The title may sound confusing I know, I 'm adding a view everytime I click on a button, composed by a textview and a button. I'm setting every added view an ID with simply view.setID(++i) and every added button (inside the views) an ID simply with button.setID(++n), n starting at 1000, since I won't have more than 1000 added views.
Here's what I got:
public class MainActivity extends AppCompatActivity {
GridLayout gridLayout;
static int i;
static int n = 1000;
private Button theButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gridLayout = (GridLayout)findViewById(R.id.gamehistory);
Button b = (Button)findViewById(R.id.Button01);
b.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
theButton = new Button(MainActivity.this);
TextView theText = new TextView(MainActivity.this);
theText.setGravity(Gravity.CENTER_HORIZONTAL);
LinearLayout theLayout = new LinearLayout(MainActivity.this);
theLayout.setOrientation(LinearLayout.VERTICAL);
theLayout.setBackgroundColor(Color.parseColor("#8BAAC3"));
theLayout.setId(++i);
theButton.setId(++n);
theButton.setText(theButton.getId() + "");
theText.setText(theLayout.getId() + "");
theLayout.addView(theButton);
theLayout.addView(theText);
gridLayout.addView(theLayout);
GridLayout.LayoutParams lp = (GridLayout.LayoutParams) theLayout.getLayoutParams();
lp.setMargins(10, 10, 10, 10);
}
});
What I need is when I click on a button that was created, the correspondent view is destroyed, and the next views take one step back feeling the gap in the parent which is a GridLayout
Add this where you are adding views to GridLayout -
theLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
gridLayout.removeView(theLayout);
}
});
theButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
gridLayout.removeView(theLayout);
}
});
For this , you need to make theLayout final
final LinearLayout theLayout = new LinearLayout(LauncherActivity.this);
The simplest method would be.
View v = gridLayout.findViewById(<some id>);
gridLayout.removeView(v);
However it seems like you may want to consider using a RecyclerView. You can add/remove items from the Adapter and the views will be updated for you.
EDIT
When using A RecyclerView you have to specify two essential components.
RecyclerAdapter - This converts data into views (rows, cards, cells, ect.)
LayoutManger - Most common are LinearLayoutManger and GridLayoutManager which define how the views from the adapter are presented out in relation to one another, and handle scrolling.
There are a few more option additions you can can use if needed.
ItemDecoration - define backgrounds, or overlays for cells. (E.G. draw a gray background for every other view in a list)
ItemTouchHelper - does most of the heavy lifting for swipe (e.g. swipe to delete) and drag (e.g. drag to re-arrange) operations.
I would highly suggest getting familiar with the RecyclerView it should be your goto component when you need to display a list of items on the screen.
Related
I have a BottomSheet "buttomSheet" (in this sheet it is a list view that is GONE) and a normal Button "btnShowListView" (out from the "buttomSheet").
I want that when I click on "btnShowListView" the list view in the bottomSheet will be Visible its work but only after 2 clicks on button "btnShowListView"...
this is my code:
final View bottomSheetView = findViewById(R.id.bottomSheetLayout);
listView = (ListView) bottomSheet.findViewById(R.id.listView);
buttomSheet = BottomSheetBehavior.from(bottomSheetView);
btnShowListView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
listView.setVisibility(View.VISIBLE);
bottomSheetView.requestLayout();
bottomSheetView.invalidate();
bottomSheet.setState(BottomSheetBehavior.STATE_EXPANDED);
}
});
You can make the listview already visible, there's no need to hide it; you can get te same effect by setting the state of the bottom sheet behavior to HIDDEN.
I tested the code below and it should work also for you.
final View bottomSheetView = findViewById(R.id.bottomSheetLayout);
bottomSheetBehavior= BottomSheetBehavior.from(bottomSheetView);
bottomSheetBehavior.setHideable(true);
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
btnShowListView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
bottomSheet.setState(BottomSheetBehavior.STATE_EXPANDED);
}
});
I'm having a problem with this code. I need to dynamically add buttons to my layout. This code works fine, with one exception. The second button sits on top of the first. This must have something to do with LayoutParams, but I'm not sure what.
