Android OnFocuChangeListener焦点事件详解

本文实例为大家分享了android onfocuchangelistener焦点事件的具体代码，供大家参考，具体内容如下

界面

打开“res/layout/activity_main.xml”文件。

<linearlayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical" >

  <edittext
    android:id="@+id/mobile"
    android:layout_width="190dp"
    android:layout_height="wrap_content"
    android:text="手机号码" />

  <edittext
    android:id="@+id/address"
    android:layout_width="190dp"
    android:layout_height="wrap_content"
    android:text="地址" />

</linearlayout>

mainactivity.java

package com.example.whaletosea.application04;

import android.os.bundle;
import android.app.activity;
import android.view.view;
import android.widget.edittext;
import android.view.view.onclicklistener;
import android.view.view.onfocuschangelistener;
import android.widget.toast;

public class mainactivity extends activity {
  //声明 edittext
  private edittext etmobile=null;
  private edittext etaddress=null;
  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);
    //获取edittext
    etmobile = (edittext) super.findviewbyid(r.id.mobile);
    etaddress = (edittext) super.findviewbyid(r.id.address);
    //注册onclick onfocuschange监听器
    etmobile.setonclicklistener(new mobileonclicklistener());
    etmobile.setonfocuschangelistener(new mobileonfocuschanagelistener());
    etaddress.setonclicklistener(new addressonclicklistener());
    etaddress.setonfocuschangelistener(new addressonfocuschanagelistener());
  }
  //mobileonclicklistener单击监听器
   private class mobileonclicklistener implements onclicklistener{
    @override
    public void onclick(view view ){
      etmobile.settext("");
    }
  }
  //mobileonfocuschanagelistener焦点监听器
  private class mobileonfocuschanagelistener implements onfocuschangelistener{
    @override
    public void onfocuschange(view view ,boolean hasfocus){
      if(view.getid()==etmobile.getid())
        toast.maketext(getapplicationcontext(),"手机文本框获得焦点！",toast.length_long).show();

    }
  }
  //addressonclicklistener单击监听器
  private class addressonclicklistener implements onclicklistener{
    @override
    public void onclick(view view){
      etaddress.settext("");
    }
  }
  //mobileonfocuschanagelistener焦点监听器
  private class addressonfocuschanagelistener implements onfocuschangelistener{
    @override
    public void onfocuschange(view view,boolean hasfocus){
      if(view.getid()==etaddress.getid())
        toast.maketext(getapplicationcontext(), "地址文本框获得焦点！",toast.length_long).show();
    }
}

效果图：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。