Android性能优化—布局优化 Android性能优化—布局优化

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Android性能优化—布局优化 Android性能优化—布局优化

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Android性能优化---布局优化

分类： android2013-06-18
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性能优化布局

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:

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<?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:

[java]view

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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;  

    @Override  

    protected 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 RelativeLayout   Parent;  

    public LinearLayout     BottomInParent;  

    public RelativeLayout   LeftInParent;  

    public LinearLayout     BottomInLeft;  

    public RelativeLayout   CenterInLeft;  

    public RelativeLayout   RightInParent;  

    public CameraSurface    cameraSurface;  

    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

[java]view

 plaincopy

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：

[java]view

 plaincopy

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.LayoutParams    buttonInBottomParams;  

    public RelativeLayout.LayoutParams  leftInParentParams;  

    public RelativeLayout.LayoutParams  bottomInLeftParams;  

    public LinearLayout.LayoutParams    Left_Bottom_Button_Params;  

    public RelativeLayout.LayoutParams  topInLeftParams;  

    public RelativeLayout.LayoutParams  Left_Top_Temp_Params;  

    public RelativeLayout.LayoutParams  Left_Top_Temp_ToggButton_Params;  

    public RelativeLayout.LayoutParams  Left_Top_Humi_Params;  

    public RelativeLayout.LayoutParams  Left_Center_CtrolButton_Params;  

    public RelativeLayout.LayoutParams[] Left_Center_CtrolButtons_Params;//左上右下  

    public RelativeLayout.LayoutParams  RightInParentParams;  

    public RelativeLayout.LayoutParams  Right_Surface_Params;  

    public RelativeLayout.LayoutParams[] Right_Scale_Button_Params;//大小  

    public RelativeLayout.LayoutParams  Right_Scale_View_Params;  

    //声明变量  

    public float scale;//dp -- px  

    public double screenSize;  

    public float density;  

    public int Screen_width;  

    public int Screen_height;  

    public int Bottom_Button_Width = 40;//dp  

    public int Bottom_Back_Height = 5;//dp  

    public int Bottom_Button_Number = 7;  

    public int Left_Bottom_Button_Width = 27;//dp  

    public int BottomInLeft_BottomMarge = 5;//5dp  

    public int Left_Bottom_Button_LeftMarge = 10;//dp  

    public 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。

【上篇】onCreate（）方法中的参数Bundle savedInstanceState 的意义用法 onCreate（）方法中的参数Bundle savedInstanceState 的意义用法
【下篇】Android SMS —— 读取短信联系人 Android SMS（一） —— 读取短信Android SMS（二）—— 读取短信保存到 SQLiteAndroid Contacts（一）—— 读取联系人Android Contacts（二）—— SMS 短信与 Contacts 联系人关联

作者: Belaynamn

该日志由 Belaynamn 于6年前发表在综合分类下，最后更新于 2017年12月11日.
转载请注明: Android性能优化—布局优化 Android性能优化—布局优化 | 学步园 +复制链接

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Android性能优化—布局优化 Android性能优化—布局优化

Android性能优化---布局优化

作者: Belaynamn

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