前言

　　系列文章：[传送门]

　　五一，期待的两天假期。我的生日，happy。

　　【吐槽】

　　　　学校真恶心，半月前让我给他搞个东西，md，课题不加人。后来又来求，说钱（钱，咱不需要；我猜也不多）。到现在，又来了，我晕。直接一句话，加我给做，时间问题，有可能只是半成品。不加不做。

正文

　　上文，我们讲了 二维码生成解码

　　这次我们就用 android 来扫一下，实现android 扫二维码。

　　　　下载扫一扫

包结构-介绍

　　#com.zxing.xx 　　这是 zxing 库提供的

　　#BarCodeActivity

实战

　　一个按钮，一个显示结果的界面

package sedion.jeffli.activity;

import sedion.jeffli.itp.R;

import com.zxing.activity.CaptureActivity;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

public class BarCodeActivity extends Activity

{

    private TextView resultTextView;            //返回显示结果（以后没有用的）

    private Button   scanBarCodeButton;

    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.barcode);

        resultTextView = (TextView) this.findViewById(R.id.tv_scan_result);

        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

                Intent openCameraIntent = new Intent(BarCodeActivity.this,CaptureActivity.class);

                startActivityForResult(openCameraIntent, 0);

            }

        });

    }

    @Override

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

    {

        super.onActivityResult(requestCode, resultCode, data);

        //判断处理结果，并显示

        if (resultCode == RESULT_OK)

        {

            Bundle bundle = data.getExtras();

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

            //Toast.makeText(this, "result", Toast.LENGTH_LONG).show();

            resultTextView.setText(scanResult);

        }

    }

}

　　#new Intent(BarCodeActivity.this,CaptureActivity.class);

　　　　打开扫描界面 -> CaptureActivity (这个是进行扫描的activity）

　　 #resultCode == RESULT_OK

　　　　判断是否成功，成功显示结果。

你会看到：

下面是扫描的界面：

　　CaptureActivity（zxing库提供，nice）

package com.zxing.activity;

import java.io.IOException;

import java.util.Vector;

import sedion.jeffli.itp.R;

import android.app.Activity;

import android.content.Intent;

import android.content.res.AssetFileDescriptor;

import android.graphics.Bitmap;

import android.media.AudioManager;

import android.media.MediaPlayer;

import android.media.MediaPlayer.OnCompletionListener;

import android.os.Bundle;

import android.os.Handler;

import android.os.Vibrator;

import android.view.SurfaceHolder;

import android.view.SurfaceHolder.Callback;

import android.view.SurfaceView;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.Result;

import com.zxing.camera.CameraManager;

import com.zxing.decoding.CaptureActivityHandler;

import com.zxing.decoding.InactivityTimer;

import com.zxing.view.ViewfinderView;

/**

 * Initial the camera

 * @author Ryan.Tang

 */

public class CaptureActivity extends Activity implements Callback {

    private CaptureActivityHandler handler;

    private ViewfinderView viewfinderView;

    private boolean hasSurface;

    private Vector<BarcodeFormat> decodeFormats;

    private String characterSet;

    private InactivityTimer inactivityTimer;

    private MediaPlayer mediaPlayer;

    private boolean playBeep;

    private static final float BEEP_VOLUME = 0.10f;

    private boolean vibrate;

    private Button cancelScanButton;

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

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.camera);

        //ViewUtil.addTopView(getApplicationContext(), this, R.string.scan_card);

        CameraManager.init(getApplication());

        viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);

        cancelScanButton = (Button) this.findViewById(R.id.btn_cancel_scan);

        hasSurface = false;

        inactivityTimer = new InactivityTimer(this);

    }

    @Override

    protected void onResume() {

        super.onResume();

        SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);

        SurfaceHolder surfaceHolder = surfaceView.getHolder();

        if (hasSurface) {

            initCamera(surfaceHolder);

        } else {

            surfaceHolder.addCallback(this);

            surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        }

        decodeFormats = null;

        characterSet = null;

        playBeep = true;

        AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);

        if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {

            playBeep = false;

        }

        initBeepSound();

        vibrate = true;

        //quit the scan view

        cancelScanButton.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                CaptureActivity.this.finish();

            }

        });

    }

    @Override

    protected void onPause() {

        super.onPause();

        if (handler != null) {

            handler.quitSynchronously();

            handler = null;

