简单扫一扫功能的实现

第一步：下载libZing,并把这个文件导入到你的工程里，然后实现和新建的项目的关联。

第二步：在新建的项目里编写实现代码

@Override
    public void onClick(View v){
        switch(v.getId()){
            //扫一扫按钮
            case R.id.bt_search:
                 Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
                 startActivityForResult(intent,0);
            break;
            //生成二维码的按钮
            case R.id.bt_switch:
                //得到要编码的字符串input
                String input = et_shuru.getText().toString();
                if(input.equals("")){
                    Toast.makeText(MainActivity.this,"输入不能为空", Toast.LENGTH_SHORT).show();
                }else {
                    //调用用EncodingUtils.createQRCode方法得到编码后的案
                    Bitmap bitmap = EncodingUtils.createQRCode(input, 500, 500,
                            checkBox.isChecked()?
                                    BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher):null);
                    im_image.setImageBitmap(bitmap);
                }
            break;
        }
    }
   
    //得到扫码返回的结果
    @Override
    protected void onActivityResult(int requestCode,int resultCode,Intent data){
        super.onActivityResult(requestCode,resultCode,data);
        //由CaptureActivity类中可得Intent的返回结果的返回吗是RESULT_OK
        if(resultCode == RESULT_OK){
            Bundle bundle = data.getExtras();
            String result = bundle.getString("result");
            tv_show.setText(result);
        }
    }

具体参见：http://www.imooc.com/video/11674