Android點擊Button按鈕的四種事件監聽方法總結

標籤：

首先我們在activity_main.xml裡面先定義一個Button空間

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<RelativeLayout 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"    tools:context=".MainActivity" >     <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:text="Button" /> </RelativeLayout>

好，現在要我們來看點擊事件的四種寫法：

1.最常見的一種寫法——匿名的內部類做為事件監聽器類

 

package com.basillee.blogdemo;import android.os.Bundle;import android.app.Activity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class MainActivity extends Activity {    private Button btnButton;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        btnButton=(Button)findViewById(R.id.button1);        btnButton.setOnClickListener(new OnClickListener() {            public void onClick(View arg0) {                Toast.makeText(MainActivity.this, "button clicked", Toast.LENGTH_LONG).show();            }        });    }}

 

 

2.內部類做為監聽器

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package com.basillee.blogdemo; import android.os.Bundle;import android.app.Activity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast; public class MainActivity extends Activity {     private Button btnButton;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        btnButton=(Button)findViewById(R.id.button1);        MyClicked myClicked=new MyClicked();        btnButton.setOnClickListener(myClicked);    }    private class MyClicked implements OnClickListener{         @Override        public void onClick(View arg0) {            Toast.makeText(getApplicationContext(), "Button clicked!", Toast.LENGTH_LONG).show();        }             }}

3.Activity直接實現OnClickListener介面

 

package com.basillee.blogdemo;

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

public class MainActivity extends Activity implements OnClickListener{

private Button btnButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnButton=(Button)findViewById(R.id.button1);
btnButton.setOnClickListener(this);
}
@Override
public void onClick(View arg0) {
Toast.makeText(this, "Button clicked!", Toast.LENGTH_LONG).show();
}

}

 

4.在布局檔案中，用android：onClick屬性指定對應的方法名實現

activity_main.xml代碼如下：

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<RelativeLayout 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"    tools:context=".MainActivity" >     <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:text="Button"        android:onClick="myClick"/> </RelativeLayout>

MainActivity.java代碼如下：

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package com.basillee.blogdemo; import android.os.Bundle;import android.app.Activity;import android.view.View;import android.widget.Toast; public class MainActivity extends Activity {     @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    public void myClick(View v){        Toast.makeText(getApplicationContext(),"Button clicked!", Toast.LENGTH_LONG).show();    }}

   轉自：http://www.cnblogs.com/BasilLee/p/4101284.html

Android點擊Button按鈕的四種事件監聽方法總結