Question

我正在使用这些代码在点击按钮上捕获和存储图像。

takePhoto.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        destination = new File(Environment
                .getExternalStorageDirectory(), 
                preferences.getSelectedItem().getItemNo() + "_" 
                + preferences.getSelectedItem().getChasisNo() + "_up");
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT,
                Uri.fromFile(destination));
        startActivityForResult(intent, TAKE_PHOTO_CODE);
    }
});

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

    if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK) {
        FileInputStream in;
        try {
            in = new FileInputStream(destination);
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inSampleSize = 10;
            imgPath = destination.getAbsolutePath();
            // Bitmap bmp = BitmapFactory.decodeStream(in, null, options);
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        Log.d("Image saved", "Image saved at " + imgPath);
        upItem.setUpPhotoURL(String.valueOf(imgPath));
        isPhotoAttached = true;
    }
}

但是当我拍摄照片并尝试确认时，应用程序什么都不做。取消和重新选择选项工作完美，但确认拍摄的图像不起作用。谁能指出我问题出在哪里？

Answer 1

在您的清单文件中添加了此权限

<uses-feature android:name="android.hardware.camera" />

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK) {
    String[] projection = { MediaStore.Images.Media.DATA}; 
    @SuppressWarnings("deprecation")
    Cursor cursor = managedQuery(mCapturedImageURI, projection, null, null, null); 
    int column_index_data = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); 
    cursor.moveToFirst();
    String capturedImageFilePath = cursor.getString(column_index_data);

Toast.makeText(this, capturedImageFilePath, Toast.LENGTH_SHORT).show();

}

Answer 2

试试这个

String mCurrentPhotoPath = destination.getAbsolutePath();

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);

    switch (requestCode) {
    case TAKE_PHOTO_CODE: {
        if (resultCode == RESULT_OK) {

            if (mCurrentPhotoPath != null) {
                getBitmap(mCurrentPhotoPath);
            }
        }
        break;
    }

    default:

        break;
    }

}

private Bitmap getBitmap(String mCurrentPhotoPath) {

    /* There isn't enough memory to open up more than a couple camera photos */
    /* So pre-scale the target bitmap into which the file is decoded */

    /* Get the size of the ImageView */
    int targetW = imageView.getMeasuredWidth();
    int targetH = imageView.getMeasuredHeight();

    /* Get the size of the image */
    BitmapFactory.Options bmOptions = new BitmapFactory.Options();
    bmOptions.inJustDecodeBounds = true;
    Bitmap oribitmap = BitmapFactory.decodeFile(mCurrentPhotoPath,
            bmOptions);
    int photoW = bmOptions.outWidth;
    int photoH = bmOptions.outHeight;

    /* Figure out which way needs to be reduced less */
    int scaleFactor = 3;

    /* Set bitmap options to scale the image decode target */
    bmOptions.inJustDecodeBounds = false;
    bmOptions.inSampleSize = scaleFactor;
    bmOptions.inPurgeable = true;

    /* Decode the JPEG file into a Bitmap */
    return oribitmap = BitmapFactory.decodeFile(mCurrentPhotoPath,
            bmOptions);

}

清单文件中的此权限

<uses-feature android:name="android.hardware.camera" />

Answer 3

我认为这不起作用，因为图片的名称太大了。我改变了这个

destination = new File(Environment.getExternalStorageDirectory(), 
                preferences.getSelectedItem().getItemNo() + "_" 
                + preferences.getSelectedItem().getChasisNo() + "_up");

到这个

destination = new File(Environment.getExternalStorageDirectory(), 
                preferences.getSelectedItem().getChasisNo() + ".jpg");

我不确定图像名称是否过大，但这种变化对我有用

捕获和存储照片不起作用 - Android

3 个答案: