Android性能优化---布局优化

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:

<?xml version="1.0" encoding="utf-8"?><RelativeLayout  xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:background="@drawable/info_back">       <LinearLayout         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_above="@+id/linearRecordLayout">        <RelativeLayout              android:layout_width="wrap_content"             android:layout_height="fill_parent"             android:layout_marginLeft="15dp"         android:layout_marginRight="15dp">                              <!-- <LinearLayout                android:id="@+id/LinearLayout_left"                 android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:orientation="vertical"                >  -->                <LinearLayout                     android:id="@+id/contronLinearLayout"                    android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:orientation="vertical"                android:layout_alignParentTop="true"                android:layout_marginLeft="20dp">                 <RelativeLayout                         android:layout_width="wrap_content"                android:layout_height="wrap_content"                 android:orientation="horizontal"                        >                <TextView             android:id="@+id/temp_textview"            android:text="T:"            android:textSize="18sp"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textColor="#FFFFFF"                        />                <ToggleButton                     android:id="@+id/temp_max"                    android:layout_width="15dp"                    android:layout_height="15dp"                    android:textOn=" "             android:textOff=" "             android:layout_toRightOf="@+id/temp_textview"            android:layout_alignParentTop="true"            android:layout_marginTop="5dp"            android:background="@drawable/max"            android:visibility="invisible"                    />                </RelativeLayout>        <TextView             android:id="@+id/humidity_textiew"            android:text="H:"            android:textSize="18sp"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textColor="#FFFFFF"            android:layout_marginTop="5dp"/>                </LinearLayout>                 <LinearLayout                     android:id="@+id/BtnControl"                    android:layout_width="150dp"                android:layout_height="150dp"                android:orientation="vertical"           android:layout_marginTop="20dp"           android:layout_alignParentBottom="true"           android:layout_marginBottom="35dp"                android:gravity="center_vertical|center_horizontal"                android:background="@drawable/no_control">                     <Button                     android:id="@+id/up"                    android:layout_width="50dp"                    android:layout_height="60dp"                     android:background="@drawable/kong"/>                <LinearLayout                     android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:orientation="horizontal">                    <Button                     android:id="@+id/left"                    android:layout_width="80dp"                    android:layout_height="50dp"                    android:background="@drawable/kong"/>                     <Button                     android:id="@+id/right"                    android:layout_width="80dp"                    android:layout_height="50dp"                    android:layout_marginLeft="10dp"                     android:background="@drawable/kong"                    />                </LinearLayout>                <Button                     android:id="@+id/down"                    android:layout_width="50dp"                    android:layout_height="60dp"                     android:background="@drawable/kong"                    />                </LinearLayout>                          <!