實現編輯文字(EditText)的清除按鈕

實例:

package com.AndroidEditText;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class AndroidEditTextActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        final EditText input = (EditText)findViewById(R.id.input);
        Button buttonClear = (Button)findViewById(R.id.clear);
        buttonClear.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    input.setText("");
   }});

    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<RelativeLayout 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content">
<Button
 android:id="@+id/clear"
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"
    android:hint="CLEAR" 
    android:layout_alignParentRight="true"/>
<EditText  
 android:id="@+id/input"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content"
    android:hint="請輸入" 
    android:layout_alignParentLeft="true"
    android:layout_toLeftOf="@id/clear"/>

</RelativeLayout>
</LinearLayout>