安卓app_sl3.13xml按钮 onClick属性指定对应的方法与java事件监听器的方法

图像按钮android:onClick="myClick"对应MainActivity.java的myClick方法，点击按钮显示toast提示消息后自动消失

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
   
    tools:context="com.example.sl3_13.MainActivity" >

    <Button
        android:id="@+id/login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="登录" />

    <ImageButton
        android:id="@+id/imageButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="myClick"
        
        android:src="@android:drawable/btn_star" />

</LinearLayout>

package com.example.sl3_13;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
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 login=(Button)findViewById(R.id.login);
        login.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                // TODO 自动生成的方法存根
                Toast toast=Toast.makeText(MainActivity.this, "您点击了普通按钮",Toast.LENGTH_SHORT);
                toast.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.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();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
    public void myClick(View view)
    {
        Toast toast=Toast.makeText(MainActivity.this, "您点击了图片按钮",Toast.LENGTH_SHORT);
        toast.show();
    }
}