I am trying to make a popup window in an activity. The popup window shows up when we click a button in the activity. The layout for popup window is to show a radio group containing 4 radio buttons, a button and a seek bar and has to return a value to the main activity based on the selected radio button when the button in the pop up window is pressed.
When i run the app and open the pop up window it is giving we this error:
"java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RadioGroup.setOnCheckedChangeListener(android.widget.RadioGroup$OnCheckedChangeListener)' on a null object reference "
The code for my main activity is:
public class CustomMenuActivity extends Activity
{
String ingredientName;
String ingredientQuantity;
private PopupWindow pw;
Button setQuantity;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_custom_menu);
setQuantity = (Button) findViewById(R.id.btnSetQty);
setQuantity.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v)
{
initiatePopupWindow();
}
});
}
private void initiatePopupWindow()
{
try {
//We need to get the instance of the LayoutInflater, use the context of this activity
LayoutInflater inflater = (LayoutInflater) CustomMenuActivity.this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
//Inflate the view from a predefined XML layout
View layout = inflater.inflate(R.layout.set_quantity_popup,
(ViewGroup) findViewById(R.id.popupElementid));
// create a 600px width and 570px height PopupWindow
pw = new PopupWindow(layout, 600, 570, true);
// display the popup in the center
pw.showAtLocation(layout, Gravity.CENTER, 0, 0);
RadioGroup radioGroup;
radioGroup = (RadioGroup) findViewById(R.id.radioGroupid);
final String[] tempQtyVar = new String[1];
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId){
case R.id.rbqty30id:
tempQtyVar[0] = "30";
break;
case R.id.rbqty60id:
tempQtyVar[0] = "60";
break;
case R.id.rbqty90id:
tempQtyVar[0] = "90";
break;
case R.id.rbqtycutomid:
tempQtyVar[0] = "120";
break;
}
}
});
Button setQtyBtn = (Button) layout.findViewById(R.id.buttonOkSetQtyid);
setQtyBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ingredientQuantity = tempQtyVar[0];
Toast.makeText(getApplicationContext(),ingredientQuantity,Toast.LENGTH_LONG).show();
pw.dismiss();
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
The layout.xml for my pop up window is:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:background="#fd050505"
android:padding="30dp"
android:id="#+id/popupElementid">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:id="#+id/relativeLayout">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SET QUANTITY"
android:textColor="#84e9e6"
android:textSize="20sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:textStyle="bold"
android:id="#+id/popupTitleid"/>
<LinearLayout
android:layout_width="600dp"
android:layout_height="wrap_content"
android:layout_below="#+id/popupTitleid"
android:orientation="horizontal"
android:background="#drawable/btn_rounded_boarder"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp">
<RadioGroup
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/radioGroupid"
android:layout_marginTop="20dp"
android:layout_marginBottom="20dp"
android:orientation="horizontal"
>
<RadioButton
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text=" 30ml "
android:textColor="#84e9e6"
android:id="#+id/rbqty30id"
android:checked="true" />
<RadioButton
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#84e9e6"
android:text=" 60ml "
android:id="#+id/rbqty60id" />
<RadioButton
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#84e9e6"
android:text=" 90ml "
android:id="#+id/rbqty90id" />
<RadioButton
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#84e9e6"
android:text=" Custom Value "
android:id="#+id/rbqtycutomid"
/>
</RadioGroup>
</LinearLayout>
<LinearLayout
android:layout_width="600dp"
android:layout_height="wrap_content"
android:layout_marginTop="50dp"
android:layout_centerHorizontal="true">
<SeekBar
android:id="#+id/customqtySBid"
android:layout_height="fill_parent"
android:layout_width="600dp"
android:textColor="#84e9e6"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
android:layout_marginTop="150dp"
android:paddingBottom="10dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layout_centerHorizontal="true">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/buttonOkSetQtyid"
android:textColor="#84e9e6"
android:text="OK"
android:background="#drawable/btn_rounded_boarder"
android:layout_marginTop="275dp"/>
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
I tried looking for answer online but didn't really find solution specific to my problem. Please suggest any solutions.
Thanks in advance.
You seem to be inflating the wrong layout. Change the correct layout.xml in
setContentView(R.layout.activity_custom_menu);
Related
if (type=="dialer") {
String timestamp = list.get(position).get(Constants.DATE);
holder.txtTimestamp.setVisibility(View.VISIBLE);
holder.imgDelete.setVisibility(View.GONE);
holder.txtTimestamp.setText(getDate(Long.parseLong(timestamp),"dd/MM/yyyy hh:mm:ss"));
if (Integer.parseInt(callType) == CallLog.Calls.BLOCKED_TYPE)
holder.imgCallType.setImageDrawable(context.getResources().getDrawable(R.drawable.block));
if (Integer.parseInt(callType) == CallLog.Calls.BLOCKED_TYPE)
holder.imgCallType.setImageDrawable(context.getResources().getDrawable(R.drawable.rejected));
if (Integer.parseInt(callType) == CallLog.Calls.OUTGOING_TYPE)
holder.imgCallType.setImageDrawable(context.getResources().getDrawable(R.drawable.outgoing_call));
if (Integer.parseInt(callType) == CallLog.Calls.INCOMING_TYPE)
holder.imgCallType.setImageDrawable(context.getResources().getDrawable(R.drawable.incoming_call));
if (Integer.parseInt(callType) == CallLog.Calls.MISSED_TYPE)
holder.imgCallType.setImageDrawable(context.getResources().getDrawable(R.drawable.missed_call));
if (Integer.parseInt(callType) == CallLog.Calls.ANSWERED_EXTERNALLY_TYPE)
holder.imgCallType.setImageDrawable(context.getResources().getDrawable(R.drawable.call_received));
}else if (type=="contact") {
holder.txtTimestamp.setVisibility(View.GONE);
holder.imgCallType.setVisibility(View.GONE);
holder.imgDelete.setVisibility(View.GONE);
}else if (type=="favourite"){
holder.txtTimestamp.setVisibility(View.GONE);
holder.imgCallType.setVisibility(View.GONE);
}
// listener
Bitmap finalBitmap = imgBitmap;
holder.imgPic.setOnLongClickListener(view -> {
CustomDialog imageDialog = new CustomDialog(activity,R.layout.image_dialog,"","","", finalBitmap);
imageDialog.setCancelable(true);
imageDialog.show();
return false;
});
holder.itemView.setOnLongClickListener(view->{
if (type=="dialer"){
}else if (type=="contact"){
Intent intent = new Intent(context, ContactDetailsActivity.class);
intent.putExtra("id",list.get(position).get(Constants.ID));
context.startActivity(intent);
}else if (type=="favourite"){
Intent intent = new Intent(context, FavouriteContactDetailsActivity.class);
intent.putExtra(Constants.FAVOURITE_ID,list.get(position).get(Constants.FAVOURITE_ID));
intent.putExtra(Constants.ID,list.get(position).get(Constants.ID));
ActivityOptions anim = ActivityOptions.makeSceneTransitionAnimation(activity);
context.startActivity(intent, anim.toBundle());
}
return false;
});
holder.imgDelete.setOnClickListener(v->{
SqliteFavourite sqliteFavourite = new SqliteFavourite(context.getApplicationContext());
boolean check = sqliteFavourite.deleteData("",list.get(position).get(Constants.ID));
if (check)
Snackbar.make(v,"Successfully deleted",Snackbar.LENGTH_SHORT).show();
else Snackbar.make(v,"Error occurred when deleting",Snackbar.LENGTH_SHORT).show();
});
holder.itemView.setOnClickListener(view->{
call(activity,phoneNumber);
});
I was using these code in an adapter.
#Override
public int getItemCount() {
return list.size();
}
#Override
public int getItemViewType(int position) {
return position;
}
public class MyViewHolder extends RecyclerView.ViewHolder {
TextView txtContactName,txtContactNumber,txtTimestamp;
ImageView imgPic,imgCallType,imgDelete;
ConstraintLayout contactItem;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
txtContactName = itemView.findViewById(R.id.txtName);
txtContactNumber = itemView.findViewById(R.id.txtContactNumber);
txtTimestamp = itemView.findViewById(R.id.txtTimestamp);
imgPic = itemView.findViewById(R.id.imgContact);
imgCallType = itemView.findViewById(R.id.imgCallType);
contactItem = itemView.findViewById(R.id.contactItem);
imgDelete = itemView.findViewById(R.id.imgDeleteContact);
}
}
Whenever I am clicking on first or second item then I can hear the clickListener. But when I click on 3rd 4th or higher item then I can't hear the clickListener. Even I had set a selector there but the selector is only working for 1st and 2nd
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/contactItem"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/selector"
android:clickable="true">
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/imgContact"
android:layout_width="50dp"
android:layout_height="0dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="#drawable/user_profile"
app:civ_border_color="#FF000000"
app:civ_border_width="2dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="SpeakableTextPresentCheck" />
<TextView
android:id="#+id/txtName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:text="Name"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="#+id/txtContactNumber"
app:layout_constraintEnd_toStartOf="#+id/imgCallType"
app:layout_constraintStart_toEndOf="#+id/imgContact"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/txtContactNumber"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:text="Contact Number"
app:layout_constraintBottom_toTopOf="#id/txtTimestamp"
app:layout_constraintEnd_toStartOf="#+id/imgCallType"
app:layout_constraintStart_toEndOf="#+id/imgContact"
app:layout_constraintTop_toBottomOf="#+id/txtName" />
<TextView
android:id="#+id/txtTimestamp"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:text="TextView"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#+id/txtContactNumber"
app:layout_constraintStart_toEndOf="#+id/imgContact"
app:layout_constraintTop_toBottomOf="#id/txtContactNumber" />
<ImageView
android:id="#+id/imgCallType"
android:layout_width="30dp"
android:layout_height="30dp"
android:src="#drawable/call_received"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/imgDeleteContact"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/selector"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#android:drawable/ic_menu_delete" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
When I scroll down then I can hear the listener but whenever I am on top at that layout then I can't access the listener in 3rd or more. Why it's happening? I am not getting any error in logcat. Although I can't click on some items why? I had tried to use holder.contactItem.setOn.... but it wasn't working also.
When I scroll down I can listen the click. But whenever I am at top I can't listen. But I wonder I can click on Image. I meant holder.imgPic.setOnLongClickListener......
I have set onTouchListener to itemView but it's working. It's only not working for onCLickListener and onLongClickListener (As I said earlier it's working when I scroll down).
I have tried
android:focusable="false"
android:clickable="false"
android:longClickable="false"
although I was facing the same issue. I had used them in Constraint Layout which I declared as contactItem. Then I had tried holder.contactItem instead of holder.itemView
I created a custom dialog fragment to be used as a YesNo Dialog Box for my project as shown below
I want to use it dynamically in where I can use it not only for one xml file.
Does anybody know how can I set the button click listener in the appcompact class from the dialogfragment on call?
I just want to set the buttonclick event of the dialogfragment in another xml file.
I tried using interface but it gives me a null pointer exception so I tried the code below.
the YesNoDialogFragment Class
public class DialogYesNo extends DialogFragment {
LayoutInflater inflater;
View v;
#NonNull
#Override
public Dialog onCreateDialog(#Nullable Bundle savedInstanceState) {
inflater = getActivity().getLayoutInflater();
v = inflater.inflate(R.layout.dialog_yesno,null);
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setView(v);
return builder.create();
}
}
the XML file of the DialogFragment
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:background="#drawable/dialog_background"
android:layout_gravity="center">
<TextView
android:id="#+id/yesno_title"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="TITLE"
android:textAlignment="center"
android:textAllCaps="true"
android:textSize="10pt"
android:background="#1b1b01"
android:textColor="#fff"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="7dp"
android:paddingLeft="10dp"
android:textStyle="bold"/>
<View
android:id="#+id/divider"
android:layout_width="match_parent"
android:layout_height="5dp"
android:background="?android:attr/listDivider" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#520456">
<TextView
android:id="#+id/yesno_message"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="Message"
android:textAllCaps="true"
android:textSize="12dp"
android:textColor="#fff"
android:paddingLeft="10dp"
android:textStyle="bold"/>
</ScrollView>
<View
android:id="#+id/divider1"
android:layout_width="match_parent"
android:layout_height="10dp"
android:background="?android:attr/listDivider" />
<LinearLayout
android:orientation="horizontal"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:gravity="center">
<Button
android:id="#+id/dialog_No"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="NO"
android:background="#drawable/dialog_background"
android:textColor="#000"
android:textStyle="bold"
android:textSize="10pt"/>
<Button
android:id="#+id/dialog_Yes"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="YES"
android:layout_marginLeft="8dp"
android:background="#drawable/dialog_background"
android:textColor="#000"
android:textStyle="bold"
android:textSize="10pt"/>
</LinearLayout>
this is the code in the MainActivity
btnYes = dialogYesNo.getActivity().findViewById(R.id.dialog_Yes);
btnNo = dialogYesNo.getActivity().findViewById(R.id.dialog_No);
btnYes.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,TutwithNavigation.class);
startActivity(intent);
}
});
btnNo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// code here
}
});
try findViewById in your DialogYesNo, and add setListener for it
like this:
private OnClickListener onYesClick;
private OnClickListener onNoClick;
public Dialog onCreateDialog(#Nullable Bundle savedInstanceState) {
inflater = getActivity().getLayoutInflater();
v = inflater.inflate(R.layout.dialog_yesno,null);
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setView(v);
View btnYes = v.findViewById(R.id.dialog_Yes);
View btnNo = v.findViewById(R.id.dialog_No);
btnYes.setOnClickListener(onYesClick);
btnNo.setOnClickListener(onNoClick);
return builder.create();
}
}
public void setOnYesClick(OnClickListener listener){
onYesClick = listener
}
public void setOnNoClick(OnClickListener listener){
onNoClick = listener
}
use setOnYesClick and setOnNoClick instead
I try set my popup menu in way to fill hole item on grid. Currently it look like on attached first picture and the next one is effect which I would like to have.
My code:
private void showPopupMenu(View view) {
// inflate menu
ContextThemeWrapper ctw = new ContextThemeWrapper(context, R.style.PopupMenu);
PopupMenu popup = new PopupMenu(ctw, view);
Menu menu = popup.getMenu();
menu.add(Menu.NONE, 1, Menu.NONE, "Remove");
menu.add(Menu.NONE, 2, Menu.NONE, "Block");
popup.setOnMenuItemClickListener(new MyMenuItemClickListener());
popup.show();
}
Could you please point me to right direction to achieve effect from project?
Demo App for your requirment by using PopupWindow. Preview
You can add list in it or customize it according to your needs.
MainActivity
public class MainActivity extends Activity {
boolean isClicked = true;
PopupWindow popUpWindow;
RelativeLayout relative;
ImageView btnClickHere;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
relative = (RelativeLayout) findViewById(R.id.relative);
popUpWindow = new PopupWindow(this);
popUpWindow.setContentView(getLayoutInflater().inflate(R.layout.popup_design, null));
popUpWindow.getContentView().findViewById(R.id.textViewa).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "PopItemClicked", Toast.LENGTH_LONG).show();
}
});
btnClickHere = (ImageView) findViewById(R.id.imageView);
btnClickHere.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (isClicked) {
isClicked = false;
popUpWindow.setHeight(relative.getHeight());
popUpWindow.setWidth(relative.getWidth());
popUpWindow.showAsDropDown(relative, 0, -relative.getHeight());
} else {
isClicked = true;
popUpWindow.dismiss();
}
}
});
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.sohailzahid.testapp.MainActivity">
<RelativeLayout
android:id="#+id/relative"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="#color/colorAccent"
tools:layout_editor_absoluteX="150dp"
tools:layout_editor_absoluteY="150dp">
<ImageView
android:id="#+id/imageView"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:src="#android:drawable/arrow_down_float" />
</RelativeLayout>
</RelativeLayout>
popup_design.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#F93567">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/textViewa"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="Block"
android:textColor="#ffffff"
android:textSize="20dp" />
<TextView
android:id="#+id/textVsiewa"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="Add to friends"
android:textColor="#ffffff"
android:textSize="20dp" />
<TextView
android:id="#+id/textViesw"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="Remove"
android:textColor="#ffffff"
android:textSize="20dp" />
</LinearLayout>
<ImageView
android:id="#+id/imageView"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_margin="10dp"
android:src="#android:drawable/arrow_down_float" />
</RelativeLayout>
Try this
popup.getWindow().getAttributes().height = ViewGroup.LayoutParams.MATCH_PARENT;
popup.getWindow().getAttributes().width = ViewGroup.LayoutParams.MATCH_PARENT;
public class AddActivity extends Activity implements OnClickListener{
String[] info = new String[11];
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_layout);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
TextView keyString = (TextView)findViewById(R.id.keyString);
TextView site1 = (TextView)findViewById(R.id.site1);
TextView site2 = (TextView)findViewById(R.id.site2);
TextView site3 = (TextView)findViewById(R.id.site3);
ImageButton submit = (ImageButton)findViewById(R.id.submit);
ImageButton add1 = (ImageButton)findViewById(R.id.add1);
ImageButton add2 = (ImageButton)findViewById(R.id.add2);
ImageButton add3 = (ImageButton)findViewById(R.id.add3);
submit.setOnClickListener((OnClickListener) this);
add1.setOnClickListener((OnClickListener) this);
add2.setOnClickListener((OnClickListener) this);
add3.setOnClickListener((OnClickListener) this);
int id = v.getId();
switch(id){
case R.id.submit:{
submitEntry(info);
break;
}
case R.id.add1:{
add2.setVisibility(View.VISIBLE);
site2.setVisibility(View.VISIBLE);
break;
}
}
}
}
This is the code.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/key_string"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:visibility="invisible" />
<EditText
android:id="#+id/keyString"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:visibility="invisible" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/site_string"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:visibility="invisible" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageButton
android:id="#+id/add1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_action_new" />
<EditText
android:id="#+id/site1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/url_hint"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:visibility="invisible" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageButton
android:id="#+id/add2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_action_new"
android:visibility="invisible" />
<EditText
android:id="#+id/site2"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:text="#string/url_hint"
android:textAppearance="?android:attr/textAppearanceLarge"
android:visibility="invisible" />
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:visibility="invisible" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageButton
android:id="#+id/add3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_action_new"
android:visibility="invisible" />
<EditText
android:id="#+id/site3"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:text="#string/url_hint"
android:visibility="invisible"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:visibility="invisible" />
<Button
android:id="#+id/submit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/submit_buttom" />
</LinearLayout>
</ScrollView>
</LinearLayout>
And this is the XML. The add1, add2, add3 and submit ImageButtons are all in a ScrollView.
When I press the add1 ImageButton, I want the add2 and site2 ImageButtons to become visible but instead, it throws the following error.
Motion event has invalid pointer count 0; value must be between 1 and 16.
What am I doing wrong?
