView>
  338.  
  339.     </LinearLayout>  -->
  340.  
  341.    <!--  <RelativeLayout
  342.         android:id="@+id/relativelayout_temp_rh"
  343.         android:layout_width="fill_parent"
  344.         android:layout_height="80dp"
  345.         android:layout_alignParentBottom="true"
  346.          > -->
  347.     <LinearLayout
  348.     	android:background="@drawable/button_bar"
  349.     	android:gravity="center_vertical|center_horizontal"
  350.     	android:layout_width="fill_parent"
  351.     	android:layout_height="45dp"
  352.     	android:id="@+id/linearRecordLayout"
  353.     	android:layout_alignParentBottom="true">
  354.     	 <ToggleButton
  355.                android:id="@+id/send_voice_button"
  356. 	           android:layout_width="40dp"
  357. 	           android:layout_height="40dp"
  358. 	           android:textOn=""
  359. 	           android:textOff=""
  360. 	           android:background="@drawable/talk_off"
  361. 	           android:layout_marginRight="23dip" />
  362.     	 <Button
  363.               android:id="@+id/spk_toggle_button"
  364.               android:layout_width="40dp"
  365.               android:layout_height="40dp"
  366.               android:textOn=" "
  367.               android:textOff=" "
  368.               android:background="@drawable/music_off"
  369.               android:layout_marginRight="23dp"
  370.              />
  371.     	 <ToggleButton
  372.     		android:textOn=" "
  373.         	android:textOff=" "
  374.         	android:layout_marginRight="23dp"
  375.     		android:layout_width="40dp"
  376.     		android:layout_height="40dp"
  377.     		android:background="@drawable/video_off"
  378.     		android:id="@+id/camera_shoot_button"
  379.     		/>
  380.     	<ToggleButton
  381.         	android:background="@drawable/sound_mute"
  382.         	android:id="@+id/listen_toggle_button"
  383.         	android:layout_width="40dp"
  384.         	android:textOn=" "
  385.         	android:textOff=" "
  386.         	android:layout_height="40dp"
  387.         	android:layout_marginRight="23dp" ></ToggleButton>
  388.     	 <Button
  389.            android:id="@+id/take_picture_button"
  390.            android:layout_width="40dp"
  391.            android:layout_height="40dp"
  392.            android:layout_marginRight="23dp"
  393.            android:background="@drawable/button_take_photo_icon" />
  394.     	<ToggleButton
  395.         	android:background="@drawable/ir_off"
  396.         	android:id="@+id/light_toggle_button"
  397.         	android:layout_width="40dp"
  398.         	android:layout_height="40dp"
  399.         	 android:layout_marginRight="23dp"
  400.         	android:textOn=" "
  401.         	android:textOff=" " ></ToggleButton>
  402.     	<Button
  403.     	    android:background="@drawable/share_off"
  404.     	    android:id="@+id/shared"
  405.     	    android:layout_width="40dp"
  406.         	android:layout_height="40dp"
  407.     	    />
  408.    	</LinearLayout>
  409.  
  410.  <!-- </RelativeLayout> -->
  411.  
  412. </RelativeLayout>

直接在Eclipse里面查看的显示效果如下:

在真机上运行效果如下:

进行对比，真机是我们想要的结果，但是之前的编写的效果不对，而且对于不同的屏幕分辨率xml布局编写了三个xml布局来实现适应性。

下面使用java代码来实现布局，使用两个文件一个布局文件，另一个是布局参数文件

布局文件代码如下:

