一、 界面布局：
（1）、 主界面：
如下图1所示:
图1-主界面
Activity_main.xml源代码：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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/pp"
tools:context=".MainActivity">
<Button
android:id="@+id/button"
android:layout_width="219dp"
android:layout_height="45dp"
android:background="@drawable/shape"
android:fontFamily="sans-serif-black"
android:text="@string/button"
android:textAlignment="center"
android:textColor="@color/colorPrimary"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline6"
app:layout_constraintVertical_bias="0.437" />
<Button
android:id="@+id/btn_kizai"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/shape"
android:fontFamily="sans-serif-black"
android:text="@string/button_aboutme"
android:textColor="@color/colorPrimary"
app:layout_constraintBottom_toTopOf="@+id/guideline9"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline9" />
<Button
android:id="@+id/btn_BMI"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/shape"
android:fontFamily="sans-serif-black"
android:text="@string/adoutBMI"
android:textAlignment="center"
android:textColor="@color/colorPrimary"
app:layout_constraintBottom_toTopOf="@+id/guideline7"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline7" />
<EditText
android:id="@+id/editText"
android:layout_width="125dp"
android:layout_height="52dp"
android:autofillHints=""
android:digits=".0123456789"
android:ems="10"
android:fontFamily="sans-serif-black"
android:hint="@string/height_hint"
android:inputType="number"
android:textAlignment="textStart"
android:textColor="#FFFFFF"
android:textColorHint="#ffffff"
app:layout_constraintBottom_toTopOf="@+id/guideline4"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.557"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline4"
app:layout_constraintVertical_bias="0.511" />
<EditText
android:id="@+id/editText2"
android:layout_width="125dp"
android:layout_height="52dp"
android:autofillHints=""
android:digits=".0123456789."
android:ems="10"
android:fontFamily="sans-serif-black"
android:hint="@string/weight_hint"
android:inputType="number"
android:textAlignment="textStart"
android:textColor="#FFFFFF"
android:textColorHint="#ffffff"
app:layout_constraintBottom_toTopOf="@+id/guideline5"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.552"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline5"
app:layout_constraintVertical_bias="0.557" />
<ImageView
android:id="@+id/imageView"
android:layout_width="29dp"
android:layout_height="29dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:contentDescription="@string/image_back"
app:layout_constraintBottom_toTopOf="@+id/guideline2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="@+id/guideline"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
app:srcCompat="@drawable/ic_close_black_24dp" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="75dp"
android:layout_height="75dp"
android:contentDescription="@string/Sex_show"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/guideline"
app:layout_constraintTop_toTopOf="@+id/guideline3"
app:layout_constraintVertical_bias="0.499"
app:srcCompat="@drawable/men" />
<RadioGroup
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toStartOf="@+id/guideline"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline3">
<RadioButton
android:id="@+id/radioButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:fontFamily="sans-serif-black"
android:text="@string/radiobutton"
android:textColor="#ffffff"
android:textSize="18sp" />
<RadioButton
android:id="@+id/radioButton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-black"
android:text="@string/radiobutton2"
android:textColor="#ffffff"
android:textSize="18sp" />
</RadioGroup>
<TextView
android:id="@+id/TextView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/archivo_black"
android:text="@string/TextView1"
android:textColor="#FFFFFF"
android:textSize="30sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/guideline2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline2"
app:layout_constraintVertical_bias="0.147" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:fontFamily="sans-serif-black"
android:text="@string/textview3"
android:textColor="#FFFFFF"
android:textSize="18sp"
app:layout_constraintBottom_toTopOf="@+id/guideline4"
app:layout_constraintEnd_toStartOf="@+id/editText"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline4"
app:layout_constraintVertical_bias="0.958" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:fontFamily="sans-serif-black"
android:text="@string/textview4"
android:textColor="#FFFFFF"
android:textSize="18sp"
app:layout_constraintBottom_toTopOf="@+id/guideline5"
app:layout_constraintEnd_toStartOf="@+id/editText2"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline5"
app:layout_constraintVertical_bias="0.541" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.1" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.25" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.35" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.4" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.6" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.95" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.85" />
<TextView
android:id="@+id/textView9"
android:layout_width="71dp"
android:layout_height="25dp"
android:fontFamily="sans-serif-black"
android:text="@string/textview9"
android:textColor="#FFFFFF"
android:textSize="18sp"
app:layout_constraintBottom_toTopOf="@+id/guideline4"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="@+id/editText"
app:layout_constraintTop_toTopOf="@+id/guideline4"
app:layout_constraintVertical_bias="0.4" />
<TextView
android:id="@+id/textView12"
android:layout_width="52dp"
android:layout_height="24dp"
android:fontFamily="sans-serif-black"
android:text="@string/textview12"
android:textColor="#FFFFFF"
android:textSize="18sp"
app:layout_constraintBottom_toTopOf="@+id/guideline5"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.026"
app:layout_constraintStart_toEndOf="@+id/editText2"
app:layout_constraintTop_toTopOf="@+id/guideline5" />
</androidx.constraintlayout.widget.ConstraintLayout>
（2）、测试结果界面：
如下图2所示
Activity_bmiresult.xml源代码：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".BmiresultActivity">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.15" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.5" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline25"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.5" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline26"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.6" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline27"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.8" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.9" />
<!--<ImageView
android:id="@+id/image_show"
android:layout_width="400dp"
android:layout_height="400dp"
android:contentDescription="@string/imageShow"
app:layout_constraintBottom_toTopOf="@+id/guideline12"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline11"
android:src="@drawable/ps"/>-->
<pl.droidsonroids.gif.GifImageView
android:id="@+id/gifimage_show"
android:layout_width="246dp"
android:layout_height="243dp"
android:src="@drawable/fp"
app:layout_constraintBottom_toTopOf="@+id/guideline12"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.496"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline11"
app:layout_constraintVertical_bias="0.625" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-black"
android:text="@string/result"
android:textAlignment="center"
android:textColor="#0F9365"
android:textSize="18sp"
app:layout_constraintBottom_toTopOf="@+id/guideline26"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline12"
app:layout_constraintVertical_bias="0.478" />
<TextView
android:id="@+id/textView2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-black"
android:text="@string/textview2"
android:textAlignment="center"
android:textColor="@color/colorPrimary"
android:textSize="18sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/guideline11"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button2"
android:layout_width="190dp"
android:layout_height="52dp"
android:layout_marginBottom="16dp"
android:background="@drawable/shape"
android:fontFamily="sans-serif-black"
android:text="@string/button2"
android:textColor="@color/colorPrimary"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline13" />
<TextView
android:id="@+id/tv_sport"
android:layout_width="0dp"
android:layout_height="0dp"
android:fontFamily="sans-serif-black"
android:text="@string/tv_sport"
android:textAlignment="center"
android:textColor="#FF008C"
android:textSize="12sp"
