点击事件OnClickListener接口重写onClick方法实现

爱被打了一巴掌 2022-05-22 06:10 263阅读 0赞

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OnClickListener接口重写onClick方法

XML：

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout 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"
        android:orientation="vertical"
        >
    
        <Button
            android:id="@+id/btn1"
            android:layout_width="100dp"
            android:layout_height="40dp"
            android:text="点击1"
            />
    
    </LinearLayout>

Java:

package com.example.zy.mystudy;
    
    import android.app.Activity;
    import android.content.DialogInterface;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.Toast;
    
    public class MainActivity extends Activity implements View.OnClickListener {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Button button = (Button)findViewById(R.id.btn1);
            button.setOnClickListener(this);
        }
    
        @Override
        public void onClick(View view) {
            Toast.makeText(MainActivity.this,"接口OnClickListener",Toast.LENGTH_SHORT).show();
        }
    }

你也可以这样写java：

package com.example.zy.mystudy;
    
    import android.app.Activity;
    import android.content.DialogInterface;
    import android.net.sip.SipSession;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.Toast;
    
    public class MainActivity extends Activity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Button button = (Button)findViewById(R.id.btn1);
            button.setOnClickListener(new Listener());
        }
    
        class Listener implements View.OnClickListener{
    
            @Override
            public void onClick(View view) {
                Toast.makeText(MainActivity.this,"OnClickListener接口实现",Toast.LENGTH_SHORT).show();
            }
        }
    }

-- [快速实例化控件方法][Link 1] --

\-- [ButterKnife实例化控件方法][ButterKnife] --

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[csdn]: https://blog.csdn.net/qq_40881680/article/details/82226562
[Link 1]: https://blog.csdn.net/qq_40881680/article/details/82012180
[ButterKnife]: https://blog.csdn.net/qq_40881680/article/details/82892694