  1. package com.pcareroute;
  2.  
  3. import com.seuic.pcareroute.AppLog;
  4. import com.seuic.pcareroute.surface.CameraSurface;
  5. import com.seuic.pcareroute.util.PcareRouteParams;
  6. import com.seuic.pcareroute.util.ToolsUnility;
  7.  
  8. import android.app.Activity;
  9. import android.os.Bundle;
  10. import android.widget.Button;
  11. import android.widget.LinearLayout;
  12. import android.widget.RelativeLayout;
  13. import android.widget.TextView;
  14. import android.widget.ToggleButton;
  15.  
  16. public class PcareRouteMain extends Activity{
  17. 	public static final String TAG = "PcareRouteMain";
  18. 	public PcareRouteMain instance;
  19. 	PcareRouteParams pRouteParams;
  20. 	@Override
  21. 	protected void onCreate(Bundle savedInstanceState) {
  22. 		super.onCreate(savedInstanceState);
  23. 		ToolsUnility.getToolsUnilityInstance(this).noTitleAndStaBar(this); //去掉标题栏和状态栏
  24. 		instance = this;
  25. 		pRouteParams = new PcareRouteParams(instance);
  26. 		AppLog.enableLogging(true);
  27. 		initLayout();
  28. 	}
  29.  
  30. 	//初始化布局和组件
  31. 	public void initLayout(){
  32. 		Parent = new RelativeLayout(getApplicationContext());
  33. 		Parent.setBackgroundResource(R.drawable.info_back);
  34. 		BottomInParent = new LinearLayout(getApplicationContext());
  35. 		BottomInParent.setId(_R.id.bottom_in_parent);
  36. 		BottomInParent.setBackgroundResource(R.drawable.button_bar);
  37. 		ButtonInBottom = new ToggleButton[pRouteParams.Bottom_Button_Number];
  38. 		for (int i = 0; i < pRouteParams.Bottom_Button_Number; i++) {
  39. 			ButtonInBottom[i] = new ToggleButton(getApplicationContext());
  40. 			ButtonInBottom[i].setBackgroundResource(ButtonInBottomImage[i]);
  41. 			ButtonInBottom[i].setTextOff(" ");
  42. 			ButtonInBottom[i].setTextOn(" ");
  43. 			ButtonInBottom[i].setText(" ");
  44. 			BottomInParent.addView(ButtonInBottom[i], pRouteParams.buttonInBottomParams);
  45. 		}
  46. 		Parent.addView(BottomInParent, pRouteParams.bottomInParentParams);
  47.  
  48. 		LeftInParent = new RelativeLayout(getApplicationContext());
  49. 		LeftInParent.setId(_R.id.left_in_parent);
  50. 		BottomInLeft = new LinearLayout(getApplicationContext());
  51. 		BottomInLeft.setId(_R.id.bottom_in_left);
  52. 		ButtonInLeft = new Button[pRouteParams.Left_Bottom_Button_Number];
  53. 		for (int i = 0; i < pRouteParams.Left_Bottom_Button_Number; i++) {
  54. 			ButtonInLeft[i] = new Button(getApplicationContext());
  55. 			ButtonInLeft[i].setText(" ");
  56. 			ButtonInLeft[i].setBackgroundResource(ButtonInLeftImage[i]);
  57. 			BottomInLeft.addView(ButtonInLeft[i], pRouteParams.Left_Bottom_Button_Params);
  58. 		}
  59. 		LeftInParent.addView(BottomInLeft, pRouteParams.bottomInLeftParams);
  60.  
  61. 		tempView = new TextView(getApplicationContext());
  62. 		tempView.setTextSize(pRouteParams.Left_Top_Temp_TextSize);
  63. 		tempView.setText("T:");
  64. 		tempView.setId(_R.id.tempview_in_left);
  65. 		LeftInParent.addView(tempView, pRouteParams.Left_Top_Temp_Params);
  66. 		tempRoll = new ToggleButton(getApplicationContext());
  67. 		tempRoll.setBackgroundResource(R.drawable.max);
  68. 		tempRoll.setText(" ");
  69. 		tempRoll.setTextOff(" ");
  70. 		tempRoll.setTextOn(" ");
