Android Studio文件上传按钮无响应问题求助

我开发了一款支持实时拍照或从手机上传图片的分类应用，相机功能运行正常（仅偶尔存在图片旋转问题），拍照后能正常将图片传入模型处理，但上传按钮点击后无任何实际反应——仅能看到按钮被点击的状态，既无报错信息，调试器也没有异常输出。

我刚接触Android Studio，但具备Python开发经验。

已排查内容 #

• 权限配置：Manifest文件中已添加读取、管理、写入外部存储权限及ACCESS_WIFI_STATE权限
• 尝试过重写文件路径
• 核对过按钮名称拼写

相关代码片段 #

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

    // Initialize UI elements
    result = findViewById(R.id.result);
    confidence = findViewById(R.id.confidence);
    imageView = findViewById(R.id.imageView);
    picture = findViewById(R.id.button);
    uploadButton = findViewById(R.id.uploadButton);

    // Ensure necessary permissions
    checkAndRequestPermissions();

    // Set listeners for the buttons
    picture.setOnClickListener(view -> {
        if (checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
            // Launch camera
            Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(cameraIntent, 1);
        } else {
            // Request camera permission
            requestPermissions(new String[]{Manifest.permission.CAMERA}, 100);
        }
    });

    uploadButton.setOnClickListener(view -> {
        if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
            // Open gallery
            Intent pickPhoto = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
            startActivityForResult(pickPhoto, 2);
        } else {
            // Request storage permission
            requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 101);
        }
    });
}


private void checkAndRequestPermissions() {
    // Check and request camera and external storage permissions
    if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
        requestPermissions(new String[]{Manifest.permission.CAMERA}, 100);
    }

    if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
        requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 101);
    }
}
private String saveImageToTemporaryFile(Bitmap image) {
    String filePath = null;
    try {
        File tempFile = File.createTempFile("temp_image", ".jpg", getCacheDir());
        FileOutputStream out = new FileOutputStream(tempFile);
        image.compress(Bitmap.CompressFormat.JPEG, 100, out);
        out.flush();
        out.close();
        filePath = tempFile.getAbsolutePath();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return filePath;
}

private String getRealPathFromURI(Uri uri) {
    String filePath;
    Cursor cursor = getContentResolver().query(uri, null, null, null, null);
    if (cursor == null) {
        filePath = uri.getPath();
    } else {
        cursor.moveToFirst();
        int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
        filePath = cursor.getString(idx);
        cursor.close();
    }
    return filePath;
}

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

    if (requestCode == 1 && resultCode == RESULT_OK && data != null) {

        Bitmap image = (Bitmap) data.getExtras().get("data");
        String imagePath = saveImageToTemporaryFile(image);
        processImage(image, imagePath);


    } else if (requestCode == 2 && resultCode == RESULT_OK && data != null) {
        // Handle gallery result
        try {
            InputStream imageStream = getContentResolver().openInputStream(data.getData());
            Bitmap image = BitmapFactory.decodeStream(imageStream);
            String imagePath = getRealPathFromURI(data.getData());
            processImage(image, imagePath);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

针对上传按钮无响应的问题，结合你的代码和Android版本兼容性问题，可按以下步骤修复：

1. 适配Android 13+的媒体权限 #

从Android 13（API 33）开始，READ_EXTERNAL_STORAGE权限被废弃，读取图片需使用READ_MEDIA_IMAGES权限：

• 在Manifest中添加权限：

  <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
  

• 修改按钮点击逻辑，做版本判断：

  uploadButton.setOnClickListener(view -> {
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
          if (checkSelfPermission(Manifest.permission.READ_MEDIA_IMAGES) == PackageManager.PERMISSION_GRANTED) {
              openGallery();
          } else {
              requestPermissions(new String[]{Manifest.permission.READ_MEDIA_IMAGES}, 101);
          }
      } else {
          if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
              openGallery();
          } else {
              requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 101);
          }
      }
  });
  
  // 抽离打开图库逻辑，避免重复代码
  private void openGallery() {
      Intent pickPhoto = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
      startActivityForResult(pickPhoto, 2);
  }
  

2. 补充权限申请回调逻辑 #

权限请求是异步操作，用户授权后需手动触发打开图库，重写onRequestPermissionsResult方法：

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == 101) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            openGallery();
        } else {
            Toast.makeText(this, "需要图片权限才能使用上传功能", Toast.LENGTH_SHORT).show();
        }
    }
}

3. 修复过时路径获取逻辑 #

Android 10（API 29）后MediaStore.Images.ImageColumns.DATA被废弃，直接获取路径会失效，改用Uri转临时文件的方式：

// 替换原getRealPathFromURI方法，新增Uri转临时文件逻辑
private String saveUriToTempFile(Uri uri) throws IOException {
    File tempFile = File.createTempFile("temp_upload", ".jpg", getCacheDir());
    InputStream in = getContentResolver().openInputStream(uri);
    FileOutputStream out = new FileOutputStream(tempFile);
    byte[] buffer = new byte[1024];
    int read;
    while ((read = in.read(buffer)) != -1) {
        out.write(buffer, 0, read);
    }
    in.close();
    out.close();
    return tempFile.getAbsolutePath();
}

// 修改onActivityResult中的上传分支
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == 1 && resultCode == RESULT_OK && data != null) {
        Bitmap image = (Bitmap) data.getExtras().get("data");
        String imagePath = saveImageToTemporaryFile(image);
        processImage(image, imagePath);
    } else if (requestCode == 2 && resultCode == RESULT_OK && data != null) {
        try {
            InputStream imageStream = getContentResolver().openInputStream(data.getData());
            Bitmap image = BitmapFactory.decodeStream(imageStream);
            String imagePath = saveUriToTempFile(data.getData());
            processImage(image, imagePath);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

内容的提问来源于stack exchange，提问作者Pips 'n Chicks