I have a hamburger icon which I will use it to navigate masterdetailpage.master part. I couldnt make sure how to write syntax under of the click event. Any ideas?
You could use the custom renderer to reset the hamburger icon of imagebutton.
[assembly: ExportRenderer(typeof(MainPage ), typeof(MasterDetailPageRenderer_Droid))]
namespace MasterDetailPageDemo.Droid
{
class MasterDetailPageRenderer_Droid:MasterDetailPageRenderer
{
public Android.Support.V7.Widget.Toolbar toolbar;
public Activity context;
public MasterDetailPageRenderer_Droid(Context context) : base(context)
{
}
protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
base.OnLayout(changed, l, t, r, b);
context = (Activity)Forms.Context;
toolbar = context.FindViewById<Android.Support.V7.Widget.Toolbar>(Droid.Resource.Id.toolbar);
if (toolbar != null)
{
for (var i = 0; i < toolbar.ChildCount; i++)
{
var imageButton = toolbar.GetChildAt(i) as Android.Widget.ImageButton;
var drawerArrow = imageButton?.Drawable as DrawerArrowDrawable;
if (drawerArrow == null)
continue;
imageButton.SetImageDrawable(Forms.Context.GetDrawable(Resource.Drawable.star_small));
}
}
}
}
Related
i have created an android application using xamarin.android. the application has a recyclerview that contains a spinner. what i want is when the user selects an item from the spinner, i need to change the value of the corresponding column and row in the datatable and i need the new value to be displayed in the spinner in the recyclerview in the row where the spinner value is selected. the problem is that whenever a value is selected, when another row is clicked, the old value of the spinner is displayed. i tried a lot of ways like the code in the following link: https://www.codeproject.com/articles/1033283/android-recycler-view-with-spinner-item-change-sel, but it didn't work. this is my code:
public class recyclerview_viewholder : RecyclerView.ViewHolder
{
public TextView rownbr, laborname;
public EditText overtime;
public LinearLayout linearLayout;
public Spinner days;
public recyclerview_viewholder(View itemView, Action<int> listener)
: base(itemView)
{
rownbr = itemView.FindViewById<TextView>(Resource.Id.rownbr);
laborname = itemView.FindViewById<TextView>(Resource.Id.laborname);
days = itemView.FindViewById<Spinner>(Resource.Id.days);
overtime = itemView.FindViewById<EditText>(Resource.Id.overtime);
linearLayout = itemView.FindViewById<LinearLayout>(Resource.Id.linearLayout);
itemView.Click += (sender, e) => listener(base.LayoutPosition);
}
public class recyclerviewAdapter : RecyclerView.Adapter
{
// Event handler for item clicks:
public event EventHandler<int> ItemClick;
// public event EventHandler<AdapterView.ItemSelectedEventArgs> SpinnerItemSelectionChanged;
public static DataTable summary_Requests = new DataTable();
//Context context;
public readonly new_schedule context;
public static int selected_pos = -1;
RecyclerView recyclerView;
FloatingActionButton delete;
public recyclerviewAdapter(new_schedule context, DataTable sum_req, RecyclerView recyclerView)
{
this.context = context;
summary_Requests = sum_req;
this.recyclerView = recyclerView;
}
public override RecyclerView.ViewHolder
OnCreateViewHolder(ViewGroup parent, int viewType)
{
View itemView = LayoutInflater.From(parent.Context).
Inflate(Resource.Layout.recycler_view_new_schedule_data, parent, false);
recyclerview_viewholder vh = new recyclerview_viewholder(itemView, OnClick);
vh.days.ItemSelected += (sender, e) =>
{
Spinner spinner = (Spinner)sender;
int position = Convert.ToInt32(spinner.Tag);
summary_Requests.Rows[position]["dayNbr"] = Convert.ToDecimal(spinner.GetItemAtPosition(e.Position).ToString());
};
vh.overtime.TextChanged += (sender, e) =>
{
if (vh.overtime.Text != "")
try
{
int position = vh.LayoutPosition;
summary_Requests.Rows[position]["overtimeHours"] = Convert.ToInt32(vh.overtime.Text);
user.zero_val = "Not_exist";
}
catch (System.FormatException exp)
{
var icon = AppCompatResources.GetDrawable(context.Context, Resource.Drawable.error_ic);
icon.SetBounds(0, 0, 50, 50);
vh.overtime.SetError("unit must be integer not decimal", icon);
user.zero_val = "exits";
}
else if (vh.overtime.Text == "")
{
var icon = AppCompatResources.GetDrawable(context.Context, Resource.Drawable.error_ic);
icon.SetBounds(0, 0, 50, 50);
vh.overtime.SetError("value can not be empty", icon);
user.zero_val = "exits";
}
};
return vh;
}
public override void
OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
{
recyclerview_viewholder vh = holder as recyclerview_viewholder;
vh.rownbr.Text = summary_Requests.Rows[position]["rowNumber"].ToString();
vh.laborname.Text = summary_Requests.Rows[position]["laborerName"].ToString();
List<decimal> days_data = new List<decimal>();
days_data.Add((decimal)0.5);
days_data.Add((decimal)1);
var adapter = new ArrayAdapter(this.context.Context, Android.Resource.Layout.SimpleSpinnerItem, days_data);
adapter.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem);
vh.days.Tag = position;
vh.days.Adapter = adapter;
vh.days.SetSelection(1);
vh.overtime.Text = summary_Requests.Rows[position]["overtimeHours"].ToString();
if (selected_pos == position)
vh.ItemView.SetBackgroundColor(Color.ParseColor("#4fa5d5"));
else
vh.ItemView.SetBackgroundColor(Color.LightGray);
vh.ItemView.Click += (sender, e) =>
{
int pos = vh.LayoutPosition;
user.del_pos = position;
selected_pos = position;
NotifyDataSetChanged();
//fill global variables that need to be passed to detail fragment
};
//delete.Click += delegate
//{
// vh.days.Enabled = false;
//};
}
public DataTable get_dt_final()
{
DataTable final_dt = summary_Requests.Copy();
return final_dt;
}
public override long GetItemId(int position)
{
return position;
}
public void deleteItem(int index)
{
summary_Requests.Rows.RemoveAt(index);
NotifyItemRemoved(index);
}
public override int ItemCount
{
get { return summary_Requests.Rows.Count; }
}
// Raise an event when the item-click takes place:
void OnClick(int position)
{
if (ItemClick != null)
ItemClick(this, position);
// user.req_pos = position;
}
}
}
}
I read the article that you provide, you need to do two things when you change spinner value, firstly, you need to change vegeList's itemPosition quantity by SpinnerItemSelectionChangedEvent, then you need to update TotalAmount in OnBindViewHolder
private void SpinnerItemSelectionChangedEvent(object sender, AdapterView.ItemSelectedEventArgs e)
{
Spinner spinner = (Spinner)sender;
var itemPosition = Convert.ToInt32(spinner.Tag);
//Update the view by Total Amount, after spinner value is been selected.
var currentquantity = vegeList[itemPosition].Quantity;
var selectedQuantity = Convert.ToInt32(spinner.GetItemAtPosition(e.Position).ToString());
if (currentquantity != selectedQuantity)
{
vegeList[itemPosition].Quantity = selectedQuantity;
Madapter.NotifyItemChanged(itemPosition);
}
}
public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
{
var item = Items[position];
var vh = holder as VegeViewHolder;
var spinnerPos = 0;
var adapter = new ArrayAdapter<String>(Context, Android.Resource.Layout.SimpleSpinnerItem, _quantity);
adapter.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem);
vh.Name.Text = item.Name;
vh.Price.Text = string.Format("Price: ${0}", item.Price);
vh.ItemView.Tag = position;
if (item.Quantity > 0)
{
spinnerPos = adapter.GetPosition(item.Quantity.ToString());
vh.TotalAmount.Text = string.Format("${0}", item.Price * item.Quantity);
}
else
{
vh.TotalAmount.Text = "";
}
vh.Quantity.Tag = position; //keep reference to list view row position
vh.Quantity.Adapter = adapter;
vh.Quantity.SetSelection(spinnerPos);
vh.Image.SetImageResource(item.ImageId);
}
I need to set up a simulation of a nuclear power plant in JavaFX. The GUI is working perfectly, but I've got problems with getting the simulation run. I have to use a Timeline (as EventHandler) for this, the handler updates the radiation value in each cell every single tick. The radiation is displayed as a circle on each cell. The higher the radiation, the bigger should the circle be. For this, I made an if-else-statement.
The problem is: The if-statement cannot access the variables from the EventHandler. But this is necessary to update the circle size each tick. I already tried to put the if-statements right into the EventHandler, but then, no circles have been shown anymore on my GUI.
