[转载]android 条码识别软件开发全解析(续1详解)

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MyTest extends Activity {
     /** Called when the activity is first created. */
    private TextView tv;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.mytest);

        tv=(TextView) findViewById(R.id.mytxt);
        findViewById(R.id.mybtn).setOnClickListener(listener);
    }
    public Button.OnClickListener listener=new Button.OnClickListener(){
        public void onClick(View v){

            Intent intent = new Intent("com.google.zxing.client.android.SCAN");//调用扫描的actity,这里其实只是转到刚才安装的BarcodeScanner3程序的中一个actity
            intent.putExtra("SCAN_MODE", "QR_CODE_MODE");//输入参数，（扫描类型，..二维码）
            startActivityForResult(intent, 0);//启动intent
        }
    };

    //扫描成功后回调函数，传回code 
    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
        if (requestCode == 0) {
            if (resultCode == RESULT_OK) {
                String contents = intent.getStringExtra("SCAN_RESULT");
                String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
                // Handle successful scan

                tv.setText(" 条形码为:"+contents+" 条码类型为: "+format);//利用页面的textveiw显示扫描后的结果

            } else if (resultCode == RESULT_CANCELED) {
                // Handle cancel
                tv.setText(" 扫描失败!");
            }
        }
    }
}