I have the activity_main XML like this:
<LinearLayout ...>
<EditText android.id="#+id/edit_text"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="#string/edit_message" />
<Button android.id="#+id/my_send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_send"
android:onClick="sendMessage" />
</LinearLayout>
The main java codes are:
public class MainActivity extends Activity {
void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
EditText editText = (EditText) findViewById(R.id.edit_text);
if (editText == null)
Log.v("editText", "null editText");
else
Log.v("editText", "good editText");
}
}
The display is correct and I can see the EditText and Button fields. However, I always got NULL for editText. I read the previous problems. Most of them were due to the fact that setContentView(R.layout.active_main) was not used. But I can't find out why I am having problem with my codes. Any help is greatly appreciated.
Your XML has problem
android:id not android.id
You were using . instead of :. So please make your correction as below:
<LinearLayout ...>
<EditText android:id="#+id/edit_text"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="#string/edit_message" />
<Button android:id="#+id/my_send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_send"
android:onClick="sendMessage" />
</LinearLayout>
Related
I only want my textview with id clickable_txtView to be clickable in relative layout. Here is the code -
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#android:id/empty"
android:clickable="false">
<ImageView
android:layout_width="120sp"
android:layout_height="130sp"
android:layout_centerHorizontal="true"
android:src="#drawable/flower"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:paddingTop="120sp"
android:text="Dont click me />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/clickable_txtView"
android:gravity="center"
android:paddingTop="140sp"
android:clickable="true"
android:text="Click me" />
</RelativeLayout>
#OnClick(R.id.clickable_txtView)
public void txtViewClick() {
//Some event
}
Thr problem is I am able to click whole relative layout and some event happens after onclicking relative layout.
How do I avoid this and make it limited to text view only.
Your textview has an attribute android:paddingTop="140sp" which basically wraps over the entire relative layout, because of which you are having the problem with onClick behaviour.
Use this RelativeLayout structure (provide ID to the "don't click me" textview, and place the "clickable textview" below it.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/empty"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center">
<ImageView
android:layout_width="120sp"
android:layout_height="130sp"
android:layout_centerHorizontal="true"
android:src="#mipmap/ic_launcher"
android:layout_alignParentTop="true"
/>
<TextView
android:id="#+id/do_not_click"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:paddingTop="120sp"
android:enabled="false"
android:text="Dont click me" />
<TextView
android:id="#+id/clickable_txtView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clickable="true"
android:gravity="center"
android:layout_below="#id/do_not_click"
android:text="Click me" />
</RelativeLayout>
In your activity where you are inflating this view try this:
first initialize your textview
TextView textView = (TextView) findViewById(R.id.clickable_txtView);
then apply clickListner on it
textView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Do your work here
}
});
I'm not sure but you can try adding below line to your parent layout
android:touchscreenBlocksFocus="true"
like
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#android:id/empty"
android:touchscreenBlocksFocus="true">
This question already has answers here:
Get Value of a Edit Text field
(13 answers)
Closed 6 years ago.
I've tried get edittext value but does not work.This is my code in android fragment:
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View v=inflater.inflate(R.layout.fragment_add_patient, container, false);
final EditText FirstName=(EditText) v.findViewById(R.id.FirstName);
final Button addPatientButton=(Button) v.findViewById(R.id.AddPatientButton);
addPatientButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(isOnline()) {
try {
if (FirstName.getText().toString().trim().equals("")) {
FirstName.setError("First Name is required!");
return;
}
I receive error at this line :FirstName.getText().toString().trim().equals("")
The error is following: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference.
Here is my fragment_add_patient xml file which contains all items.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.ionut.myapplication.PatientController.AddPatientFragment">
<!-- TODO: Update blank fragment layout -->
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="80dp"
android:id="#+id/PatientFirstName"
android:hint="First Name" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:layout_marginTop="27dp"
android:id="#+id/PatientLastName"
android:hint="Last Name"
android:layout_below="#+id/PatientFirstName"
android:layout_alignLeft="#+id/PatientFirstName"
android:layout_alignStart="#+id/PatientFirstName" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:ems="10"
android:layout_below="#+id/PatientLastName"
android:layout_alignRight="#+id/PatientLastName"
android:layout_alignEnd="#+id/PatientLastName"
android:layout_marginTop="25dp"
android:id="#+id/Email"
android:hint="Email" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="number"
android:ems="10"
android:layout_marginTop="22dp"
android:id="#+id/PatientAge"
android:hint="Age"
android:layout_below="#+id/Email"
android:layout_alignLeft="#+id/Email"
android:layout_alignStart="#+id/Email" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="phone"
android:ems="10"
android:layout_below="#+id/PatientAge"
android:layout_alignLeft="#+id/PatientAge"
android:layout_alignStart="#+id/PatientAge"
android:layout_marginTop="32dp"
android:id="#+id/PatientPhone"
android:hint="Phone" />
<Button
android:text="Add Patient"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/AddPatientButton"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="77dp" />
<Spinner
android:id="#+id/cspinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="25dp"
android:layout_below="#+id/PatientPhone"
android:layout_alignRight="#+id/PatientPhone"
android:layout_alignEnd="#+id/PatientPhone"
android:layout_alignLeft="#+id/PatientPhone"
android:layout_alignStart="#+id/PatientPhone" />
Thanks in advance!.
The FirstName EditText is null because the findViewById method is trying to find an editext with the id of FirstName but the correct id is PatientFirstName
To solve the issue, replace the
final EditText FirstName=(EditText) v.findViewById(R.id.FirstName);
with
final EditText FirstName=(EditText) v.findViewById(R.id.PatientFirstName);
Simply you are trying to query of non existing id in your layout .
the actual id for your "First Name" EditText is "PatientFirstName". also try to make your code just a little bit organized as follows
1- Declare your Button , EditText variables as a global variable to be accessible anywhere inside your fragment
2- if you gonna add more buttons with click events then you should make your fragment or activity implements the View.onClickListener
I need a TextView which scrolls automatically vertically. This is my layout code:
activity_info.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/iView"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_centerHorizontal="true"
android:contentDescription="#string/info"
android:src="#mipmap/infoImage" />
<TextView
android:id="#+id/tView"
android:layout_below="#+id/iView"
android:layout_width="match_parent"
android:layout_height="300dp"
android:layout_centerHorizontal="true"
android:maxLines="500"
android:scrollbars="vertical" />
<RelativeLayout
android:layout_below="#+id/tView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:gravity="center">
<Button
android:id="#+id/buttonYes"
android:layout_width="100dp"
android:layout_height="50dp"
android:text="YES" />
<Button
android:id="#+id/buttonNo"
android:layout_toEndOf="#id/buttonYes"
android:layout_width="100dp"
android:layout_height="50dp"
android:text="NO" />
</RelativeLayout>
</RelativeLayout>
I read that I have to input this line:
tView.setMovementMethod(new ScrollingMovementMethod())
into my onCreate method in my activity:
InfoActivity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_info);
TextView tView = (TextView) findViewById(R.id.tView);
tView.setMovementMethod(new ScrollingMovementMethod());
}
If I do that, the TextView does not scroll automatically, if some new input (text) is inserted into the View. I know there are some other questions concerning the problem. But I've tried most of them.
How can I solve this problem?
Try to set the textView to android:gravity="bottom"
and use textView.append("\n"+"New Input Text."); for new input text;
You are almost there. Just add a few more things to achieve this,
First of all add those properties in your TextView
android:maxLines = "AN_INTEGER"
android:scrollbars = "vertical"
android:gravity="bottom"
Secondly as usual use,
tView.setMovementMethod(new ScrollingMovementMethod());
This should solve your problem.
I would suggest wrapping your TextView in a ScrollView
<ScrollView
android:id="#+id/sView"
android:layout_below="#+id/iView"
android:layout_width="match_parent"
android:layout_height="300dp"
android:layout_centerHorizontal="true" >
<TextView
android:id="#+id/tView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:maxLines="500"
android:scrollbars="vertical"
android:gravity="bottom" />
</ScrollView>
You can append new text by doing
public void appendAndScrollDown(String someText) {
tView.append("\n" + someText);
sView.fullScroll(View.FOCUS_DOWN);
}
I have two TextView which I want to put a custom font on.