private void buttonmaker (Button button)
{
RelativeLayout.LayoutParams rlayout = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
rlayout.addRule(RelativeLayout.CENTER_VERTICAL);
rlayout.addRule(RelativeLayout.ALIGN_LEFT);
rlayout.width = 100;
button.setId(Atom.count);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int id = v.getId();
atoms[id].getname();
TextView textview = (TextView)findViewById(R.id.textView2);
textview.setText(textview.getText()+String.valueOf(atoms[id].getname()));
}
});
if (Atom.count > 1) rlayout.addRule(RelativeLayout.RIGHT_OF,Atom.count-1); else rlayout.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
button.setLayoutParams(rlayout);
RelativeLayout v = (RelativeLayout) findViewById(R.id.rlayout);
v.addView(button);
}
the problem is you set de button in the relativelayout, in this component the objects are being added one above the other, you try create linearlayout global with orientation vertical or horizontal depending on what you want and added buttons, and its all
I targeted the items in an action bar using ShowcaseView, but I can't target elements of a ListView! I tried that and it didn't work:
ShowcaseView sv = new ShowcaseView.Builder(this,true)
.setTarget(new ViewTarget(lv.getChildAt(1).findViewById(R.id.heart)))
// Here is where you supply the id of the action bar item you
// want to display
.setContentTitle("Heart")
.setContentText("Check the venues of your city")
.hideOnTouchOutside()
.build();
Very simple. Take the element in your ViewHolder then place the code for showing the ShowCaseView inside your bindView.
Don't forget to put different a different ID for each element in the list.
So you may try something like this.
public class ViewHolder extends RecyclerView.ViewHolder {
private TextView button;
public ViewHolder(final View itemView) {
super(itemView);
button = (Button) itemView.findViewById(R.id.list_button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
new MaterialShowcaseView.Builder(getActivity())
.setTarget(verifyButton)
.setDismissText("GOT IT")
.setContentText("Your text goes here")
.setDelay(100) // optional but starting animations immediately in onCreate can make them choppy
.singleUse(id + " define an unique id for each item of the list") // provide a unique ID used to ensure it is only shown once
.show();
}
});
}
}
}
To get more information you can check the library here.
My problem is I have a button and that button is doing create new textview but that textviews removing when i click back button. How I saved textviews in activity?
My java sourcecodes here
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.notlar);
Button btnNotEkle = (Button) findViewById(R.id.btnNotEkle);
final EditText etNot = new EditText(NotEkle.this);
final LinearLayout layoutNotlar = (LinearLayout) findViewById(R.id.layoutNotlar);
final TextView tv1 = (TextView) findViewById(R.id.tvnotOrtalama);
etNot.setInputType(InputType.TYPE_CLASS_NUMBER);
AlertDialog.Builder notEkle = new AlertDialog.Builder(NotEkle.this);
notEkle.setTitle("Notunuz");
notEkle.setView(etNot);
//Positive button
notEkle.setPositiveButton("Tamam", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
tvNot = new TextView(NotEkle.this);//girelen not burdaki textview e yazdırılacak.
girilenNot = etNot.getText().toString();//Girilen notu alıyoruz
tvNot.setText(girilenNot);//girilen notu textviewa veriyoruz
notTopla += Integer.parseInt(girilenNot);//Notları topluyoruz
layoutNotlar.addView(tvNot);
count = layoutNotlar.getChildCount();
dersOrtalamaYazdir=String.valueOf(dersOrtalama());
tv1.setText("Ders Ortalamanız : "+dersOrtalamaYazdir);
dialog.cancel();
}
});
final AlertDialog notEkleCreate = notEkle.create();
btnNotEkle.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
notEkleCreate.show();
}
});
}
}
Try giving your TextView objects ids.
You need to know that when you click back button - by default your activity is destroyed so all views are removed.
When you are adding new TextView you should add information about this TextView (like the text itself) to some list declared as field in your activity.
Then you can save this list when activity is recreated see: onSaveInstanceState/nRestoreInstanceState
You can also pass this list back or to new activity so that they can take actions based on this list.
Following my understanding your TextView had been created inside Dialog and after you press back button the dialog dismisses and all views you created inside will be removed and you can't access it from your Activity.
You may try to create TextView in onCreate, pass and in Dialog just call setText. I hope this is the answer you're looking for.
Cheers.
I'm trying to implement a ExpandableListView in java that when click deployment space elements inside, not the typical wish list allows choosing an option. What I try to do is basically something like this
One can see that the spinner "wraps" to have items and does not have a list, Would I could help a little?
You can use ExpandableListView .. check this tutorial http://www.androidhive.info/2013/07/android-expandable-list-view-tutorial/
You can easily create one on your own. Just create a Button and assign a Layout below. When the Button gets clicked set the View of you Layout to Visible and otherwise to Invisible. Additionaly you can set up and down arrows to the right of your Button.
final Button button = (Button) findViewById(R.id.button);
final LinearLayout linearLayout= (LinearLayout) findViewById(R.id.linearLayout);
linearLayout.setVisibility(View.GONE);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (linearLayout.getVisibility() == View.VISIBLE) {
linearLayout.setVisibility(View.GONE);
button.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.expand, 0);
} else {
linearLayout.setVisibility(View.VISIBLE);
button.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.collapse, 0);
}
}
});