firebase 存储 - 使用 android 相机上传照片，但在将照片提交到 firebase 存储时崩溃

Question

public class BidInPutActivity extends AppCompatActivity implements ActivityCompat.OnRequestPermissionsResultCallback {

Button submit;
EditText title;
Spinner catg;
EditText dscrp;
EditText qnt;
RadioGroup rptrq_rdo;
RadioButton yes_rdo;
RadioButton no_rdo;
EditText exprdt;
ImageButton upldbtn;
ImageView prdctimg;
StorageReference filepath;
Uri uri;
String bidPhotoUrl;
private static final int CAMERA_REQUEST_CODE = 1;
private static  final int REQUEST_READ_PERMISSION = 2;

DatabaseReference databaseBid;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.bid_in_put_activity);

    filepath = FirebaseStorage.getInstance().getReference();

    databaseBid = FirebaseDatabase.getInstance().getReference("Bids");
    submit = (Button)findViewById(R.id.submit);
    title = (EditText)findViewById(R.id.title);
    catg = (Spinner)findViewById(R.id.catg);
    dscrp= (EditText)findViewById(R.id.dscrp);
    qnt= (EditText)findViewById(R.id.qnt);
    rptrq_rdo= (RadioGroup)findViewById(R.id.rptrq_rdo);
    yes_rdo=(RadioButton) findViewById(R.id.yes_rdo);
    no_rdo=(RadioButton) findViewById(R.id.no_rdo);
    exprdt= (EditText)findViewById(R.id.exprdt);
    upldbtn=(ImageButton)findViewById(R.id.upldbtn);
    prdctimg=(ImageView)findViewById(R.id.prdctimg);

    submit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            addBid();
        }
    });
//accessing camera intent and upload to firebase process

    upldbtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
           Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
           startActivityForResult(intent,CAMERA_REQUEST_CODE);
    private void addBid(){
    final String bidtitle=title.getText().toString().trim();
    final String bidcategory=catg.getSelectedItem().toString().trim();
    final String biddescription=dscrp.getText().toString().trim();
    final String bidquantity=qnt.getText().toString().trim();
    final String bidrepetitive_requests_yes=yes_rdo.getText().toString().trim();
    final String bidrepetitive_requests_no=yes_rdo.getText().toString().trim();
    final String bidexpiry_date=exprdt.getText().toString().trim();
    if((!TextUtils.isEmpty(bidtitle))&&(!TextUtils.isEmpty(bidcategory))
            &&(!TextUtils.isEmpty(biddescription)) &&(!TextUtils.isEmpty(bidquantity))
            &&(!TextUtils.isEmpty(bidrepetitive_requests_yes))||(!TextUtils.isEmpty(bidrepetitive_requests_no))
            &&(!TextUtils.isEmpty(bidexpiry_date))||(!TextUtils.isEmpty(bidPhotoUrl))){

   final StorageReference onlinestorafephotoref = filepath.child("Photo").child(bidtitle).child(uri.getLastPathSegment());

        onlinestorafephotoref.putFile(uri).addOnSuccessListener(new 
        OnSuccessListener<UploadTask.TaskSnapshot>() {

        @Override
        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {

               bidPhotoUrl = taskSnapshot.getDownloadUrl().toString();
               String id = databaseBid.push().getKey();
               classBidAttributes bid = new classBidAttributes(id,bidtitle,bidcategory,biddescription,bidquantity,
                        bidrepetitive_requests_no,bidrepetitive_requests_yes,bidexpiry_date,bidPhotoUrl);

                databaseBid.child(id).setValue(bid);
                Toast.makeText(BidInPutActivity.this, "Bid added", Toast.LENGTH_SHORT).show();
            }
        }).addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {

                Toast.makeText(BidInPutActivity.this, "Submit Failure ! Please Try Again", Toast.LENGTH_LONG).show();
                bidPhotoUrl = "";
                String id = databaseBid.push().getKey();
                classBidAttributes bid = new classBidAttributes(id,bidtitle,bidcategory,biddescription,bidquantity,
                        bidrepetitive_requests_no,bidrepetitive_requests_yes,bidexpiry_date,bidPhotoUrl);
                databaseBid.child(id).setValue(bid);
            }
        }); finish();*/

        Toast.makeText(BidInPutActivity.this, "Bid added", Toast.LENGTH_SHORT).show();
    }else{
        Toast.makeText(BidInPutActivity.this, "Fill in missing data", Toast.LENGTH_LONG).show();
    }
}
    public void onActivityResult(int requestCode, int resultCode, Intent data){
    super.onActivityResult(requestCode, resultCode, data);

    if(requestCode == CAMERA_REQUEST_CODE && resultCode == RESULT_OK && data != null){
        uri = data.getData();
        Glide.with(BidInPutActivity.this).load(uri).into(prdctimg);
    }
}
}

PS：如果我删除了所有与照片上传相关的代码部分，代码可以正常工作，因为它也将文本输入上传到firebase realtime database，我确保我的manifest 包含相机权限和read_external_storage 权限，并且我已确保在 ma​​rshmallow 的情况下允许访问相机，所以希望有人能提供帮助，因为这让我发疯了，如果你需要任何东西，请告诉我附加信息。

    ///////// CrashLog//////////

09-06 10:36:12.293 3616-3616/com.mrmazen.cbid E/AndroidRuntime: FATAL EXCEPTION: main
                                                            Process: com.mrmazen.cbid, PID: 3616
                                                            java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.net.Uri.getLastPathSegment()' on a null object reference
                                                                at com.mrmazen.cbid.BidInPutActivity.addBid(BidInPutActivity.java:122)
                                                                at com.mrmazen.cbid.BidInPutActivity.access$000(BidInPutActivity.java:30)
                                                                at com.mrmazen.cbid.BidInPutActivity$1.onClick(BidInPutActivity.java:75)
                                                                at android.view.View.performClick(View.java:5637)
                                                                at android.view.View$PerformClick.run(View.java:22429)
                                                                at android.os.Handler.handleCallback(Handler.java:751)
                                                                at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                at android.os.Looper.loop(Looper.java:154)
                                                                at android.app.ActivityThread.main(ActivityThread.java:6119)
                                                                at java.lang.reflect.Method.invoke(Native Method)
                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

Answer 1

请注意，没有记录从ACTION_IMAGE_CAPTURE 返回Uri，相机应用不需要在您的ACTION_IMAGE_CAPTURE Intent 中返回 Uri.Supply EXTRA_OUTPUT，在这种情况下，您知道图像应该放在哪里存储起来。

final Intent pictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            Uri pictureUri=getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
            //pass your uri as an Extra here
            pictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,pictureUri);
            startActivityForResult(pictureIntent, REQUEST_IMAGE_CAPTURE);

在onActivityResult 中检查null。一旦你将Uri 提供给Glide

        //get path here
          picturePath= pictureUri.getPath();