android扫描二维码（zxing）附带小例子

开发android二维码的功能基本上是必须的了。下面的android小程序，主要实现了这样的一个功能，扫描二维码，然后把二维码内容和当时取得照片读出来。首先需要的是zxing的下载包，这里使用的是3.1.0的下载地址：下载完整版官方例子程序。参考android的程序，新建一个自己的小例子，把扫描的主要功能实现。这是程序的目录截图： android扫描二维码（zxing）附带小例子_第1张图片

这里仅仅列出主要的代码： MainActivity.java

package com.example.administrator.scanoo;import android.content.Intent;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;import org.w3c.dom.Text;public class MainActivity extends AppCompatActivity {    private Button button;    private TextView textView;    private ImageView imageView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        button = (Button) this.findViewById(R.id.button1);        textView = (TextView)this.findViewById(R.id.scanResult);        imageView = (ImageView)this.findViewById(R.id.scanimage);        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent(MainActivity.this, CaptureActivity.class);                startActivityForResult(intent, 0x123);            }        });    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if(requestCode == 0x123 && resultCode==0x345){            if(data != null){                textView.setText("扫描结果:\n" + data.getStringExtra("resultCode"));                imageView.setImageBitmap(TransData.bitmap);            }        }    }}

CaptureActivity.java

/* * Copyright (C) 2008 ZXing authors * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package com.example.administrator.scanoo;import android.app.Activity;import android.app.AlertDialog;import android.content.Intent;import android.content.pm.ActivityInfo;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.os.Bundle;import android.os.Handler;import android.preference.PreferenceManager;import android.util.Log;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.Window;import android.view.WindowManager;import android.widget.TextView;import android.widget.Toast;import com.google.zxing.BarcodeFormat;import com.google.zxing.DecodeHintType;import com.google.zxing.Result;import com.google.zxing.ResultPoint;import com.google.zxing.client.android.AmbientLightManager;import com.google.zxing.client.android.BeepManager;import com.google.zxing.client.android.CaptureActivityHandler;import com.google.zxing.client.android.FinishListener;import com.google.zxing.client.android.InactivityTimer;import com.google.zxing.client.android.ViewfinderView;import com.google.zxing.client.android.camera.CameraManager;import java.io.IOException;import java.util.Collection;import java.util.Map;/** * This activity opens the camera and does the actual scanning on a background * thread. It draws a viewfinder to help the user place the barcode correctly, * shows feedback as the image processing is happening, and then overlays the * results when a scan is successful. * * @author dswitkin@google.com (Daniel Switkin) * @author Sean Owen */public final class CaptureActivity extends Activity implements        SurfaceHolder.Callback {    private static final String TAG = CaptureActivity.class.getSimpleName();    private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;    private CameraManager cameraManager;    private CaptureActivityHandler handler;    private ViewfinderView viewfinderView;    private boolean hasSurface;    private Collection decodeFormats;    private Map decodeHints;    private String characterSet;    private InactivityTimer inactivityTimer;    private BeepManager beepManager;    private AmbientLightManager ambientLightManager;    public ViewfinderView getViewfinderView() {        return viewfinderView;    }    public Handler getHandler() {        return handler;    }    public CameraManager getCameraManager() {        return cameraManager;    }    @Override    public void onCreate(Bundle icicle) {        super.onCreate(icicle);        Window window = getWindow();        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);        setContentView(R.layout.capture);        hasSurface = false;        inactivityTimer = new InactivityTimer(this);        beepManager = new BeepManager(this);        ambientLightManager = new AmbientLightManager(this);        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);    }    @Override    protected void onResume() {        super.onResume();        // CameraManager must be initialized here, not in onCreate(). This is        // necessary because we don't        // want to open the camera driver and measure the screen size if we're        // going to show the help on        // first launch. That led to bugs where the scanning rectangle was the        // wrong size and partially        // off screen.        cameraManager = new CameraManager(getApplication());        viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);        viewfinderView.setCameraManager(cameraManager);        handler = null;        //设置横屏竖屏        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);        SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);        SurfaceHolder surfaceHolder = surfaceView.getHolder();        if (hasSurface) {            // The activity was paused but not stopped, so the surface still            // exists. Therefore            // surfaceCreated() won't be called, so init the camera here.            initCamera(surfaceHolder);        } else {            // Install the callback and wait for surfaceCreated() to init the            // camera.            