Android checkbox及动态加载控件

1.动态加载布局
（1）使用LayoutInflater：
LinearLayout linearLayout = (LinearLayout) getLayoutInflater().inflate(R.layout.main, null);返回的是main文件的root。

向获取到的linearLayout中添加控件使用其父类的方法addView(...);

（2）使用View的静态方法inflate(...)：
LinearLayout togLayout = (LinearLayout)View.inflate(Main.this, R.layout.togglebutton, linearLayout);

public static View inflate(Context context,
int resource,
ViewGroup root)
Inflate a view from an XML resource. This convenience method wraps the LayoutInflater class, which provides a full range of options for view inflation.
参数：
context - The Context object for your activity or application.
resource - The resource ID to inflate
root - A view group that will be the parent. Used to properly inflate the layout_* parameters.
2.checkBox多选框
（1）private List<CheckBox> checkBoxs = new ArrayList<CheckBox>();

（2）String[] checkboxText = new String[] { "您是学生吗？", "是否喜欢android？","您喜欢旅游吗？", "打算出国吗？" };

（3）获取xml文件中的checkBox控件：CheckBox checkBox = (CheckBox) getLayoutInflater().inflate(R.layout.checkbox, null);

（4）在for循环中为每一个checkbox控件添加属性，再将该控件添加到checkBoxes中 checkBoxs.add(checkBox); checkBoxs.get(i).setText(checkboxText[i]);

（5）向布局文件中添加checkBox：linearLayout.addView(checkBox, i);

3.代码实现
（1）main.xml布局文件
<?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">
   <Button android:id="@+id/button" android:layout_width="fill_parent"
       android:layout_height="wrap_content" android:text="确定" />
</LinearLayout>
（2）checkbox.xml布局文件
<?xml version="1.0" encoding="utf-8"?>
<CheckBox xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="fill_parent" android:id="@+id/checkbox"
   android:layout_height="wrap_content">
</CheckBox>
（3）togglebutton布局文件
<?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">
   <ToggleButton android:id="@+id/toggleButton1"
       android:layout_width="wrap_content" android:layout_height="wrap_content"
       android:checked="true" android:textOff="横向排列" android:textOn="纵向排列" />

   <LinearLayout android:id="@+id/lLayout"
       android:layout_width="match_parent" android:layout_height="wrap_content"
       android:orientation="vertical">

       <Button android:id="@+id/button1" android:layout_width="wrap_content"
           android:layout_height="wrap_content" android:text="Button" />

       <Button android:id="@+id/button2" android:layout_width="wrap_content"
           android:layout_height="wrap_content" android:text="Button" />

       <Button android:id="@+id/button3" android:layout_width="wrap_content"
           android:layout_height="wrap_content" android:text="Button" />
   </LinearLayout>
</LinearLayout>
（4）java代码
package com.android.mycheckbox;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.LinearLayout;
import android.widget.ToggleButton;

public class Main extends Activity implements OnClickListener {
   /** Called when the activity is first created. */
   private List<CheckBox> checkBoxs = new ArrayList<CheckBox>();
   private ToggleButton toggleButton;
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       // setContentView(R.layout.main);
       String[] checkboxText = new String[] { "您是学生吗？", "是否喜欢android？",
               "您喜欢旅游吗？", "打算出国吗？" };
       // 动态加载布局
       LinearLayout linearLayout = (LinearLayout) getLayoutInflater().inflate(
               R.layout.main, null);
       // 给指定的checkbox赋值
       for (int i = 0; i < checkboxText.length; i++) {
           // 先获得checkbox.xml的对象
           CheckBox checkBox = (CheckBox) getLayoutInflater().inflate(
                   R.layout.checkbox, null);
           checkBoxs.add(checkBox);
           checkBoxs.get(i).setText(checkboxText[i]);
           // 实现了在
           linearLayout.addView(checkBox, i);
       }
       LinearLayout togLayout = (LinearLayout)View.inflate(Main.this, R.layout.togglebutton, linearLayout);
       toggleButton = (ToggleButton)togLayout.findViewById(R.id.toggleButton1);
       final LinearLayout buttonLayout = (LinearLayout)togLayout.findViewById(R.id.lLayout);
       toggleButton.setOnCheckedChangeListener(new OnCheckedChangeListener(){

           @Override
           public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
               // TODO Auto-generated method stub
               if(arg1){
   //设置垂直布局
                   buttonLayout.setOrientation(1);
   }else{
   //设置水平布局
       buttonLayout.setOrientation(0);
   }
           }

       });

       setContentView(linearLayout);
       Button button = (Button) this.findViewById(R.id.button);
       button.setOnClickListener(this);
   }

   @Override
   public void onClick(View v) {
       // TODO Auto-generated method stub
       String s = "";
       for (CheckBox checkBox : checkBoxs) {
           if (checkBox.isChecked()) {
               s += checkBox.getText() + "\n";
           }
       }
       if ("".equals(s)) {
           s = "您还没有选中选项！！";
       }
       // 使用一个提示框来提示用户的信息
       new AlertDialog.Builder(this).setMessage(s)
               .setPositiveButton("关闭", null).show();
   }
}

4.运行结果

来源：CSDN

作者：让想法变成执行力

链接：https://blog.csdn.net/u010227042/article/details/104348520

标签

android

android动态加载