实现二维码扫描
第一步,先导入zxing类库和jar包
第二步,在layout中添加两个布局
capture_activity.xml :扫描界面的布局
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:background="@android:color/transparent"
- android:orientation="vertical">
- <SurfaceView
- android:id="@+id/capture_surfaceview"
- android:layout_width="match_parent"
- android:layout_height="match_parent" />
- <RelativeLayout
- android:id="@+id/capture_container"
- android:layout_width="match_parent"
- android:layout_height="match_parent">
- <ImageView
- android:id="@+id/capture_mask_top"
- android:layout_width="match_parent"
- android:layout_height="120dp"
- android:layout_alignParentTop="true"
- android:background="@mipmap/shadow" />
- <RelativeLayout
- android:id="@+id/capture_crop_view"
- android:layout_width="220dp"
- android:layout_height="220dp"
- android:layout_below="@id/capture_mask_top"
- android:layout_centerHorizontal="true"
- android:background="@mipmap/zcapture">
- <ImageView
- android:id="@+id/capture_scan_line"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:layout_alignParentTop="true"
- android:layout_marginBottom="5dp"
- android:layout_marginTop="5dp"
- android:src="@mipmap/scan_line" />
- </RelativeLayout>
- <ImageView
- android:id="@+id/capture_mask_bottom"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:layout_alignParentBottom="true"
- android:layout_below="@id/capture_crop_view"
- android:background="@mipmap/shadow" />
- <ImageView
- android:id="@+id/capture_mask_left"
- android:layout_width="wrap_content"
- android:layout_height="match_parent"
- android:layout_above="@id/capture_mask_bottom"
- android:layout_alignParentLeft="true"
- android:layout_below="@id/capture_mask_top"
- android:layout_toLeftOf="@id/capture_crop_view"
- android:background="@mipmap/shadow" />
- <ImageView
- android:id="@+id/capture_mask_right"
- android:layout_width="wrap_content"
- android:layout_height="match_parent"
- android:layout_above="@id/capture_mask_bottom"
- android:layout_alignParentRight="true"
- android:layout_below="@id/capture_mask_top"
- android:layout_toRightOf="@id/capture_crop_view"
- android:background="@mipmap/shadow" />
- </RelativeLayout>
- </RelativeLayout>
zxing_start_layout.xml :启动扫描界面的布局
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="vertical">
- <TextView
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:id="@+id/zxing_text"/>
- <Button
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:id="@+id/button1"
- android:text="扫码"/>
- </LinearLayout>
第三步,在res目录下新建目录raw存放音频文件,用于扫描成功后的提示音
在mipmap目录下放几张图片,作为扫描线,阴影,边框
qrcode_scan_line.png
scan_line.9.png
shadow.png
zcapture.9.png
目录:
第四步,在values目录下添加ids.xml文件
ids.xml
- <?xml version="1.0" encoding="utf-8"?>
- <resources>
- <item name="decode" type="id"/>
- <item name="decode_failed" type="id"/>
- <item name="decode_succeeded" type="id"/>
- <item name="quit" type="id"/>
- <item name="restart_preview" type="id"/>
- <item name="return_scan_result" type="id"/>
- </resources>
第五步,新建一个StartCaptureActivity,用于启动扫描界面
- package com.ard.captureapp.zxing.activity;
- import android.app.Activity;
- import android.content.Intent;
- import android.os.Bundle;
- import android.view.View;
- import android.widget.TextView;
- import com.ard.captureapp.R;
- public class StartCaptureActivity extends Activity {
- TextView tv=null;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.zxing_start_layout);
- tv= (TextView) findViewById(R.id.zxing_text);
- findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- Intent intent = new Intent(StartCaptureActivity.this, CaptureActivity.class);
- startActivityForResult(intent, 0x1);
- }
- });
- }
- //重写该方法获取扫描完成后得到的结果
- @Override
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- super.onActivityResult(requestCode, resultCode, data);
- if(resultCode==RESULT_OK&&data!=null){
- Bundle bundle=data.getExtras();
- tv.setText(bundle.getString("result"));
- }
- }
- }
- /*
- * 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.ard.captureapp.zxing.activity;
- import android.app.Activity;
- import android.app.AlertDialog;
- import android.content.DialogInterface;
- import android.content.Intent;
- import android.graphics.Rect;
- import android.os.Bundle;
- import android.os.Handler;
- import android.util.Log;
- import android.view.SurfaceHolder;
- import android.view.SurfaceView;
- import android.view.Window;
- import android.view.WindowManager;
- import android.view.animation.Animation;
- import android.view.animation.TranslateAnimation;
- import android.widget.ImageView;
- import android.widget.RelativeLayout;
- import com.ard.captureapp.R;
- import com.ard.captureapp.zxing.camera.CameraManager;
- import com.ard.captureapp.zxing.decode.DecodeThread;
- import com.ard.captureapp.zxing.utils.BeepManager;
- import com.ard.captureapp.zxing.utils.CaptureActivityHandler;
- import com.ard.captureapp.zxing.utils.InactivityTimer;
- import com.google.zxing.Result;
- import java.io.IOException;
- import java.lang.reflect.Field;
- /**
- * 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.
