OnClickListener接口重写
<?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(); } } }