It is possible using Dialog class but I do not want it that way. Instead I want it to be done by using PopupWindow class which gets popped up on startup and display some message on the popup. I am helpless, just can not getting this after spending many days behind it. Hope I get it here. Please and Thanks. Also look at below snippet if you didn't get what I want..
public class PopupActivity extends Activity implements OnClickListener {
LinearLayout ll = new LinearLayout(this);
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(ll);
}
protected void onStart() {
super.onStart();
final PopupWindow pw;
Button button = new Button(this);
button.setText("Hello");
pw = new PopupWindow(button, 245, 284, true);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
pw.dismiss();
}
});
pw.showAsDropDown(ll, 10, -50);
}
}
Above code gives me FORCE CLOSE :/ Help guys..
this is how you may show a popup window.
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:orientation="vertical"
android:id="#+id/layoutTemp">
</LinearLayout>
popup_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:padding="10dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:text="Test Pop-Up" />
</LinearLayout>
main.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
new Handler().postDelayed(new Runnable() {
public void run() {
showPopup();
}
}, 100);
}
public void showPopup(){
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
PopupWindow pw = new PopupWindow(inflater.inflate(R.layout.popup_layout, null, false), 100, 100, true);
pw.showAtLocation(findViewById(R.id.layoutTemp), Gravity.CENTER, 0, 0);
}
The idea is that your popup will be displayed once your activity is loaded, otherwise it will produce exception Unable to add window -- token null is not valid; is your activity running?. Unless you show popup on a button click, that is the reason I'm showing it after a delay of 100 milliseconds (which is almost unnoticeable).
Related
Am quite new to Android programming and hope someone can help me out in this:
1. I am coding from one of the demos here:
http://developer.android.com/training/animation/screen-slide.html
I have a main activity_screen_slide.xml file:
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
In another xml file, main.xml, I have a few buttons.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/Main"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<Button
android:id="#+id/buttonStart"
android:text="test"/>
</LinearLayout>
Within the main java activity file, the context is set as following:
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_screen_slide);
When I tried to set a listener for testButton, am unable to do so. This means that when the button is generated subsequently (through an inflator in another java file), there is no response when I click the button.
The java file to generate the inflator is simply:
ViewGroup rootView;
rootView = (ViewGroup) inflater.inflate(R.layout.main, container, false);
Thank you and appreciate your help
Cheers
D
I assume your button is defined in your xml layout activity_screen_slide.xml similar to this:
<Button
android:id="#+id/myButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
In your Activity you can add a ClickListener like this:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button myButton = (Button) findViewById(R.id.myButton);
myButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Log.i("", "I've been clicked");
}
});
}
Try this:
public class Settings extends Activity implements View.OnClickListener {
public void onCreate(Bundle savedInstanceState) {
//...ALL THE OTHER CODE..\\
Button button = (Button) findViewById(R.id.YOUR_BUTTON_ID);
button.setOnClickListener(this);
}
#Override
public void onClick(View view) {
switch (view.getId()){
case R.id.YOUR_BUTTON_ID: {
ALPHA.YourFunction(parameters);
}
}
}
}
I am using a XML-layout which I am prompting as the dialog box.
Designing of XML-layout is well formatted with enough required height and width..
But when I open it as the dialog box its width is getting disturbed so how to set height and width of dialog box through coding.
I even had referred this previous STACK OVERFLOW QUESTION
Here is the code:
// Layout Inflater Code..
editDialog = new Dialog(this);
layoutEdit = LayoutInflater.from(this).inflate(R.layout.createlayout, null);
//layoutEdit.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT));
editDialog.setContentView(layoutEdit);
// Called the Dialogbox to inflate
updateButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
editDialog.show();
}
});
// XML File Code:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/bd"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:freezesText="false"
android:text="Enter Name"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#color/whtie"
android:typeface="monospace" />
<EditText
android:id="#+id/txtname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName" >
</EditText>
</LinearLayout>
</ScrollView>
Try this...
1.Dialog snippet:
private void CustomDialog(String msg) {
final Dialog dialog = new Dialog(YourActivity.this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
LinearLayout.LayoutParams dialogParams = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT, 300);//set height(300) and width(match_parent) here, ie (width,height)
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View dislogView = inflater
.inflate(R.layout.my_custom_popup, null);
dialog.setContentView(dislogView, dialogParams);
TextView popupMsg = (TextView) dialog.findViewById(R.id.popupMsg);
Button popupOk = (Button) dialog.findViewById(R.id.popupOk);
popupMsg.setText(msg);
popupOk.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
2.Then call CustomDialog(Str) where you want to prompt in your activity.
CustomDialog("This is customized popup dialog!");
You better use an activity that looks like a dialog (I feel it will be better in your case). Here is an example code:
public class DialogActivity extends Activity {
/**
* Initialization of the Activity after it is first created. Must at least
* call {#link android.app.Activity#setContentView setContentView()} to
* describe what is to be displayed in the screen.
*/
#Override
protected void onCreate(Bundle savedInstanceState) {
// Be sure to call the super class.
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_LEFT_ICON);
// See assets/res/any/layout/dialog_activity.xml for this
// view layout definition, which is being set here as
// the content of our screen.
setContentView(R.layout.dialog_activity);
getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,
android.R.drawable.ic_dialog_alert);
}
}
This code is from api demos
View layout = inflater.inflate(R.layout.view, NULL);
layout.setMinimumWidth(200);
layout.setMinimumHeight(200);
dialog.setContentView(layout);
Try
dialog.getWindow().setLayout(height, width);
I am new to android and just trying to modify a basic example.
main.xml is like
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:weightSum="1">
<Button android:layout_width="228dp" android:layout_height="wrap_content" android:id="#+id/addButton" android:text="#string/addBtn"></Button>
</LinearLayout>
And want to add TextField on Click of the button. How to add Child to view?
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btn=(Button)findViewById(R.id.addButton);
btn.setOnClickListener(this);
}
#Override
public void onClick(View v) {
EditText editText = new EditText(v.getContext());
//Append the editText to View
}
How to append it to current view/layout?
Something like this would help you i think.
ParentView.post(new Runnable() {
public void run() {
ParentView.addView(newView,0);
LinearLayout.LayoutParams rlparams = (LinearLayout.LayoutParams)rldeal.getLayoutParams();
rlparams.width = LinearLayout.LayoutParams.WRAP_CONTENT;
rlparams.height = LinearLayout.LayoutParams.WRAP_CONTENT;
newView.setLayoutParams(rlparams);
}
});
Try to use include and merge:
http://mfarhan133.wordpress.com/2010/10/01/reusing-layout-include-merge-tag-for-androd/
I have a strange problem I don't understand...
I want to do a PopupWindow from an XML file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/popup"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#404040"
android:padding="15px">
<TextView android:id="#+id/popup_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="16dip"
android:gravity="center_horizontal" />
</LinearLayout>
and I just want to do a so simple thing: set the text in my TextView... Here is my code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//UI
ui = new RelativeLayout(this);
ui.setBackgroundColor(Color.LTGRAY);
setContentView(ui);
//PopUp
LayoutInflater inflater = (LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
popUp = new PopupWindow(this);
popUp.setContentView(inflater.inflate(R.layout.popup_piece, ui, false));
//Boutton
bouton = new Button(this);
bouton.setText("POWPEUP");
ui.addView(bouton);
bouton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
popUp.showAtLocation(ui, Gravity.CENTER, 0, 0);
popUp.update(0, 0, 350, 400);
titrePopUp = (TextView)findViewById(R.id.popup_title); // THIS RETURNS NULL
Log.d("TextView", ""+titrePopUp);
//titrePopUp.setText("blop", TextView.BufferType.NORMAL); SO THIS DONT WORK
}
});
}
Seriously, I don't understand why it returns a NULL value.. Can anyone help me, please?
You are searching for the TextView in your main layout, not in the PopupWindow. You need to do this instead:
titrePopUp = (TextView) popUp.getContentView().findViewById(R.id.popup_titre);
In layout id is spelled as popup_title, and in code it's spelled as popup_titre. Maybe, this is the problem.
I´m working with a lineal layout and I´m trying to change the text of a TextView but it doesn´t refresh. When I debug I´ve checked that the text have changed correctly.
Thanks
public class Position extends Activity {
Button botonempezar;
Button botonsalir;
TextView text;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.position);
botonsalir = (Button) findViewById(R.id.salir);
botonempezar = (Button) findViewById(R.id.Empezar);
text = (TextView) findViewById(R.id.Textoposicion);
botonsalir.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
onDestroy();
finish();
}
});
botonempezar.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
searchPosition();
}
});
}
private void searchPosition(){
boolean condition = true;
do{
determinatePosition();
}while(condition == true);
}
private void determinatePosition(){
....
this.text.setText("New text");
//this.text.invalidate();
this.text.postInvalidate();
Toast.makeText(getBaseContext(), "New text", Toast.LENGTH_SHORT);// this doesnt work neither.
....
}
Here I post the code of the xml file. Its really silly but it could be the problem:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_height="wrap_content"
android:id="#+id/Textoposicion"
android:text="Posición desconocida"
android:layout_width="fill_parent"
android:layout_marginTop="20dip"
android:inputType="text">
</TextView>
<Button android:layout_height="wrap_content"
android:id="#+id/Empezar" android:text="Empezar"
android:layout_width="fill_parent"
android:layout_marginTop="20dip">
</Button>
<Button
android:layout_height="wrap_content"
android:id="#+id/salir"
android:layout_marginTop="20dip"
android:text="Finalizar programa"
android:gravity="center" android:layout_width="fill_parent">
</Button>
</LinearLayout>
I have edited the post because I omitted part of the code to make it simpler but I think I may suppressed the problem too. It runs in a endless loop, could be this the mistake?
Try to call invalidate on the view.
http://developer.android.com/reference/android/view/View.html#invalidate()
this.text.invalidate();
This will cause a redraw.
Sorry, too quick, I saw that you already tried that.
Didn't that work? Why did you comment that away?
You forgot to call show() method on Toast :). Try this:
Toast.makeText(getBaseContext(), "New text", Toast.LENGTH_SHORT).show();
Try not using getBaseContext(). Use Position.this
Well now your infinite loop is caused by
private void searchPosition(){
boolean condition = true;
do{
determinatePosition();
}while(condition == true);
}
Try moving the toast into public void onClick(View v)
Also, show us your imports