如何在android工作室中不使用其ID而对按钮执行操作？

时间：2017-03-19 17:22:59

标签： android

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＆＃34; CLICK＆＃34;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>

1 个答案:

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);

    }
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