本文为大家分享android登陆界面实现清除输入框内容和震动效果的全部代码,具体内容如下:
效果图:
主要代码如下
自定义的一个edittext,用于实现有文字的时候显示可以清楚的按钮:
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import android.content.context;
import android.graphics.drawable.drawable;
import android.text.editable;
import android.text.textwatcher;
import android.util.attributeset;
import android.view.motionevent;
import android.view.view;
import android.view.animation.animation;
import android.view.animation.cycleinterpolator;
import android.view.animation.translateanimation;
import android.widget.edittext;
public class clearedittext extends edittext implements view.onfocuschangelistener,textwatcher{
//删除按钮的引用
private drawable mcleardrawable;
//控件是否有焦点
private boolean hasfoucs;
public clearedittext(context context) {
this (context, null );
}
public clearedittext(context context, attributeset attrs) {
// 这里构造方法也很重要,不加这个很多属性不能再xml里面定义
this (context, attrs, android.r.attr.edittextstyle);
}
public clearedittext(context context, attributeset attrs, int defstyle) {
super (context, attrs, defstyle);
init();
}
private void init() {
//获取edittext的drawableright,假如没有设置我们就使用默认的图片
mcleardrawable = getcompounddrawables()[ 2 ];
if (mcleardrawable == null ) {
// throw new nullpointerexception("you can add drawableright attribute in xml");
mcleardrawable = getresources().getdrawable(r.drawable.selector_ic_delete);
}
//getintrinsicwidth()取得的是drawable在手机上的宽度,所以不同分辨率下获取到的值是不同的,关键所在处
mcleardrawable.setbounds( 0 , 0 , mcleardrawable.getintrinsicwidth(), mcleardrawable.getintrinsicheight());
//默认设置隐藏图标
setcleariconvisible( false );
//设置焦点改变的监听
setonfocuschangelistener( this );
//设置输入框里面内容发生改变的监听
addtextchangedlistener( this );
}
/**
* 因为我们不能直接给edittext设置点击事件,所以我们用记住我们按下的位置来模拟点击事件
* 当我们按下的位置 在 edittext的宽度 - 图标到控件右边的间距 - 图标的宽度 和
* edittext的宽度 - 图标到控件右边的间距之间我们就算点击了图标,竖直方向就没有考虑
*/
@override
public boolean ontouchevent(motionevent event) {
if (event.getaction() == motionevent.action_up) {
if (getcompounddrawables()[ 2 ] != null ) {
boolean touchable = event.getx() > (getwidth() - gettotalpaddingright())
&& (event.getx() < ((getwidth() - getpaddingright())));
if (touchable) {
this .settext( "" );
}
}
}
return super .ontouchevent(event);
}
/**
* 当clearedittext焦点发生变化的时候,判断里面字符串长度设置清除图标的显示与隐藏
*/
@override
public void onfocuschange(view v, boolean hasfocus) {
this .hasfoucs = hasfocus;
if (hasfocus) {
setcleariconvisible(gettext().length() > 0 );
} else {
setcleariconvisible( false );
}
}
/**
* 设置清除图标的显示与隐藏,调用setcompounddrawables为edittext绘制上去
* @param visible
*/
protected void setcleariconvisible( boolean visible) {
drawable right = visible ? mcleardrawable : null ;
setcompounddrawables(getcompounddrawables()[ 0 ],
getcompounddrawables()[ 1 ], right, getcompounddrawables()[ 3 ]);
}
/**
* 当输入框里面内容发生变化的时候回调的方法
*/
@override
public void ontextchanged(charsequence s, int start, int count, int after) {
if (hasfoucs){
setcleariconvisible(s.length() > 0 );
}
}
@override
public void beforetextchanged(charsequence s, int start, int count, int after) {
}
@override
public void aftertextchanged(editable s) {
}
/**
* 设置晃动动画
*/
public void setshakeanimation(){
this .setanimation(shakeanimation( 5 ));
}
/**
* 晃动动画
* @param counts 1秒钟晃动多少下
* @return
*/
public static animation shakeanimation( int counts){
animation translateanimation = new translateanimation( 0 , 10 , 0 , 0 );
translateanimation.setinterpolator( new cycleinterpolator(counts));
translateanimation.setduration( 1000 );
return translateanimation;
}
}
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mainactivity.java 主要是弹出一句话表示按钮的点击事件
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import android.os.bundle;
import android.view.view;
import android.widget.button;
import android.widget.toast;
import android.app.activity;
public class mainactivity extends activity {
private button btnlogin;
@override
protected void oncreate(bundle savedinstancestate) {
super .oncreate(savedinstancestate);
setcontentview(r.layout.activity_login);
btnlogin = (button) this .findviewbyid(r.id.btnlogin);
}
public void login(view view) {
toast.maketext( this , "登陆" , toast.length_long).show();
}
}
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布局文件如下:
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<?xml version= "1.0" encoding= "utf-8" ?>
<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android"
android:layout_width= "fill_parent"
android:layout_height= "fill_parent"
android:background= "#ffffffff"
android:orientation= "vertical"
android:padding= "4.0dip" >
<com.xuliugen.clearedittext.clearedittext
android:id= "@+id/etxtemail"
style= "@style/edittext"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:layout_margintop= "30.0dip"
android:drawableleft= "@drawable/icon_reg_name"
android:drawablepadding= "10.0dip"
android:hint= "使用邮箱登陆" />
<com.xuliugen.clearedittext.clearedittext
android:id= "@+id/etxtpwd"
style= "@style/edittext"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:layout_margintop= "20.0dip"
android:drawableleft= "@drawable/icon_reg_password"
android:drawablepadding= "10.0dip"
android:hint= "输入登陆密码"
android:inputtype= "textpassword" />
<button
android:id= "@+id/btnlogin"
style= "@style/biggreenbutton"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:layout_margintop= "20.0dip"
android:onclick= "login"
android:text= "登陆" />
</linearlayout>
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另外还有一些selector文件,图片资源等:
bg_btn_style_green.xml
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<?xml version= "1.0" encoding= "utf-8" ?>
<selector xmlns:android= "http://schemas.android.com/apk/res/android" >
<item android:state_enabled= "false" ><shape android:shape= "rectangle" >
<corners android:radius= "2.0dip" />
<solid android:color= "@color/green_btn_color_disable" />
</shape></item>
<item android:state_pressed= "true" ><shape android:shape= "rectangle" >
<corners android:radius= "2.0dip" />
<solid android:color= "@color/green_btn_color_pressed" />
</shape></item>
<item><shape android:shape= "rectangle" >
<corners android:radius= "2.0dip" />
<solid android:color= "@color/green_btn_color_normal" />
</shape></item>
</selector>
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bg_edittext_selector.xml
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<?xml version= "1.0" encoding= "utf-8" ?>
<selector xmlns:android= "http://schemas.android.com/apk/res/android" >
<item android:drawable= "@drawable/input_bar_bg_active" android:state_focused= "true" />
<item android:drawable= "@drawable/input_bar_bg_normal" />
</selector>
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以上就是本文的全部内容,希望对大家学习android软件编程有所帮助。