surfaceHolder.addCallback(this);        }        beepManager.updatePrefs();        ambientLightManager.start(cameraManager);        inactivityTimer.onResume();        decodeFormats = null;        characterSet = null;    }    @Override    protected void onPause() {        if (handler != null) {            handler.quitSynchronously();            handler = null;        }        inactivityTimer.onPause();        ambientLightManager.stop();        beepManager.close();        cameraManager.closeDriver();        if (!hasSurface) {            SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);            SurfaceHolder surfaceHolder = surfaceView.getHolder();            surfaceHolder.removeCallback(this);        }        super.onPause();    }    @Override    protected void onDestroy() {        inactivityTimer.shutdown();        super.onDestroy();    }    @Override    public void surfaceCreated(SurfaceHolder holder) {        if (holder == null) {            Log.e(TAG,                    "*** WARNING *** surfaceCreated() gave us a null surface!");        }        if (!hasSurface) {            hasSurface = true;            initCamera(holder);        }    }    @Override    public void surfaceDestroyed(SurfaceHolder holder) {        hasSurface = false;    }    @Override    public void surfaceChanged(SurfaceHolder holder, int format, int width,                               int height) {    }    /**     * A valid barcode has been found, so give an indication of success and show     * the results.     *     * @param rawResult   The contents of the barcode.     * @param scaleFactor amount by which thumbnail was scaled     * @param barcode     A greyscale bitmap of the camera data which was decoded.     */    public void handleDecode(Result rawResult, Bitmap barcode, float scaleFactor) {        inactivityTimer.onActivity();        boolean fromLiveScan = barcode != null;        if (fromLiveScan) {            // Then not from history, so beep/vibrate and we have an image to            // draw on            beepManager.playBeepSoundAndVibrate();            Toast.makeText(CaptureActivity.this, rawResult.getText(), Toast.LENGTH_SHORT).show();            //开启下面的能够进行持续扫描//            restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);            Intent intent = new Intent();            intent.putExtra("resultCode",rawResult.getText());            TransData.bitmap = barcode;            setResult(0x345,intent);            finish();        }    }    private void initCamera(SurfaceHolder surfaceHolder) {        if (surfaceHolder == null) {            throw new IllegalStateException("No SurfaceHolder provided");        }        if (cameraManager.isOpen()) {            Log.w(TAG,                    "initCamera() while already open -- late SurfaceView callback?");            return;        }        try {            cameraManager.openDriver(surfaceHolder);            // Creating the handler starts the preview, which can also throw a            // RuntimeException.            if (handler == null) {                handler = new CaptureActivityHandler(this, decodeFormats,                        decodeHints, characterSet, cameraManager);            }        } catch (IOException ioe) {            Log.w(TAG, ioe);            displayFrameworkBugMessageAndExit();        } catch (RuntimeException e) {            // Barcode Scanner has seen crashes in the wild of this variety:            // java.?lang.?RuntimeException: Fail to connect to camera service            Log.w(TAG, "Unexpected error initializing camera", e);            displayFrameworkBugMessageAndExit();        }    }    private void displayFrameworkBugMessageAndExit() {        AlertDialog.Builder builder = new AlertDialog.Builder(this);        builder.setTitle(getString(R.string.app_name));        builder.setMessage(getString(R.string.msg_camera_framework_bug));        builder.setPositiveButton(R.string.button_ok, new FinishListener(this));        builder.setOnCancelListener(new FinishListener(this));        builder.show();    }    public void restartPreviewAfterDelay(long delayMS) {        if (handler != null) {            handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);        }    }    public void drawViewfinder() {        viewfinderView.drawViewfinder();    }}

TransData.java

package com.example.administrator.scanoo;import android.graphics.Bitmap;/** * Created by Administrator on 2016/9/19. *///防止图片过大，不能进行界面间传递public class TransData {    public static Bitmap bitmap;}

布局： activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

capture.xml

<?xml version="1.0" encoding="UTF-8"?>

运行效果截图：

最后，附上整个代码：点我下载，不要你的积分噢！

android扫描二维码（zxing）附带小例子

android扫描二维码（zxing）附带小例子

更多相关文章

随机推荐