Android 实现监听的四种方法详解实例代码

直接上代码，大家可以参考下

（1）自身类作为事件监听器

package cn.edu.gdmec.s07150745.work5;

import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.view.view;
import android.widget.button;
import android.widget.toast;

public class mainactivity extends appcompatactivity implements view.onclicklistener{

@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
button btn1 = (button) findviewbyid(r.id.btn1);
btn1.settext("单击");
btn1.setonclicklistener(this);
}

@override
public void onclick(view v) {
toast.maketext(this,"已单击我...",toast.length_short).show();
system.out.println("已单击我...");
}
}

 

（2）外部类作为事件监听器：

package cn.edu.gdmec.s07150745.work5;

import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.view.view;
import android.widget.button;

public class act2 extends appcompatactivity {

@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_act2);
button btn2 = (button) findviewbyid(r.id.btn2);
btn2.settext("单击");
btn2.setonclicklistener(new outerclass("已单击我..."));
}
}
class outerclass implements view.onclicklistener{
private string str="已单击我....";
public outerclass(string str){
super();
this.str=str;
}
@override
public void onclick(view v) {
system.out.println(str);
}
}

（3）内部类作为事件监听器：

package cn.edu.gdmec.s07150745.work5;

import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.view.view;
import android.widget.button;
import android.widget.toast;

public class act3 extends appcompatactivity {

@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_act3);
button btn3 = (button) findviewbyid(r.id.btn3);
btn3.settext("单击");
btn3.setonclicklistener(new outerclass());
}
class outerclass implements view.onclicklistener{

@override
public void onclick(view v) {
toast.maketext(act3.this,"已单击我...",toast.length_short).show();
system.out.println("已单击我...");
}
}
}

 （4）匿名类作为事件监听器：

package cn.edu.gdmec.s07150745.work5;

import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.view.view;
import android.widget.button;
import android.widget.toast;

public class act4 extends appcompatactivity {

@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_act4);
button btn4 = (button) findviewbyid(r.id.btn4);
btn4.settext("单击");
btn4.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
toast.maketext(act4.this,"已单击我...",toast.length_short).show();
system.out.println("已单击我...");
}
});
}
}

 

以上四种方法之后，在xml文件中给每一个事件即activity里面定义多一个android label即可。不忘在每个activity里面添加如下蓝色的一段代码哦。

<activity android:name=".mainactivity" android:label="1">
<intent-filter>
<action android:name="android.intent.action.main" />

<category android:name="android.intent.category.launcher" />
</intent-filter>
</activity>

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