--  </LinearLayout>  -->            <LinearLayout                 android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:orientation="horizontal"                android:layout_alignParentBottom="true"            android:layout_marginBottom="5dp"            android:layout_alignParentLeft="true"            android:layout_marginLeft="0dp">                <Button                 android:id="@+id/about_button"                android:layout_width="27dp"                android:layout_height="27dp"                android:background="@drawable/info_off"                android:layout_marginRight="10dp"                />                 <Button                      android:id="@+id/webserver"                     android:layout_width="27dp"                android:layout_height="27dp"                android:layout_marginRight="10dp"                 android:background="@drawable/net_in_off"                     />                <Button                     android:id="@+id/apConvertButton"                    android:layout_width="27dp"                android:layout_height="27dp"                android:background="@drawable/wifi_switch_off"                     />            </LinearLayout>                    </RelativeLayout>        <RelativeLayout              android:id="@+id/camerSurfaceRelativelayout"             android:layout_width="wrap_content"         android:layout_height="wrap_content">            <LinearLayout     android:layout_width="wrap_content"     android:id="@+id/controlAbsoluteLayout"     android:layout_height="fill_parent"     android:gravity="center_vertical|center_horizontal">        <com.pcareroute.surface.CameraSurfaceView            android:id="@+id/car_camera_surfaceview"            android:layout_width="wrap_content"            android:layout_height="fill_parent" />    </LinearLayout>        <RelativeLayout        android:id="@+id/scale_control_linearLayout"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:padding="5dip" >        <Button            android:id="@+id/zoom_in_button"            android:layout_width="40dp"            android:layout_height="40dp"            android:layout_marginLeft="3dp"             android:layout_marginTop="3dp"            android:background="@drawable/button_zoom_out_icon" >        </Button>        <LinearLayout              android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignParentRight="true"             android:layout_marginRight="60dp"             android:layout_marginTop="3dp"         >        <ToggleButton             android:textOn=" "                  android:textOff=" "              android:id="@+id/record_red"             android:layout_width="18dp"             android:layout_height="18dp"             android:background="@drawable/video_off_led"             android:visibility="invisible"/>       <Chronometer                    android:id="@+id/chronometer1"                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                     android:layout_marginLeft="7dp"                    android:text="Chronometer"             android:visibility="invisible"                    />       </LinearLayout>        <Button            android:layout_alignParentRight="true"            android:id="@+id/zoom_out_button"            android:layout_width="40dp"            android:layout_height="40dp"            android:layout_marginRight="2dp"            android:layout_marginTop="3dp"            android:background="@drawable/button_zoom_in_icon"></Button>    </RelativeLayout>            <LinearLayout            android:id="@+id/RelativeLayoutzoom"            android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:gravity="center_vertical|center_horizontal"    android:layout_centerHorizontal="true"    android:layout_above="@+id/bottomEmpty"    > <TextView         android:id="@+id/scale_textView"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:gravity="center_horizontal"         android:shadowColor="#ff000000"         android:shadowDx="2"         android:shadowDy="0"         android:shadowRadius="2"         android:text="100%"         android:textAppearance="?android:attr/textAppearanceMedium"         android:textStyle="bold" />            </LinearLayout>             <LinearLayout                 android:id="@+id/bottomEmpty"                android:layout_width="fill_parent"    android:layout_height="18dp"    android:layout_alignParentBottom="true">            </LinearLayout>        </RelativeLayout>            </LinearLayout>            <!