Android开发入门——Button绑定监听事件三种方式

import android.app.Activity;

import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;

public class AActivity extends Activity { /** Called when the activity is first created. */

EditText Ev1;

@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);

Ev1 = (EditText)findViewById(R.id.editText1);

//第一种方式 Button Btn1 = (Button)findViewById(R.id.button1);//获取按钮资源 Btn1.setOnClickListener(new Button.OnClickListener(){//创建监听 public void onClick(View v) { String strTmp = "点击Button01"; Ev1.setText(strTmp); }

});

//第二种方式 Button Btn2 = (Button) findViewById(R.id.button2);//获取按钮资源 Btn2.setOnClickListener(listener);//设置监听

}

Button.OnClickListener listener = new Button.OnClickListener(){//创建监听对象 public void onClick(View v){ String strTmp="点击Button02"; Ev1.setText(strTmp); }

};

//第三种方式 public void Btn3OnClick(View view){ String strTmp="点击Button03"; Ev1.setText(strTmp);

} }

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" >

<TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" />

<Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button1" />

<Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button2" /> <Button android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button3" android:onClick="Btn3OnClick"/>

<EditText android:id="@+id/editText1" android:layout_width="match_parent" android:layout_height="wrap_content" >

<requestFocus /> </EditText>

</LinearLayout>

 

转载于:https://www.cnblogs.com/wuditju/p/4337662.html