  71. //		tempRoll.setVisibility(View.INVISIBLE);
  72. 		LeftInParent.addView(tempRoll, pRouteParams.Left_Top_Temp_ToggButton_Params);
  73.  
  74. 		humidityView = new TextView(getApplicationContext());
  75. 		humidityView.setText("H:");
  76. 		humidityView.setId(_R.id.humiview_in_left);
  77. 		humidityView.setTextSize(pRouteParams.Left_Top_Temp_TextSize);
  78. 		LeftInParent.addView(humidityView, pRouteParams.Left_Top_Humi_Params);
  79.  
  80. 		CenterInLeft = new RelativeLayout(getApplicationContext());
  81. 		ControlBtn = new Button[CtrolBtnNumber];
  82. 		for (int i = 0; i < CtrolBtnNumber; i++) {
  83. 			ControlBtn[i] = new Button(getApplicationContext());
  84. 			ControlBtn[i].setBackgroundResource(Btn_Ctrol_In_Left_Image[i]);
  85. 			CenterInLeft.addView(ControlBtn[i], pRouteParams.Left_Center_CtrolButtons_Params[i]);
  86. 		}
  87. 		LeftInParent.addView(CenterInLeft, pRouteParams.Left_Center_CtrolButton_Params);
  88. 		Parent.addView(LeftInParent, pRouteParams.leftInParentParams);
  89.  
  90. 		RightInParent = new RelativeLayout(getApplicationContext());
  91. 		cameraSurface = new CameraSurface(getApplicationContext());
  92. 		RightInParent.addView(cameraSurface, pRouteParams.Right_Surface_Params);
  93. 		ScaleBtn = new Button[ScaleBtnNumber];
  94. 		for (int i = 0; i < ScaleBtnNumber; i++) {
  95. 			ScaleBtn[i] = new Button(getApplicationContext());
  96. 			ScaleBtn[i].setBackgroundResource(Btn_Scale_In_Right_Image[i]);
  97. 			RightInParent.addView(ScaleBtn[i], pRouteParams.Right_Scale_Button_Params[i]);
  98. 		}
  99. 		scaleView = new TextView(getApplicationContext());
  100. 		scaleView.setText("100%");
  101. 		scaleView.getPaint().setFakeBoldText(true);//加粗
  102. 		scaleView.setTextSize(20);
  103. 		RightInParent.addView(scaleView, pRouteParams.Right_Scale_View_Params);
  104. 		Parent.addView(RightInParent, pRouteParams.RightInParentParams);
  105.  
  106. 		setContentView(Parent, pRouteParams.paramentParams);
  107. 	}
  108.  
  109. 	//声明组件和布局
  110. 	public RelativeLayout	Parent;
  111. 	public LinearLayout		BottomInParent;
  112. 	public RelativeLayout	LeftInParent;
  113. 	public LinearLayout		BottomInLeft;
  114. 	public RelativeLayout	CenterInLeft;
  115. 	public RelativeLayout	RightInParent;
  116. 	public CameraSurface	cameraSurface;
  117. 	public ToggleButton[]	ButtonInBottom;
  118. 	public Button[] ButtonInLeft;
  119. 	public Button[] ControlBtn;
  120. 	public Button[] ScaleBtn;
  121. 	public TextView tempView, humidityView;
  122. 	public TextView scaleView;
  123. 	public ToggleButton tempRoll;
  124. 	//声明变量
  125. 	public int[] ButtonInBottomImage = {R.drawable.talk_off, R.drawable.music_off, R.drawable.video_off, R.drawable.sound_mute, R.drawable.button_take_photo_icon, R.drawable.ir_off, R.drawable.share_off};//存储底部button的图片的数组
  126. 	public int[] ButtonInLeftImage = {R.drawable.info_off, R.drawable.net_in_off, R.drawable.wifi_switch_off};//左边布局的下面三个Button按钮图片
  127. 	public int[] Btn_Ctrol_In_Left_Image = {R.drawable.left_off, R.drawable.up_off, R.drawable.right_off, R.drawable.down_off};
  128. 	public int CtrolBtnNumber = 4;
  129. 	public int[] Btn_Scale_In_Right_Image = {R.drawable.zoom_out, R.drawable.zoom_in};
  130. 	public int ScaleBtnNumber = 2;
  131. }

