Java 如何获取图像(URI)的路径并将其发送到数据库?
如果我点击按钮,我有一个代码来获取图像,在我的问题中,我想获取图像的URI/路径并将其发送到数据库,然后我想在ImageView中显示它。这是我的密码Java 如何获取图像(URI)的路径并将其发送到数据库?,java,android,xml,Java,Android,Xml,如果我点击按钮,我有一个代码来获取图像,在我的问题中,我想获取图像的URI/路径并将其发送到数据库,然后我想在ImageView中显示它。这是我的密码 @Override public void onActivityResult(int req, int res, Intent imageIntent) { super.onActivityResult(req, res, imageIntent); switch (req) { case SELE
@Override
public void onActivityResult(int req, int res, Intent imageIntent) {
super.onActivityResult(req, res, imageIntent);
switch (req) {
case SELECT_ICON:
if (res == RESULT_OK) {
try {
final Uri iconUri = imageIntent.getData();
final String imgUri = iconUri.toString();
final InputStream iconStream = getContentResolver().openInputStream(iconUri);
final Bitmap selectedIcon = BitmapFactory.decodeStream(iconStream);
imageView.setImageBitmap(selectedIcon);
saveButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
String tname = text1.getText().toString();
String date = textView.getText().toString();
String priority = spinner1.getSelectedItem().toString();
String notes = text2.getText().toString();
String path = imgUri;
dbHelper.addTask(new Task(tname, date, priority, notes, path));
Toast.makeText(getApplicationContext(), "Success!!!", Toast.LENGTH_LONG).show();
TaskListActivity.tasklist.RefreshList();
finish();
}
});
} catch (FileNotFoundException err) {
err.printStackTrace();
}
}
}
}
我使用这些方法从URI获取路径
private String getActualFilePath(Context context, Uri fileUri) throws URISyntaxException{
Uri uri = Uri.parse(fileUri);
final boolean needToCheckUri = Build.VERSION.SDK_INT >= 19;
String selection = null;
String[] selectionArgs = null;
// Uri is different in versions after KITKAT (Android 4.4), we need to
// deal with different Uris.
if (needToCheckUri && DocumentsContract.isDocumentUri(context.getApplicationContext(), uri)) {
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
return Environment.getExternalStorageDirectory() + "/" + split[1];
} else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
uri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
} else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("image".equals(type)) {
uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
selection = "_id=?";
selectionArgs = new String[]{ split[1] };
}
}
if ("content".equalsIgnoreCase(uri.getScheme())) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = null;
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
if (cursor.moveToFirst()) {
return cursor.getString(column_index);
}
} catch (Exception e) {
}
} else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
private void LogException(Exception ex){
if(ex != null){
try{
ex.printStackTrace(logPrintWriter);
String data = logStringWriter.toString();
AddErrorLogEntry(data);
}finally {
Log.d(TAG, "Logged exception in file");
}
}
}
您可以使用String-strUri=uri.toString将uri转换为字符串将此strUri保存到数据库,在从数据库检索时,您可以使用uri-uri=uri.parsestrUri将字符串转换回uri查看库以加载图像您的问题是什么?你是否有任何异常或其他情况我想从存储器中选取一个图像,并将该图像的路径保存到数据库中,我想显示该图像及其到ImageView的路径你有最终的Uri iconUri,你还需要什么?我想将iconUri放入数据库似乎只是覆盖了现有的数据库,我通过重新安装应用程序来修复它。我想检索uri,有什么问题吗?字符串解析=cursor.getString4;Uri=Uri.parseparse;imageView.setImageURIuri;不很好,如果你现在有错误的话。请ping,但图像仍然没有显示