These are the three classes so far:
EDIT: I put the if-statements into the Event Handler, new code below.
import javafx.application.Application;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;
public class NuclearPowerPlant extends Application {
private static final int HEIGHT = 50;
private static final int WIDTH = 55;
private static final int CELL_SIZE = 40;
#Override
public void start(Stage stage) {
stage.setScene(new Scene(createContent()));
stage.show();
}
private Parent createContent() {
Pane root = new Pane();
root.setPrefSize((WIDTH - 40) * CELL_SIZE, (HEIGHT - 40) * CELL_SIZE); // Size of displayed window
for (int y = 0; y < HEIGHT; y++) {
for (int x = 0; x < WIDTH; x++) {
Cell cell = new Cell(x, y);
root.getChildren().add(cell);
}
}
return root;
}
public static void main(String[] args) {
launch(args);
}
}
Cell:
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.MenuItem;
import javafx.scene.input.ContextMenuEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.util.Duration;
public class Cell extends StackPane {
private static final int CELL_SIZE = 40;
int x;
int y;
private Rectangle cell;
private Circle radiation; // Radiation is displayed as a circle
int circlesize; // Size of the circle (the higher the radiation, the bigger the circle)
double radiationvalue = 5000; // Initializing of the radiation value of all cells at the beginning (air in all cells)
private Text symbol; // For Explosion
double activity;
double reflection;
public Cell(int x, int y) { // Konstruktor fuer die Zelle
setTranslateX(x * CELL_SIZE);
setTranslateY(y * CELL_SIZE);
cell = new Rectangle(CELL_SIZE - 2, CELL_SIZE - 2, Color.BLUE);
cell.setStroke(Color.WHITE);
EventHandler<ActionEvent> handlerUpdateRadiationvalue = event -> {
double newradiationvalue = activity + reflection * 500;
// System.out.println(newradiationvalue);
if (newradiationvalue < 1000) {
this.circlesize = 2;
} else if (newradiationvalue >= 1000 && newradiationvalue < 3000) {
this.circlesize = 5;
} else if (newradiationvalue >= 3000 && newradiationvalue < 5000) {
this.circlesize = 8;
} else if (newradiationvalue >= 5000 && newradiationvalue < 7000) {
this.circlesize = 11;
} else if (newradiationvalue >= 7000 && newradiationvalue < 9000) {
this.circlesize = 14;
} else if (newradiationvalue >= 9000 && newradiationvalue < 10000) {
this.circlesize = 18;
}
// Explosion:
else if (newradiationvalue >= 10000) {
circlesize = 0;
cell.setFill(Color.RED);
symbol = new Text("X");
symbol.setFont(Font.font(38));
}
};
KeyFrame keyframe = new KeyFrame(Duration.seconds(0.02), handlerUpdateRadiationvalue);
Timeline tl = new Timeline();
tl.getKeyFrames().addAll(keyframe);
tl.setCycleCount(Timeline.INDEFINITE);
tl.play();
radiation = new Circle(circlesize, Color.BLACK);
getChildren().add(cell);
if (radiationvalue < 10000) {
getChildren().add(radiation);
} else {
getChildren().add(symbol);
}
// Context Menu for material change:
ContextMenu contextMenu = new ContextMenu();
MenuItem air = new MenuItem("Luft");
air.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
activity = Material.AIR.getActivity();
reflection = Material.AIR.getReflection();
cell.setFill(Color.BLUE);
}
});
MenuItem uranium = new MenuItem("Uran");
uranium.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
activity = Material.URANIUM.getActivity();
reflection = Material.URANIUM.getReflection();
cell.setFill(Color.GREEN);
}
});
MenuItem lead = new MenuItem("Blei");
lead.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
activity = Material.LEAD.getActivity();
reflection = Material.LEAD.getReflection();
cell.setFill(Color.GREY);
}
});
MenuItem ruleblock = new MenuItem("Regelblock");
ruleblock.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
activity = Material.RULEBLOCK.getActivity();
reflection = Material.RULEBLOCK.getReflection();
cell.setFill(Color.YELLOW);
}
});
contextMenu.getItems().addAll(air, uranium, lead, ruleblock);
cell.setOnContextMenuRequested(new EventHandler<ContextMenuEvent>() {
#Override
public void handle(ContextMenuEvent event) {
contextMenu.show(cell, event.getScreenX(), event.getScreenY());
}
});
}
ENUM:
public enum Material {
AIR (0, 0.99),
URANIUM (1, 1.12),
LEAD (0, 0.7),
RULEBLOCK (0, 0.99);
double activity;
double reflection;
private Material(double activity, double reflection) {
this.activity = activity;
this.reflection = reflection;
}
double getActivity() {
return activity;
}
public void setActivity(double activity) {
this.activity = activity;
}
double getReflection() {
return reflection;
}
public void setReflection(double reflection) {
this.reflection = reflection;
}
}
The if statement always links to the global variable "radiationvalue" instead of the updated value in the event handler. If I try to access the 'newradiationvalue' in the if statement, I get an error that no such variable can be found (because the one in the Event Handler is not visible from outside).
