二维码的解析和二维码生成

扫码使很多应用都有的一个功能，公司刚好需要一个扫码功能就写了个Demo，希望对需要的人有用。先上图：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="littlestory.com.demo.MainActivity">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="scan"
        android:text="Start Scan" />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="16sp"
        android:text="Result:" />
    <TextView
        android:id="@+id/tv_result"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="16sp" />
    <EditText
        android:id="@+id/tv_text"
        android:hint="Input"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="16sp" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Make QRCode"
        android:onClick="make"/>
    <CheckBox
        android:id="@+id/cb_logo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Logo"/>
    <ImageView
        android:id="@+id/iv_result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:background="@mipmap/ic_launcher"/>
</LinearLayout>

public class MainActivity extends Activity {

    private TextView mTvResult;
    private EditText mInput;
    private ImageView mResult;
    private CheckBox mLogo;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mTvResult= (TextView) findViewById(R.id.tv_result);
        mInput= (EditText) findViewById(R.id.tv_text);
        mResult= (ImageView) findViewById(R.id.iv_result);
        mLogo= (CheckBox) findViewById(R.id.cb_logo);
    }
    public void scan(View view){
        startActivityForResult(new Intent(MainActivity.this, CaptureActivity.class),0);

    }
    public void make(View view){
        String input=mInput.getText().toString();
        if(input.equals("")){
            Toast.makeText(MainActivity.this,"输入不能为空",Toast.LENGTH_LONG).show();
        }else {
            Bitmap bitmap= EncodingUtils.createQRCode(input,500,500,mLogo.isChecked()?
                    BitmapFactory.decodeResource(getResources(),R.mipmap.b):null);
            mResult.setImageBitmap(bitmap);
        }

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode==RESULT_OK){
            Bundle bundle=data.getExtras();
            String result=bundle.getString("result");
            mTvResult.setText(result);
        }
    }
}