二维码扫描生成的简单使用

repositories {
    flatDir {
        dirs ‘libs‘
    }
}

5、build.gradle里面的dependencies下添加

zxing3.1 是aar文件的名字

compile(name: ‘zxing3.1‘, ext: ‘aar‘)
6、创建你想要显示的布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@android:color/white"
    android:orientation="vertical">
    <Button
        android:id="@+id/btn_scan_barcode"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:text="Start Scan"/>
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Result："
            android:textSize="18sp"/>
        <TextView
            android:id="@+id/tv_scan_result"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:textColor="@android:color/black"
            android:textSize="18sp"/>
    </LinearLayout>
    <EditText
        android:id="@+id/et_qr_string"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:hint="Input the text"/>
    <Button
        android:id="@+id/btn_add_qrcode"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Generate QRcode"/>
    <CheckBox
        android:id="@+id/logo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Logo"/>
    <ImageView
        android:id="@+id/iv_qr_image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="10dp"
        android:background="@mipmap/ic_launcher"/>
</LinearLayout>
布局效果图如下



7、创建java文件编写具体逻辑

package lpc.com.zxingdemo;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.xys.libzxing.zxing.activity.CaptureActivity;
import com.xys.libzxing.zxing.encoding.EncodingUtils;
public class MainActivity extends Activity {
    private TextView resultTextView;
    private EditText qrStrEditText;
    private ImageView qrImgImageView;
    private CheckBox mCheckBox;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        resultTextView = (TextView) this.findViewById(R.id.tv_scan_result);
        qrStrEditText = (EditText) this.findViewById(R.id.et_qr_string);
        qrImgImageView = (ImageView) this.findViewById(R.id.iv_qr_image);
        mCheckBox = (CheckBox) findViewById(R.id.logo);
        Button scanBarCodeButton = (Button) this.findViewById(R.id.btn_scan_barcode);
        scanBarCodeButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                //打开扫描界面扫描条形码或二维码
                Intent openCameraIntent = new Intent(MainActivity.this, CaptureActivity.class);
                startActivityForResult(openCameraIntent, 0);
            }
        });
        Button generateQRCodeButton = (Button) this.findViewById(R.id.btn_add_qrcode);
        generateQRCodeButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                String contentString = qrStrEditText.getText().toString();
                if (!contentString.equals("")) {
                    //根据字符串生成二维码图片并显示在界面上，第二个参数为图片的大小（350*350）
                    Bitmap qrCodeBitmap = EncodingUtils.createQRCode(contentString, 350, 350,
                            mCheckBox.isChecked() ?
                                    BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher) :
                                    null);
                    qrImgImageView.setImageBitmap(qrCodeBitmap);
                } else {
                    Toast.makeText(MainActivity.this, "Text can not be empty", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            Bundle bundle = data.getExtras();
            String scanResult = bundle.getString("result");
            resultTextView.setText(scanResult);
        }
    }
}

8、最后实现的效果