2013年1月31日星期四
Android开发学习笔记:Button事件实现方法的总结
下面介绍Button事件实现的两种方法
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:id="@+id/myButton1"
android:text=" 按钮1 "
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/myButton2"
android:text=" 按钮2 "
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, ButtonDemoActivity!</string>
<string name="app_name">ButtonDemo</string>
</resources>
第一种:
ButtonDemoActivity.java
package com.android.ButtonDemo.activity;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class ButtonDemoActivity extends Activity {
Button myButton1,myButton2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myButton1=(Button)findViewById(R.id.myButton1);
myButton2=(Button)findViewById(R.id.myButton2);
//使用匿名类注册Button事件
myButton1.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Toast.makeText(ButtonDemoActivity.this, "你点击了按钮1",Toast.LENGTH_LONG).show();
}
});
myButton2.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Toast.makeText(ButtonDemoActivity.this, "你点击了按钮2",Toast.LENGTH_LONG).show();
}
});
}
}
第二种:
ButtonDemoActivity.java
package com.android.ButtonDemo.activity;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class ButtonDemoActivity extends Activity {
Button myButton1,myButton2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myButton1=(Button)findViewById(R.id.myButton1);
myButton2=(Button)findViewById(R.id.myButton2);
myButton1.setOnClickListener(new ButtonClick());
myButton2.setOnClickListener(new ButtonClick());
}
//创建一个类,来响应OnClickListener
class ButtonClick implements OnClickListener
{
public void onClick(View v)
{
switch (v.getId()) {
case R.id.myButton1:
Toast.makeText(ButtonDemoActivity.this, "你点击了按钮1",Toast.LENGTH_LONG).show();
break;
case R.id.myButton2:
Toast.makeText(ButtonDemoActivity.this, "你点击了按钮2",Toast.LENGTH_LONG).show();
break;
default:
break;
}
}
}
}
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