android学习之4种点击事件的响应方式

如题，下面就一一列出对点击事件响应的4种方式：

第一种：内部类的形式：

package com.example.dail;import android.net.Uri;import android.os.Bundle;import android.renderscript.Int2;import android.text.TextUtils;import android.app.Activity;import android.content.Intent;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener {	private Button bt_dail = null;	private EditText et_number = null;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		bt_dail = (Button) findViewById(R.id.bt_dail);		et_number = (EditText) findViewById(R.id.et_number);		bt_dail.setOnClickListener(new MyListener());	}	private void callPhone() {		String number = et_number.getText().toString();		if(TextUtils.isEmpty(number)) {			Toast.makeText(MainActivity.this, "号码不能为空", 1).show();		}		Intent intent = new Intent();		intent.setAction(Intent.ACTION_CALL);		intent.setData(Uri.parse("tel:"+number));		startActivity(intent);	}	private class MyListener implements OnClickListener{		@Override		public void onClick(View v) {			// TODO Auto-generated method stub			callPhone();		}			}}

第二种：匿名内部类：

package com.example.dail;import android.net.Uri;import android.os.Bundle;import android.renderscript.Int2;import android.text.TextUtils;import android.app.Activity;import android.content.Intent;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener {	private Button bt_dail = null;	private EditText et_number = null;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		bt_dail = (Button) findViewById(R.id.bt_dail);		et_number = (EditText) findViewById(R.id.et_number);		bt_dail.setOnClickListener(new OnClickListener(){			public void onClick(View v){				callPhone();			}		});	}	private void callPhone() {		String number = et_number.getText().toString();		if(TextUtils.isEmpty(number)) {			Toast.makeText(MainActivity.this, "号码不能为空", 1).show();		}		Intent intent = new Intent();		intent.setAction(Intent.ACTION_CALL);		intent.setData(Uri.parse("tel:"+number));		startActivity(intent);	}}

"

然后再主类里面实现btOnClick方法，

private void btOnClick() {		callPhone();}private void callPhone() {		String number = et_number.getText().toString();		if(TextUtils.isEmpty(number)) {			Toast.makeText(MainActivity.this, "号码不能为空", 1).show();		}		Intent intent = new Intent();		intent.setAction(Intent.ACTION_CALL);		intent.setData(Uri.parse("tel:"+number));		startActivity(intent);}

第四种：让主类实现OnClickListener接口，然后再主类实现未实现的方法

package com.example.dail;import android.net.Uri;import android.os.Bundle;import android.renderscript.Int2;import android.text.TextUtils;import android.app.Activity;import android.content.Intent;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener {	private Button bt_dail = null;	private EditText et_number = null;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		bt_dail = (Button) findViewById(R.id.bt_dail);		et_number = (EditText) findViewById(R.id.et_number);		bt_dail.setOnClickListener(this);	}	private void callPhone() {		String number = et_number.getText().toString();		if(TextUtils.isEmpty(number)) {			Toast.makeText(MainActivity.this, "号码不能为空", 1).show();		}		Intent intent = new Intent();		intent.setAction(Intent.ACTION_CALL);		intent.setData(Uri.parse("tel:"+number));		startActivity(intent);	}	@Override	public void onClick(View v) {		callPhone();			}}