Android之二维码扫描的总结

   

    

     

      

     
     

      

       package com.example.qr_codescan;  
      
     
    

     

      

     
     

      
  
      
     
    

     

      

     
     

      
  
      
     
    

     

      

     
     

      

       import android.app.Activity;  
      
     
    

     

      

     
     

      

       import android.content.Intent;  
      
     
    

     

      

     
     

      

       import android.graphics.Bitmap;  
      
     
    

     

      

     
     

      

       import android.os.Bundle;  
      
     
    

     

      

     
     

      

       import android.view.View;  
      
     
    

     

      

     
     

      

       import android.view.View.OnClickListener;  
      
     
    

     

      

     
     

      

       import android.widget.Button;  
      
     
    

     

      

     
     

      

       import android.widget.ImageView;  
      
     
    

     

      

     
     

      

       import android.widget.TextView;  
      
     
    

     

      

     
     

      
  
      
     
    

     

      

     
     

      

       public class MainActivity extends Activity {  
      
     
    

     

      

     
     

      

        private final static int SCANNIN_GREQUEST_CODE = 1;  
      
     
    

     

      

     
     

      

        /** 
      
     
    

     

      

     
     

      

        * 显示扫描结果 
      
     
    

     

      

     
     

      

        */  
      
     
    

     

      

     
     

      

        private TextView mTextView ;  
      
     
    

     

      

     
     

      

        /** 
      
     
    

     

      

     
     

      

        * 显示扫描拍的图片 
      
     
    

     

      

     
     

      

        */  
      
     
    

     

      

     
     

      

        private ImageView mImageView;  
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      
  
      
     
    

     

      

     
     

      

        @Override  
      
     
    

     

      

     
     

      

        protected void onCreate(Bundle sa