Android開發：三種事件處理模型

 一·接口實現事件處理模型

public class MainActivity extends Activity implements OnClickListener
{
    private Button button1=null;
    private Button button2=null;
    private Button button3=null;
    private TextView text1=null;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main01);
        button1=(Button) findViewById(R.id.button1);
        button2=(Button) findViewById(R.id.button2);
        button3=(Button) findViewById(R.id.button3);
        text1= (TextView) findViewById(R.id.textView1);
        button1.setOnClickListener(this);
        button2.setOnClickListener(this);
        button3.setOnClickListener(this);


    }

    @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 void onClick(View v)
    {
        // TODO Auto-generated method stub
        switch (v.getId())
        {
        case R.id.button1:
            text1.setText("I am button one!");
            break;
        case R.id.button2:
            text1.setText("I am button two!");
            break;
        case R.id.button3:
            text1.setText("I am button three!");
            break;
        }

    }

}

二·內部類事件處理模型

 

public class MainActivity extends Activity
{
    private Button button1=null;
    private Button button2=null;
    private Button button3=null;
    private TextView text1=null;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main01);
        button1=(Button) findViewById(R.id.button1);
        button1.setOnClickListener(new Button1_OnClickListener() );
        button2=(Button) findViewById(R.id.button2);
        button2.setOnClickListener(new Button2_OnClickListener() );
        button3=(Button) findViewById(R.id.button3);
        button3.setOnClickListener(new Button3_OnClickListener() );
        text1=(TextView) findViewById(R.id.textView1);
    }
    class Button1_OnClickListener implements OnClickListener
    {

        @Override
        public void onClick(View arg0)
        {
            // TODO Auto-generated method stub
            text1.setText("I am the one!");

        }


    }
    class Button2_OnClickListener implements OnClickListener
    {

        @Override
        public void onClick(View arg0)
        {
            // TODO Auto-generated method stub
            text1.setText("I am the two!");

        }


    }
    class Button3_OnClickListener implements OnClickListener
    {

        @Override
        public void onClick(View arg0)
        {
            // TODO Auto-generated method stub
            text1.setText("I am the three!");

        }


    }

    @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;
    }

}

三·匿名類內部類處理模型

 

package com.exam.test003;



import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity
{
    private Button button1=null;
    private Button button2=null;
    private Button button3=null;
    private TextView text1=null;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main01);
        button1=(Button) findViewById(R.id.button1);
        button2=(Button) findViewById(R.id.button2);
        button3=(Button) findViewById(R.id.button3);
        text1= (TextView) findViewById(R.id.textView1);
        button1.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0)
            {
                // TODO Auto-generated method stub
                text1.setText("one");

            }});
        button2.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                text1.setText("two");

            }});
        button3.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0)
            {
                // TODO Auto-generated method stub
                text1.setText("three");

            }});
    }

    @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;
    }

}