Android Calculator maker 1. Layout

1.activity_main.xml File Layout

<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:tools= "http// Schemas.android.com/tools "android:layout_width=" match_parent "android:layout_height=" Match_parent "Android: paddingleft= "@dimen/activity_horizontal_margin" android:paddingright= "@dimen/activity_horizontal_margin" Android :p addingtop= "@dimen/activity_vertical_margin" android:orientation= "vertical" android:paddingbottom= "@dimen/ Activity_vertical_margin "tools:context=". Mainactivity "><edittext android:layout_width=" fill_parent "android:layout_height=" 90DP "android:gravity=" ri        Ght|center_vertical "android:id=" @+id/edit_text1 "android:background=" @drawable/white_bg "/> <LinearLayout        android:layout_margintop= "10DP" android:orientation= "vertical" android:layout_width= "fill_parent" android:layout_height= "Fill_parent" > <linearlayout android:layout_weight= "1" Android  : Layout_width= "Fill_parent"          android:layout_height= "0DP" android:id= "@+id/ll1" android:orientation= "Horizontal"                > <button android:layout_weight= "1" android:layout_width= "0DP"                android:layout_height= "Fill_parent" android:text= "C" android:textsize= "30SP"                Android:id= "@+id/bt_clear"/> <button android:layout_weight= "1"                 Android:layout_width= "0DP" android:layout_height= "fill_parent" android:text= "DEL"                 Android:textsize= "30SP" android:id= "@+id/bt_del"/> <button android:layout_weight= "1" android:layout_width= "0DP" android:layout_height= " Fill_parent "android:text=" ÷ "android:textsize=" 30sp "android:id=" @+id/bt_div IDE "/> <button android:layout_weight= "1" android:layout_width= "0DP" android:layou t_height= "Fill_parent" android:text= "x" android:textsize= "30SP" android:id= "@ +id/bt_multipy "/> </LinearLayout> <linearlayout android:layout_weight             = "1" android:layout_width= "fill_parent" android:layout_height= "0DP" android:id= "@+id/ll2" android:orientation= "Horizontal" > <button android:layout_weight= "1 "Android:layout_width=" 0DP "android:layout_height=" Fill_parent "Android:text = "7" android:textsize= "30SP" android:id= "@+id/bt_7"/> <butt On android:layout_weight= "1" android:layout_width= "0DP" android:layout_height = "Fill_pareNT "android:text=" 8 "android:textsize=" 30SP "android:id=" @+id/bt_8 "                /> <button android:layout_weight= "1" android:layout_width= "0DP"                android:layout_height= "Fill_parent" android:text= "9" android:textsize= "30SP"                Android:id= "@+id/bt_9"/> <button android:layout_weight= "1"                Android:layout_width= "0DP" android:layout_height= "fill_parent" android:text= "-" Android:textsize= "30SP" android:id= "@+id/bt_minuse"/> </linearlay            Out> <linearlayout android:layout_weight= "1" android:layout_width= "Fill_parent" android:layout_height= "0DP" android:id= "@+id/ll3" android:layout_below= "@id/ll2" Android Oid:orientation= "HorizonTal "> <button android:layout_weight=" 1 "android:layout_width=" 0 DP "android:layout_height=" Fill_parent "android:text=" 4 "android:textsize=" 30 SP "android:id=" @+id/bt_4 "/> <button android:layout_weight= "1" android:layout_width= "0DP" android:layout_height= "Fill_parent" Android:te xt= "5" android:textsize= "30SP" android:id= "@+id/bt_5"/> <bu Tton android:layout_weight= "1" android:layout_width= "0DP" Android:layout_heig ht= "Fill_parent" android:text= "6" android:textsize= "30SP" android:id= "@+id/bt _6 "/> <button android:layout_weight=" 1 "Android:layout_widt H= "0DP" android:layout_height= "Fill_parent" android:text= "+" android:textsize= "30SP" a Ndroid:id= "@+id/bt_plus"/> </LinearLayout> <linearlayout Android:layo ut_weight= "2" android:layout_width= "Fill_parent" android:layout_height= "0DP" > <line Arlayout android:orientation= "Vertical" android:layout_weight= "3" Android:lay Out_width= "0DP" android:layout_height= "Fill_parent" > <linearlayout android:                layout_weight= "1" android:layout_width= "fill_parent" android:layout_height= "0DP" >                    <button android:layout_weight= "1" android:id= "@+id/btn_1"                    android:text= "1" android:textsize= "30sp" android:layout_width= "0DP" Android:layout_height= "Fill_parent"/> <button android:layout_weight= "1" Android : id= "@+id/btn_2" android:text= "2" android:textsize= "30sp" Android                    : layout_width= "0DP" android:layout_height= "fill_parent"/> <button                    android:layout_weight= "1" android:id= "@+id/btn_3" android:text= "3" Android:textsize= "30SP" android:layout_width= "0DP" android:layout_height= "fill                _parent "/> </LinearLayout> <linearlayout android:layout_weight=" 1 "                    Android:layout_width= "Fill_parent" android:layout_height= "0DP" > <button                    android:layout_weight= "2" android:id= "@+id/btn_0" android:text= "0" Android: textsize= "30sp" android:layout_width= "0DP" android:layout_height= "Fill_parent"/&gt                ;                    <button android:layout_weight= "1" android:id= "@+id/btn_point"                    Android:text= "." Android:textsize= "30SP" android:layout_width= "0DP" android:layout_height= "Fill_paren T "/> </LinearLayout> </LinearLayout> <linearlayout android                oid:layout_weight= "1" android:layout_width= "0DP" android:layout_height= "Fill_parent" > <button android:layout_width= "fill_parent" android:layout_height= "fil L_parent "android:text=" = "android:id=" @+id/btn_dengyu "android:t Extsize= "30sp"/> </LinearLayout> </linearlaYout> </LinearLayout></LinearLayout> 

　　

2.mainfest.xml settings

<activity    android:theme= "@android: Style/theme.black.notitlebar"/>//Theme Black no title

The writing of 3.color.xml

<?xml version= "1.0" encoding= "Utf-8"?><resources> <color name=    "White" > #ffffff </color>    <color name= "Black" > #000000 </color></resources>

4.drawable Create White_bg.xml as EditText white background

<?xml version= "1.0" encoding= "Utf-8"? ><shape xmlns:android= "Http://schemas.android.com/apk/res/android" >    <corners android:radius= "5DP"/>//Corner radius 5DP fillet    <solid//Fill color        android:color= "@co Lor/white "        /> </shape>

　　

①<corners/>: Sets the fillet. Android:radius= "5DP": The fillet radius is 5DP.
②<gradient/>: Gradient of Image color. Start color: startcolor= "@color/white". End color: endcolor= "@color/red"
③<stroke/>: Border. Width= "1DP": Border width. Color= "@color/black": Border color.
④<solid/>: Fill Color. Color= "@color/white": The fill color is white.

Android Calculator maker 1. Layout