ZXing使用

ZXing的使用

ZXing項目GitHub地址：ZXing
ZXing Lib GitHub地址：ZXingLib

參考文章：ZXing使用全解析

---

• 下載封裝好的ZXingLib

• Import Module libzxing

• 添加依賴

• Sample代碼

ZXingActivity.java

package com.silion.androidproject.zxing;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
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.silion.androidproject.R;
import com.xys.libzxing.zxing.activity.CaptureActivity;
import com.xys.libzxing.zxing.encoding.EncodingUtils;

public class ZXingActivity extends AppCompatActivity {
    private TextView resultTextView;
    private EditText qrStrEditText;
    private ImageView qrImgImageView;
    private CheckBox mCheckBox;

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

        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 View.OnClickListener() {

            @Override
            public void onClick(View v) {
                //打開掃描界面掃描條形碼或二維碼
                Intent openCameraIntent = new Intent(ZXingActivity.this, CaptureActivity.class);
                startActivityForResult(openCameraIntent, 0);
            }
        });

        Button generateQRCodeButton = (Button) this.findViewById(R.id.btn_add_qrcode);
        generateQRCodeButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                String contentString = qrStrEditText.getText().toString();
                if (!contentString.equals("")) {
                    //根據字符串生成二維碼圖片並顯示在界面上，第二個參數爲圖片的大小（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(ZXingActivity.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);
        }
    }
}

佈局activity_zxing.xml

<?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>