android学习之4种点击事件的响应方式

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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;@Overrideprotected 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{@Overridepublic void onClick(View v) {// TODO Auto-generated method stubcallPhone();}}}

创建一个内部类MyListener实现OnClickListener接口。

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;@Overrideprotected 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);}}

第三种：在xml布局文件中，定义onclick的方式

<Button    android:onClick="btOnClick"    android:id="@+id/bt_dail"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_below="@id/et_number"    android:text="@string/dail"/>"

然后再主类里面实现btOnClick方法，

private void btOnClick(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);}

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;@Overrideprotected 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);}@Overridepublic void onClick(View v) {callPhone();}}

如上所述，4种点击事件的响应方式就是如此。

<pre code_snippet_id="103066" snippet_file_name="blog_20131208_4_3031669" name="code" class="java">

<pre code_snippet_id="103066" snippet_file_name="blog_20131208_5_5713865" name="code" class="java"><pre code_snippet_id="103066" snippet_file_name="blog_20131208_5_5713865" name="code" class="java"><pre code_snippet_id="103066" snippet_file_name="blog_20131208_5_5713865">