Android主界面

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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="@drawable/huaxue2"     android:orientation="vertical"     tools:context=".MainActivity"     >     <TextView         android:id="@+id/shouye_webroom"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_marginLeft="195dp"         android:layout_marginTop="65dp"         android:text="                        "           android:textSize="30sp"         android:textColor="#000000"         />     <TextView         android:id="@+id/shouye_book"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_marginLeft="195dp"         android:layout_marginTop="45dp"         android:text="                       "         android:textSize="30sp"         android:textColor="#000000"         />     <TextView         android:id="@+id/shouye_sc"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_marginLeft="195dp"         android:layout_marginTop="45dp"         android:text="                           "         android:textSize="30sp"         android:textColor="#000000"         />     <TextView         android:id="@+id/shouye_our"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_marginLeft="235dp"         android:layout_marginTop="235dp"         android:text="             "           android:textSize="30sp"         android:textColor="#000000"         />     </LinearLayout>

　　包括界面的绘制，以及按键格式