        }

        CameraManager.get().closeDriver();

    }

    @Override

    protected void onDestroy() {

        inactivityTimer.shutdown();

        super.onDestroy();

    }

    /**

     * Handler scan result

     * @param result

     * @param barcode

     */

    public void handleDecode(Result result, Bitmap barcode) {

        inactivityTimer.onActivity();

        playBeepSoundAndVibrate();

        String resultString = result.getText();

        //FIXME

        if (resultString.equals("")) {

            Toast.makeText(CaptureActivity.this, "Scan failed!", Toast.LENGTH_SHORT).show();

        }else {

//            System.out.println("Result:"+resultString);

            Intent resultIntent = new Intent();

            Bundle bundle = new Bundle();

            bundle.putString("result", resultString);

            resultIntent.putExtras(bundle);

            this.setResult(RESULT_OK, resultIntent);

        }

        CaptureActivity.this.finish();

    }

    private void initCamera(SurfaceHolder surfaceHolder) {

        try {

            CameraManager.get().openDriver(surfaceHolder);

        } catch (IOException ioe) {

            return;

        } catch (RuntimeException e) {

            return;

        }

        if (handler == null) {

            handler = new CaptureActivityHandler(this, decodeFormats,

                    characterSet);

        }

    }

    @Override

    public void surfaceChanged(SurfaceHolder holder, int format, int width,

            int height) {

    }

    @Override

    public void surfaceCreated(SurfaceHolder holder) {

        if (!hasSurface) {

            hasSurface = true;

            initCamera(holder);

        }

    }

    @Override

    public void surfaceDestroyed(SurfaceHolder holder) {

        hasSurface = false;

    }

    public ViewfinderView getViewfinderView() {

        return viewfinderView;

    }

    public Handler getHandler() {

        return handler;

    }

    public void drawViewfinder() {

        viewfinderView.drawViewfinder();

    }

    private void initBeepSound() {

        if (playBeep && mediaPlayer == null) {

            // The volume on STREAM_SYSTEM is not adjustable, and users found it

            // too loud,

            // so we now play on the music stream.

            setVolumeControlStream(AudioManager.STREAM_MUSIC);

            mediaPlayer = new MediaPlayer();

            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

            mediaPlayer.setOnCompletionListener(beepListener);

            AssetFileDescriptor file = getResources().openRawResourceFd(

                    R.raw.beep);

            try {

                mediaPlayer.setDataSource(file.getFileDescriptor(),

                        file.getStartOffset(), file.getLength());

                file.close();

                mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);

                mediaPlayer.prepare();

            } catch (IOException e) {

                mediaPlayer = null;

            }

        }

    }

    private static final long VIBRATE_DURATION = 200L;

    private void playBeepSoundAndVibrate() {

        if (playBeep && mediaPlayer != null) {

            mediaPlayer.start();

        }

        if (vibrate) {

            Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);

            vibrator.vibrate(VIBRATE_DURATION);

        }

    }

    /**

     * When the beep has finished playing, rewind to queue up another one.

     */

    private final OnCompletionListener beepListener = new OnCompletionListener() {

        public void onCompletion(MediaPlayer mediaPlayer) {

            mediaPlayer.seekTo(0);

        }

    };

}

你会看到：

总结

　　android 二维码扫描

　　资源分享：

　　　　链接：http://pan.baidu.com/share/link?shareid=4287950048&uk=3307409781 密码：3ur2

感谢及资源共享

　　　　路上走来一步一个脚印，希望大家和我一起。

　　　　感谢读者！很喜欢你们给我的支持。我会尊重你说的每句话，和你尊重我的文章一样

　　　　知识来源：　https://github.com/zxing/zxing/wiki/Getting-Started-Developing

巴特西

项目ITP(二) 二维码拿起你的手机装一装，扫一扫【每日一搏】

前言

正文

包结构-介绍

实战

总结

感谢及资源共享

最新文章

热门文章

巴特西

项目ITP(二) 二维码 拿起你的手机装一装，扫一扫 【每日一搏】

前言

正文

包结构-介绍

实战

总结

感谢及资源共享

最新文章

热门文章

项目ITP(二) 二维码拿起你的手机装一装，扫一扫【每日一搏】