In the OnCreate of my MainActivity, after the setContentView call, I wrote the following code:
Typeface myTypeface = Typeface.createFromAsset(getAssets(), "fonts/BernerBasisschrift1.ttf");
TextView welcomeTextView = (TextView)findViewById(R.id.welcome_message);
TextView introTextView = (TextView)findViewById(R.id.introduction_message);
welcomeTextView.setTypeface(myTypeface);
introTextView.setTypeface(myTypeface);
But for some reason, the font stays default.
The app runs on Galaxy S6 Edge device (Lollipop 5.0.2).
I read here that there's a problem with custom fonts on Lollipop, and in order to fix it I converted my font with the tool provided in the thread to ttx and vice versa, but even this didn't help.
Any ideas what can I do?
Edit:
Tested on Jellybean (4.3), not working either.
Another edit:
It works on a clean new project! Cant figure out the difference.
Putting the MainActivity and its' XML for help:
public class MainActivity extends FragmentActivity {
private LoginFragment loginFragment;
private TextView welcomeTextView;
private TextView introTextView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
hideActionBar();
setContentView(R.layout.activity_main);
welcomeTextView = (TextView)findViewById(R.id.welcome_message);
introTextView = (TextView)findViewById(R.id.introduction_message);
Typeface myTypeface = Typeface.createFromAsset(getAssets(), "fonts/BernerBasisschrift1.ttf");
welcomeTextView.setTypeface(myTypeface);
introTextView.setTypeface(myTypeface);
if (savedInstanceState == null) {
// Add the fragment on initial activity setup
loginFragment = new LoginFragment();
getSupportFragmentManager().beginTransaction()
.add(android.R.id.content, loginFragment, "facebookFragment").commit();
}
}
#Override
public void onWindowFocusChanged(boolean hasFocus) {
if(hasFocus){
// get all views on screen
ArrayList<View> views = new ArrayList<View>()
{{
add(findViewById(R.id.welcome_message));
add(findViewById(R.id.introduction_message));
add(findViewById(R.id.below_login));
add(findViewById(R.id.above_login));
add(findViewById(R.id.authButton));
add(findViewById(R.id.logo));
}};
// set animations
for(View view : views)
YoYo.with(Techniques.Tada).duration(700).playOn(view);
}
}
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
public void hideActionBar(){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
getActionBar().hide();
}
And the activity's XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/main_background">
<ImageView
android:id="#+id/logo"
android:layout_width="256dp"
android:layout_height="101dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="40dp"
android:background="#drawable/logo" />
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_marginStart="20dp"
android:layout_marginLeft="20dp"
android:layout_marginEnd="20dp"
android:layout_marginRight="20dp">
<TextView
android:id="#+id/welcome_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="#string/welcome_message"
android:textColor="#color/White"
android:textSize="25sp"
style="#style/ShadowStyleText"
android:gravity="center" />
<TextView
android:id="#+id/introduction_message"
android:layout_below="#+id/welcome_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="#string/introduction_message"
android:textColor="#color/White"
android:textSize="18sp"
android:gravity="center"
style="#style/ShadowStyleText"
android:layout_marginTop="5dp" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/bottom_login_chunk"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="50dp"
android:layout_marginStart="50dp"
android:layout_marginLeft="50dp"
android:layout_marginEnd="50dp"
android:layout_marginRight="50dp">
<TextView
android:id="#+id/above_login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="#string/above_login_button"
android:textColor="#color/White"
android:textSize="18sp"
style="#style/ShadowStyleText"
android:gravity="center" />
<com.facebook.widget.LoginButton
android:id="#+id/authButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/above_login"
android:layout_centerHorizontal="true"
android:layout_marginBottom="5dp"
android:layout_marginTop="5dp" />
<TextView
android:id="#+id/below_login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/authButton"
android:layout_centerHorizontal="true"
android:text="#string/below_login_button"
android:textColor="#color/White"
style="#style/ShadowStyleText"
android:textSize="14sp" />
</RelativeLayout>
</RelativeLayout>
Ok so I found out recently that the facebook login button caused the problem, since everything worked when it was commented out.
So basically to solve this problem use another method to show the button instead using support fragment manager; sdk docs has lots of examples.
