android扫描代码

来源：互联网发布：做数据库系统编辑：程序博客网时间：2024/05/19 14:55

如果看代码不明白也可以下载视频例子查看

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"/>

源码下载地址：

链接：http://pan.baidu.com/s/1sle8mlR

视频下载地址：

链接：http://pan.baidu.com/s/1sle8mlR
关注公众号（ID:daimajiqiao）回复（二维码扫描）即可获取提取密码
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付出总会有收获

作者：代码技巧
链接：http://www.jianshu.com/p/c438046bc23e
來源：简书
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