在上面的代码中如果我们有多个相同的按钮，则可以使用数组来存储，这样做的好处就是代码更加清晰，而且能够减少冗余代码

  1. ControlBtn = new Button[CtrolBtnNumber];
  2. 		for (int i = 0; i < CtrolBtnNumber; i++) {
  3. 			ControlBtn[i] = new Button(getApplicationContext());
  4. 			ControlBtn[i].setBackgroundResource(Btn_Ctrol_In_Left_Image[i]);
  5. 			CenterInLeft.addView(ControlBtn[i], pRouteParams.Left_Center_CtrolButtons_Params[i]);
  6. 		}

这样的代码，如果我们用平时的一个组件一个名称，就比现在多余 CtrolBtnNumber倍的代码冗余。

布局参数代码如下：

  1. package com.seuic.pcareroute.util;
  2.  
  3. import com.pcareroute._R;
  4.  
  5. import android.app.Activity;
  6. import android.util.DisplayMetrics;
  7. import android.view.Gravity;
  8. import android.widget.LinearLayout;
  9. import android.widget.RelativeLayout;
  10.  
  11. public class PcareRouteParams {
  12. 	public static final String TAG = "PcareRouteParams";
  13. 	Activity activity;
  14. 	public PcareRouteParams(Activity activity){
  15. 		this.activity = activity;
  16. 		getDisplayMetrics();
  17. 		initVar();
  18. 		initLayoutParams();
  19. 	}
  20. 	//初始化變量
  21. 	public void initVar(){
  22. 		if (screenSize > 5.8) {
  23. 			Bottom_Button_Width = dip2px(60);
  24. 			Left_Bottom_Button_Width = dip2px(35);
  25. 			Bottom_Back_Height = dip2px(70);
  26. 			Left_Top_TopMarge = dip2px(20);
  27. 			Left_Top_Temp_LeftMarge = dip2px(40);
  28. 			Left_Top_Temp_TextSize = 35;
  29. 			Left_Top_Temp_ToggButton_Width = dip2px(28);
  30. 			Left_Top_Temp_ToggButton_Height = dip2px(30);
  31. 			Left_Top_Temp_ToggButton_TopMarge = dip2px(20);
  32. 			Left_Top_Humi_View_TopMarge = dip2px(5);
  33. 			Left_Center_CtrolButton_Width = dip2px(300);
  34. 			Left_Center_CtrolButton_Height = dip2px(250);
  35. 			Left_Center_CtrolButton_LeftMarge = dip2px(20);
  36. 			Left_Center_CtrolButton_BottomMarge = dip2px(20);
  37. 			Right_Surface_LeftMarge = Left_Center_CtrolButton_LeftMarge;
  38. 			Left_Center_CtrolButton_LeftBtn_Width = dip2px(135);
  39. 			Left_Center_CtrolButton_LeftBtn_Height = dip2px(90);
  40. 			Left_Center_CtrolButton_UpBtn_Width = dip2px(100);
  41. 			Left_Center_CtrolButton_UpBtn_Height = dip2px(135);
  42. 			Right_Scale_Button_Width = dip2px(50);
  43. 			Right_Scale_Button_Marge = dip2px(7);
  44. 			Right_Scale_View_BottomMarge = dip2px(40);
  45. 		}else if(screenSize < 3.8){
  46. 			Bottom_Button_Width = dip2px(35);
  47. 			Left_Bottom_Button_Width = dip2px(18);
  48. 			Bottom_Back_Height = dip2px(35);
  49. 			Left_Top_TopMarge = dip2px(0);
  50. 			Left_Top_Temp_LeftMarge = dip2px(10);
  51. 			Left_Top_Temp_TextSize = 18;
  52. 			Left_Top_Temp_ToggButton_Width = dip2px(15);
  53. 			Left_Top_Temp_ToggButton_Height = dip2px(15);
  54. 			Left_Top_Temp_ToggButton_TopMarge = dip2px(5);
  55. 			Left_Top_Humi_View_TopMarge = dip2px(3);
  56. 			Left_Center_CtrolButton_Width = dip2px(120);
  57. 			Left_Center_CtrolButton_Height = dip2px(120);
  58. 			Left_Center_CtrolButton_LeftMarge = dip2px(20);
  59. 			Left_Center_CtrolButton_BottomMarge = dip2px(5);
  60. 			Right_Surface_LeftMarge = Left_Center_CtrolButton_LeftMarge;
  61. 			Left_Center_CtrolButton_LeftBtn_Width = dip2px(40);
  62. 			Left_Center_CtrolButton_LeftBtn_Height = dip2px(30);
  63. 			Left_Center_CtrolButton_UpBtn_Width = dip2px(30);
  64. 			Left_Center_CtrolButton_UpBtn_Height = dip2px(40);
  65. 			Right_Scale_Button_Width = dip2px(30);
  66. 			Right_Scale_Button_Marge = dip2px(3);
  67. 			Right_Scale_View_BottomMarge = dip2px(15);
