4.4 我同意条款—CheckBox的isCheck属性

4.4 我同意条款—CheckBox的isCheck属性

目录

4.4 我同意条款—CheckBox的isCheck属性... 1

目标: 1

方法: 1

代码: 1

效果: 4

 

目标:只有同意了使用条款才能进入界面.

方法:CheckBox的isCheck方法 和 Button的seEnabled方法结合使用.

代码:

package edu.cquptzx.CheckBox;

 

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.TextView;

import android.widget.Toast;

 

public class CheckBoxActivity extends Activity

{

    /** Called when the activity is first created. */

    private TextView tv;

    private CheckBox cb;

    private Button btn;

    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

       

        //取得对象ID.

        tv = (TextView)findViewById(R.id.textView);

        cb = (CheckBox) findViewById(R.id.checkBox);

        btn = (Button) findViewById(R.id.button);

       

        //初始化按钮和选项状态

        cb.setChecked(false);

        btn.setEnabled(false);

       

        //为选项添加监听器

        cb.setOnClickListener(new CheckBox.OnClickListener()

            {

              public void onClick(View v)

              {  

                  //如果不同意条款,那么确定按钮不可选中.

                  if(cb.isChecked() == true)

                  {

                     btn.setEnabled(true);

                  }

                  else

                  {

                     btn.setEnabled(false);  

                     new AlertDialog.Builder(CheckBoxActivity.this)

                     .setTitle("注意")

                     .setMessage("只有同意了条款才能进入应用!")

                     .setPositiveButton("返回同意",

                         new DialogInterface.OnClickListener()

                         {                   

                            public void onClick(DialogInterface dialog, int which)

                            {

                                tv.setText(getString(R.string.item).toString());

                            }

                         })

                     .setNegativeButton("我要退出",

                         new DialogInterface.OnClickListener()

                         {                   

                            public void onClick(DialogInterface dialog, int which)

                            {

                                Toast.makeText(CheckBoxActivity.this, "退出应用中", Toast.LENGTH_LONG).show();

                                finish();

                            }                       

                         })

                     .show();         

                    

                  }

                 

              }  

            });

       

        btn.setOnClickListener(new Button.OnClickListener()

            {

              public void onClick(View v)

              {

                     tv.setText("您已经同意了条款,下面进入应用.");     

                     //doThings Next

              }          

            });

    }  

}

效果:

For more questions , contacts me by :

cquptzx@qq.com or  cquptzx@outlook.com