我没有在按钮上使用任何ID,只是提到按钮的onClick proprty,在我的MainActivity.java中,我提到了onClick属性的参数,即" CLICK"但它不起作用。有解决方案吗 `
public void onclick(View v){
Button button= (Button) v;
number+= button.getText().toString();
display.setText(number);
rSet1= Double.parseDouble(number);
}`
这是layout.xml
<?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"
tools:context="com.daman.calculator.MainActivity">
<TextView
android:layout_width="349dp"
android:layout_height="81dp"
android:text="0"
android:textSize="40sp"
android:background="@color/Textview"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.514"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.037"
android:id="@+id/textView" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="1"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.027"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.402" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="2"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.305"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.402" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="3"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.583"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.402" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="4"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.027"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.595" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="5"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.305"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.595" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="6"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.583"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.595" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="7"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.027"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.787" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="8"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.305"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.787" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="9"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.583"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.787" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="0"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.305"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.98" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="onClick"
android:text="."
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.027"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.98" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="operation"
android:text="+"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.972"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.402" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="operation"
android:text="-"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.972"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.595" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="operation"
android:text="*"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.972"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.787" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="operation"
android:text="/"
android:textColor="@color/colorButtonText"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.972"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.98" />
<Button
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorButton"
android:onClick="calculate"
android:text="="
android:textColor="@color/DeleteButton"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.583"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.98" />
<Button
android:onClick="delete"
android:layout_width="238dp"
android:layout_height="55dp"
android:text="Delete"
android:textColor="@color/colorButtonText"
android:background="@color/DeleteButton"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginBottom="8dp"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="8dp"
app:layout_constraintVertical_bias="0.225"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintHorizontal_bias="0.061" />
<Button
android:onClick="clear"
android:layout_width="83dp"
android:layout_height="54dp"
android:text="Clear"
android:textColor="@color/colorButtonText"
android:background="@color/ClearButton"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginBottom="8dp"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="8dp"
app:layout_constraintVertical_bias="0.224"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintHorizontal_bias="0.971" />
</android.support.constraint.ConstraintLayout>
答案 0 :(得分:0)
onClick方法应该在XML和java中具有相同的名称,即:
public void onClick(View v){
Button button= (Button) v;
number+= button.getText().toString();
display.setText(number);
rSet1= Double.parseDouble(number);
}