I have read many post similar to this, but none of them resolved my problem. Another funny thing is, on the emulator the place for the edittext is held (meaning other widgets are shifted down), but is not shown, on the other hand the same implementation on the real phone doesn't even show a place for the widget. I have the following LinearLayout inside which I need to dynamically add an EditText widget when the TextView Add a Team Member is clicked.
<LinearLayout
android:id="#+id/layout_add_task"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/separator"
android:layout_margin="5dp"
android:background="#color/yellow_background"
android:orientation="vertical"
android:padding="5dp">
<LinearLayout
android:id="#+id/layout_task_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="#+id/iv_check_research_tasks"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/icon_check_empty" />
<EditText
android:id="#+id/et_task_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:selectAllOnFocus="true"
android:text="Task Name"
android:textSize="20dp"
android:textStyle="bold" />
</LinearLayout>
<TextView
android:id="#+id/tv_add_team_member"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginTop="5dp"
android:text="Add a team member"
android:textColor="#color/text_green"
android:textSize="15dp"
android:textStyle="bold" />
<LinearLayout
android:id="#+id/ll_add_task"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/tv_add_team_member"
android:orientation="horizontal"
android:weightSum="100" >
<ImageView
android:id="#+id/iv_create_assignment_attach"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="10"
android:src="#drawable/icon_flag_alt" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="5dp"
android:layout_weight="15"
android:text="Due"
android:textSize="15dp" />
<EditText
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="65"
android:hint="None"
android:selectAllOnFocus="true" />
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="10"
android:src="#drawable/icon_calendar_empty" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="horizontal" >
<Button
android:id="#+id/btn_create_assignment_trash"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="30dp"
android:layout_marginTop="5dp"
android:text="Trash" />
<Button
android:id="#+id/btn_create_assignment_done"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_marginTop="5dp"
android:text="Done" />
</LinearLayout>
</LinearLayout>
Here is the Java code, the onClickListener implementation of the TextView.
tvAddTeamMember.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
LinearLayout ll = (LinearLayout) getActivity().findViewById(R.id.layout_task_name);
EditText et = new EditText(getActivity());
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
et.setLayoutParams(p);
et.setText("Text");
ll.addView(et);
}
You may proceed this way ! This is not what you're looking for. But your problem will get resolved.
1) By default add the EditText view in your XML and make it invisible.
2) On Clicking the TextView, make it visible.
enjoy !
Hi #Anas Azeem: your code is correct.through your code we can add editetxt to linear layout dynamically. problem is in the layout file only.in the layout mentioned the orientation for added layout as "horizontal" ,instead of that one use "vertical" like below
<LinearLayout
android:id="#+id/layout_task_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<ImageView
android:id="#+id/iv_check_research_tasks"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher" />
<EditText
android:id="#+id/et_task_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:selectAllOnFocus="true"
android:text="Task Name"
android:textSize="20dp"
android:textStyle="bold" />
</LinearLayout>
Try to change the line :
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
With this:
android.widget.LinearLayout.LayoutParams p= new android.widget.LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
//Then do your work
If you know you might be adding a layout, you could always declare ViewStub. After that you simply find the viewStub and call inflate() on it:
ViewStub stub = (ViewStub) findViewById(R.id.stub);
View inflated = stub.inflate();
This is the promoted way to do that in Android SDK. Thanks to that you can define the infalte layout in an xml file.
Try with this code.
replace ur line ll.addView(et);
by::
ll.addView(et,p);
and delete ur line et.setLayoutParams(p);
A simple way to do this.
Button add = (Button) findViewById(R.id.add_checkpoint);
final LinearLayout layout = (LinearLayout) findViewById(R.id.addLayout);
// layout has assigned weight = "1.0" in xml & it's a child of ScrollView
add.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
LayoutInflater oLayoutInflater = getLayoutInflater();
// oView is declared globally & Layout "row_checkpoint" contains a EditText
oView = oLayoutInflater.inflate(R.layout.row_checkpoint, null);
final EditText speciesEditText = (EditText) oView
.findViewById(R.id.checkpoint);
speciesEditText.setId(layout.getChildCount());
// Perform whatever required over EditText, same way you can add more elements.
layout.addView(oView);
}
});
Hope it will help.