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我使用这段代码从图库中获取图像，然后在保存之前裁剪图像。它运行良好，适用于内置画廊的 android，但在 onActivityResult 方法中给出 NullPointerException，我们在 android 上使用谷歌照片应用程序获得 extras.getParcelable("data")。任何帮助，将不胜感激。先谢谢了

//This is called in oncreate() on clicking the upload from gallery button.
Intent galleryIntent = new Intent(Intent.ACTION_PICK ,    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
galleryIntent.setType("image/*");
galleryIntent.putExtra("crop", "true");
startActivityForResult(galleryIntent,PICK_FROM_FILE);

//This is called on onActivityResult() method
if (requestCode == PICK_FROM_FILE && data != null) {
    Bundle extras = data.getExtras();
    //get the cropped bitmap from extras
    Bitmap thePic = extras.getParcelable("data");
    //do whatever with thePic
}
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1 回答 1

1

它对我有用。

//This is my onActivityResult method.
if (resultCode == RESULT_OK && data != null) {
    final Uri selectedImage = data.getData();

    String root = Environment.getExternalStorageDirectory().getAbsolutePath() + "/";
    File createDir = new File(root + "AppName" + File.separator);
    if (!createDir.exists()) {
        createDir.mkdirs();
    }
    SimpleDateFormat s = new SimpleDateFormat("ddMMyyyhhmmss");
    String format = s.format(new Date());
    File file = new File(root + "AppName" + File.separator + format);

    if (!file.exists()) {
        try {
            file.createNewFile();
            copyFile(new File(getRealPathFromURI(selectedImage)), file);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    String filePath = file.GetAbsolutePath();
    Bitmap bitmap = BitmapFactory.decodeFile(filepath);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 85, bos);
    int height = bitmap.getHeight();
    int width = bitmap.getWidth();
    Bitmap bmp = Bitmap.createScaledBitmap(bitmap, 100, 100, true);

    mImageView.setImageBitmap(bmp);

}

这是我在此使用的 copyFile 方法。

private void copyFile(File sourceFile, File destFile) throws IOException {
    if (!sourceFile.exists()) {
        return;
    }

    FileChannel source = null;
    FileChannel destination = null;
    source = new FileInputStream(sourceFile).getChannel();
    destination = new FileOutputStream(destFile).getChannel();
    if (destination != null && source != null) {
        destination.transferFrom(source, 0, source.size());
    }
    if (source != null) {
        source.close();
    }
    if (destination != null) {
        destination.close();
    }
}

希望它也适用于你：D

于 2016-02-12T17:38:41.193 回答