好的，我可以帮助你设计这个项目结构和代码。我们将使用Android Studio来开发这个应用，并使用ZBar库来扫描条形码。 项目结构 ``` ExpressTracker/ ├── app/ │ ├── src/ │ │ ├── main/ │ │ │ ├── java/ │ │ │ │ └── com/ │ │ │ │ └── example/ │ │ │ │ └── expresstracker/ │ │ │ │ ├── MainActivity.java │ │ │ │ ├── BarcodeScanner.java │ │ │ │ └── VideoRecorder.java │ │ │ ├── res/ │ │ │ │ ├── layout/ │ │ │ │ │ └── activity_main.xml │ │ │ │ ├── values/ │ │ │ │ │ └── strings.xml │ │ │ │ └── AndroidManifest.xml │ │ ├── build.gradle │ └── build.gradle ``` 具体代码 `build.gradle` (Module: app) ```groovy apply plugin: 'com.android.application' android { compileSdkVersion 30 defaultConfig { applicationId "com.example.expresstracker" minSdkVersion 21 targetSdkVersion 30 versionCode 1 versionName "1.0" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } } dependencies { implementation 'com.google.zxing:core:3.4.1' implementation 'com.journeyapps:zxing-android-embedded:4.1.0' implementation 'androidx.camera:camera-core:1.0.0' implementation 'androidx.camera:camera-camera2:1.0.0' implementation 'androidx.camera:camera-lifecycle:1.0.0' implementation 'androidx.camera:camera-view:1.0.0-alpha27' } ``` `AndroidManifest.xml` ```xml <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.expresstracker"> <uses-permission android:name="android.permission.CAMERA"/> <uses-permission android:name="android.permission.RECORD_AUDIO"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <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:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/Theme.ExpressTracker"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> ``` `activity_main.xml` ```xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <SurfaceView android:id="@+id/surfaceView" android:layout_width="match_parent" android:layout_height="match_parent" /> <Button android:id="@+id/btnEndRecording" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="End Recording" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" /> </RelativeLayout> ``` `MainActivity.java` ```java package com.example.expresstracker; import android.Manifest; import android.content.pm.PackageManager; import android.os.Bundle; import android.util.Log; import android.view.SurfaceView; import android.view.View; import android.widget.Button; import androidx.annotation.NonNull; import androidx.appcompat.app.AppCompatActivity; import androidx.camera.core.CameraSelector; import androidx.camera.core.Preview; import androidx.camera.lifecycle.ProcessCameraProvider; import androidx.core.app.ActivityCompat; import androidx.core.content.ContextCompat; import com.google.common.util.concurrent.ListenableFuture; import net.sourceforge.zbar.ImageScanner; import net.sourceforge.zbar.SymbolSet; import net.sourceforge.zbar.Symbol; import net.sourceforge.zbar.Image; import java.io.IOException; import java.util.concurrent.ExecutionException; public class MainActivity extends AppCompatActivity { private static final int CAMERA_REQUEST_CODE = 100; private SurfaceView surfaceView; private ImageScanner scanner; private boolean isRecording = false; private VideoRecorder videoRecorder; private String barcodeData = null; private ProcessCameraProvider cameraProvider; private Preview preview; private ListenableFuture<ProcessCameraProvider> cameraProviderFuture; private Button btnEndRecording; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); surfaceView = findViewById(R.id.surfaceView); btnEndRecording = findViewById(R.id.btnEndRecording); scanner = new ImageScanner(); scanner.setConfig(0, ImageScanner.CFG_ENABLE, 1); // Enable all symbol types for scanning videoRecorder = new VideoRecorder(); requestCameraPermission(); } private void requestCameraPermission() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, CAMERA_REQUEST_CODE); } else { startCamera(); } } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == CAMERA_REQUEST_CODE && grantResults[0] == PackageManager.PERMISSION_GRANTED) { startCamera(); } else { // Handle the case where the user denies the permission request } } private void startCamera() { cameraProviderFuture = ProcessCameraProvider.getInstance(this); cameraProviderFuture.addListener(() -> { try { cameraProvider = cameraProviderFuture.get(); bindPreview(cameraProvider); } catch (ExecutionException | InterruptedException e) { e.printStackTrace(); } }, ContextCompat.getMainExecutor(this)); } private void bindPreview(@NonNull ProcessCameraProvider cameraProvider) { preview = new Preview.Builder().build(); CameraSelector cameraSelector = new CameraSelector.Builder() .requireLensFacing(CameraSelector [2024-12-10 13:24:40 | AI写代码神器 | 2048点数解答]