-- <RelativeLayout        android:id="@+id/scale_control_linearLayout"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:padding="5dip" >        <Button            android:id="@+id/zoom_in_button"            android:layout_width="40dp"            android:layout_height="40dp"            android:layout_marginLeft="25dp"            android:background="@drawable/button_zoom_out_icon" >        </Button>        <Button            android:layout_alignParentRight="true"            android:id="@+id/zoom_out_button"            android:layout_width="40dp"            android:layout_height="40dp"            android:layout_marginRight="25dp"            android:background="@drawable/button_zoom_in_icon" >        </Button> <LinearLayout        android:id="@+id/linearlayout_temp_rh"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_above="@+id/linearRecordLayout"       android:layout_centerVertical="true"           >               <TextView             android:id="@+id/temp_textview"            android:text="T"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textColor="#FFFFFF"                        android:shadowColor="#ff000000"            android:shadowDx="2"            android:shadowDy="0"            android:shadowRadius="2"            />                <TextView             android:id="@+id/humidity_textiew"            android:text="H"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textColor="#FFFFFF"            android:layout_marginLeft="100dp"            android:shadowColor="#ff000000"            android:shadowDx="2"            android:shadowDy="0"            android:shadowRadius="2"            />    </LinearLayout>                    <LinearLayout            android:id="@+id/RelativeLayoutpower"            android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_above="@+id/linearbuttonLayout"    android:layout_centerHorizontal="true"    android:gravity="center_vertical|center_horizontal"    android:layout_centerVertical="true"    android:layout_toRightOf="@+id/RelativeLayoutzoom"    >        </LinearLayout>    </RelativeLayout> -->    <!-- <LinearLayout      android:orientation="vertical"     android:id="@+id/linearControlLayout"     android:visibility="visible"     android:layout_alignParentRight="true"     android:layout_marginRight="10dp"    android:layout_width="50dip"     android:layout_height="fill_parent"     android:gravity="center_vertical|center_horizontal"    >                <com.wificar.surface.DoubleAxisRightControllerSurfaceView              android:layout_gravity="center_vertical"    android:clickable="false"     android:layout_height="180dp"     android:id="@+id/stick_double_axis_right_controller_surfaceview"     android:layout_width="wrap_content"></com.wificar.surface.DoubleAxisRightControllerSurfaceView>        </LinearLayout>      <LinearLayout              android:id="@+id/function_linearLayout"         android:orientation="vertical"         android:layout_width="50dip"         android:layout_alignParentLeft="true"         android:layout_marginLeft="10dp"        android:layout_height="fill_parent"         android:gravity="center_vertical|center_horizontal">         <com.wificar.surface.DoubleAxisLeftControllerSurfaceView         android:layout_gravity="center_vertical"        android:clickable="true"         android:layout_height="180dp"         android:id="@+id/stick_double_axis_left_controller_surfaceview"         android:layout_width="wrap_content"></com.wificar.surface.DoubleAxisLeftControllerSurfaceView>      </LinearLayout>  -->       <!--  <RelativeLayout         android:id="@+id/relativelayout_temp_rh"        android:layout_width="fill_parent"        android:layout_height="80dp"        android:layout_alignParentBottom="true"         > -->    <LinearLayout     android:background="@drawable/button_bar"     android:gravity="center_vertical|center_horizontal"     android:layout_width="fill_parent"     android:layout_height="45dp"     android:id="@+id/linearRecordLayout"     android:layout_alignParentBottom="true">     <ToggleButton                android:id="@+id/send_voice_button"            android:layout_width="40dp"           android:layout_height="40dp"           android:textOn=""           android:textOff=""           android:background="@drawable/talk_off"           android:layout_marginRight="23dip" />     <Button               android:id="@+id/spk_toggle_button"              android:layout_width="40dp"              android:layout_height="40dp"              android:textOn=" "              android:textOff=" "              android:background="@drawable/music_off"              android:layout_marginRight="23dp"             />     <ToggleButton    android:textOn=" "         android:textOff=" "         android:layout_marginRight="23dp"      android:layout_width="40dp"    android:layout_height="40dp"    android:background="@drawable/video_off"    android:id="@+id/camera_shoot_button"    />    <ToggleButton         android:background="@drawable/sound_mute"         android:id="@+id/listen_toggle_button"         android:layout_width="40dp"         android:textOn=" "         android:textOff=" "         android:layout_height="40dp"         android:layout_marginRight="23dp" ></ToggleButton>     <Button            android:id="@+id/take_picture_button"           android:layout_width="40dp"           android:layout_height="40dp"           android:layout_marginRight="23dp"             android:background="@drawable/button_take_photo_icon" />    <ToggleButton         android:background="@drawable/ir_off"         android:id="@+id/light_toggle_button"         android:layout_width="40dp"         android:layout_height="40dp"         android:layout_marginRight="23dp"         android:textOn=" "         android:textOff=" " ></ToggleButton>    <Button         android:background="@drawable/share_off"        android:id="@+id/shared"        android:layout_width="40dp"         android:layout_height="40dp"        />   </LinearLayout>    <!-- </RelativeLayout> -->    </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:

package com.pcareroute;import com.seuic.pcareroute.AppLog;import com.seuic.pcareroute.surface.CameraSurface;import com.seuic.pcareroute.util.PcareRouteParams;import com.seuic.pcareroute.util.ToolsUnility;import android.app.Activity;import android.os.Bundle;import android.widget.Button;import android.widget.LinearLayout;import android.widget.RelativeLayout;import android.widget.TextView;import android.widget.ToggleButton;public class PcareRouteMain extends Activity{public static final String TAG = "PcareRouteMain";public PcareRouteMain instance;PcareRouteParams pRouteParams;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);ToolsUnility.getToolsUnilityInstance(this).noTitleAndStaBar(this); //去掉标题栏和状态栏instance = this;pRouteParams = new PcareRouteParams(instance);AppLog.enableLogging(true);initLayout();}//初始化布局和组件public void initLayout(){Parent = new RelativeLayout(getApplicationContext());Parent.setBackgroundResource(R.drawable.info_back);BottomInParent = new LinearLayout(getApplicationContext());BottomInParent.setId(_R.id.bottom_in_parent);BottomInParent.setBackgroundResource(R.drawable.button_bar);ButtonInBottom = new ToggleButton[pRouteParams.Bottom_Button_Number];for (int i = 0; i < pRouteParams.Bottom_Button_Number; i++) {ButtonInBottom[i] = new ToggleButton(getApplicationContext());ButtonInBottom[i].setBackgroundResource(ButtonInBottomImage[i]);ButtonInBottom[i].setTextOff(" ");ButtonInBottom[i].setTextOn(" ");ButtonInBottom[i].setText(" ");BottomInParent.addView(ButtonInBottom[i], pRouteParams.buttonInBottomParams);}Parent.addView(BottomInParent, pRouteParams.bottomInParentParams);LeftInParent = new RelativeLayout(getApplicationContext());LeftInParent.setId(_R.id.left_in_parent);BottomInLeft = new LinearLayout(getApplicationContext());BottomInLeft.setId(_R.id.bottom_in_left);ButtonInLeft = new Button[pRouteParams.Left_Bottom_Button_Number];for (int i = 0; i < pRouteParams.Left_Bottom_Button_Number; i++) {ButtonInLeft[i] = new Button(getApplicationContext());ButtonInLeft[i].setText(" ");ButtonInLeft[i].setBackgroundResource(ButtonInLeftImage[i]);BottomInLeft.addView(ButtonInLeft[i], pRouteParams.Left_Bottom_Button_Params);}LeftInParent.addView(BottomInLeft, pRouteParams.bottomInLeftParams);tempView = new TextView(getApplicationContext());tempView.setTextSize(pRouteParams.Left_Top_Temp_TextSize);tempView.setText("T:");tempView.setId(_R.id.tempview_in_left);LeftInParent.addView(tempView, pRouteParams.Left_Top_Temp_Params);tempRoll = new ToggleButton(getApplicationContext());tempRoll.setBackgroundResource(R.drawable.max);tempRoll.setText(" ");tempRoll.setTextOff(" ");tempRoll.setTextOn(" ");//tempRoll.setVisibility(View.INVISIBLE);LeftInParent.addView(tempRoll, pRouteParams.Left_Top_Temp_ToggButton_Params);humidityView = new TextView(getApplicationContext());humidityView.setText("H:");humidityView.setId(_R.id.humiview_in_left);humidityView.setTextSize(pRouteParams.Left_Top_Temp_TextSize);LeftInParent.addView(humidityView, pRouteParams.Left_Top_Humi_Params);CenterInLeft = new RelativeLayout(getApplicationContext());ControlBtn = new Button[CtrolBtnNumber];for (int i = 0; i < CtrolBtnNumber; i++) {ControlBtn[i] = new Button(getApplicationContext());ControlBtn[i].setBackgroundResource(Btn_Ctrol_In_Left_Image[i]);CenterInLeft.addView(ControlBtn[i], pRouteParams.Left_Center_CtrolButtons_Params[i]);}LeftInParent.addView(CenterInLeft, pRouteParams.Left_Center_CtrolButton_Params);Parent.addView(LeftInParent, pRouteParams.leftInParentParams);RightInParent = new RelativeLayout(getApplicationContext());cameraSurface = new CameraSurface(getApplicationContext());RightInParent.addView(cameraSurface, pRouteParams.Right_Surface_Params);ScaleBtn = new Button[ScaleBtnNumber];for (int i = 0; i < ScaleBtnNumber; i++) {ScaleBtn[i] = new Button(getApplicationContext());ScaleBtn[i].setBackgroundResource(Btn_Scale_In_Right_Image[i]);RightInParent.addView(ScaleBtn[i], pRouteParams.Right_Scale_Button_Params[i]);}scaleView = new TextView(getApplicationContext());scaleView.setText("100%");scaleView.getPaint().setFakeBoldText(true);//加粗scaleView.setTextSize(20);RightInParent.addView(scaleView, pRouteParams.Right_Scale_View_Params);Parent.addView(RightInParent, pRouteParams.RightInParentParams);setContentView(Parent, pRouteParams.paramentParams);}//声明组件和布局public RelativeLayoutParent;public LinearLayoutBottomInParent;public RelativeLayoutLeftInParent;public LinearLayoutBottomInLeft;public RelativeLayoutCenterInLeft;public RelativeLayoutRightInParent;public CameraSurfacecameraSurface;public ToggleButton[]ButtonInBottom;public Button[] ButtonInLeft;public Button[] ControlBtn;public Button[] ScaleBtn;public TextView tempView, humidityView;public TextView scaleView;public ToggleButton tempRoll;//声明变量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public int[] Btn_Ctrol_In_Left_Image = {R.drawable.left_off, R.drawable.up_off, R.drawable.right_off, R.drawable.down_off};public int CtrolBtnNumber = 4;public int[] Btn_Scale_In_Right_Image = {R.drawable.zoom_out, R.drawable.zoom_in};public int ScaleBtnNumber = 2;}

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

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

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：

package com.seuic.pcareroute.util;import com.pcareroute._R;import android.app.Activity;import android.util.DisplayMetrics;import android.view.Gravity;import android.widget.LinearLayout;import android.widget.RelativeLayout;public class PcareRouteParams {public static final String TAG = "PcareRouteParams";Activity activity;public PcareRouteParams(Activity activity){this.activity = activity;getDisplayMetrics();initVar();initLayoutParams();}//初始化變量public void initVar(){if (screenSize > 5.8) {Bottom_Button_Width = dip2px(60);Left_Bottom_Button_Width = dip2px(35);Bottom_Back_Height = dip2px(70);Left_Top_TopMarge = dip2px(20);Left_Top_Temp_LeftMarge = dip2px(40);Left_Top_Temp_TextSize = 35;Left_Top_Temp_ToggButton_Width = dip2px(28);Left_Top_Temp_ToggButton_Height = dip2px(30);Left_Top_Temp_ToggButton_TopMarge = dip2px(20);Left_Top_Humi_View_TopMarge = dip2px(5);Left_Center_CtrolButton_Width = dip2px(300);Left_Center_CtrolButton_Height = dip2px(250);Left_Center_CtrolButton_LeftMarge = dip2px(20);Left_Center_CtrolButton_BottomMarge = dip2px(20);Right_Surface_LeftMarge = Left_Center_CtrolButton_LeftMarge;Left_Center_CtrolButton_LeftBtn_Width = dip2px(135);Left_Center_CtrolButton_LeftBtn_Height = dip2px(90);Left_Center_CtrolButton_UpBtn_Width = dip2px(100);Left_Center_CtrolButton_UpBtn_Height = dip2px(135);Right_Scale_Button_Width = dip2px(50);Right_Scale_Button_Marge = dip2px(7);Right_Scale_View_BottomMarge = dip2px(40);}else if(screenSize < 3.8){Bottom_Button_Width = dip2px(35);Left_Bottom_Button_Width = dip2px(18);Bottom_Back_Height = dip2px(35);Left_Top_TopMarge = dip2px(0);Left_Top_Temp_LeftMarge = dip2px(10);Left_Top_Temp_TextSize = 18;Left_Top_Temp_ToggButton_Width = dip2px(15);Left_Top_Temp_ToggButton_Height = dip2px(15);Left_Top_Temp_ToggButton_TopMarge = dip2px(5);Left_Top_Humi_View_TopMarge = dip2px(3);Left_Center_CtrolButton_Width = dip2px(120);Left_Center_CtrolButton_Height = dip2px(120);Left_Center_CtrolButton_LeftMarge = dip2px(20);Left_Center_CtrolButton_BottomMarge = dip2px(5);Right_Surface_LeftMarge = Left_Center_CtrolButton_LeftMarge;Left_Center_CtrolButton_LeftBtn_Width = dip2px(40);Left_Center_CtrolButton_LeftBtn_Height = dip2px(30);Left_Center_CtrolButton_UpBtn_Width = dip2px(30);Left_Center_CtrolButton_UpBtn_Height = dip2px(40);Right_Scale_Button_Width = dip2px(30);Right_Scale_Button_Marge = dip2px(3);Right_Scale_View_BottomMarge = dip2px(15);}else {Bottom_Button_Width = dip2px(40);Left_Bottom_Button_Width = dip2px(27);Bottom_Back_Height = dip2px(45);Left_Top_TopMarge = dip2px(0);Left_Top_Temp_LeftMarge = dip2px(20);Left_Top_Temp_TextSize = 18;Left_Top_Temp_ToggButton_Width = dip2px(15);Left_Top_Temp_ToggButton_Height = dip2px(15);Left_Top_Temp_ToggButton_TopMarge = dip2px(5);Left_Top_Humi_View_TopMarge = dip2px(5);Left_Center_CtrolButton_Width = dip2px(150);Left_Center_CtrolButton_Height = dip2px(150);Left_Center_CtrolButton_LeftMarge = dip2px(20);Left_Center_CtrolButton_BottomMarge = dip2px(10);Right_Surface_LeftMarge = Left_Center_CtrolButton_LeftMarge;Left_Center_CtrolButton_LeftBtn_Width = dip2px(80);Left_Center_CtrolButton_LeftBtn_Height = dip2px(50);Left_Center_CtrolButton_UpBtn_Width = dip2px(50);Left_Center_CtrolButton_UpBtn_Height = dip2px(60);Right_Scale_Button_Width = dip2px(40);Right_Scale_Button_Marge = dip2px(3);Right_Scale_View_BottomMarge = dip2px(18);}Left_Bottom_Button_LeftMarge = dip2px(10);BottomInLeft_BottomMarge = dip2px(5);}public int dip2px(float dpValue) {          return (int)(dpValue * scale + 0.5f);    }//获取屏幕的宽度，高度和密度以及dp / px public void getDisplayMetrics() {  DisplayMetrics dm = new DisplayMetrics();  dm = activity.getApplicationContext().getResources().getDisplayMetrics();  Screen_width = dm.widthPixels;  Screen_height = dm.heightPixels;  scale = activity.getResources().getDisplayMetrics().density;  density = dm.density;  double bb = Math.sqrt(Math.pow(Screen_width, 2)+ Math.pow(Screen_height, 2));  screenSize = bb / (160 * dm.density);} //初始化布局参数public void initLayoutParams(){paramentParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);bottomInParentParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, Bottom_Back_Height);bottomInParentParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);buttonInBottomParams = new LinearLayout.LayoutParams(Bottom_Button_Width, Bottom_Button_Width);buttonInBottomParams.gravity = Gravity.CENTER_VERTICAL;//底部包含组件布局参数int jiange = (Screen_width - Bottom_Button_Width * Bottom_Button_Number)/(Bottom_Button_Number + 1);buttonInBottomParams.leftMargin = jiange;leftInParentParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.MATCH_PARENT);leftInParentParams.addRule(RelativeLayout.ABOVE, _R.id.bottom_in_parent);bottomInLeftParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);bottomInLeftParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);bottomInLeftParams.bottomMargin = BottomInLeft_BottomMarge;Left_Bottom_Button_Params = new LinearLayout.LayoutParams(Left_Bottom_Button_Width, Left_Bottom_Button_Width);Left_Bottom_Button_Params.leftMargin = Left_Bottom_Button_LeftMarge;Left_Bottom_Button_Params.gravity = Gravity.CENTER_VERTICAL;Left_Top_Temp_Params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);Left_Top_Temp_Params.topMargin = Left_Top_TopMarge;Left_Top_Temp_Params.leftMargin = Left_Top_Temp_LeftMarge;Left_Top_Temp_ToggButton_Params = new RelativeLayout.LayoutParams(Left_Top_Temp_ToggButton_Width, Left_Top_Temp_ToggButton_Height);Left_Top_Temp_ToggButton_Params.addRule(RelativeLayout.RIGHT_OF, _R.id.tempview_in_left);Left_Top_Temp_ToggButton_Params.topMargin = Left_Top_Temp_ToggButton_TopMarge;Left_Top_Humi_Params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);Left_Top_Humi_Params.addRule(RelativeLayout.BELOW, _R.id.tempview_in_left);Left_Top_Humi_Params.topMargin = Left_Top_Humi_View_TopMarge;Left_Top_Humi_Params.addRule(RelativeLayout.ALIGN_LEFT, _R.id.tempview_in_left);Left_Center_CtrolButton_Params = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_Width, Left_Center_CtrolButton_Height);Left_Center_CtrolButton_Params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);Left_Center_CtrolButton_Params.bottomMargin = BottomInLeft_BottomMarge + Left_Center_CtrolButton_BottomMarge + Left_Bottom_Button_Width;Left_Center_CtrolButton_Params.leftMargin = Left_Center_CtrolButton_LeftMarge;//Left_Center_CtrolButton_Params.rightMargin = Left_Center_CtrolButton_LeftMarge;Left_Center_CtrolButtons_Params = new