Android 带有删除按钮的EditText

概述MainActivity如下:packagecc.textview5;importandroid.os.Bundle;importandroid.text.TextUtils;importandroid.view.View;

MainActivity如下:

package cc.textvIEw5; import androID.os.Bundle; import androID.text.TextUtils; import androID.vIEw.VIEw; import androID.vIEw.VIEw.OnClickListener; import androID.Widget.button; import androID.Widget.Toast; import androID.app.Activity; /**  * Demo描述:  * 自定义控件实现带清除功能的EditText  *  * 学习资料:  * http://blog.csdn.net/xiaanming/article/details/11066685  *  * Thank you very much  */ public class MainActivity extends Activity {   private CleanableEditText mUsernameCleanableEditText;   private CleanableEditText mPassWordCleanableEditText;   private button mLoginbutton;   @OverrIDe   protected voID onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentVIEw(R.layout.main);     init();   }      private voID init(){     mUsernameCleanableEditText=(CleanableEditText) findVIEwByID(R.ID.usernameEditText);     mPassWordCleanableEditText=(CleanableEditText) findVIEwByID(R.ID.passwordEditText);     mLoginbutton=(button) findVIEwByID(R.ID.loginbutton);     mLoginbutton.setonClickListener(new OnClickListenerImpl());   }      private class OnClickListenerImpl implements OnClickListener {     @OverrIDe     public voID onClick(VIEw vIEw) {       if (TextUtils.isEmpty(mUsernameCleanableEditText.getText())) {         mUsernameCleanableEditText.setShakeAnimation();         Toast.makeText(MainActivity.this,"请输入用户名",Toast.LENGTH_SHORT).show();       }        if (TextUtils.isEmpty(mPassWordCleanableEditText.getText())) {         mPassWordCleanableEditText.setShakeAnimation();         Toast.makeText(MainActivity.this,"请输入密码",Toast.LENGTH_SHORT).show();       }     }    }     } 

CleanableEditText如下:

package cc.textvIEw5;  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; /**  * 在焦点变化时和输入内容发生变化时均要判断是否显示右边clean图标  */ public class CleanableEditText extends EditText {   private Drawable mRightDrawable;   private boolean isHasFocus;      public CleanableEditText(Context context) {     super(context);     init();   }   public CleanableEditText(Context context,AttributeSet attrs) {     super(context,attrs);     init();   }    public CleanableEditText(Context context,AttributeSet attrs,int defStyle) {     super(context,attrs,defStyle);     init();   }      private voID init(){     //getCompoundDrawables:     //Returns drawables for the left,top,right,and bottom borders.     Drawable [] drawables=this.getCompoundDrawables();          //取得right位置的Drawable     //即我们在布局文件中设置的androID:drawableRight     mRightDrawable=drawables[2];            //设置焦点变化的监听     this.setonFocuschangelistener(new FocuschangelistenerImpl());     //设置EditText文字变化的监听     this.addTextChangedListener(new TextWatcherImpl());     //初始化时让右边clean图标不可见     setClearDrawableVisible(false);   }         /**    * 当手指抬起的位置在clean的图标的区域    * 我们将此视为进行清除 *** 作    * getWIDth():得到控件的宽度    * event.getX():抬起时的坐标(改坐标是相对于控件本身而言的)    * getTotalpaddingRight():clean的图标左边缘至控件右边缘的距离    * getpaddingRight():clean的图标右边缘至控件右边缘的距离    * 于是:    * getWIDth() - getTotalpaddingRight()表示:    * 控件左边到clean的图标左边缘的区域    * getWIDth() - getpaddingRight()表示:    * 控件左边到clean的图标右边缘的区域    * 所以这两者之间的区域刚好是clean的图标的区域    */   @OverrIDe   public boolean ontouchEvent(MotionEvent event) {     switch (event.getAction()) {     case MotionEvent.ACTION_UP:              boolean isClean =(event.getX() > (getWIDth() - getTotalpaddingRight()))&&                (event.getX() < (getWIDth() - getpaddingRight()));       if (isClean) {         setText("");       }       break;      default:       break;     }     return super.ontouchEvent(event);   }      private class FocuschangelistenerImpl implements OnFocuschangelistener{     @OverrIDe     public voID onFocusChange(VIEw v,boolean hasFocus) {        isHasFocus=hasFocus;        if (isHasFocus) {          boolean isVisible=getText().toString().length()>=1;          setClearDrawableVisible(isVisible);       } else {          setClearDrawableVisible(false);       }     }        }      //当输入结束后判断是否显示右边clean的图标   private class TextWatcherImpl implements TextWatcher{     @OverrIDe     public voID afterTextChanged(Editable s) {        boolean isVisible=getText().toString().length()>=1;        setClearDrawableVisible(isVisible);     }      @OverrIDe     public voID beforeTextChanged(CharSequence s,int start,int count,int after) {            }      @OverrIDe     public voID onTextChanged(CharSequence s,int before,int count) {            }        }        //隐藏或者显示右边clean的图标   protected voID setClearDrawableVisible(boolean isVisible) {     Drawable rightDrawable;     if (isVisible) {       rightDrawable = mRightDrawable;     } else {       rightDrawable = null;     }     //使用代码设置该控件left,and bottom处的图标     setCompoundDrawables(getCompoundDrawables()[0],getCompoundDrawables()[1],rightDrawable,getCompoundDrawables()[3]);   }     // 显示一个动画,以提示用户输入   public voID setShakeAnimation() {     this.setAnimation(shakeAnimation(5));   }    //CycleTimes动画重复的次数   public Animation shakeAnimation(int CycleTimes) {     Animation translateAnimation = new TranslateAnimation(0,10,10);     translateAnimation.setInterpolator(new CycleInterpolator(CycleTimes));     translateAnimation.setDuration(1000);     return translateAnimation;   }  } 

main.xml如下:

<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:paddingleft="20dip"   androID:paddingRight="20dip"   >    <cc.textvIEw5.CleanableEditText     androID:ID="@+ID/usernameEditText"     androID:layout_wIDth="fill_parent"     androID:layout_height="wrap_content"     androID:hint="username"     androID:layout_margintop="30dip"     androID:drawableleft="@drawable/icon_user"     androID:drawableRight="@drawable/clean_selector"      />       <cc.textvIEw5.CleanableEditText     androID:ID="@+ID/passwordEditText"     androID:layout_wIDth="fill_parent"     androID:layout_height="wrap_content"     androID:hint="password"     androID:password="true"     androID:layout_margintop="100dip"     androID:drawableleft="@drawable/account_icon"     androID:drawableRight="@drawable/clean_selector"      />        <button      androID:ID="@+ID/loginbutton"     androID:layout_wIDth="fill_parent"     androID:layout_height="wrap_content"     androID:text="Login"     androID:layout_margintop="155dip"      />  </relativeLayout> 

以上就是对AndroID   带有删除按钮的EditText的资料整理，后续继续补充相关资料，谢谢大家对本站的支持！

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