Android简易集成二维码，条形码扫描

public class MainActivity extends Activity {

private Button scanButton;
private TextView text;
private EditText input;
private Button genButton;
private ImageView img;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

scanButton = (Button) findViewById(R.id.scan);
text = (TextView) findViewById(R.id.text);
scanButton.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View arg0) {
Toast.makeText(MainActivity.this, "你可以扫描条形码或者二维码", Toast.LENGTH_SHORT).show();
Intent  startScan = new Intent(MainActivity.this, CaptureActivity.class);
//              startActivity(startScan);
startActivityForResult(startScan, 0);
}
});

input = (EditText) findViewById(R.id.input);
genButton = (Button) findViewById(R.id.gen);
img = (ImageView) findViewById(R.id.img);
genButton.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View arg0) {
String in = input.getText().toString();
if(in.equals("")){
Toast.makeText(MainActivity.this, "请输入文本", Toast.LENGTH_SHORT).show();
}else {
try {
//生成二维码
Bitmap qrcode = EncodingHandler.createQRCode(in, 400);
img.setImageBitmap(qrcode);
} catch (WriterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
String result = data.getExtras().getString("result");
text.setText(result);

//如何前四个字符为http;
// "hamburger".substring(4, 8) returns "urge"
// "smiles".substring(1, 5) returns "mile"
//既 result.substring(0,4).equils("http")
if(result.startsWith("http")||result.startsWith("www")){

//打开浏览器
Intent intent =new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri url=Uri.parse(result);
intent.setData(url);
startActivity(intent);
}

}
}

}