Question

应用程序在单击带有错误的图像时崩溃“java.lang.RuntimeException：失败传递结果ResultInfo {who = null，request = 0，result = -1，data = Intent {act = inline-data（has extras））}} to activity {com.example.android.imageuploader / com.example.android.imageuploader.MainActivity}：java.lang.NullPointerException“

主要活动： -

package com.example.android.imageuploader;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.preference.PreferenceManager;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;

import static android.R.attr.cacheColorHint;
import static android.R.attr.data;

public class MainActivity extends AppCompatActivity {
    private static final int REQUEST_CODE = 0;
    private StorageReference storageReference;
    private ProgressDialog progressDialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        storageReference = FirebaseStorage.getInstance().getReference();
        progressDialog = new ProgressDialog(this);
        Button clickButton = (Button) findViewById(R.id.button_click);
        clickButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(cameraIntent, REQUEST_CODE);                            //starting camera intent
            }
        });

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
            progressDialog.setMessage("Upload In Progress...");
            progressDialog.show();
            Uri uri = data.getData();
            StorageReference filePath = storageReference.child("Pictures").child(uri.getLastPathSegment());
            filePath.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                    progressDialog.dismiss();
                    Toast.makeText(getApplicationContext(), "Upload Successful!!!", Toast.LENGTH_SHORT).show();
                }
            }).addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Toast.makeText(getApplicationContext(), "Upload Unsuccessful!!!", Toast.LENGTH_SHORT).show();
                }
            });


        }
    }
}

logcat的

FATAL EXCEPTION: main
   Process: com.example.android.imageuploader, PID: 2801
   java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=Intent { act=inline-data (has extras) }} to activity {com.example.android.imageuploader/com.example.android.imageuploader.MainActivity}: java.lang.NullPointerException
       at android.app.ActivityThread.deliverResults(ActivityThread.java:3363)
       at android.app.ActivityThread.handleSendResult(ActivityThread.java:3406)
       at android.app.ActivityThread.access$1300(ActivityThread.java:135)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
       at android.os.Handler.dispatchMessage(Handler.java:102)
       at android.os.Looper.loop(Looper.java:136)
       at android.app.ActivityThread.main(ActivityThread.java:5019)
       at java.lang.reflect.Method.invokeNative(Native Method)
       at java.lang.reflect.Method.invoke(Method.java:515)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
       at dalvik.system.NativeStart.main(Native Method)
    Caused by: java.lang.NullPointerException
       at com.example.android.imageuploader.MainActivity.onActivityResult(MainActivity.java:56)
       at android.app.Activity.dispatchActivityResult(Activity.java:5423)
       at android.app.ActivityThread.deliverResults(ActivityThread.java:3359)
       at android.app.ActivityThread.handleSendResult(ActivityThread.java:3406) 
       at android.app.ActivityThread.access$1300(ActivityThread.java:135) 
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244) 
       at android.os.Handler.dispatchMessage(Handler.java:102) 
       at android.os.Looper.loop(Looper.java:136) 
       at android.app.ActivityThread.main(ActivityThread.java:5019) 
       at java.lang.reflect.Method.invokeNative(Native Method)

Answer 1

读取logcat。 onActivityResult方法中的NullPointException。 com.example.android.imageuploader.MainActivity。 onActivityResult（MainActivity.java:56） at

Answer 2

如果有人仍然在想，我有这个问题，在我的情况下，这是因为意图不再返回图像的Uri而是返回图像位图作为额外的，所以您可以尝试检索位图从“ OnActivityResults” intent（“ data”）中额外创建一个文件，然后从该位图创建一个文件并使用它上传到firebase，为什么这个意图确实如此，所以我不确定我是否正在使用文件提供程序，然后将其删除了，所以我认为在这个阶段，正是这种东西改变了意图的行为。

“无法提供结果ResultInfo {who = null，request = 0，result = -1，data = Intent {act = inline-data（has extras）}}

2 个答案: