尝试在空对象上调用虚拟方法“android.text.Editable android.widget.EditText.getText()” businessactivity.java业务活动.xml我的日志猫

如何解决尝试在空对象上调用虚拟方法“android.text.Editable android.widget.EditText.getText()” businessactivity.java业务活动.xml我的日志猫

我正在尝试选择一张图片，然后上传它。但是，当我选择一个图像时，它停止工作，这是很长的代码，所以我只是在此处包含了显示错误的代码部分。我试过检查所有的东西，但它不起作用。感谢帮助。

这是我的代码：

businessactivity.java

     public byte[] getFileDataFromDrawable(Bitmap bitmap) {
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG,80,byteArrayOutputStream);
        return byteArrayOutputStream.toByteArray();
    }

    private void uploadBitmap(final Bitmap bitmap) {

        //getting the tag from the edittext
        final String tags = editTextTags.getText().toString().trim();

        //our custom volley request
        VolleyMultipartRequest volleyMultipartRequest = new VolleyMultipartRequest(Request.Method.POST,AppConfig.UPLOAD_URL,new Response.Listener<NetworkResponse>() {
                    @Override
                    public void onResponse(NetworkResponse response) {
                        try {
                            JSONObject obj = new JSONObject(new String(response.data));
                            Toast.makeText(getApplicationContext(),obj.getString("message"),Toast.LENGTH_SHORT).show();
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                },new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(getApplicationContext(),error.getMessage(),Toast.LENGTH_SHORT).show();
                    }
                }) {

            /*
             * If you want to add more parameters with the image
             * you can do it here
             * here we have only one parameter with the image
             * which is tags
             * */
            @Override
            protected Map<String,String> getParams() throws AuthFailureError {
                Map<String,String> params = new HashMap<>();
                params.put("tags",tags);
                return params;
            }

            /*
             * Here we are passing image by renaming it with a unique name
             * */
            @Override
            protected Map<String,DataPart> getByteData() {
                Map<String,DataPart> params = new HashMap<>();
                long imagename = System.currentTimeMillis();
                params.put("pic",new DataPart(imagename + ".png",getFileDataFromDrawable(bitmap)));
                return params;
            }
        };

        //adding the request to volley
        Volley.newRequestQueue(this).add(volleyMultipartRequest);
    }

    //method to get the file path from uri
    public String getPath(Uri uri) {
        Cursor cursor = getContentResolver().query(uri,null,null);
        cursor.moveToFirst();
        String document_id = cursor.getString(0);
        document_id = document_id.substring(document_id.lastIndexOf(":") + 1);
        cursor.close();

        cursor = getContentResolver().query(
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI,MediaStore.Images.Media._ID + " = ? ",new String[]{document_id},null);
        cursor.moveToFirst();
        String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
        cursor.close();

        return path;
    }


    //Requesting permission
    private void requestStoragePermission() {
        if (ContextCompat.checkSelfPermission(this,Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED)
            return;

        if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.READ_EXTERNAL_STORAGE)) {
            //If the user has denied the permission previously your code will come to this block
            //Here you can explain why you need this permission
            //Explain here why you need this permission
        }
        //And finally ask for the permission
        ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},STORAGE_PERMISSION_CODE);
    }

业务活动.xml

       <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="vertical"
        android:scrollbarSize="10dp"
        android:scrollbarStyle="insideOverlay">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:orientation="vertical"
        android:layout_marginTop="20dp"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        >

        <Spinner
            android:id="@+id/spinner_Bname"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            />


        <EditText
            android:id="@+id/adress"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:hint="Flat No / Village/ Street"
            android:inputType="textEmailAddress"
            android:singleLine="true"
             />

        <EditText
            android:id="@+id/district"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:hint="@string/hint_district"
            android:inputType="text"
            android:singleLine="true"
            />

        <EditText
            android:id="@+id/state"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:hint="@string/hint_state"
            />


        <EditText
            android:id="@+id/pin"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:hint= "@string/hint_Pin"
            android:inputType="number"
            />



        <EditText
            android:id="@+id/Rate"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:hint="Rate in Rupees"
            android:inputType="numberDecimal"
            android:padding="10dp"
            android:singleLine="true" />

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
        <EditText
            android:id="@+id/editTextName"
            android:hint="Press Select Button"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

    <Button
        android:id="@+id/buttonChoose"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginStart="220dp"
        android:layout_marginLeft="220dp"
        android:text="Select" />

        <Button
            android:id="@+id/buttonUpload"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/editTextName"
            android:layout_marginStart="220dp"
            android:layout_marginLeft="220dp"
            android:text="Upload" />

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/buttonChoose"
            />

</RelativeLayout>

        <Button
            android:id="@+id/btnSave"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dip"
            android:text="@string/btn_Save"
            android:textAllCaps="false"
            android:background="#ea4c88"
            android:textColor="@color/white"
            android:textSize="15dp" />

我的日志猫

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 
'android.text.Editable android.widget.EditText.getText()' on a null object reference
at com.nidhi.timtom.BussinessActivity.uploadBitmap(BussinessActivity.java:254)
at com.nidhi.timtom.BussinessActivity.onActivityResult(BussinessActivity.java:226)
at android.app.Activity.dispatchActivityResult(Activity.java:6932)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4085)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4132) 
at android.app.ActivityThread.-wrap20(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1533)