I'm having a problem with my android program.
I have about every thing working what i want, but now im trying to add a password dialog.
I want to show a Dialog with a EditText(enter password) and two buttons (ok, cancel).
(working fine till so far)
When clicking on the OK button the password should be saved in mij SendData Class.
But every time I try to get the content of the EditText it gives a Java.lang NullPointerException.
Can some one help me please?
(I don't have a stack trace as i don't know where to find it :( because i'm testing on android emulator.)
If there any thing else you need, please feel free to ask.
Here is the XML-FILE
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<requestFocus />
<EditText
android:id="#+id/txt_wachtwoord"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:inputType="textPassword" >
<requestFocus />
</EditText>
<Button
android:id="#+id/DialogOK"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/txt_wachtwoord"
android:layout_below="#+id/txt_wachtwoord"
android:layout_marginTop="22dp"
android:text="OK" />
<Button
android:id="#+id/Cancel"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/DialogOK"
android:layout_alignBottom="#+id/DialogOK"
android:layout_toRightOf="#+id/DialogOK"
android:text="Cancel" />
</RelativeLayout>
Here is the code:
package SebApp.Phone.Remote;
import java.net.DatagramSocket;
import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.EditText;
import android.widget.Toast;
import android.os.Vibrator;
import android.app.AlertDialog;
import android.content.DialogInterface;
public class PhoneRemote extends Activity {
private static final int VIBRATE_TIME = 100;
/** Called when the activity is first created. */
public Vibrator vibrator = null;
public sendData sd = new sendData();
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
vibrator = (Vibrator)getSystemService(VIBRATOR_SERVICE);
//button to call the Dialog
Button ww = (Button) findViewById(R.id.ww);
//listener password button
ww.setOnClickListener(wwOnClickListener);
}
Button.OnClickListener wwOnClickListener = new Button.OnClickListener() {
public void onClick(View v) {
try{
final EditText ww = (EditText) findViewById(R.id.txt_wachtwoord);
//set up dialog
Dialog dialog = new Dialog(PhoneRemote.this);
dialog.setContentView(R.layout.wachtwoord);
dialog.setTitle("This is my custom dialog box");
dialog.setCancelable(true);
//there are a lot of settings, for dialog, cheout!
//set up button
Button button = (Button) dialog.findViewById(R.id.DialogOK);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try{
Toast.makeText(v.getContext(),"PWfield contains: " + ww.getText().toString(), Toast.LENGTH_SHORT).show();
//finish();
}catch(Exception e)
{
Toast.makeText(v.getContext(),e.toString(), Toast.LENGTH_SHORT).show();
}
}
});
dialog.show();
}catch(Exception E){
Toast.makeText(v.getContext(),E.toString(), Toast.LENGTH_SHORT).show();
}
}
};
}
Button.OnClickListener wwOnClickListener = new Button.OnClickListener() {
public void onClick(View v) {
try{
final EditText ww = (EditText) findViewById(R.id.txt_wachtwoord);
//set up dialog
Dialog dialog = new Dialog(PhoneRemote.this);
dialog.setContentView(R.layout.wachtwoord);
dialog.setTitle("This is my custom dialog box");
dialog.setCancelable(true);
....
instead use
Button.OnClickListener wwOnClickListener = new Button.OnClickListener() {
public void onClick(View v) {
try{
Dialog dialog = new Dialog(PhoneRemote.this);
dialog.setContentView(R.layout.wachtwoord);
final EditText ww = (EditText) dialog.findViewById(R.id.txt_wachtwoord);
//set up dialog
dialog.setTitle("This is my custom dialog box");
dialog.setCancelable(true);
....
you had declared EditText before setting the dialog view
I have yet to run your code. However, I would say the variable wwOnClickListener is being initialized before the onCreate method.
Therefore the layout is not set, as the layout is set within the onCreate method. To fix this I would pull out the following
final EditText ww = (EditText) findViewById(R.id.txt_wachtwoord);
From the buttonlistener and make ww a global variable which is initialized in the onCreate method.
I would expect that will resolve the issue.
Related
What I'm facing is that whenever I press the button to save data to check if the fields is filled up and if it is then it will pass data to back4app but nothing happens even. The Android monitor/Run doesnt even show that the button is being pressed nor the Logcat.
I have a log in activity, register activity, and the main activity. After Logging in it will take you to the main activity which is empty for now but you need to use the navigation bar to take you to this activity and even the fields are filled or not the button does not respond at all. I put a toast to make sure that the button works but the toast doesnt show.
The code below I just copied in the registration form which is the same concept, fill the form test if theres something in there, if not then message will appear then it will send data to back4app. But the button in this problem doesnt work.
This is the button command
package com.example.back4app.userregistrationexample.Classes;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.view.View.OnClickListener;
import com.example.back4app.userregistrationexample.R;
import com.parse.Parse;
import com.parse.ParseObject;
import com.parse.ParseUser;
public class Purchases extends AppCompatActivity {
private EditText establishmentView;
private EditText particularsView;
private EditText amountView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.app_bar_purchases);
establishmentView = (EditText) findViewById(R.id.Edt_Establishment);
particularsView = (EditText) findViewById(R.id.Edt_Particular);
amountView = (EditText) findViewById(R.id.Edt_purchasesnumber);
final Button save = (Button) findViewById(R.id.btn_purchasessave);
save.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
boolean validationError = false;
StringBuilder validationErrorMessage = new StringBuilder("Please, insert ");
if (isEmpty(establishmentView)) {
validationError = true;
validationErrorMessage.append("an Establisment");
}
if (isEmpty(particularsView)) {
if (validationError) {
validationErrorMessage.append(" and ");
}
validationError = true;
validationErrorMessage.append("a Particular");
}
if (isEmpty(amountView)) {
if (validationError) {
validationErrorMessage.append(" and ");
}
validationError = true;
validationErrorMessage.append("a Amount");
}
validationErrorMessage.append(".");
if (validationError) {
Toast.makeText(Purchases.this, validationErrorMessage.toString(), Toast.LENGTH_LONG).show();
return;
}
final ProgressDialog dlg = new ProgressDialog(Purchases.this);
dlg.setTitle("Please, wait a moment.");
dlg.setMessage("Signing up...");
dlg.show();
Toast.makeText(getApplicationContext(),"Data Saved",Toast.LENGTH_SHORT).show();
}
});
}
private boolean isEmpty(EditText text) {
if (text.getText().toString().trim().length() > 0) {
return false;
} else {
return true;
}
}
private boolean isMatching(EditText text1, EditText text2){
if(text1.getText().toString().equals(text2.getText().toString())){
return true;
}
else{
return false;
}
}
private void alertDisplayer(String title,String message){
AlertDialog.Builder builder = new AlertDialog.Builder(Purchases.this)
.setTitle(title)
.setMessage(message)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
Intent intent = new Intent(Purchases.this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
ParseUser.logOut();
}
});
AlertDialog ok = builder.create();
ok.show();
}
}
Edit: This is the app_bar_purchases.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">
<TextView
android:id="#+id/txt_puchasesbal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="22dp"
android:text="Balance" />
<EditText
android:id="#+id/Edt_Establishment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="70dp"
android:ems="10"
android:hint="Establishment"
android:inputType="textPersonName" />
<EditText
android:id="#+id/Edt_Particular"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="130dp"
android:ems="10"
android:hint="Particulars"
android:inputType="textPersonName" />
<EditText
android:id="#+id/Edt_purchasesnumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="197dp"
android:ems="10"
android:hint="Amount"
android:inputType="number" />
<Button
android:id="#+id/btn_purchasessave"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="178dp"
android:text="Save" />
</RelativeLayout>
Heres what happen when I try to debug it and put break in boolean same thing happens when I put the break in button save it doesnt show anything on the Debug no errors or anything
EDIT I have pasted the right xml file
EDIT Does having RelativeLayout makes the button not respond?
EDIT I have pasted the whole java class
EDIT I also tried deleting everything else on the onClick except for
Toast.makeText(getApplicationContext(),"Data Saved",Toast.LENGTH_SHORT).show(); just to see if the button itself works but it didn't even show the toast
Please check your button id in xml file it's btn_addbalance
then check your id in java file it's btn_purchasessave
please correct this check below code
your line
final Button save = findViewById(R.id.btn_purchasessave);
replace with
final Button save = findViewById(R.id.btn_addbalance);
it will help to you
I took reference of a SO question,
Try using this :
save.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Toast.makeText(getBaseContext(), "clicked", Toast.LENGTH_LONG).show();
}
});
And import this
import android.view.View.OnClickListener;
EDIT
Casting most of the android views is reduntant now but it can be the problem, Try to caste the button like this :
final Button save = (Button) findViewById(R.id.btn_purchasessave);
and try your code.