RelativeLayout.LayoutParams[4];Left_Center_CtrolButtons_Params[0] = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_UpBtn_Height, Left_Center_CtrolButton_UpBtn_Width);Left_Center_CtrolButtons_Params[0].addRule(RelativeLayout.CENTER_VERTICAL);Left_Center_CtrolButtons_Params[1] = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_UpBtn_Width, Left_Center_CtrolButton_UpBtn_Height);Left_Center_CtrolButtons_Params[1].addRule(RelativeLayout.CENTER_HORIZONTAL);Left_Center_CtrolButtons_Params[2] = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_UpBtn_Height, Left_Center_CtrolButton_UpBtn_Width);Left_Center_CtrolButtons_Params[2].addRule(RelativeLayout.ALIGN_PARENT_RIGHT);Left_Center_CtrolButtons_Params[2].addRule(RelativeLayout.CENTER_VERTICAL);Left_Center_CtrolButtons_Params[3] = new RelativeLayout.LayoutParams(Left_Center_CtrolButton_UpBtn_Width, Left_Center_CtrolButton_UpBtn_Height);Left_Center_CtrolButtons_Params[3].addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);Left_Center_CtrolButtons_Params[3].addRule(RelativeLayout.CENTER_HORIZONTAL);RightInParentParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);RightInParentParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);RightInParentParams.addRule(RelativeLayout.RIGHT_OF, _R.id.left_in_parent);RightInParentParams.addRule(RelativeLayout.ABOVE, _R.id.bottom_in_parent);RightInParentParams.leftMargin = Right_Surface_LeftMarge;Right_Surface_Params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);Right_Scale_Button_Params = new RelativeLayout.LayoutParams[2];Right_Scale_Button_Params[0] = new RelativeLayout.LayoutParams(Right_Scale_Button_Width, Right_Scale_Button_Width);Right_Scale_Button_Params[0].leftMargin = Right_Scale_Button_Marge;Right_Scale_Button_Params[0].topMargin = Right_Scale_Button_Marge;Right_Scale_Button_Params[1] = new RelativeLayout.LayoutParams(Right_Scale_Button_Width, Right_Scale_Button_Width);Right_Scale_Button_Params[1].addRule(RelativeLayout.ALIGN_PARENT_RIGHT);Right_Scale_Button_Params[1].rightMargin = Right_Scale_Button_Marge;Right_Scale_Button_Params[1].topMargin = Right_Scale_Button_Marge;Right_Scale_View_Params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);Right_Scale_View_Params.addRule(RelativeLayout.CENTER_HORIZONTAL);Right_Scale_View_Params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);Right_Scale_View_Params.bottomMargin = Right_Scale_View_BottomMarge;}//声明布局和组件public RelativeLayout.LayoutParams paramentParams;public RelativeLayout.LayoutParams bottomInParentParams;public LinearLayout.LayoutParamsbuttonInBottomParams;public RelativeLayout.LayoutParamsleftInParentParams;public RelativeLayout.LayoutParamsbottomInLeftParams;public LinearLayout.LayoutParamsLeft_Bottom_Button_Params;public RelativeLayout.LayoutParamstopInLeftParams;public RelativeLayout.LayoutParamsLeft_Top_Temp_Params;public RelativeLayout.LayoutParamsLeft_Top_Temp_ToggButton_Params;public RelativeLayout.LayoutParamsLeft_Top_Humi_Params;public RelativeLayout.LayoutParamsLeft_Center_CtrolButton_Params;public RelativeLayout.LayoutParams[] Left_Center_CtrolButtons_Params;//左上右下public RelativeLayout.LayoutParamsRightInParentParams;public RelativeLayout.LayoutParamsRight_Surface_Params;public RelativeLayout.LayoutParams[] Right_Scale_Button_Params;//大小public RelativeLayout.LayoutParamsRight_Scale_View_Params;//声明变量public float scale;//dp -- pxpublic double screenSize;public float density;public int Screen_width;public int Screen_height;public int Bottom_Button_Width = 40;//dppublic int Bottom_Back_Height = 5;//dppublic int Bottom_Button_Number = 7;public int Left_Bottom_Button_Width = 27;//dppublic int BottomInLeft_BottomMarge = 5;//5dppublic int Left_Bottom_Button_LeftMarge = 10;//dppublic int Left_Bottom_Button_Number = 3;public int Left_Top_TopMarge = 5;public int Left_Top_Temp_LeftMarge = 5;public int Left_Top_Temp_TextSize = 18;public int Left_Top_Temp_ToggButton_Width = 15;public int Left_Top_Temp_ToggButton_Height = 15;public int Left_Top_Temp_ToggButton_TopMarge = 5;public int Left_Top_Humi_View_TopMarge = 5;public int Left_Center_CtrolButton_Width = 150;public int Left_Center_CtrolButton_Height = 150;public int Left_Center_CtrolButton_LeftMarge = 20;public int Left_Center_CtrolButton_BottomMarge = 20;public int Right_Surface_LeftMarge = 5;public int Left_Center_CtrolButton_LeftBtn_Width = 80;public int Left_Center_CtrolButton_LeftBtn_Height = 50;public int Left_Center_CtrolButton_UpBtn_Width = 50;public int Left_Center_CtrolButton_UpBtn_Height = 60;public int Right_Scale_Button_Width = 20;public int Right_Scale_Button_Marge = 3;public int Right_Scale_View_BottomMarge = 18;}

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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