Android二维码扫描功能的集成开发

2023-07-22 16:17:16

二维码开发主要依赖ZXing开源项目

项目地址:https://github.com/zxing/zxing

这个开源项目可以扫描一维，和二维码，

一维码指的是书后面的条形码

首先配置ZXing库和Android工程

项目本身非常大，我们只需使用精简版的库

导入之后

TestQRcode 项目作为库被其他项目使用。

BarCodeTestActivity

package com.ericssonlabs;

import com.google.zxing.WriterException;

import com.zxing.activity.CaptureActivity;

import com.zxing.encoding.EncodingHandler;

import android.app.Activity;

import android.content.Intent;

import android.graphics.Bitmap;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.ImageView;

import android.widget.TextView;

import android.widget.Toast;

public class BarCodeTestActivity extends Activity {

    /** Called when the activity is first created. */

    private TextView resultTextView;

    private EditText qrStrEditText;

    private ImageView qrImgImageView;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.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);

        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(BarCodeTestActivity.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) {

                try {

                    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 = EncodingHandler.createQRCode(contentString, 350);

                        qrImgImageView.setImageBitmap(qrCodeBitmap);

                    }else {

                        Toast.makeText(BarCodeTestActivity.this, "Text can not be empty", Toast.LENGTH_SHORT).show();

                    }

                } catch (WriterException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

            }

        });

    }

    @Override

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        super.onActivityResult(requestCode, resultCode, data);

        //处理扫描结果（在界面上显示）

        if (resultCode == RESULT_OK) {

            Bundle bundle = data.getExtras();

            String scanResult = bundle.getString("result");

            resultTextView.setText(scanResult);

        }

    }

}

创建项目TestQRcode,来使用BarCodeTest库

xml文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/container"

    android:orientation="vertical"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context="com.jikexueyuan.testqrcode.MainActivity"

    tools:ignore="MergeRootFrame" >

    <Button

        android:id="@+id/scan"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="开始扫描二维码" />

    <TextView

        android:id="@+id/text"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="show"

        />

   <EditText

       android:id="@+id/input"

       android:layout_width="fill_parent"

       android:layout_height="wrap_content"

       android:hint="请输入要编码的内容"

       />

   <Button

       android:id="@+id/gen"

       android:layout_width="fill_parent"

       android:layout_height="wrap_content"

       android:text="生成二维码"

       />

   <ImageView

       android:id="@+id/img"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content"

       android:layout_gravity="center_horizontal"

       />

</LinearLayout>

MainActivity

 package com.jikexueyuan.testqrcode;

import junit.framework.Test;

import com.google.zxing.WriterException;

import com.zxing.activity.CaptureActivity;

import com.zxing.encoding.EncodingHandler;

import android.app.Activity;

import android.app.ActionBar;

import android.app.Fragment;

import android.content.Intent;

import android.graphics.Bitmap;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.EditText;

import android.widget.ImageView;

import android.widget.TextView;

import android.widget.Toast;

import android.os.Build;

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, "你写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 {

                        Bitmap qrcode = EncodingHandler.createQRCode(in, 400);

                        img.setImageBitmap(qrcode);

                    } catch (WriterException e) {

                        e.printStackTrace();

                    }

                }

            }

        });

    }

    @Override

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        super.onActivityResult(requestCode, resultCode, data);

        if (resultCode == RESULT_OK) {

            String result = data.getExtras().getString("result");

            text.setText(result);

        }

    }

}

注册CaptureActivity.java

<activity

            android:configChanges="orientation|keyboardHidden"

            android:name="com.zxing.activity.CaptureActivity"

            android:screenOrientation="portrait"

            android:theme="@android:style/Theme.NoTitleBar.Fullscreen"

            android:windowSoftInputMode="stateAlwaysHidden" >

        </activity>

另外还要添加两个权限，一个是振动，一个是照相机

    <uses-permission android:name="android.permission.CAMERA"/>

    <uses-permission android:name="android.permission.VIBRATE"/>

下载地址：链接：http://pan.baidu.com/s/1uJVII 密码：0uof

码农公寓

相关文章