EDIT 2
Try using save.setOnClickListener(this) like this,
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private EditText establishmentView;
private EditText particularsView;
private EditText amountView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
establishmentView = (EditText) findViewById(R.id.Edt_Establishment);
particularsView = (EditText) findViewById(R.id.Edt_Particular);
amountView = (EditText) findViewById(R.id.Edt_purchasesnumber);
final Button save = (Button) findViewById(R.id.btn_purchasessave);
save.setOnClickListener(this);
}
#Override
public void onClick(View v) {
//do things here
}
I am unable to find the way to create a popup like info window in map . I have to use it to show the three button inside
Yes
later
No
these three options are clickable.
The pop up will show above three button in vertical manner in recycler view . I have created recycler view and pop up view but how to show it like a Tooltip with clickabe
you can use PopupWindow, its starting with API +23
<?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:background="#FFBBFFBB" android:orientation="vertical" > <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="10dp" android:text="Hello My Window" android:textSize="20sp" /> <Button android:id="#+id/button1" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="10dp" android:text="Button" android:textSize="20sp" /> </LinearLayout>
class
package com.example.hellopopupwindow;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.PopupWindow;
import android.widget.Toast;
public class MainActivity extends Activity {
private Context mContext = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = this;
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
showPopupWindow(view);
}
});
}
private void showPopupWindow(View view) {
// A custom layout, as the display content
View contentView = LayoutInflater.from(mContext).inflate(
R.layout.pop_window, null);
// Set the button click event
Button button = (Button) contentView.findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(mContext, "button is pressed",
Toast.LENGTH_SHORT).show();
}
});
final PopupWindow popupWindow = new PopupWindow(contentView,
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, true);
popupWindow.setTouchable(true);
popupWindow.setTouchInterceptor(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
Log.i("mengdd", "onTouch : ");
return false;
// It returns true if the words, the touch event will be blocked
// PopupWindow onTouchEvent interception is not called, so click on the external area cannot be dismiss
}
});
// If you do not set the PopupWindow background, both the external region click or Back keys are not dismiss box
// I think there is a bug API
popupWindow.setBackgroundDrawable(getResources().getDrawable(
R.drawable.selectmenu_bg_downward));
// After setting the parameter to show
popupWindow.showAsDropDown(view);
}
}
I would like to create checkbox with text that would behave something like what i have below in pseudo code:
Set in text in EditText field
if Button clicked:
create new Checkbox with entered text.
How do i go about doing that in Android?
So far ive got the button :) ... but dont know how to get new Checkbox with text in it ,if its clicked
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.text);
Button create = (Button) findViewById(R.id.button1);
create.setOnClickListener(this);
EditText textInCheckBox = (EditText) findViewById(R.id.editText1);
}
#Override
public void onClick(View v) {
// TODO Automatisch generierter Methodenstub
switch (v.getId()) {
case R.id.button1:
//after creating new checkbox with text in it
//Editbox should restet text field to null;
break;
}
}
}
Here is some code that will demonstrate how to add checkboxes dynamically with the title you entered into the EditText.