  68. 		}else {
  69. 			Bottom_Button_Width = dip2px(40);
  70. 			Left_Bottom_Button_Width = dip2px(27);
  71. 			Bottom_Back_Height = dip2px(45);
  72. 			Left_Top_TopMarge = dip2px(0);
  73. 			Left_Top_Temp_LeftMarge = dip2px(20);
  74. 			Left_Top_Temp_TextSize = 18;
  75. 			Left_Top_Temp_ToggButton_Width = dip2px(15);
  76. 			Left_Top_Temp_ToggButton_Height = dip2px(15);
  77. 			Left_Top_Temp_ToggButton_TopMarge = dip2px(5);
  78. 			Left_Top_Humi_View_TopMarge = dip2px(5);
  79. 			Left_Center_CtrolButton_Width = dip2px(150);
  80. 			Left_Center_CtrolButton_Height = dip2px(150);
  81. 			Left_Center_CtrolButton_LeftMarge = dip2px(20);
  82. 			Left_Center_CtrolButton_BottomMarge = dip2px(10);
  83. 			Right_Surface_LeftMarge = Left_Center_CtrolButton_LeftMarge;
  84. 			Left_Center_CtrolButton_LeftBtn_Width = dip2px(80);
  85. 			Left_Center_CtrolButton_LeftBtn_Height = dip2px(50);
  86. 			Left_Center_CtrolButton_UpBtn_Width = dip2px(50);
  87. 			Left_Center_CtrolButton_UpBtn_Height = dip2px(60);
  88. 			Right_Scale_Button_Width = dip2px(40);
  89. 			Right_Scale_Button_Marge = dip2px(3);
  90. 			Right_Scale_View_BottomMarge = dip2px(18);
  91. 		}
  92. 		Left_Bottom_Button_LeftMarge = dip2px(10);
  93. 		BottomInLeft_BottomMarge = dip2px(5);
  94. 	}
  95. 	public int dip2px(float dpValue) {
  96.         return (int)(dpValue * scale + 0.5f);
  97.     }
  98. 	//获取屏幕的宽度，高度和密度以及dp / px
  99. 	 public void getDisplayMetrics() {
  100.   		DisplayMetrics dm = new DisplayMetrics();
  101.   		dm = activity.getApplicationContext().getResources().getDisplayMetrics();
  102.   		Screen_width = dm.widthPixels;
  103.   		Screen_height = dm.heightPixels;
  104.   		scale = activity.getResources().getDisplayMetrics().density;
  105.   		density = dm.density;
  106.   		double bb = Math.sqrt(Math.pow(Screen_width, 2)+ Math.pow(Screen_height, 2));
  107.   		screenSize = bb / (160 * dm.density);
  108. 	}
  109.  
  110. 	//初始化布局参数
  111. 	public void initLayoutParams(){
  112. 		paramentParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
  113. 		bottomInParentParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, Bottom_Back_Height);
  114. 		bottomInParentParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
  115. 		buttonInBottomParams = new LinearLayout.LayoutParams(Bottom_Button_Width, Bottom_Button_Width);
  116. 		buttonInBottomParams.gravity = Gravity.CENTER_VERTICAL;
  117. 		//底部包含组件布局参数
  118. 		int jiange = (Screen_width - Bottom_Button_Width * Bottom_Button_Number)/(Bottom_Button_Number + 1);
  119. 		buttonInBottomParams.leftMargin = jiange;
  120.  
  121. 		leftInParentParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.MATCH_PARENT);
  122. 		leftInParentParams.addRule(RelativeLayout.ABOVE, _R.id.bottom_in_parent);
  123. 		bottomInLeftParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
  124. 		bottomInLeftParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
  125. 		bottomInLeftParams.bottomMargin = BottomInLeft_BottomMarge;
  126.  
  127. 		Left_Bottom_Button_Params = new LinearLayout.LayoutParams(Left_Bottom_Button_Width, Left_Bottom_Button_Width);
  128. 		Left_Bottom_Button_Params.leftMargin = Left_Bottom_Button_LeftMarge;
  129. 		Left_Bottom_Button_Params.gravity = Gravity.CENTER_VERTICAL;
  130.  
  131. 		Left_Top_Temp_Params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
  132. 		Left_Top_Temp_Params.topMargin = Left_Top_TopMarge;