app:layout_constraintBottom_toTopOf="@+id/guideline27"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline26" />
<Button
android:id="@+id/btn_sport"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:background="@drawable/shape"
android:fontFamily="sans-serif-black"
android:text="@string/button_sport"
android:textColor="#DA0379"
app:layout_constraintBottom_toTopOf="@+id/guideline13"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline27"
app:layout_constraintVertical_bias="0.0" />
</androidx.constraintlayout.widget.ConstraintLayout>
（3）、按钮自定义形状
Shape.xml源代码：
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<stroke
android:width="1dp"
android:color="#0000ff"
android:dashWidth="4dp"
android:dashGap="4dp" />
<corners android:radius="15dp"/><!--设置圆角，圆角半径为15dp-->
<solid android:color="#FBEEFF"/><!--设置填充色-->
<!--<stroke android:width="1dp" android:color="#0000ff" />-->
</shape>
(4) 、自定义Dialog样式
如下图4所示：
Aboutme.xml源代码：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".BmiresultActivity">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.4" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline19"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.3" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline23"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.35" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline22"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.15" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline14"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.55" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline15"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.6" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline16"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.65" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline24"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.7" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.8" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline18"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.85" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline20"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.95" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline21"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="1.0" />
<ImageView
android:id="@+id/imageView3"
android:layout_width="100dp"
android:layout_height="100dp"
android:contentDescription="@string/todo1"
app:layout_constraintBottom_toTopOf="@+id/guideline14"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline8"
app:srcCompat="@drawable/kizai" />
<TextView
android:id="@+id/tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-black"
android:text="@string/name"
android:textAlignment="center"
android:textSize="14sp"
app:layout_constraintBottom_toTopOf="@+id/guideline15"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline14"
app:layout_constraintVertical_bias="0.545" />
<TextView
android:id="@+id/tv_phone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-black"
android:text="@string/phone"
android:textAlignment="center"
android:textSize="14sp"
app:layout_constraintBottom_toTopOf="@+id/guideline16"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline15" />
<RatingBar
android:id="@+id/ratingBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="@+id/guideline20"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline18" />
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-black"
android:text="@string/pj"
android:textSize="14sp"
app:layout_constraintBottom_toTopOf="@+id/guideline18"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.491"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline17"
app:layout_constraintVertical_bias="0.6" />
<ImageView
android:id="@+id/imageView4"
android:layout_width="100dp"
android:layout_height="100dp"
app:layout_constraintBottom_toTopOf="@+id/guideline19"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.491"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline22"
app:srcCompat="@drawable/bmi"
android:contentDescription="@string/todo3" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/krona_one"
android:text="@string/appname"
android:textSize="18sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/guideline23"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline19" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/krona_one"
