3.19 全屏幕以按钮重写

3.19 全屏幕以按钮重写

动态产生按钮并最大化  

问题1:

问题2:

package edu.cquptzx.FullScreenButton;

 

import android.app.Activity;

import android.app.ProgressDialog;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

 

publicclass FullScreenButtonActivity extends Activity

{

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

    public ProgressDialog pd = null;

    @Override

    publicvoid onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState); 

       

        /* Here we didn't use the main.xlm layout.Instead,we use a button as a layout add to the Activity.*/

        /*这里我们不使用main.xml的布局,而是将按钮作为布局添加到活动中去.*/

        //setContentView(R.layout.main);

       

        Button btn =  new Button(this);

        this.setContentView(btn);

        btn.setText(R.string.btn_text);

        btn.setOnClickListener(

        new  Button.OnClickListener()

            {

                @Override

                publicvoid onClick(View v)

                {

                    CharSequence strDialogTitle = getString(R.string.strDialogTitle);

                    CharSequence strDialogBody = getString(R.string.strDialogBody);

                   

                /* 下面的方法的第一参数为context,

                 * 此处的context 要保证你的上下文要为activity对象，

                 * 只有activity才能添加ProgressDialog窗体，

                 * 为了确保正确，context可以使用activity.this表示，

                 * 不要一味地写成getApplicationContext()*/

                /* 下面的种写法只有第一种正确.*/

                pd = ProgressDialog.show(FullScreenButtonActivity.this, strDialogTitle , strDialogBody,true);

 

                // pd = ProgressDialog.show(getApplicationContext(), strDialogTitle , strDialogBody,true);

                   

                //pd = ProgressDialog.show(getBaseContext(), strDialogTitle , strDialogBody,true);

                    new Thread()

                    {

                       publicvoid run()

                       {

                           try

                           {

                              sleep(3000);

                           }

                           catch( Exception e)

                           {

                              e.printStackTrace();

                           }

                           finally

                           {

                              pd.dismiss();

                           }                

                       }

                    }.start();

                }

            }

            );

       }

}