安卓开发之Button事件监听的几种类型
2016-06-21 21:40
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本人总结了Button按钮监听事件总共有四种类型,下面一一列举,以供大家参考
(1)采用匿名内部类方式
package com.example.day02_button2;
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.Toast;
public class MainActivity extends Activity {
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=(Button) findViewById(R.id.btn_id);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "点击", Toast.LENGTH_LONG).show();
}
});
}
}
(2)当前类继承Onclicklistenner,然后Button设置监听器
代码如下
package com.example.day02_button2;
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.Toast;
public class MainActivity extends Activity implements OnClickListener {
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=(Button) findViewById(R.id.btn_id);
btn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "点击", Toast.LENGTH_LONG).show();
}
}
(3)通过构造一个继承Oncliklistenner的类,然后在得到其对象,将对象传给监听器,样本代码如下
package com.example.day02_button2;
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.Toast;
public class MainActivity extends Activity {
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=(Button) findViewById(R.id.btn_id);
Mylistenner mylistenner=new Mylistenner();
btn.setOnClickListener(mylistenner);
}
class Mylistenner implements OnClickListener{
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "点击", Toast.LENGTH_LONG).show();
}
}
}
(4)在布局文件中,为Button设置Onclick属性,然后在java代码中创建相应方法
代码如下
布局文件
<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/acti
4000
vity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="@+id/btn_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="login"
/>
</RelativeLayout>
java代码
package com.example.day02_button2;
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.Toast;
public class MainActivity extends Activity {
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=(Button) findViewById(R.id.btn_id);
}
public void login(View v){
Toast.makeText(MainActivity.this, "点击", Toast.LENGTH_LONG).show();
}
}
(1)采用匿名内部类方式
package com.example.day02_button2;
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.Toast;
public class MainActivity extends Activity {
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=(Button) findViewById(R.id.btn_id);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "点击", Toast.LENGTH_LONG).show();
}
});
}
}
(2)当前类继承Onclicklistenner,然后Button设置监听器
代码如下
package com.example.day02_button2;
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.Toast;
public class MainActivity extends Activity implements OnClickListener {
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=(Button) findViewById(R.id.btn_id);
btn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "点击", Toast.LENGTH_LONG).show();
}
}
(3)通过构造一个继承Oncliklistenner的类,然后在得到其对象,将对象传给监听器,样本代码如下
package com.example.day02_button2;
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.Toast;
public class MainActivity extends Activity {
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=(Button) findViewById(R.id.btn_id);
Mylistenner mylistenner=new Mylistenner();
btn.setOnClickListener(mylistenner);
}
class Mylistenner implements OnClickListener{
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "点击", Toast.LENGTH_LONG).show();
}
}
}
(4)在布局文件中,为Button设置Onclick属性,然后在java代码中创建相应方法
代码如下
布局文件
<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/acti
4000
vity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="@+id/btn_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="login"
/>
</RelativeLayout>
java代码
package com.example.day02_button2;
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.Toast;
public class MainActivity extends Activity {
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=(Button) findViewById(R.id.btn_id);
}
public void login(View v){
Toast.makeText(MainActivity.this, "点击", Toast.LENGTH_LONG).show();
}
}
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