Question

出于某些原因，在@overide部分，它表示＆＃39;方法不会覆盖来自它的超类的方法＆＃39;。我该如何解决这个问题？

public class Main6Activity extends AppCompatActivity {
    private Button buttonChoose;
    private Button buttonUpload;

    private ImageView imageView;

    private EditText editTextName;

    private Bitmap bitmap;

    private int PICK_IMAGE_REQUEST = 1;

    private String UPLOAD_URL = "http://simplifiedcoding.16mb.com/VolleyUpload/upload.php";

    private String KEY_IMAGE = "image";
    private String KEY_NAME = "name";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main6);

        buttonChoose = (Button) findViewById(R.id.buttonChoose);
        buttonUpload = (Button) findViewById(R.id.buttonUpload);

        editTextName = (EditText) findViewById(R.id.editText);

        imageView = (ImageView) findViewById(R.id.imageView);

        buttonChoose.setOnClickListener(this);
        buttonUpload.setOnClickListener(this);
    }

    public String getStringImage(Bitmap bmp) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        byte[] imageBytes = baos.toByteArray();
        String encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
        return encodedImage;

    private void uploadImage() {
        //Showing the progress dialog
        final ProgressDialog loading = ProgressDialog.show(this, "Uploading...", "Please wait...", false, false);
        StringRequest stringRequest = new StringRequest(Request.Method.POST, UPLOAD_URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String s) {
                        //Disimissing the progress dialog
                        loading.dismiss();
                        //Showing toast message of the response
                        Toast.makeText(Main6Activity.this, s, Toast.LENGTH_LONG).show();
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError volleyError) {
                        //Dismissing the progress dialog
                        loading.dismiss();

                        //Showing toast
                        Toast.makeText(Main6Activity.this, volleyError.getMessage().toString(), Toast.LENGTH_LONG).show();
                    }
                }) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                //Converting Bitmap to String
                String image = getStringImage(bitmap);

                //Getting Image Name
                String name = editTextName.getText().toString().trim();

                //Creating parameters
                Map<String, String> params = new Hashtable<String, String>();

                //Adding parameters
                params.put(KEY_IMAGE, image);
                params.put(KEY_NAME, name);

                //returning parameters
                return params;
            }
        };


        RequestQueue requestQueue = Volley.newRequestQueue(this);


        //Adding request to the queue
        requestQueue.add(stringRequest);
    }

    private void showFileChooser() {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
            Uri filePath = data.getData();
            try {
                //Getting the Bitmap from Gallery
                bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
                //Setting the Bitmap to ImageView
                imageView.setImageBitmap(bitmap);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }


    }

    @Override
    public void onClick(View v) {

        if (v == buttonChoose) {
            showFileChooser();
        }

        if (v == buttonUpload) {
            uploadImage();


        }
    }


}

谢谢你的帮助，我们将不胜感激。出于某种原因，在@overide部分，它表示＆＃39;方法不会覆盖来自它的超类的方法＆＃39;。我该如何解决这个问题？

Answer 1

这意味着你的方法声明不完美，可能缺少某些部分。查看引发错误的方法，并在网上搜索此强制方法的模式声明。

Answer 2

我认为“不覆盖”抱怨是针对onClick（）方法的。 AppCompatActivity没有这样的方法。您的Main6Activity类需要实现View.OnClickListener接口，如下所示：

public class Main6Activity extends AppCompatActivity implements View.OnClickListener {

出于某种原因，在@overide部分，它表示＆＃39;方法不会覆盖来自它的超类的方法＆＃39;。我该如何解决这个问题？

2 个答案: