I have a dynamic Android form with dynamic fields behaviour.
Example: If user fills field A, show field B and hides field C.
I'm using methods view.setVisibility(View.VISIBLE) and view.setEnabled(boolean) for this purpose. This approach works for RadioGroup and EditText, but don't work for Spinner component.
The spinner is set to visible, but is always disabled. The method .setEnable(true) don't cause any effect.
I need to show the spinner enabled.
If the spinner was visible, the setEnabled() works. But if the spinner was invisible, this 2 commands together don't work.
spinner.setVisibility(View.VISIBLE)
spinner.setEnabled(Boolean.TRUE)
[]'s
Please provide more details. The following code shows you how you can show/hide or enable/disable the spinner.
boolean visibility = true;
boolean enabled = true;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayout linearLayout = new LinearLayout(this);
final Spinner spinner = new Spinner(this);
String[] animals = {"cats","dogs","lines","rats"};
spinner.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,animals));
linearLayout.addView(spinner);
Button visiblity = new Button(this);
visiblity.setText("VisibilityButton");
linearLayout.addView(visiblity);
setContentView(linearLayout);
visiblity.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(visibility){
spinner.setVisibility(View.INVISIBLE);
visibility = false;
}
else{
spinner.setVisibility(View.VISIBLE);
visibility = true;
}
}
});
Button enabledButton = new Button(this);
enabledButton.setText("EnabledButton");
linearLayout.addView(enabledButton);
enabledButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(enabled){
spinner.setEnabled(false);
enabled = false;
}
else{
spinner.setEnabled(true);
enabled = true;
}
}
});
}
Related
I am working with android LinearLayout and i am adding a TextView programmicataly and then on TextView click add an EditText in View. Now I want to get data at then end on button click from all added EditTexts in layout. here is my coding through which i am working.
TextView addMoreText = new TextView(this);
addMoreText.setText("Add More Ingredients");
addMoreText.setGravity(Gravity.CENTER);
addMoreText.setPadding(20, 20, 20, 20);
addMoreText.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.add, 0);
addMoreText.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final EditText editTextItem = new EditText(SearchRecipe.this);
editTextItem.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.cross, 0);
editTextItem.setPadding(20, 20, 20, 20);
editTextItem.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
parentLayout.removeView(editTextItem);
return true;
}
});
parentLayout.addView(editTextItem, 0);
}
});
parentLayout.addView(addMoreText);
searchRecipe.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
i want to get all the data from EditText on searchRecipe click
Assign the id to the EditText:
editTextItem .setId({yourId});
Then inside searchRecipe onClick method, invoke:
EditText editTextItem = (EditText) parentLayout.findViewById({yourId});
And then use it as you want.
Add an arraylist and put the edittexts in it to keep track of them.
ArrayList<EditText> etList = new ArrayList();
In onClick of textview just add to it at the end.
etList.add(editTextItem);
In searchReciepe go through your list.
for(Edittext et : etList){
et.getText();
[...]
}
Edit: Obviously remember to remove it from the List on remove.
private int EDITTEXT_ID = 1;
private List<EditText> editTextList = new ArrayList<EditText>();
// Add Edittext programmatically in your view
private void addView() {
EditText editText = new EditText(this);
editText.setId(EDITTEXT_ID);
EDITTEXT_ID++;
editText.setText("Hello there " + EDITTEXT_ID);
editTextList.add(editText);
lnvEditText.addView(editText); // lnvEdittext is my LinearLayout which is added in XML file
}
// Get values of every Edittext on click of button
for(int i=0; i<editTextList.size(); i++) {
Log.e("All Values=", editTextList.get(i).getText().toString());
}
This is the first time I'm ever dabbling in Android development so please bear with me.
My requirement is this:
I have two buttons on screen, A and B. If the user presses both buttons (order doesn't matter), I need another page to be displayed. Pressing either A or B should do nothing.
Is this possible? If so, how would I achieve this?
Thank you.
This is possible if you take a flag. (boolean)
You should set a flag in your button listeners.
public class Mtest extends Activity {
Button b1;
Button b2;
boolean flag_1 = false;
boolean flag_2 = false;
public void onCreate(Bundle savedInstanceState) {
...
b1 = (Button) findViewById(R.id.b1);
b2 = (Button) findViewById(R.id.b2);
b1.setOnClickListener(myhandler1);
b2.setOnClickListener(myhandler2);
}
View.OnClickListener myhandler1 = new View.OnClickListener() {
public void onClick(View v) {
// it was the 1st button
flag_1 = true;
doSomething();
}
};
View.OnClickListener myhandler2 = new View.OnClickListener() {
public void onClick(View v) {
// it was the 2nd button
flag_2 = true;
doSomething();
}
};
}
public void doSomething(){
if(flag_1 && flag_2)
{
//DO SOMETHING
}
}
}
Create two boolean's like button1isClickedand button2isClicked,then set an onClickListener for each Button. When the the Button is clicked set the value of these two boolean's to true, then simply create an if() statement that will chekc to see if both buttons have been clicked, like this:
if(button1isClicked == true && button2isClicked == true){
//display your new page
}
I'm trying to create an activity entirely by java code. The goal here is to create an Activity that fills up itself by previous activity. It's a shop list activity.
The user add itens in the previous activity and when he ask to show the complete list the activity above will be generated.
The problem here is, I want to set red as the initial color of the textviews with the itens names, and when the user clicks on then, they change their color to green.
But when I click it the aplication force close with the message indexoutofbounds exception.
Could someone helps me?
public class Listdinamiccor extends Activity {
Bundle recebendoparametros;
int i = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_listdinamiccor);
Intent parametro = getIntent();
recebendoparametros = parametro.getExtras();
int j = recebendoparametros.getInt("i");
ScrollView sv = new ScrollView(this);
LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
sv.addView(ll);
final TextView[] tvarray = new TextView[j];
for (i = 0; i < tvarray.length; i++) {
String chave = "chave"+i;
final TextView tv = new TextView(this);
tvarray[i] = new TextView(this);
tvarray[i].setText(""+recebendoparametros.getString(chave));
tvarray[i].setTextColor(Color.RED);
tvarray[i].setOnClickListener(new View.OnClickListener() {
int click = 0;
#Override
public void onClick(View v) {
/*if (click == 0) {
tvarray[i].setTextColor(Color.GREEN);
}
else {
tvarray[i].setTextColor(Color.RED);
}*/
AlertDialog.Builder alert = new AlertDialog.Builder(Listdinamiccor.this);
alert.setTitle("dinamico");
alert.setMessage("eu sou muito dinamico");
}
});
ll.addView(tvarray[i]);
}
this.setContentView(sv);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.listdinamiccor, menu);
return true;
}
}
When your loop has completed executing, i is now set to tvarray.length -- your onClick handler doesn't "remember" the value of i, it simply does what you tell it to, which is to setTextColor on tvarray[i], and i is now out of bounds.
One way to solve it is to do this above your setOnClickListener line:
final TextView me = tvarray[i];
And then change your onClick method to call me.setTextColor instead of tvarray[i].setTextColor.
Also, I wouldn't recommend hanging onto the int i outside of your loop - I'm assuming you moved the member to the parent class so that your current code compiled, but in general you don't want to use for loop indexes outside of the for loop (this exception is one such reason).
Try casting your View v to a TextView inside your onclick listener instead of using the instance your creating in your array like this:
tvarray[i].setOnClickListener(new View.OnClickListener() {
int click = 0;
#Override
public void onClick(View v) {
if (click == 0) {
((TextView)v).setTextColor(Color.GREEN);
}
else {
((TextView)v).setTextColor(Color.RED);
}
AlertDialog.Builder alert = new AlertDialog.Builder(Listdinamiccor.this);
alert.setTitle("dinamico");
alert.setMessage("eu sou muito dinamico");
}
});
Currently I am displaying two texts in the activity.
e.g.: "Group 1" and "Group 2".
I let user select the text (just like a button).
I need to find out whether the above displayed text is selected or not and then change the background color.
Here is the code I use for that. tv.isSelected() always evaluates to 'false'. Can any body tell me what I am doing wrong.
Is the "isSelected()" method used for a different purpose than how I use it?
TextView textView = new TextView(this);
textView.setText("Group 1");
textView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
TextView tv = (TextView) view;
if (tv.isSelected()) {
tv.setBackgroundColor(Color.BLUE);
} else {
tv.setBackgroundColor(Color.WHITE);
}
}
});
linearLayout.addView(textView);
Try to do the following:
if (tv.getId() == textBox1Id) {
firstSelected = true;
} else { firstSelected = false; }
Try this
OnCreate()
{
TextView textView = new TextView(this);
textView.setText("Group 1");
textView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
textView.setSelected(true);
}
});
if (textView.isSelected()) {
textView.setBackgroundColor(Color.BLUE);
} else {
textView.setBackgroundColor(Color.WHITE);
}
linearLayout.addView(textView);
}
You could use a boolean variable to handle this:
private boolean tvSelected = false;
Your onClick method would change:
TextView textView = new TextView(this);
textView.setText("Group 1");
textView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (tvSelected) {
textView.setBackgroundColor(Color.WHITE);
tvSelected = false;
else {
tv.setBackgroundColor(Color.BLUE);
tvSelected = true;
}
});
linearLayout.addView(textView);
In terms of isSelected() usage, according to the API documentation:
A view can be selected or not. Note that selection is not the same as
focus. Views are typically selected in the context of an AdapterView
like ListView or GridView; the selected view is the view that is
highlighted.
I'm new to android development..
I have this code in my main class:
Button prevBtn, pauseBtn, nextBtn;
EditText counterTxt;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_affirmations);
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
prevBtn = (Button)findViewById(R.id.prevBtn);
pauseBtn = (Button)findViewById(R.id.pauseBtn);
nextBtn = (Button)findViewById(R.id.nextBtn);
counterTxt = (EditText)findViewById(R.id.counterTxt);
prevBtn.setOnClickListener(new View.OnClickListener() {
int t = Integer.parseInt(counterTxt.getText().toString());
public void onClick(View v) {
counterTxt.setText(String.valueOf(t-1));
}
});
nextBtn.setOnClickListener(new View.OnClickListener() {
int t = Integer.parseInt(counterTxt.getText().toString());
public void onClick(View v) {
counterTxt.setText(String.valueOf(t+1));
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_affirmations, menu);
return true;
}
When I click "Previous", the text field value becomes 19.
When I click "Next", the text field value becomes 21.
But it only displays these two values, nothing else, no matter if i click again. I want to subtract or add 1 whenever i click the appropriate buttons.
I think this happens because the event Listeners are inside onCreate() method? Any idea on how to make it update each time I click?
You need to move your parseInt inside your onClick:
nextBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
int t = Integer.parseInt(counterTxt.getText().toString());
counterTxt.setText(String.valueOf(t+1));
}
});
In both cases, t is defined as a member variable of the listener, and never changed. move it inside the onClick method instead, like this (in both cases):
public void onClick(View v) {
int t = Integer.parseInt(counterTxt.getText().toString());
counterTxt.setText(String.valueOf(t-1));
}