  133. 		Left_Top_Temp_Params.leftMargin = Left_Top_Temp_LeftMarge;
  134. 		Left_Top_Temp_ToggButton_Params = new RelativeLayout.LayoutParams(Left_Top_Temp_ToggButton_Width, Left_Top_Temp_ToggButton_Height);
  135. 		Left_Top_Temp_ToggButton_Params.addRule(RelativeLayout.RIGHT_OF, _R.id.tempview_in_left);
  136. 		Left_Top_Temp_ToggButton_Params.topMargin = Left_Top_Temp_ToggButton_TopMarge;
  137.  
  138. 		Left_Top_Humi_Params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
  139. 		Left_Top_Humi_Params.addRule(RelativeLayout.BELOW, _R.id.tempview_in_left);
  140. 		Left_Top_Humi_Params.topMargin = Left_Top_Humi_View_TopMarge;
  141. 		Left_Top_Humi_Params.addRule(RelativeLayout.ALIGN_LEFT, _R.id.tempview_in_left);
  142.  
  143. 		Left_Center_CtrolButton_Params = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_Width, Left_Center_CtrolButton_Height);
  144. 		Left_Center_CtrolButton_Params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
  145. 		Left_Center_CtrolButton_Params.bottomMargin = BottomInLeft_BottomMarge + Left_Center_CtrolButton_BottomMarge + Left_Bottom_Button_Width;
  146. 		Left_Center_CtrolButton_Params.leftMargin = Left_Center_CtrolButton_LeftMarge;
  147. //		Left_Center_CtrolButton_Params.rightMargin = Left_Center_CtrolButton_LeftMarge;
  148. 		Left_Center_CtrolButtons_Params = new RelativeLayout.LayoutParams[4];
  149. 		Left_Center_CtrolButtons_Params[0] = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_UpBtn_Height, Left_Center_CtrolButton_UpBtn_Width);
  150. 		Left_Center_CtrolButtons_Params[0].addRule(RelativeLayout.CENTER_VERTICAL);
  151. 		Left_Center_CtrolButtons_Params[1] = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_UpBtn_Width, Left_Center_CtrolButton_UpBtn_Height);
  152. 		Left_Center_CtrolButtons_Params[1].addRule(RelativeLayout.CENTER_HORIZONTAL);
  153. 		Left_Center_CtrolButtons_Params[2] = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_UpBtn_Height, Left_Center_CtrolButton_UpBtn_Width);
  154. 		Left_Center_CtrolButtons_Params[2].addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
  155. 		Left_Center_CtrolButtons_Params[2].addRule(RelativeLayout.CENTER_VERTICAL);
  156. 		Left_Center_CtrolButtons_Params[3] = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_UpBtn_Width, Left_Center_CtrolButton_UpBtn_Height);
  157. 		Left_Center_CtrolButtons_Params[3].addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
  158. 		Left_Center_CtrolButtons_Params[3].addRule(RelativeLayout.CENTER_HORIZONTAL);
  159.  
  160. 		RightInParentParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
  161. 		RightInParentParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
  162. 		RightInParentParams.addRule(RelativeLayout.RIGHT_OF, _R.id.left_in_parent);
  163. 		RightInParentParams.addRule(RelativeLayout.ABOVE, _R.id.bottom_in_parent);
  164. 		RightInParentParams.leftMargin = Right_Surface_LeftMarge;
  165. 		Right_Surface_Params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
  166.  
  167. 		Right_Scale_Button_Params = new RelativeLayout.LayoutParams[2];
  168. 		Right_Scale_Button_Params[0] = new RelativeLayout.LayoutParams(Right_Scale_Button_Width, Right_Scale_Button_Width);
  169. 		Right_Scale_Button_Params[0].leftMargin = Right_Scale_Button_Marge;
  170. 		Right_Scale_Button_Params[0].topMargin = Right_Scale_Button_Marge;
  171. 		Right_Scale_Button_Params[1] = new RelativeLayout.LayoutParams(Right_Scale_Button_Width, Right_Scale_Button_Width);
