【Android】触发按钮的三种方式

概述方法1通过id绑定点击监听实现findViewById(R.id.home_button).setOnClickListener(newView.OnClickListener(){@OverridepublicvoidonClick(Viewv){Toast.makeText(MainActivity.this,"点击按钮",Toast.LENGTH_LONG).show(); 方法1 通过ID绑定点击监听实现

findVIEwByID(R.ID.home_button).setonClickListener(    new VIEw.OnClickListener() {        @OverrIDe        public voID onClick(VIEw v) {            Toast.makeText(MainActivity.this, "点击按钮", Toast.LENGTH_LONG).show();        }    });

源码app/src/main/java/com/yyshu/demo1/MainActivity.java

package com.yyshu.demo1;import androIDx.appcompat.app.AppCompatActivity;import androID.os.Bundle;import androID.vIEw.VIEw;import androID.Widget.Toast;public class MainActivity extends AppCompatActivity {    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        findVIEwByID(R.ID.home_button).setonClickListener(                new VIEw.OnClickListener() {                    @OverrIDe                    public voID onClick(VIEw v) {                        Toast.makeText(MainActivity.this, "点击按钮", Toast.LENGTH_LONG).show();                    }                }        );    }}

方法2 通过androID:onClick绑定

注：需要xml视图层增加androID:onClick="button_test1"

public voID button_test1(VIEw vIEw) {    Toast.makeText(MainActivity.this, "点击按钮2", Toast.LENGTH_LONG).show();}

方法3 继承VIEw.OnClickListener，所有按钮通过onClick触发

注：需要implements VIEw.OnClickListener继承

package com.yyshu.demo1;import androIDx.appcompat.app.AppCompatActivity;import androID.os.Bundle;import androID.vIEw.VIEw;import androID.Widget.button;import androID.Widget.Toast;public class MainActivity extends AppCompatActivity implements VIEw.OnClickListener {    private button mbutton;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        mbutton = (button) findVIEwByID(R.ID.home_button);        mbutton.setonClickListener(this);    }    public voID onClick(VIEw v) {        switch (v.getID()) {            case R.ID.home_button:                Toast.makeText(MainActivity.this, "点击按钮3", Toast.LENGTH_LONG).show();                break;        }    }}

视图UI层app/src/main/res/layout/activity_main.xml

<?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">    <TextVIEw        androID:ID="@+ID/home_Title"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:layout_margintop="16dp"        androID:text="@string/home_Title"        app:layout_constraintBottom_toBottomOf="parent"        app:layout_constraintEnd_toEndOf="parent"        app:layout_constraintStart_toStartOf="parent"        app:layout_constrainttop_totopOf="parent"        app:layout_constraintVertical_bias="0.0" />    <button        androID:ID="@+ID/home_button"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:layout_margintop="16dp"        androID:text="@string/home_bitton"        app:layout_constraintBottom_toBottomOf="parent"        app:layout_constraintEnd_toEndOf="parent"        app:layout_constraintStart_toStartOf="parent"        app:layout_constrainttop_toBottomOf="@+ID/home_Title"        app:layout_constraintVertical_bias="0.0" /></androIDx.constraintlayout.Widget.ConstraintLayout>

app/src/main/res/values/strings.xml

<resources>    <string name="app_name">DEMO1</string>    <string name="home_Title">你好世界！</string>    <string name="home_bitton">按钮</string></resources>

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