三个Button onClick 事件

package com.dream.dream;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        Button btn1 = (Button)findViewById(R.id.nm_button);
        Button btn2 = (Button)findViewById(R.id.wb_button);
        //匿名内部类
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this,getString(R.string.message_nm),Toast.LENGTH_SHORT).show();
            }
        });
        //外部类
        btn2.setOnClickListener(new myOnClickListener(){
            @Override
            public void onClick(View v) {
                Log.i("tag", "我是外部类的内部方法");
                //调用父类方法
                super.onClick(v);
            }
        });

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public void happy_message(View view) {
        Toast.makeText(this, R.string.toast_happy_button,Toast.LENGTH_SHORT).show();
    }

    private class myOnClickListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            Toast.makeText(MainActivity.this,"我是外部类",Toast.LENGTH_SHORT).show();
        }
    }
}

<?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"
    android:orientation="vertical"
    android:paddingTop="90dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    tools:context="com.dream.dream.MainActivity"
    tools:showIn="@layout/activity_main">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/text_view" />
    <Button
        android:id="@+id/happy_button"
        android:text="@string/happy_button"
        android:onClick="happy_message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
      <Button
          android:id="@+id/nm_button"
          android:text="@string/nm_button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" />
      <Button
          android:id="@+id/wb_button"
          android:text="@string/wb_button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" />
</LinearLayout>

 

package com.dream.dream;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

Button btn1 = (Button)findViewById(R.id.nm_button);
Button btn2 = (Button)findViewById(R.id.wb_button);
//匿名内部类
btn1.setOnClickListener(new View.OnClickListener() {
            @Override
public void onClick(View v) {
                Toast.makeText(MainActivity.this,getString(R.string.message_nm),Toast.LENGTH_SHORT).show();
}
        });
//外部类
btn2.setOnClickListener(new myOnClickListener(){
            @Override
public void onClick(View v) {
                Log.i("tag", "我是外部类的内部方法");
//调用父类方法
super.onClick(v);
}
        });

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
            @Override
public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
}
        });
}

    @Override
public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
}

    @Override
public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();

//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
            return true;
}

        return super.onOptionsItemSelected(item);
}

    public void happy_message(View view) {
        Toast.makeText(this, R.string.toast_happy_button,Toast.LENGTH_SHORT).show();
}

    private class myOnClickListener implements View.OnClickListener {
        @Override
public void onClick(View v) {
            Toast.makeText(MainActivity.this,"我是外部类",Toast.LENGTH_SHORT).show();
}
    }
}