  172. 		Right_Scale_Button_Params[1].addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
  173. 		Right_Scale_Button_Params[1].rightMargin = Right_Scale_Button_Marge;
  174. 		Right_Scale_Button_Params[1].topMargin = Right_Scale_Button_Marge;
  175. 		Right_Scale_View_Params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
  176. 		Right_Scale_View_Params.addRule(RelativeLayout.CENTER_HORIZONTAL);
  177. 		Right_Scale_View_Params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
  178. 		Right_Scale_View_Params.bottomMargin = Right_Scale_View_BottomMarge;
  179. 	}
  180.  
  181. 	//声明布局和组件
  182. 	public RelativeLayout.LayoutParams paramentParams;
  183. 	public RelativeLayout.LayoutParams bottomInParentParams;
  184. 	public LinearLayout.LayoutParams	buttonInBottomParams;
  185. 	public RelativeLayout.LayoutParams	leftInParentParams;
  186. 	public RelativeLayout.LayoutParams	bottomInLeftParams;
  187. 	public LinearLayout.LayoutParams	Left_Bottom_Button_Params;
  188. 	public RelativeLayout.LayoutParams	topInLeftParams;
  189. 	public RelativeLayout.LayoutParams	Left_Top_Temp_Params;
  190. 	public RelativeLayout.LayoutParams	Left_Top_Temp_ToggButton_Params;
  191. 	public RelativeLayout.LayoutParams	Left_Top_Humi_Params;
  192. 	public RelativeLayout.LayoutParams	Left_Center_CtrolButton_Params;
  193. 	public RelativeLayout.LayoutParams[] Left_Center_CtrolButtons_Params;//左上右下
  194. 	public RelativeLayout.LayoutParams	RightInParentParams;
  195. 	public RelativeLayout.LayoutParams	Right_Surface_Params;
  196. 	public RelativeLayout.LayoutParams[] Right_Scale_Button_Params;//大小
  197. 	public RelativeLayout.LayoutParams	Right_Scale_View_Params;
  198.  
  199. 	//声明变量
  200. 	public float scale;//dp -- px
  201. 	public double screenSize;
  202. 	public float density;
  203. 	public int Screen_width;
  204. 	public int Screen_height;
  205. 	public int Bottom_Button_Width = 40;//dp
  206. 	public int Bottom_Back_Height = 5;//dp
  207. 	public int Bottom_Button_Number = 7;
  208. 	public int Left_Bottom_Button_Width = 27;//dp
  209. 	public int BottomInLeft_BottomMarge = 5;//5dp
  210. 	public int Left_Bottom_Button_LeftMarge = 10;//dp
  211. 	public int Left_Bottom_Button_Number = 3;
  212. 	public int Left_Top_TopMarge = 5;
  213. 	public int Left_Top_Temp_LeftMarge = 5;
  214. 	public int Left_Top_Temp_TextSize = 18;
  215. 	public int Left_Top_Temp_ToggButton_Width = 15;
  216. 	public int Left_Top_Temp_ToggButton_Height = 15;
  217. 	public int Left_Top_Temp_ToggButton_TopMarge = 5;
  218. 	public int Left_Top_Humi_View_TopMarge = 5;
  219. 	public int Left_Center_CtrolButton_Width = 150;
  220. 	public int Left_Center_CtrolButton_Height = 150;
  221. 	public int Left_Center_CtrolButton_LeftMarge = 20;
  222. 	public int Left_Center_CtrolButton_BottomMarge = 20;
  223. 	public int Right_Surface_LeftMarge = 5;
  224. 	public int Left_Center_CtrolButton_LeftBtn_Width = 80;
  225. 	public int Left_Center_CtrolButton_LeftBtn_Height = 50;
  226. 	public int Left_Center_CtrolButton_UpBtn_Width = 50;
  227. 	public int Left_Center_CtrolButton_UpBtn_Height = 60;
  228. 	public int Right_Scale_Button_Width = 20;
  229. 	public int Right_Scale_Button_Marge = 3;
  230. 	public int Right_Scale_View_BottomMarge = 18;
  231. }

真机的显示效果如下：

两者虽然在真机上的效果差不多，但是实际是两种不同的实现方式。

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