android:text="@string/version"
app:layout_constraintBottom_toTopOf="@+id/guideline8"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline23" />
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-black"
android:text="@string/mail"
app:layout_constraintBottom_toTopOf="@+id/guideline24"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline16" />
<Button
android:id="@+id/btn_updata"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:fontFamily="sans-serif-black"
android:text="@string/button_updata"
android:textAlignment="center"
app:layout_constraintBottom_toTopOf="@+id/guideline17"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline24" />
<TextView
android:id="@+id/textView10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/archivo_black"
android:text="@string/cc3"
android:textColor="#A8A5A5"
android:textSize="8sp"
app:layout_constraintBottom_toTopOf="@+id/guideline21"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.517"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline20"
tools:text="@string/cc" />
</androidx.constraintlayout.widget.ConstraintLayout>
（5）、自定义Toast
图5-Toast样式
Diy_toast.xml源代码：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivity">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.5" />
<ImageView
android:id="@+id/imageView"
android:layout_width="385dp"
android:layout_height="73dp"
android:contentDescription="@string/todo1"
app:layout_constraintBottom_toTopOf="@+id/guideline8"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline8"
app:layout_constraintVertical_bias="0.505"
app:srcCompat="@drawable/kizaitoast1" />
<TextView
android:id="@+id/tv_toast"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-black"
android:text="@string/diy_display"
android:textColor="@color/colorPrimary"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
二、 第三方框架：
（1）、Gifimages动态图片显示框架
1、首先在build.grade(Project)中添加：
buildscript {
repositories {
mavenCentral()
}
}
allprojects {
repositories {
mavenCentral()
}
}
2、然后在build.grade(Modules)中添加：
dependencies {
implementation 'pl.droidsonroids.gif:android-gif-drawable:1.2.19'
}
3、使用直接用gifimageView.setImageResource(地址)；
gifImageView.setImageResource(R.drawable.fp);
（2）、Toast第三方样式
1、首先在build.grade(Project)中添加：
allprojects {
repositories {
maven { url 'https://jitpack.io' }
}
}
2、然后在build.grade(Modules)中添加：
dependencies {
implementation 'com.github.Zzzia:ToastEx:1.0.1'
}
3、使用方法：ToastFx.error(content,”内容”).show();
例如：
ToastEx.error(MainActivity.this,"体重不能为0").show();
##第一界面
一、 逻辑代码：
（1）、MainActivity.java源代码：
package com.example.bmitest;
import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RatingBar;
import android.widget.TextView;
import android.widget.Toast;
import com.zia.toastex.ToastEx;
import com.zia.toastex.anim.ToastImage;
import com.zia.toastex.anim.ToastText;
public class MainActivity extends AppCompatActivity {
private EditText et_height, et_weight;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//绑定控件
et_height = findViewById(R.id.editText);
et_weight = findViewById(R.id.editText2);
Button btn_submit = findViewById(R.id.button);
ImageView back = findViewById(R.id.imageView);
final ImageView sex_show = findViewById(R.id.imageView2);
RadioButton rtn_m = findViewById(R.id.radioButton);
final RadioButton rtn_w = findViewById(R.id.radioButton2);
//内部匿名类
//开始计算
btn_submit.setOnClickListener(new View.OnClickListener() {
@SuppressLint("SetTextI18n")
public void onClick(View v) {
//让它输入只能是数字键盘，但是测试无效
/* et_height.setInputType(EditorInfo.TYPE_CLASS_NUMBER);
et_weight.setInputType(EditorInfo.TYPE_CLASS_NUMBER);*/
//获取身高、体重文本
String height = et_height.getText().toString().trim();
String weight = et_weight.getText().toString().trim();
//初始化身高、体重、结果
double res = 0, heightNum = 0, weightNum = 0;
//定义性别为男
String bmisex = getString(R.string.callman);
//判断性别女按钮点击事件
//如果点击赋值为美铝
if (rtn_w.isChecked()) {
bmisex = getString(R.string.callwoman);
sex_show.setImageResource(R.drawable.lady);
} else {
bmisex = getString(R.string.callman);
sex_show.setImageResource(R.drawable.men);
}
//判断输入身高、体重不为空
if (!height.isEmpty() && !weight.isEmpty()) {
//转换为小数
heightNum = Double.parseDouble(height);
weightNum = Double.parseDouble(weight);
//判断身高输入是否为0
if (heightNum == 0) {
//定义一个带图片的Toast,一定要改成getApplicationContext()在
@SuppressLint("ShowToast") Toast toastH = Toast.makeText(getApplicationContext(), R.string.toast_zero, Toast.LENGTH_SHORT);//身高为除数不能为0
