自定义的Android EditText

  1 package cn.datian.customedit;
  2 
  3 import android.content.Context;
  4 import android.graphics.drawable.Drawable;
  5 import android.text.Editable;
  6 import android.text.TextWatcher;
  7 import android.util.AttributeSet;
  8 import android.view.MotionEvent;
  9 import android.view.View;
 10 import android.view.View.OnFocusChangeListener;
 11 import android.view.animation.Animation;
 12 import android.view.animation.CycleInterpolator;
 13 import android.view.animation.TranslateAnimation;
 14 import android.widget.EditText;
 15 
 16 public class ClearEditText extends EditText implements OnFocusChangeListener, TextWatcher {
 17     /**
 18      * 删除按钮的引用
 19      */
 20     private Drawable mClearDrawable;
 21 
 22     /**
 23      * 控件是否有焦点
 24      */
 25     private boolean hasFoucs;
 26 
 27     public ClearEditText(Context context) {
 28         this(context, null);
 29     }
 30 
 31     public ClearEditText(Context context, AttributeSet attrs) {
 32         // 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
 33         this(context, attrs, android.R.attr.editTextStyle);
 34     }
 35 
 36     public ClearEditText(Context context, AttributeSet attrs, int defStyle) {
 37         super(context, attrs, defStyle);
 38         init();
 39     }
 40 
 41     private void init() {
 42         // 获取EditText的DrawableRight,假如没有设置我们就使用默认的图片
 43         mClearDrawable = getCompoundDrawables()[2];
 44         if (mClearDrawable == null) {
 45             mClearDrawable = getResources().getDrawable(R.drawable.delete_selector);
 46         }
 47         mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(),
 48                 mClearDrawable.getIntrinsicHeight());
 49         // 默认设置隐藏图标
 50         setClearIconVisible(false);
 51         // 设置焦点改变的监听
 52         setOnFocusChangeListener(this);
 53         // 设置输入框里面内容发生改变的监听
 54         addTextChangedListener(this);
 55     }
 56 
 57     /**
 58      * 触摸事件，此方法的目的是给清除图标一个触摸事件（模拟点击事件），当触摸到清除图片的位置时，清除编辑框里面的内容
 59      * 捕获清除图标位置的代码：event.getX() > (getWidth() - getTotalPaddingRight())
 60      *                   && (event.getX() < ((getWidth() - getPaddingRight())))
 61      * 返回true表示触摸到清除图标，清除编辑框里面的内容，返回false则不处理。
 62      */
 63     @Override
 64     public boolean onTouchEvent(MotionEvent event) {
 65         if (event.getAction() == MotionEvent.ACTION_UP) {
 66             if (getCompoundDrawables()[2] != null) {
 67 
 68                 boolean touchable = event.getX() > (getWidth() - getTotalPaddingRight())
 69                         && (event.getX() < ((getWidth() - getPaddingRight())));
 70 
 71                 int r= getTotalPaddingRight();
 72                 int r2 = getPaddingRight();
 73                 if (touchable) {
 74                     this.setText("");
 75                 }
 76             }
 77         }
 78 
 79         return super.onTouchEvent(event);
 80     }
 81 
 82     /**
 83      * 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
 84      */
 85     @Override
 86     public void onFocusChange(View v, boolean hasFocus) {
 87         this.hasFoucs = hasFocus;
 88         if (hasFocus) {
 89             setClearIconVisible(getText().length() > 0);
 90         } else {
 91             setClearIconVisible(false);
 92         }
 93     }
 94 
 95     /**
 96      * 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去
 97      * 
 98      * @param visible
 99      */
100     protected void setClearIconVisible(boolean visible) {
101         Drawable right = visible ? mClearDrawable : null;
102         Drawable[] mDrawables = getCompoundDrawables();
103         setCompoundDrawables(mDrawables[0], mDrawables[1], right,
104                 mDrawables[3]);
105     }
106 
107     /**
108      * 当输入框里面内容发生变化的时候回调的方法
109      */
110     @Override
111     public void onTextChanged(CharSequence s, int start, int count, int after) {
112         if (hasFoucs) {
113             setClearIconVisible(s.length() > 0);
114         }
115     }
116 
117     /**
118      * 当输入框里面内容发生变化之前回调的方法
119      */
120     @Override
121     public void beforeTextChanged(CharSequence s, int start, int count, int after) {
122 
123     }
124 
125     /**
126      * 当输入框里面内容发生变化之后回调的方法
127      */
128     @Override
129     public void afterTextChanged(Editable s) {
130 
131     }
132 
133     /**
134      * 设置晃动动画
135      */
136     public void setShakeAnimation() {
137         this.setAnimation(shakeAnimation(5,300));
138     }
139 
140    /**
141     * 晃动动画
142     * @param counts  晃动次数  
143     * @param duration  晃动持续时间（毫秒）
144     * @return
145     */
146     private Animation shakeAnimation(int counts,int duration) {
147         Animation translateAnimation = new TranslateAnimation(-1, 1, -1, 1);
148         translateAnimation.setInterpolator(new CycleInterpolator(counts));
149         translateAnimation.setDuration(duration);
150         return translateAnimation;
151     }
152 }

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     tools:context=".MainActivity" 
 6     android:orientation="vertical"
 7     >
 8     <cn.datian.customedit.ClearEditText
 9         android:id="@+id/et"
10         android:layout_width="match_parent"
11         android:layout_height="wrap_content"
12          android:background="@drawable/login_edittext_bg"
13          android:drawableRight="@drawable/delete_selector"
14          android:singleLine="true" 
15         />
16     <Button
17         android:id="@+id/button1"
18         android:layout_width="wrap_content"
19         android:layout_height="wrap_content"
20         android:text="Button" />
21 
22 </LinearLayout>

1 <?xml version="1.0" encoding="utf-8"?>
2 <selector
3   xmlns:android="http://schemas.android.com/apk/res/android">
4     <item android:state_pressed="true" android:drawable="@drawable/search_clear_pressed" />
5     <item android:drawable="@drawable/search_clear_normal" />
6 </selector>

1 <?xml version="1.0" encoding="UTF-8"?>
2 <selector xmlns:android="http://schemas.android.com/apk/res/android">
3     <item android:state_focused="true" android:drawable="@drawable/login_edit_pressed"></item>
4     <item android:state_pressed="true" android:drawable="@drawable/login_edit_pressed"></item>
5     <item android:drawable="@drawable/login_edit_normal"></item>
6 </selector>

 1 package cn.datian.customedit;
 2 
 3 import android.os.Bundle;
 4 import android.app.Activity;
 5 import android.view.View;
 6 import android.widget.Button;
 7 import android.widget.Toast;
 8 
 9 public class MainActivity extends Activity {
10 
11     private ClearEditText et;
12     @Override
13     protected void onCreate(Bundle savedInstanceState) {
14         super.onCreate(savedInstanceState);
15         setContentView(R.layout.activity_main);
16         
17         Button btnLogin = (Button)this.findViewById(R.id.button1);
18         et = (ClearEditText)this.findViewById(R.id.et);
19         
20         btnLogin.setOnClickListener(new View.OnClickListener() {
21             
22             @Override
23             public void onClick(View v) {
24                 String etStr = et.getText().toString();
25                 if(etStr.equals("") || etStr==null){
26                     //如果编辑框为空的话，抖动提示
27                     et.setShakeAnimation();
28                     Toast.makeText(MainActivity.this, "不能为空", Toast.LENGTH_SHORT).show();
29                 }
30             }
31         });
32     }
33 }