MainActivity.java
package com.example.test;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RadioGroup;
import android.widget.Toast;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText txtTitle = (EditText) findViewById(R.id.txtTitle);
final Button btnCreate = (Button) findViewById(R.id.btnCreate);
final RadioGroup radContainer = (RadioGroup) findViewById(R.id.radContainer);
final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
btnCreate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String name = txtTitle.getText().toString().trim();
if (!name.isEmpty()) {
CheckBox checkBox = new CheckBox(MainActivity.this);
checkBox.setText(name);
checkBox.setLayoutParams(params);
radContainer.addView(checkBox);
} else {
Toast.makeText(MainActivity.this, "Enter a title for the checkbox", Toast.LENGTH_SHORT).show();
}
}
});
}
}
activity_main.xml
<?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:gravity="center_horizontal"
android:orientation="vertical"
android:padding="16dp" >
<EditText
android:id="#+id/txtTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:imeOptions="actionDone" />
<Button
android:id="#+id/btnCreate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Create Checkbox" />
<RadioGroup
android:id="#+id/radContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
How would I use a list in this custom dialogue? ive set a list int the .xml of the listview but am unfamiliar with how to use it properly (I want the values for the list to come from a string array)
My main java:
package custom.dialouge.list;
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
public class CustomDialougeListTestActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Context mContext = this;
final Context context = this;
Button button;
button = (Button) findViewById(R.id.button01);
// add button listener
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// custom dialog
final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.list);
dialog.setTitle("List");
// set the custom dialog components - text, image and button
TextView text = (TextView) dialog.findViewById(R.id.TextView01);
text.setText("Test");
Button dialogButton = (Button) dialog.findViewById(R.id.Button01);
// if button is clicked, close the custom dialog
dialogButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
});
}
}
My custom dialouge .xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:id="#+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:text="Back" />
<TextView
android:id="#+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="TextView" />
<ListView
android:id="#+id/listview1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/Button01"
android:layout_alignParentLeft="true"
android:layout_below="#+id/TextView01" >
</ListView>
</RelativeLayout>
Try something like this:
ArrayList<String> myStringArray = ... // insert your code to get/create the array here
ListView view = dialog.findViewById(R.id.listview1);
ArrayAdapter<String> listAdapter = new ArrayAdapter<String> ( this, android.R.layout.simple_list_item_1, myStringArray);
view.setAdapter(listAdapter);
Like so:
public class CustomDialougeListTestActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Context mContext = this;
final Context context = this;
Button button;
ArrayList<String> myStringArray = ... // insert your code to get/create the array here
ArrayAdapter<String> listAdapter = new ArrayAdapter<String> ( this, android.R.layout.simple_list_item_1, myStringArray);
button = (Button) findViewById(R.id.button01);
// add button listener
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// custom dialog
final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.list);
dialog.setTitle("List");
// set the custom dialog components - text, image and button
TextView text = (TextView) dialog.findViewById(R.id.TextView01);
text.setText("Test");
ListView view = dialog.findViewById(R.id.listview1);
view.setAdapter(listAdapter);
Button dialogButton = (Button) dialog.findViewById(R.id.Button01);
// if button is clicked, close the custom dialog
dialogButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
});
}
}
I am looking for a way to close a custom dialog with a button that is inside the xml used in the dialog, alternatively closing it by pressing anywhere on the dialog. What I have is this; a layout with a Image Button that brings up the custom dialog with the content. I have setCanceledOnTouchOutside(true); and that works, but I need the dialog to fill up most of the screen and it can be hard for the user to click in the small space that is available. So how do I do this?
My java code:
import android.app.Activity;
import android.app.Dialog;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
public class Rose extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
this.setRequestedOrientation(
ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.rose);
ImageButton b = (ImageButton) findViewById(R.id.imageButton1);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Dialog d1 = new Dialog(Rose.this);
d1.setContentView(R.layout.tariquet);
d1.setCanceledOnTouchOutside(true);
d1.show();
}
});
}
}
And my XML:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fitsSystemWindows="true"
android:isScrollContainer="true"
android:minHeight="1100dp"
android:minWidth="650dp">
<ImageView
android:src="#drawable/rose_tariquet"
android:id="#+id/imageView1"
android:layout_height="fill_parent"
android:layout_width="fill_parent"></ImageView>
<Button android:text="X"
android:layout_height="wrap_content"
android:id="#+id/button1"
android:layout_width="55dp"
android:layout_gravity="right"></Button>
</FrameLayout>
public class CustomizeDialog extends Dialog implements OnClickListener {
Button close;
TextView tv;
public CustomizeDialog(Context context,String Stringcontent) {
super(context);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.custom_diolog_main);
tv=(TextView) findViewById(R.id.content);
tv.setText(Stringcontent);
close = (Button) findViewById(R.id.close);
close.setOnClickListener(this);
}
#Override
public void onClick(View v) {
if (v == close)
dismiss();
}
}
called:
CustomizeDialog customizeDialog = new CustomizeDialog(CustomDialog.this,"clickme");
customizeDialog.show();