PS: All the findViewById() calls are in the onClick() method because a NullPointerExeption is thrown if I call them in the onCreate().
Those findViewByIdcalls in onClickdon't make sense. Not sure why you are getting a null pointer exception calling them in onCreate.onClick is never called in this instance because nothing in the creation of the Activity is assigning the buttons to look at your onClick method; the buttons will default to having no listener assigned. It also doesn't look like a good idea to use the Activity as the onClickListener as well.
Your code should look something like this:
public class AddActivity extends Activity {
// https://source.android.com/source/code-style.html
// info -> mInfo; non-public, non-static field!
String[] mInfo = new String[11];
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_layout);
TextView keyString = (TextView)findViewById(R.id.keyString);
TextView site1 = (TextView)findViewById(R.id.site1);
TextView site2 = (TextView)findViewById(R.id.site2);
TextView site3 = (TextView)findViewById(R.id.site3);
Button submit = (Button)findViewById(R.id.submit);
ImageButton add1 = (ImageButton)findViewById(R.id.add1);
ImageButton add2 = (ImageButton)findViewById(R.id.add2);
ImageButton add3 = (ImageButton)findViewById(R.id.add3);
add1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
add2.setVisibility(View.VISIBLE);
site2.setVisibility(View.VISIBLE);
}
});
submit.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
submitEntry(mInfo);
}
});
}
The findViewById() calls and especially the setOnClickListener() calls should have been inside the onCreate(). With setOnClickListener() inside the onClick() i doubt the onClick was ever called.
We would need more logs to find the exact issue.
I have a following layout in main_view.xml which contains a ImageButton in it, button when i click/touch the button the ButtonListener function never gets called.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relativeLayoutFragment"
android:layout_width="match_parent"
android:layout_height="fill_parent" >
<fragment
android:id="#+id/mapArea"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</fragment>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<TextView
android:id="#+id/locate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_gravity="center_horizontal"
android:layout_marginTop="10dp"
android:background="#80000000"
android:gravity="center"
android:padding="10dp"
android:text="#string/findingLocation"
android:textColor="#FFFFFF"
android:textSize="12sp" />
<ImageButton
android:id="#+id/Button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginBottom="#dimen/rightLeftMargin"
android:layout_marginLeft="#dimen/rightLeftMargin"
android:background="#null"
android:clickable="true"
android:contentDescription="#string/button1text"
android:src="#drawable/ic_feed_active" />
<ImageButton
android:id="#+id/Button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="#dimen/rightLeftMargin"
android:background="#null"
android:contentDescription="#string/button2"
android:src="#drawable/ic_button2" />
<ImageButton
android:id="#+id/Button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="#dimen/rightLeftMargin"
android:layout_marginRight="#dimen/rightLeftMargin"
android:background="#null"
android:contentDescription="#string/button3View"
android:src="#drawable/ic_settings_active" />
</RelativeLayout>
And following code in MainActivity.Java
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
User usrObj = new User();
if (usrObj.authenticateUser())
setContentView(R.layout.main_view);
else
setContentView(R.layout.login);
}
public void ButtonListener() {
ImageButton oggleButton = (ImageButton) findViewById(R.id.Button1);
ToggleButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Toast.makeText(MainActivity.this, "ImageButton is clicked!",
Toast.LENGTH_SHORT).show();
}
});
}
}
please help.
you forget to call ButtonListener method when usrObj.authenticateUser() is true. do it as:
if (usrObj.authenticateUser())
{
setContentView(R.layout.main_view);
ButtonListener (); << call here
}
else
setContentView(R.layout.login);
and also attach setOnClickListener to oggleButton instead of ToggleButton
apart from above suggestions from ρяσѕρєя K, here is one more thing you have to take care is.
instead of this below code.
oggleButton.setOnClickListener(new OnClickListener() {
use this one
oggleButton.setOnClickListener(new View.OnClickListener() { // use View.oncli......