android中如何删除布局中的控件

内容来自：http://zhidao.baidu.com/question/274313012.html

直接给你上代码吧，写了我半个小时，经过了我的测试了的~运行下就能看到结果了~关键的remove的时候有给你写注释~布局的layout文件内容：----------------------------------------------------------------------------------<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/linearlayout"><LinearLayout android:id="@+id/LinearLayout01" android:layout_width="wrap_content" android:layout_height="wrap_content"> <Button android:layout_height="wrap_content" android:id="@+id/add"  android:text="Add" android:layout_width="100px"></Button> <Button android:layout_height="wrap_content"  android:layout_width="100px" android:text="Remove" android:id="@+id/remove"></Button></LinearLayout><TextView android:id="@+id/TextView01" android:text="This is textView." android:layout_width="fill_parent" android:gravity="center" android:layout_height="50px"></TextView></LinearLayout>----------------------------------------------------------------------------------对应Activity的内容：----------------------------------------------------------------------------------package com.foxconn.dialog;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup.LayoutParams;import android.widget.Button;import android.widget.LinearLayout;public class DialogTest extends Activity implements OnClickListener {    private Button add_btn, remove_btn;    private LinearLayout linearLayout;    private int index = 0;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        findViews();        register();    }    private void register() {        add_btn.setOnClickListener(this);        remove_btn.setOnClickListener(this);    }    private void findViews() {        add_btn = (Button) findViewById(R.id.add);        remove_btn = (Button) findViewById(R.id.remove);        linearLayout = (LinearLayout) findViewById(R.id.linearlayout);    }    protected View createView() {        Button btn = new Button(this);        btn.setId(index++);        btn.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));        btn.setText("aaaaaa" + index);        return btn;    }    private void removeView() {        //获取linearlayout子view的个数        int count = linearLayout.getChildCount();        //研究整个LAYOUT布局，第0位的是含add和remove两个button的layout        //第count-1个是那个文字被置中的textview        //因此，在remove的时候，只能操作的是0<location<count-1这个范围的        //在执行每次remove时，我们从count-2的位置即textview上面的那个控件开始删除~        if (count - 2 > 0) {            //count-2>0用来判断当前linearlayout子view数多于2个，即还有我们点add增加的button            linearLayout.removeViewAt(count - 2);        }    }    public void onClick(View v) {        switch (v.getId()) {        case R.id.add:            linearLayout.addView(createView(), 1);            break;        case R.id.remove:            removeView();            break;        default:            break;        }    }}----------------------------------------------------------------------------------