toastH.setGravity(Gravity.CENTER, 0, 0);
LinearLayout linearLayout = (LinearLayout) toastH.getView();
ImageView imageView = new ImageView(getApplicationContext());
imageView.setImageResource(R.drawable.ic_close_black_24dp);
linearLayout.addView(imageView, 0);
toastH.show();
} else {
//判断体重输入是否为0
if (weightNum == 0) {
//默认
// Toast.makeText(getApplicationContext(), R.string.toast_zero1, Toast.LENGTH_SHORT).show();//体重不能为
ToastEx.error(MainActivity.this,"体重不能为0").show();//使用Toast插件实现
} else {
res = (weightNum * 10000) / (heightNum * heightNum);//BMI计算公式：体重/身高^2，因为原单位是M，单位改成cm之后放大10000倍
res = (double) Math.round(res * 10) / 10;//保留一位小数
Intent intent = new Intent(MainActivity.this, BmiresultActivity.class);
intent.putExtra("weiNum", weightNum);//传输身高
intent.putExtra("heiNum", heightNum);//传输体重
intent.putExtra("bmiValue", res);//传输BMI结果
intent.putExtra("bmisex", bmisex);//传输性别
startActivity(intent);
}
}
} else
mToast();//用自己自定义的Toast警告
// Toast.makeText(MainActivity.this, R.string.toast_warming, Toast.LENGTH_SHORT).show();//警告提示
}
});
//关于BMI指数
Button btn_BMI = findViewById(R.id.btn_BMI);
btn_BMI.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setMessageDiaolog();
}
});
//关于作者
Button btn_kizai = findViewById(R.id.btn_kizai);
btn_kizai.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setView();
}
});
//退出程序的按钮
back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
}
//创建dialog提示框
private void setMessageDiaolog() {
//创建构建器
android.app.AlertDialog.Builder builder = new AlertDialog.Builder(this);
//设置参数
builder.setTitle("什么是BMI").setIcon(R.drawable.bmi)
.setMessage(R.string.adout_bmi)
.setPositiveButton("关闭", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast toast = Toast.makeText(getApplicationContext(), "感谢查看", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.BOTTOM, 0, 0);
LinearLayout linearLayout = (LinearLayout) toast.getView();
ImageView imageView = new ImageView(getApplicationContext());
imageView.setImageResource(R.drawable.ic_sentiment_very_satisfied_black_24dp);
linearLayout.addView(imageView, 0);
toast.show();
}
});
builder.create().show();
}
//创建setView()设置对话框为自定义View
private void setView() {
//创建对话框构建器
AlertDialog.Builder builder = new AlertDialog.Builder(this);
//获取布局
View view = View.inflate(MainActivity.this, R.layout.aboutme, null);
//获取布局中的控件一定要加上view（view.findViewById），不然会闪退
//更新按钮
final Button btn_updata = view.findViewById(R.id.btn_updata);
btn_updata.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ToastEx.warning(MainActivity.this,"已经是最新版本").show();
// Toast.makeText(getApplicationContext(), R.string.updata, Toast.LENGTH_SHORT).show();
}
});
//打分控件
final RatingBar ratingBar = view.findViewById(R.id.ratingBar);
ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
@Override
public void onRatingChanged(RatingBar ratingBar, float v, boolean b) {
//改变Toast位置
Toast toast = Toast.makeText(getApplicationContext(), String.valueOf(v) + "星评价", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.TOP, 0, 200);
toast.show();
}
});
//设置参数
builder.setTitle(R.string.adoutBMI).setView(view)
.setPositiveButton("关闭", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//定义一个带图片的Toast
Toast toast = Toast.makeText(MainActivity.this, "感谢查看与评价", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.BOTTOM, 0, 0);
LinearLayout linearLayout = (LinearLayout) toast.getView();
ImageView imageView = new ImageView(getApplicationContext());
imageView.setImageResource(R.drawable.ic_mood_black_24dp);
linearLayout.addView(imageView, 0);
toast.show();
}
});
//创建对话框
builder.create().show();//不能少这句
}
//定义一个完全自定义的mToast
private void mToast() {
//创建构建器
LayoutInflater mlif = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
//绑定自定义的布局界面
assert mlif != null;
@SuppressLint("InflateParams") View view = mlif.inflate(R.layout.diy_toast, null);
//绑定控件
TextView tv_toast = view.findViewById(R.id.tv_toast);
SpannableString ss = new SpannableString("非法输入！请重新输入！");
//改变字体颜色
ss.setSpan(new ForegroundColorSpan(Color.BLUE), 0, 4, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
ss.setSpan(new ForegroundColorSpan(Color.RED), 5, 11, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
//显示文字
tv_toast.setText(ss);
Toast myToast = new Toast(this);
myToast.setView(view);
myToast.setGravity(Gravity.CENTER, 0, 0);
myToast.show();//不能少这个
}
}
##第二界面源代码
（2）、BmiresultActivity.java源代码：
package com.example.bmitest;
import androidx.appcompat.app.AppCompatActivity;
import pl.droidsonroids.gif.GifImageView;
import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.zia.toastex.ToastEx;
public class BmiresultActivity extends AppCompatActivity {
@SuppressLint("SetTextI18n")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bmiresult);
Button button = findViewById(R.id.button2);
TextView textView = findViewById(R.id.textView);
GifImageView gifImageView = findViewById(R.id.gifimage_show);
Intent intent = getIntent();
TextView textView1 = findViewById(R.id.textView2);
//运动建议
Button btn_sport = findViewById(R.id.btn_sport);
btn_sport.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sportDialog();
}
});
//不服，再测一下
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(BmiresultActivity.this, MainActivity.class);
startActivity(i);
}
});
//接收身高体重
double hei = intent.getDoubleExtra("heiNum", 0.0);//身高
double wei = intent.getDoubleExtra("weiNum", 0.0);//体重
//传递BMI的数值进行判断
double Bmi = intent.getDoubleExtra("bmiValue", 0.0);//接收bmi值
String sex = intent.getStringExtra("bmisex");//接收性别
String advice = "";
//进行比较得出结论
if (Bmi <= 18.4) {
advice = getString(R.string.thin);
gifImageView.setImageResource(R.drawable.ps);
} else if (Bmi >= 18.5 && Bmi <= 23.9) {
advice = getString(R.string.slim);
gifImageView.setImageResource(R.drawable.zc);
} else if (Bmi >= 24 && Bmi <= 27.9) {
advice = getString(R.string.fat);
gifImageView.setImageResource(R.drawable.sr);
} else if (Bmi >= 28 && Bmi <= 39) {
advice = getString(R.string.fater);
gifImageView.setImageResource(R.drawable.fp);
} else if (Bmi >= 40) {
advice = getString(R.string.fatest);
gifImageView.setImageResource(R.drawable.gz);
}
textView.setText(sex + ",您的BMI值是：" + Bmi + "," + advice);
textView1.setText("您的身高：" + hei + "cm" + "\n您的体重：" + wei + "kg" + "\n测试结果如下");
setTitle("测试结果");
}
//运动建议的dialog
private void sportDialog() {
final TextView tv_sport = (TextView) findViewById(R.id.tv_sport);
final String[] sports = new String[]{"篮球", "跑步", "爬山", "游泳", "不想运动"};
//创建构建器
final AlertDialog.Builder builder = new AlertDialog.Builder(BmiresultActivity.this);
//设置参数
builder.setIcon(R.drawable.ic_motorcycle_black_24dp).setTitle("请选择你喜欢的运动")
.setSingleChoiceItems(sports, 0, new DialogInterface.OnClickListener() {
@SuppressLint("SetTextI18n")
@Override
public void onClick(DialogInterface dialog, int which) {
//选择什么显示什么
ToastEx.success(BmiresultActivity.this, sports[which]).show();
switch (sports[which]) {
case "篮球":
tv_sport.setText("你选择的是:" + sports[which] + "\n打篮球的好处："+"\n打篮球可以增强体内营养物质的消耗，使整个肌体的代谢能力增强，进而提高食欲。另外，还会促进胃肠蠕动和消化液分泌，改善肝脏和胰腺的功能，" +
"从而使整个消化系统的功能得到提高，为人的健康和长寿提供良好的物质d保证。");
break;
case "跑步":
tv_sport.setText("你选择的是:" + sports[which] + "\n跑步的好处：" + "\n经常跑步可以增强人体的柔韧度，保护心脏，通过跑步增强了人体各部位的抗损伤能力，同时提高供血量，对心脏大脑的健康都有好处，" +
"可以缓解疲劳、消除紧张感、消除焦虑，抑郁的情绪，通过锻炼，人的精神可以得到振奋，心情会更加的开朗，对学习，工作都有一定好处。");
break;
case "爬山":
tv_sport.setText("你选择的是:" + sports[which] + "\n爬山的好处：" + "\n减肥最基本的道理是消耗的热量大于吸收的热量，运动是人体最主要的能量消耗渠道，但并不是说参加什么运动都可以取得良好减肥作用。理想的减肥运动方式是强度较低的运动，" +
"由于供氧充分，持续时间长，总的能量消耗多。爬山正是这样一种运动强度适宜，持续时间较长的运动方式，因而具有独到的减肥效果。");
break;
case "游泳":
tv_sport.setText("你选择的是:" + sports[which] + "\n游泳的好处：" + "\n1、健身的作用。游泳是一项比较消耗体力的活动，它能够提高身体的体能，长期游泳可以使自己保持很好的体力。2、有减肥的作用。游泳，它的体力消耗量比较大，" +
"可以消耗我们体内的脂肪，能够通过游泳来进行塑身、减肥。");
break;
case "不想运动":
tv_sport.setText("你选择的是:" + sports[which] + "\n不想运动的后果：" + "\n世界卫生组织最新统计数字表明，每年全球有两百万人死于“身体缺乏活动”，所以，为了自己，也为爱你的人和你爱的人，赶快运动起来，哪怕是最简单的步行!不要为了便捷而放弃健康，放弃生命｡");
break;
}
}
}).setPositiveButton("确定", new DialogInterface.OnClickListener() {
@SuppressLint("SetTextI18n")
@Override
public void onClick(DialogInterface dialog, int which) {
/*switch (sports[which]) {
case "篮球":
tv_sport.setText("你选择的是:" + sports[which] + "\n打篮球的好处：\n"+R.string.bask);
break;
case "跑步":
tv_sport.setText("你选择的是:" + sports[which] + "\n跑步的好处：\n" + R.string.run);
break;
case "爬山":
tv_sport.setText("你选择的是:" + sports[which] + "\n爬山的好处：\n" + R.string.shan);
break;
case "游泳":
tv_sport.setText("你选择的是:" + sports[which] + "\n游泳的好处：\n" + R.string.swing);
break;
case "不想运动":
tv_sport.setText("你选择的是:" + sports[which] + "\n不想运动的后果：\n" + R.string.nosport);
break;
}*/
}
}).setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
builder.create().dismiss();//关闭
}
});
builder.create().show();
}
}
#演示效果
本项目已经开源：
有能力的可以自己升级一下。
https://github.com/Kizai/BMItest.git