Maybe someone can tell me how to access the variables in the event handler from outside the event handler?! And if it's not possible: How do I need to change my program to make this work as I want?
Thanks very much in advance!
i set text and textsize from edittextbox i get perfect size as i selected but whenever i set different textsize for another text it takes same textsize for both text as second textsize...i want text as selected textsize form spinner...help...
Thank u in advance
here is my code of alertdialogbox and spinner `
LayoutInflater linf = LayoutInflater.from(c_new);
final View inflator = linf.inflate(R.layout.dialog, null);
AlertDialog.Builder alert = new AlertDialog.Builder(c_new);
alert.setTitle("EditText");
alert.setView(inflator);
final EditText editText = (EditText) inflator.findViewById(R.id.editTextResult);
alert.setPositiveButton("ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton)
{
srt=editText.getText().toString();
c.setEdittext(srt);
click_values c1 = new click_values();
c1.setImage(3);
dialog.cancel();
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.cancel();
}
});
alert.show();
final Spinner spinner = (Spinner)inflator.findViewById(R.id.mySpinner);
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_spinner_item,textSize);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String item = parent.getItemAtPosition(position).toString();
c.setTextsize(Float.parseFloat(item));
spinner.setPrompt("Select Text Size");
// Showing selected spinner item
Toast.makeText(parent.getContext(), "Selected Text Size: " + item, Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
spinner.setPrompt("Title");
}
});
here is the code for set and get edittext and textsize`
static String Edittext;
public static String getEdittext() {
return Edittext;
}
public static String setEdittext(String edittext) {
click_values.Edittext = edittext;
Edittext = edittext;
return edittext;
}
static float textsize;
public static float getTextsize() {
return textsize;
}
public static void setTextsize(float textsize) {
click_values.textsize = textsize;
}
here i how i store text and textsize `
ArrayList<EdtText> editTexts = new ArrayList<EdtText>();
ArrayList<Integer> textsize = new ArrayList<Integer>();
if (text_c == 0 && c.getImage() == 4) {
mPaint.setTextSize(c.getTextsize());
mPaint.setStyle(Style.FILL);
canvas.drawText(c.getEdittext(), startX, startY, mPaint);
c.setImage(0);
} else if (c.getImage() == 4) {
editTexts.add(new EdtText(c.getEdittext(), startX, startY));
mPaint.setTextSize(c.getTextsize());
mPaint.setStyle(Style.FILL);
canvas.drawText(c.getEdittext(), startX, startY, mPaint);
c.setImage(0);
text_c = 0;
}
for (EdtText l : editTexts) {
canvas.drawText(l.EdtText1, l.startX, l.stopY, mPaint);
}
}
I am trying to find a solution to allow a Hub to pan with the mouse when its reaches the left or right boundary. I have implemented the code below which i have gleaned from various sources.
` private void theHubPointerMoved(object sender, PointerRoutedEventArgs e)
{ Windows.UI.Xaml.Input.Pointer ptr = e.Pointer;
if (ptr.PointerDeviceType == Windows.Devices.Input.PointerDeviceType.Mouse)
{
Windows.UI.Input.PointerPoint ptrPt = e.GetCurrentPoint(null);
if (ptrPt.Position.X < this.ActualWidth - 20)
if (ptrPt.Position.X > 20)
{
//Do the SCROLLING HERE
var xcord = Math.Round(ptrPt.Position.X, 2);
var ycord = Math.Round(ptrPt.Position.Y, 2);
}
}
e.Handled = true;
}`
So it is relativley easy to see when the mouse is at the screen edge. I thought it would be easy to simply use the MyHub.ScrollViewer.ScrollToHorizontalOffset(xcord); but the Hub Scrollviewer doesnt expose this ScrollToHorizontalOffset function.
Can anyone assist?
Thanks.
Oh, it's exposed. If you can handle digging for it. Here's how:
http://xaml.codeplex.com/SourceControl/latest#Blog/201401-ScrollHub/MainPage.xaml.cs
In the example below, it is scrolling to a specific hub section. But you should be able to easily adapt it to your specific needs, I hope.
private void ScollHubToSection(Hub hub, HubSection section)
{
var visual = section.TransformToVisual(this.MyHub);
var point = visual.TransformPoint(new Point(0, 0));
var viewer = Helpers.FindChild<ScrollViewer>(hub, "ScrollViewer");
viewer.ChangeView(point.X, null, null);
}
Using this:
public class Helpers
{
public static T FindChild<T>(DependencyObject parent, string childName) where T : DependencyObject
{
if (parent == null) return null;
T foundChild = null;
int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < childrenCount; i++)
{
var child = VisualTreeHelper.GetChild(parent, i);
T childType = child as T;
if (childType == null)
{
foundChild = FindChild<T>(child, childName);
if (foundChild != null) break;
}
else if (!string.IsNullOrEmpty(childName))
{
var frameworkElement = child as FrameworkElement;
if (frameworkElement != null && frameworkElement.Name == childName)
{
foundChild = (T)child;
break;
}
}
else
{
foundChild = (T)child;
break;
}
}
return foundChild;
}
}
Best of luck!
I want to animate slide down and slide up on expandablelistview when I click the groupItem.Then I have finish the slide down.
public class ExpandAnimation extends Animation {
private static final String TAG = "ExpandAnimation";
private View mAnimatedView;
private LayoutParams mViewLayoutParams;
private int mMarginStart, mMarginEnd;
private boolean mIsVisibleAfter = false;
private boolean mWasEndedAlready = false;
/**
* Initialize the animation
* #param view The layout we want to animate
* #param duration The duration of the animation, in ms
*/
public ExpandAnimation(View view, int duration) {
setDuration(duration);
mAnimatedView = view;
mViewLayoutParams = (LayoutParams) view.getLayoutParams();
// if the bottom margin is 0,
// then after the animation will end it'll be negative, and invisible.
mIsVisibleAfter = (mViewLayoutParams.bottomMargin == 0);
mMarginStart = mViewLayoutParams.bottomMargin;
Log.i(TAG, "mMarginStart:>>>>>>>"+mMarginStart);
mMarginEnd = (mMarginStart == 0 ? (0- view.getHeight()) : 0);
Log.i(TAG, "mMarginEnd:>>>>>>>"+mMarginEnd);
view.setVisibility(View.VISIBLE);
}
#Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
super.applyTransformation(interpolatedTime, t);
Log.i(TAG, "applyTransformation-->"+interpolatedTime);
if (interpolatedTime < 1.0f) {
// Calculating the new bottom margin, and setting it
mViewLayoutParams.bottomMargin = mMarginStart
+ (int) ((mMarginEnd - mMarginStart) * interpolatedTime);
// Invalidating the layout, making us seeing the changes we made
mAnimatedView.requestLayout();
// Making sure we didn't run the ending before (it happens!)
} else if (!mWasEndedAlready) {
mViewLayoutParams.bottomMargin = mMarginEnd;
mAnimatedView.requestLayout();
if (mIsVisibleAfter) {
mAnimatedView.setVisibility(View.GONE);
}
mWasEndedAlready = true;
}
}
}
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
Log.i(TAG, "getChildView");
#SuppressWarnings("unchecked")
String text = ((Map<String, String>) getChild(groupPosition,
childPosition)).get("child");
if (convertView == null) {
LayoutInflater layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.child, null);
}
View toolbar = convertView.findViewById(R.id.toolbar);
setAnimationView(toolbar);
((LinearLayout.LayoutParams) toolbar.getLayoutParams()).bottomMargin = -75;
toolbar.setVisibility(View.GONE);
ExpandAnimation expandAni = new ExpandAnimation(toolbar, 1000);
toolbar.startAnimation(expandAni);
TextView tv = (TextView) convertView.findViewById(R.id.childTo);
tv.setText(text);
return convertView;
}
But when I click the groupItem to collapse the group,it doesn't call the getChildView() method.So how can I to call the getChildView() and let it slide up?
I believe that you want to extend BaseExpandableListAdapter if you want to call (or #Override) getChildView.
http://developer.android.com/reference/android/widget/BaseExpandableListAdapter.html