我正在创建具有选择的应用程序。我想知道单击了什么按钮,所以想更改单击的按钮的颜色,这是我的XML选择器代码。
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true"
android:color="#182f57"/> <!-- pressed -->
<item android:state_focused="true"
android:color="#4e8fcf"/> <!-- focused -->
<item android:color="#4e8fcf"/> <!-- default -->
</selector>
这是我的XML活动
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="#D6EAF8"
tools:context=".AssessmentActivity">
<TextView
android:id="@+id/question"
android:layout_width="373dp"
android:layout_height="132dp"
android:layout_marginTop="16dp"
android:gravity="center"
android:textColor="#000000"
android:textSize="22sp"
android:typeface="normal"
app:fontFamily="sans"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.421"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/none"
android:layout_width="189dp"
android:layout_height="51dp"
android:background="@drawable/clicked_button"
android:text=""
app:layout_constraintBottom_toTopOf="@+id/mild"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/results" />
<Button
android:id="@+id/mild"
android:layout_width="189dp"
android:layout_height="51dp"
android:background="#4e8fcf"
android:text=""
app:layout_constraintBottom_toTopOf="@+id/moderate"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/none" />
<Button
android:id="@+id/moderate"
android:layout_width="189dp"
android:layout_height="51dp"
android:background="#4e8fcf"
android:text=""
app:layout_constraintBottom_toTopOf="@+id/severe"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/mild" />
<Button
android:id="@+id/severe"
android:layout_width="189dp"
android:layout_height="51dp"
android:background="#4e8fcf"
android:text=""
app:layout_constraintBottom_toTopOf="@+id/very"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/moderate" />
<Button
android:id="@+id/very"
android:layout_width="189dp"
android:layout_height="51dp"
android:background="#4e8fcf"
android:text=""
app:layout_constraintBottom_toTopOf="@+id/btnresult"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/severe" />
<TextView
android:id="@+id/results"
android:layout_width="375dp"
android:layout_height="142dp"
android:gravity="center"
android:text=""
android:textColor="#000"
android:textSize="22sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/question"
app:layout_constraintVertical_bias="0.04" />
<Button
android:id="@+id/btnresult"
android:layout_width="88dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:background="#4e8fcf"
android:text="Result"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.071"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.973" />
<Button
android:id="@+id/back"
android:layout_width="88dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:background="#4e8fcf"
android:text="Menu"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.95"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.973" />
<TextView
android:id="@+id/usersname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#D6EAF8"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/moderate"
app:layout_constraintHorizontal_bias="0.296"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/results"
app:layout_constraintVertical_bias="0.959" />
</android.support.constraint.ConstraintLayout>
如您所见,我试图更改一个按钮。这行
android:background="@drawable/clicked_button"
这就是发生的事情
未设置按钮颜色。
答案 0 :(得分:0)
我像这样。
<Button
android:id="@+id/button_sign_in"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:background="@drawable/button_selector"
android:text="@string/button_sign_in"
android:textAllCaps="false"
android:textColor="@color/colorButtonText" />
制作一个新的可绘制资源文件。 例如:button_selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/colorPrimary" android:state_pressed="true" />
<item android:drawable="@color/colorAccent" android:state_focused="true" />
<item android:drawable="@color/colorPrimaryDark" />
</selector>
答案 1 :(得分:0)
在onclick方法中,可以通过以下方式设置按钮颜色
Button_ID.setBackgroundColor(Color.RED); // From android.graphics.Color
或
Button_ID.setBackgroundColor(0xFFFF0000); // 0xAARRGGBB