解决Android条码扫描模块的方法可以使用第三方库或自定义开发。以下是使用Zxing库的代码示例:
dependencies {
implementation 'com.google.zxing:core:3.3.3'
implementation 'com.journeyapps:zxing-android-embedded:3.6.0'
}
import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;
import com.journeyapps.barcodescanner.BarcodeCallback;
import com.journeyapps.barcodescanner.BarcodeEncoder;
import com.journeyapps.barcodescanner.BarcodeResult;
import com.journeyapps.barcodescanner.DecoratedBarcodeView;
import com.journeyapps.barcodescanner.DefaultDecoderFactory;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
public class BarcodeScannerActivity extends AppCompatActivity {
private DecoratedBarcodeView barcodeView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_barcode_scanner);
barcodeView = findViewById(R.id.barcodeView);
// 请求相机权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1);
} else {
startCamera();
}
}
@Override
protected void onResume() {
super.onResume();
barcodeView.resume();
}
@Override
protected void onPause() {
super.onPause();
barcodeView.pause();
}
private void startCamera() {
barcodeView.getBarcodeView().setDecoderFactory(new DefaultDecoderFactory(getFormats()));
barcodeView.initializeFromIntent(getIntent());
barcodeView.decodeContinuous(new BarcodeCallback() {
@Override
public void barcodeResult(BarcodeResult result) {
String barcodeValue = result.getText();
Toast.makeText(BarcodeScannerActivity.this, "扫描结果:" + barcodeValue, Toast.LENGTH_SHORT).show();
}
@Override
public void possibleResultPoints(List resultPoints) {
}
});
}
private Collection getFormats() {
return Arrays.asList(BarcodeFormat.QR_CODE, BarcodeFormat.CODE_39);
}
}
这样,当用户打开该Activity时,摄像头即会打开并进行条码扫描。扫描结果会通过Toast进行显示。
注意:在使用条码扫描功能前,需要在AndroidManifest.xml文件中添加相机权限。
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