Question

我正在尝试在我在Android Studio中设置的实际连接的设备Alps M16（Android 6.0，API 23）中启动play-visions-vision的条形码扫描仪。但是每次尝试启动条形码扫描仪时，当相机启动条形码扫描仪时，都会弹出此错误：

E / DynamiteModule：无法加载DynamiteLoader：   java.lang.NullPointerException：尝试调用虚拟方法   布尔值java.lang.String.contains（java.lang.CharSequence）   对象引用

W / DynamiteModule：无法加载远程模块：   无法获取模块上下文

V / ProviderLeakDetecter：游标   关闭：180333163打开的光标总数：0。

E / BarcodeNativeHandle：   错误加载模块

com.google.android.gms.dynamite.DynamiteModule $ LoadingException：   远程加载失败。找不到本地备用。

在较旧的设备上不会发生此错误，只会在特定设备上发生。中兴K85（Android 5.0.2，API 21）没有错误。

我使用的库是com.google.android.gms:play-services-vision:15.0.2

启动相机的活动：

package io.cordova.hellocordova;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.SparseArray;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;

import com.google.android.gms.common.api.CommonStatusCodes;
import com.google.android.gms.vision.CameraSource;
import com.google.android.gms.vision.Detector;
import com.google.android.gms.vision.barcode.Barcode;
import com.google.android.gms.vision.barcode.BarcodeDetector;

import java.io.IOException;

public class ScanBarcodeActivity extends Activity {
    SurfaceView cameraPreview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_scan_barcode);
        cameraPreview = (SurfaceView) findViewById(R.id.camera_preview);
        createCameraSource();
    }

    private void createCameraSource() {
        BarcodeDetector detector =
                new BarcodeDetector.Builder(this)
                        .setBarcodeFormats(Barcode.QR_CODE)
                        .build();

        CameraSource cs = new CameraSource.Builder(this, detector)
                .setAutoFocusEnabled(true)
                .setFacing(CameraSource.CAMERA_FACING_BACK)
                .setRequestedPreviewSize(1600, 1024)
                .build();

        cameraPreview.getHolder().addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder surfaceHolder) {
                if (ActivityCompat.checkSelfPermission(ScanBarcodeActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
                    String[] arr = { Manifest.permission.CAMERA };
                    // TODO: Consider calling
                    ActivityCompat.requestPermissions(ScanBarcodeActivity.this, arr , 2);
                    //    ActivityCompat#requestPermissions
                    // here to request the missing permissions, and then overriding

                    // to handle the case where the user grants the permission. See the documentation
                    // for ActivityCompat#requestPermissions for more details.
                    return;
                }
                try {
                    cs.start(cameraPreview.getHolder());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
                cs.stop();
            }
        });

        Detector.Processor<Barcode> pb = new Detector.Processor<Barcode>() {
            @Override
            public void release() {
                System.out.println("ended");
            }

            @Override
            public void receiveDetections(Detector.Detections<Barcode> detections) {
                final SparseArray<Barcode> barcodes = detections.getDetectedItems();

                if (barcodes.size() > 0) {
                    Intent intent = new Intent();
                    intent.putExtra("barcode", barcodes.valueAt(0).displayValue);
                    setResult(CommonStatusCodes.SUCCESS, intent);
                    finish();
                }
            }
        };

        detector.setProcessor(pb);

        if (!detector.isOperational()) {
            System.out.println("Could not set up the detector!");
            return;
        }
    }

}

E / DynamiteModule：无法为BarcodeNativeHandle模块加载DynamiteLoader：java.lang.NullPointerException

0 个答案: