Develop Reference

Empty ListView show another activity

I am making an application which uses ListView to show DB elements. But in the first opening or when user will delete everything DB will be empty and then ListView will show blank screen. I want to show a message when it happens. Not only TextView but also Button. For example "DB now empty. Click on button and try to add some records". ListView 's setEmptyView method allows to add only TextView . Is it really possible to create a layout and show it when ListView is empty?

You can use the property setEmptyView.
If the list is empty and your desired display.
ListView listView = (ListView) findViewById(R.id.lst);
View child = getLayoutInflater().inflate(R.layout.empty_view, null);
((ViewGroup)listView.getParent()).addView(child);
listView.setEmptyView(child);

You can dynamically add a button in the activity layout if your list is empty.
Set onClickListner on the button and override the onClick().
Refer below code:
LinearLayout linear = (LinearLayout)findViewById(R.id.layout);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
Button btn = new Button(this);
btn.setId("btnDynamic");
btn.setText("Go to create entry page");
linear.addView(btn, params);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Toast.makeText(view.getContext(),
"Button clicked index = " + id_, Toast.LENGTH_SHORT)
.show();
}
});
Let me know if this helps.

You can pre-define a layout containing text view and and button as you stated in your question and set it's visibility = gone in your xml or in java code. When the List View will be empty you can set visibility the visibility of the listview.setVisibility(View.GONE) and set your's layout (containing button and a textview) layout.setVisibility(View.VISIBLE)

removeViewAt does not work

I got a RelativeLayout and I'm trying to remove a view from it. I tried removeViewAt and removeView but the view is still there even after I call them. Do you guys know what could be wrong?
RelativeLayout v = (RelativeLayout)findViewById(R.id.container);
Button btn = new Button(this);
v.addView(btn);
v.removeView(btn);

how to make entire view in dialog clickable?

i have dialog and text inside eache view that i can click on .
i want all the view to be clickable insted only the text .
the code :
final Dialog dialog = new Dialog(List_Lists.this);
dialog.setContentView(R.layout.dialog_edit_tables);
dialog.setTitle("Action for " + table);
TextView delete = (TextView) dialog
.findViewById(R.id.tvDeleteTable);
TextView cancel = (TextView) dialog.findViewById(R.id.tvCancel);
OnClickListener l = new OnClickListener() {
#Override
public void onClick(View v) {
dbAdapter = new DBmethods(getApplicationContext());
switch (v.getId()) {
case R.id.tvDeleteTable:
viewListsAdapter.listsV.remove(pos);
dbAdapter.deleteTable(table);
break;
case R.id.tvCancel:
dialog.dismiss();
break;
case R.id.bTableRenameName:
if(dbAdapter.checkTableNameOK(List_Lists.this ,newName.getText().toString())){
viewListsAdapter.listsV.remove(pos);
viewListsAdapter.listsV.add(pos, newName.getText().toString().trim());
dbAdapter.renameTable(table , newName.getText().toString().trim());
renamedialog.dismiss();
};
break;
default:
break;
}
// if button is clicked, close the custom dialog
dialog.dismiss();
lv.invalidateViews();
}
};
delete.setOnClickListener(l);
cancel.setOnClickListener(l);
dialog.show();
}
});
}
as i said this code work fine if user press on text inside the view , but the empty view obviously wont respond . thanks !
if user press on red spot it activate the enter , if green than duplicate and so on...the current status is u have to press on the word , if u press on the colored spots it will do nothing

If im not wrong you need this to make layout clickable
try something like this
You can add a OnClickListener on it :
//onCreate
LinearLayout layout = (LinearLayout) findViewById(R.id.LinearLayout01);
layout.setOnClickListener(yourOnClickListener);
Should be working ;)

create an id of your dialog_edit_tables
let say android:id=#+id\testing in your xml.
now write this
LinearLayout yourlayout = (LinearLayout) findViewById(R.id.testing);
yourlayout.setOnClickListener(l);
hope this will help.

You haven't shown the XML layout but setting the width of the clickable text view to fill_parent should work, also make sure your parent layout also has the width set to fill_parent.
The onClickListener is not based on the text it is based on the actual component, therefore it looks as if the layout_width attribute is set to wrap_content, so the component is only then length of the text, therefore only where the text is, is clickable. Hope this makes sense.

If I am not wrong than you are using listview or tableview to display the text.
You can do one thing. Make the textview layout_width as fill_parent That way you will able to get the touch on the place that you marked.
Hope this will help.

Android Popup with EditText, keyboard blocks text, background scrolls

I have a Popup which holds a couple of EditTexts in a ScrollView.
When i click on an EditText it scrolls up the View in background, not the Popup, therefore the keyboard blocks the EditText.
Any ideas ?
PopupWindow popUp = new PopupWindow(this);
popUp.update(0, 0, display.getWidth(), display.getHeight());
popUp.setFocusable(true);
LinearLayout llh = new LinearLayout(this)
llh.setOrientation(LinearLayout.HORIZONTAL);
ScrollView sv = new ScrollView(this);
EditText e1,e2,e3...
llh.addView(e1);
llh.addView(e2);
llh.addView(e3);
...
sv.addView(llh);
popUp.setContentView(llh);
popUp.showAtLocation(llh, Gravity.BOTTOM, 0, 0);
This is "launched" from a View which holds a ScrollView aswell.
If there is a workaround for this, it would be great.

I have faced the same problem as you, and to solve it, i created a custom Dialog and with a custom theme (R.style.ThemeDialogCustom in the following example). I also set dialog.requestWindowFeature(Window.FEATURE_NO_TITLE) and dialog.setCanceledOnTouchOutside(true); and i set a custom layout with setContentView. Something like this:
Dialog dialog = new Dialog(activityContext, R.style.ThemeDialogCustom);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setCanceledOnTouchOutside(true);
dialog.setContentView(R.layout.custom_dialog_layout);
In other words, the above piece of code tries to immitate the behavior of a PopupWindow.
EDIT For clarification purposes, if you need to access a view that was defined in the dialog's custom layout, you can access it like this:
EditText e1 = (EditText) dialog.findViewById(R.id.e1);
Hope that helps.

Dynamically changing layout in application

I want my users to have the ability to choose a few buttons which would be transferred to a different page, like a "favourite buttons" page. To do this, I need to change the layout from the app. I would like the modified layout to persist even after closing the app. Is it possible to do this?

For This you should make some activity with different layout.
If you don't want to add more activity just use this:
private void SwitchLayout2()
{
RelativeLayout Layout1 = (RelativeLayout)findViewById(R.id.layout1);
RelativeLayout Layout2 = (RelativeLayout)findViewById(R.id.layout2);
// Enable Layout 2 and Disable Layout 1
Layout1 .setVisibility(View.GONE);
Layout2.setVisibility(View.VISIBLE);
}
private void SwitchLayout1()
{
RelativeLayout Layout1 = (RelativeLayout)findViewById(R.id.layout1);
RelativeLayout Layout2 = (RelativeLayout)findViewById(R.id.layout2);
// Enable Layout 1 & Disable Layout2
Layout1.setVisibility(View.VISIBLE);
Layout2.setVisibility(View.GONE);
}