Android NewEditText类

最新推荐文章于 2024-08-15 15:04:15 发布

转载最新推荐文章于 2024-08-15 15:04:15 发布 · 828 阅读

本文介绍了一种自定义Android EditText控件的方法，通过监听文本变化来显示或隐藏删除按钮，并实现了点击按钮清空输入的功能。

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package com.joyee.neweid.jbpay;

import com.joyee.neweid.R;

import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.EditText;

public class NewEditText extends EditText{
private Drawable img_disable;
private Drawable img_able;
private Context mContext;

public NewEditText(Context context, AttributeSet attrs, int defStyle)
{
  super(context, attrs, defStyle);
  mContext=context;
  init();
}

public NewEditText(Context context, AttributeSet attrs)
{
  super(context, attrs);
  mContext=context;
  init();
}

public NewEditText(Context context)
{
  super(context);
  mContext=context;
  init();
}

public void init()
{
  img_disable = mContext.getResources().getDrawable(R.drawable.delete_gray_jbpay);
  img_able = mContext.getResources().getDrawable(R.drawable.delete_jbpay);
  addTextChangedListener(new TextWatcher()
  {
   @Override
   public void onTextChanged(CharSequence s, int start, int before, int count) {
   }

   @Override
   public void beforeTextChanged(CharSequence s, int start, int count, int after) {
   }

   @Override
   public void afterTextChanged(Editable s) {
          setDrawable();
   }
  });
  setDrawable();
}


public void setDrawable()
{
  if(length() < 1)
   setCompoundDrawablesWithIntrinsicBounds(null, null, img_disable, null);
  else
   setCompoundDrawablesWithIntrinsicBounds(null, null, img_able, null);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
  if (img_able != null && event.getAction() == MotionEvent.ACTION_UP)
  {
   int eventX = (int) event.getRawX();
   int eventY = (int) event.getRawY();
   Rect rect = new Rect();
   getGlobalVisibleRect(rect);
   rect.left=rect.right-50;
   if(rect.contains(eventX, eventY))
    setText("");
  }
  return super.onTouchEvent(event);
}

@Override
protected void finalize() throws Throwable {
super.finalize();
}

}