<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=http://schemas.android.com/apk/res/android"
  android:orientation="horizontal"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
 <ImageView
 android:id="@+id/iv"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_gravity="center_vertical"
   android:paddingLeft="10.0dip"
   android:paddingTop="10.0dip"
   android:paddingBottom="10.0dip"
   />
 <TextView
 android:id="@+id/tv"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:textColor="#ffffff"
   android:layout_marginLeft="8dip"
   android:layout_gravity="center_vertical"
   android:paddingLeft="5.0dip"
   android:paddingTop="10.0dip"
   android:paddingBottom="10.0dip"
   android:paddingRight="10.0dip"
   android:textSize="18.0sp"
   />
</LinearLayout>

package com.szy.customview;
import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class CustomButton extends LinearLayout
{
 private ImageView iv;
 private TextView tv;
 public CustomButton(Context context)
 {
 this(context, null);
 }
 public CustomButton(Context context, AttributeSet attrs)
 {
 super(context, attrs);
 // 导入布局
 LayoutInflater.from(context).inflate(R.layout.custom_button, this, true);
 iv = (ImageView) findViewById(R.id.iv);
 tv = (TextView) findViewById(R.id.tv);
 }
 /**
 * 设置图片资源
 */
 public void setImageResource(int resId)
 {
 iv.setImageResource(resId);
 }
 /**
 * 设置显示的文字
 */
 public void setTextViewText(String text)
 {
 tv.setText(text);
 }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical"
 >
 <com.szy.customview.CustomButton
   android:id="@+id/bt_confirm"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:background="@drawable/button_bg"
   />
 <com.szy.customview.CustomButton
   android:id="@+id/bt_cancel"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:background="@drawable/button_bg"
  />
</LinearLayout>

package com.szy.customview;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class MainActivity extends Activity
{
 private CustomButton btnConfirm;
 private CustomButton btnCancel;
 @Override
 public void onCreate(Bundle savedInstanceState)
 {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 btnConfirm = (CustomButton) findViewById(R.id.bt_confirm);
 btnCancel = (CustomButton) findViewById(R.id.bt_cancel);
 btnConfirm.setTextViewText("确定");
 btnConfirm.setImageResource(R.drawable.confirm);
 btnCancel.setTextViewText("取消");
 btnCancel.setImageResource(R.drawable.cancel);
 btnConfirm.setOnClickListener(new OnClickListener()
 {
  @Override
  public void onClick(View v)
  {
  // 在这里可以实现点击事件
  }
 });
 }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
 <EditText
   android:id="@+id/et"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:singleLine="true"
   />
 <ImageButton
   android:id="@+id/ib"
   android:visibility="gone"
   android:src="@drawable/cancel"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:background="#00000000"
   android:layout_alignRight="@+id/et" />
</RelativeLayout>

package com.szy.customview;
import android.content.Context;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.LinearLayout;
public class CustomEditView extends LinearLayout implements EdtInterface
{
 ImageButton ib;
 EditText et;
 public CustomEditView(Context context)
 {
 super(context);
 }
 public CustomEditView(Context context, AttributeSet attrs)
 {
 super(context, attrs);
 LayoutInflater.from(context).inflate(R.layout.custom_editview, this, true);
 init();
 }
 private void init()
 {
 ib = (ImageButton) findViewById(R.id.ib);
 et = (EditText) findViewById(R.id.et);
 et.addTextChangedListener(tw);// 为输入框绑定一个监听文字变化的监听器
 // 添加按钮点击事件
 ib.setOnClickListener(new OnClickListener()
 {
  @Override
  public void onClick(View v)
  {
  hideBtn();// 隐藏按钮
  et.setText("");// 设置输入框内容为空
  }
 });
 }
 // 当输入框状态改变时，会调用相应的方法
 TextWatcher tw = new TextWatcher()
 {
 @Override
 public void onTextChanged(CharSequence s, int start, int before, int count)
 {
  // TODO Auto-generated method stub
 }
 @Override
 public void beforeTextChanged(CharSequence s, int start, int count, int after)
 {
  // TODO Auto-generated method stub
 }
 // 在文字改变后调用
 @Override
 public void afterTextChanged(Editable s)
 {
  if (s.length() == 0)
  {
  hideBtn();// 隐藏按钮
  } else
  {
  showBtn();// 显示按钮
  }
 }
 };
 @Override
 public void hideBtn()
 {
 // 设置按钮不可见
 if (ib.isShown())
  ib.setVisibility(View.GONE);
 }
 @Override
 public void showBtn()
 {
 // 设置按钮可见
 if (!ib.isShown())
 {
  ib.setVisibility(View.VISIBLE);
 }
 }
}
interface EdtInterface
{
 public void hideBtn();
 public void showBtn();
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical"
 >
 <com.szy.customview.CustomEditView
 android:layout_width="fill_parent"
   android:layout_height="wrap_content"
  />
</LinearLayout>