- *
- */
- public final class CaptureActivity extends Activity implements SurfaceHolder.Callback {
- private static final String TAG = CaptureActivity.class.getSimpleName();
- private CameraManager cameraManager;
- private CaptureActivityHandler handler;
- private InactivityTimer inactivityTimer;
- private BeepManager beepManager;
- private SurfaceView scanPreview = null;
- private RelativeLayout scanContainer;
- private RelativeLayout scanCropView;
- private ImageView scanLine;
- private Rect mCropRect = null;
- private boolean isHasSurface = false;
- 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_activity);
- initView();
- }
- private void initView() {
- scanPreview = (SurfaceView) findViewById(R.id.capture_surfaceview);
- scanContainer = (RelativeLayout) findViewById(R.id.capture_container);
- scanCropView = (RelativeLayout) findViewById(R.id.capture_crop_view);
- scanLine = (ImageView) findViewById(R.id.capture_scan_line);
- inactivityTimer = new InactivityTimer(this);
- beepManager = new BeepManager(this);
- TranslateAnimation animation = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f, Animation
- .RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT,
- 0.9f);
- animation.setDuration(4500);
- animation.setRepeatCount(-1);
- animation.setRepeatMode(Animation.RESTART);
- scanLine.startAnimation(animation);
- }
- @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());
- handler = null;
- if (isHasSurface) {
- // The activity was paused but not stopped, so the surface still
- // exists. Therefore
- // surfaceCreated() won't be called, so init the camera here.
- initCamera(scanPreview.getHolder());
- } else {
- // Install the callback and wait for surfaceCreated() to init the
- // camera.
- scanPreview.getHolder().addCallback(this);
- }
- inactivityTimer.onResume();
- }
- @Override
- protected void onPause() {
- if (handler != null) {
- handler.quitSynchronously();
- handler = null;
- }
- inactivityTimer.onPause();
- beepManager.close();
- cameraManager.closeDriver();
- if (!isHasSurface) {
- scanPreview.getHolder().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 (!isHasSurface) {
- isHasSurface = true;
- initCamera(holder);
- }
- }
- @Override
- public void surfaceDestroyed(SurfaceHolder holder) {
- isHasSurface = 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 bundle The extras
- */
- public void handleDecode(Result rawResult, Bundle bundle) {
- inactivityTimer.onActivity();
- beepManager.playBeepSoundAndVibrate();
- /**
- * 返回解析数据
- * 注:用真机测试
- */
- Intent resultIntent = new Intent();
- bundle.putString("result", rawResult.getText());
- resultIntent.putExtras(bundle);
- this.setResult(RESULT_OK, resultIntent);
- CaptureActivity.this.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, cameraManager, DecodeThread.ALL_MODE);
- }
- initCrop();
- } 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() {
- // camera error
- AlertDialog.Builder builder = new AlertDialog.Builder(this);
- builder.setTitle(getString(R.string.app_name));
- builder.setMessage("Camera error");
- builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- finish();
- }
- });
- builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
- @Override
- public void onCancel(DialogInterface dialog) {
- finish();
- }
- });
- builder.show();
- }
- public void restartPreviewAfterDelay(long delayMS) {
- if (handler != null) {
- handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);
- }
- }
- public Rect getCropRect() {
- return mCropRect;
- }
- /**
- * 初始化截取的矩形区域
- */
- private void initCrop() {
- int cameraWidth = cameraManager.getCameraResolution().y;
- int cameraHeight = cameraManager.getCameraResolution().x;
- /** 获取布局中扫描框的位置信息 */
- int[] location = new int[2];
- scanCropView.getLocationInWindow(location);
- int cropLeft = location[0];
- int cropTop = location[1] - getStatusBarHeight();
- int cropWidth = scanCropView.getWidth();
- int cropHeight = scanCropView.getHeight();
- /** 获取布局容器的宽高 */
- int containerWidth = scanContainer.getWidth();
- int containerHeight = scanContainer.getHeight();
- /** 计算最终截取的矩形的左上角顶点x坐标 */
- int x = cropLeft * cameraWidth / containerWidth;
- /** 计算最终截取的矩形的左上角顶点y坐标 */
- int y = cropTop * cameraHeight / containerHeight;
- /** 计算最终截取的矩形的宽度 */
- int width = cropWidth * cameraWidth / containerWidth;
- /** 计算最终截取的矩形的高度 */
- int height = cropHeight * cameraHeight / containerHeight;
- /** 生成最终的截取的矩形 */
- mCropRect = new Rect(x, y, width + x, height + y);
- }
- private int getStatusBarHeight() {
- try {
- Class<?> c = Class.forName("com.android.internal.R$dimen");
- Object obj = c.newInstance();
- Field field = c.getField("status_bar_height");
- int x = Integer.parseInt(field.get(obj).toString());
- return getResources().getDimensionPixelSize(x);
- } catch (Exception e) {
- e.printStackTrace();
- }
- return 0;
- }
- }
注意:要在清单文件中配置这两个Activity,并添加相关权限
- <?xml version="1.0" encoding="utf-8"?>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android"
- package="com.ard.captureapp" >
- <!-- 摄像头权限 --> <!-- 二维码扫码 -->
- <uses-permission android:name="android.permission.CAMERA" />
- <uses-permission android:name="android.permission.FLASHLIGHT" />
- <uses-permission android:name="android.permission.VIBRATE" />
- <uses-feature android:name="android.hardware.camera" />
- <uses-feature android:name="android.hardware.camera.autofocus" />
- <application
- android:allowBackup="true"
- android:icon="@mipmap/ic_launcher"
- android:label="@string/app_name"
- android:supportsRtl="true"
- android:theme="@style/AppTheme" >
- <activity android:name=".zxing.activity.StartCaptureActivity" >
- <intent-filter>
- <action android:name="android.intent.action.MAIN" />
- <category android:name="android.intent.category.LAUNCHER" />
- </intent-filter>
- </activity>
- <activity android:name=".zxing.activity.CaptureActivity"/>
- </application>
- </manifest>