Develop Reference

Android app keeps stopping while building using android studio

When I'm trying to transfer data between activities, I can't get my message and the app keeps crashing,
It show me 'app keeps stopping'
Code in MainActivity.java
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
Intent outIntent;
EditText edtPhone;
EditText edtMessage;
Button btnNext;
String tempText="";
public static final String PHONE = "PHONE";
public static final String MESSAGE = "MESSAGE";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnNext = (Button) findViewById(R.id.btnNext);
btnNext.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View V) {
outIntent = new Intent(MainActivity.this, ActivityTwo.class);
edtPhone = (EditText) findViewById(R.id.edtPhone);
edtMessage = (EditText) findViewById(R.id.edtMessage);
tempText = edtPhone.getText().toString();
outIntent.putExtra(PHONE,tempText);
tempText = edtMessage.getText().toString();
outIntent.putExtra(MESSAGE,tempText);
startActivity(outIntent);
}
});
}
public void closeMethod(View view) {
finish();
}
}
ActivityTwo.java
package com.example.fir;
import android.content.Intent;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.widget.TextView;
public class ActivityTwo extends AppCompatActivity {
Intent incomingIntent;
TextView txtPhone;
TextView txtMessage;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_two);
incomingIntent = getIntent();
txtPhone = (TextView) findViewById(R.id.txtPhone);
txtMessage = (TextView) findViewById(R.id.txtMessage);
txtPhone.setText(incomingIntent.getStringExtra(MainActivity.PHONE));
txtMessage.setText(incomingIntent.getStringExtra(MainActivity.MESSAGE));
}
}
Activitymain.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=".MainActivity" >
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginTop="32dp"
android:text="Phone" />
<EditText
android:id="#+id/editTextPhone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginStart="0dp"
android:layout_marginTop="60dp"
android:ems="10"
android:hint="Phone"
android:inputType="phone"
android:minHeight="48dp" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginTop="124dp"
android:text="Message" />
<EditText
android:id="#+id/editTextTextPersonName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_centerHorizontal="true"
android:layout_marginStart="0dp"
android:layout_marginTop="156dp"
android:layout_marginEnd="3dp"
android:ems="10"
android:hint="Message"
android:inputType=""
android:minHeight="48dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginTop="224dp"
android:orientation="horizontal">
<Button
android:id="#+id/btnNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Next" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="closeMethod"
android:text="CLose" />
</LinearLayout>
</RelativeLayout>
Activitytwo.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=".MainActivity" >
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginTop="32dp"
android:text="Phone" />
<EditText
android:id="#+id/editTextPhone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginStart="0dp"
android:layout_marginTop="60dp"
android:ems="10"
android:hint="Phone"
android:inputType="phone"
android:minHeight="48dp" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginTop="124dp"
android:text="Message" />
<EditText
android:id="#+id/editTextTextPersonName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_centerHorizontal="true"
android:layout_marginStart="0dp"
android:layout_marginTop="156dp"
android:layout_marginEnd="3dp"
android:ems="10"
android:hint="Message"
android:inputType=""
android:minHeight="48dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginTop="224dp"
android:orientation="horizontal">
<Button
android:id="#+id/btnNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Next" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="closeMethod"
android:text="CLose" />
</LinearLayout>
</RelativeLayout>
The issue is when I don't put any value into the firstEditText or secondEditText or both of them and click on any button then the app crashes and a pop up shows "myapp keeps stopping".
I cannot get the text and am unsure of why the app keeps crashing.

you have defined your Edit texts in the first activity with id's named
edtPhone
edtMessage
but there was no edtPhone or edtMessage in your xml.
this issue also repeats in your second activity
you have defined txtPhone and txtMessage
but again there are no such ids in your second activity XML.
keep in mind that these might not be the whole problem as you didn't post any log for the errors. but if there were anything else, ask and we'll help you

EditText autoscroll doesn't work after showing dialog

I'm developing an app for users to share their books. To achieve this, I'm getting different data about the book from the user. The problem is, horizontal autoscrolling of all EditTexts are working until Dialog has been shown and dismissed. Once a dialog has been dismissed on the fragment, horizontal autoscrolling of the EditText's on this layout won't work.
I added:
android:focusable="true"
android:focusableInTouchMode="true"
to parent layout of the edittext but doesn't work.
Also to make sure that autoscrolling is enabled I've added:
android:scrollHorizontally="true"
But none of above helped.
Here is XML code of the fragment layout.
<?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="match_parent"
android:background="#color/white"
android:orientation="vertical"
android:paddingStart="#dimen/dp25"
android:paddingEnd="#dimen/dp25"
tools:context=".UI.Fragments.SharePostFragments.Fragment1.OverViewFragment">
<LinearLayout
android:id="#+id/root_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:focusable="true"
android:focusableInTouchMode="true"
android:orientation="vertical">
<EditText
android:id="#+id/edit_text_name_of_book"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:fontFamily="#font/segoe_ui_semi_bold"
android:hint="#string/name_of_book"
android:inputType="text"
android:maxLength="50"
android:maxLines="1"
android:scrollHorizontally="true"
android:textAlignment="textStart"
android:textColor="#color/colorPrimaryDark"
android:textColorHint="#color/colorPrimaryDark"
android:textSize="#dimen/font22" />
<TextView
android:id="#+id/text_view_number_of_characters"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:layout_marginEnd="#dimen/dp10"
android:fontFamily="#font/segoe_ui_light"
android:text="#string/_0_50"
android:textColor="#color/colorAccent"
android:textSize="#dimen/font16"
tools:ignore="RtlSymmetry" />
<EditText
android:id="#+id/edit_text_name_of_author"
android:layout_width="match_parent"
android:layout_height="#dimen/textBoxHeight"
android:layout_marginTop="#dimen/dp30"
android:background="#drawable/round_text_box_gray"
android:fontFamily="#font/segoe_ui_regular"
android:hint="#string/name_of_writer"
android:inputType="text"
android:paddingStart="20dp"
android:paddingEnd="20dp"
android:textColor="#color/colorPrimaryDark"
android:textColorHint="#color/colorPrimaryDark"
android:textSize="#dimen/font16" />
<RelativeLayout
android:id="#+id/constraint_layout_1"
android:layout_width="match_parent"
android:layout_height="#dimen/textBoxHeight"
android:layout_marginTop="#dimen/dp20"
android:background="#drawable/round_text_box_border_gray"
android:gravity="center_vertical"
android:orientation="horizontal">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_marginTop="3dp"
android:fontFamily="#font/segoe_ui_regular"
android:paddingStart="#dimen/dp20"
android:paddingEnd="#dimen/dp20"
android:text="#string/price_of_book"
android:textColor="#color/colorPrimaryDark"
android:textSize="#dimen/font16" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:paddingStart="#dimen/dp20"
android:paddingEnd="#dimen/dp20"
android:text="#string/azn_sign"
android:textColor="#color/colorPrimaryDark"
android:textSize="#dimen/font16" />
<EditText
android:id="#+id/edit_text_price_of_book"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toStartOf="#+id/textView2"
android:background="#color/white"
android:clickable="false"
android:hint="#string/_0_0"
android:inputType="text|numberDecimal"
android:maxLength="6"
android:singleLine="true"
android:textColorHint="#android:color/black" />
</RelativeLayout>
<LinearLayout
android:id="#+id/constraint_layout_conditions_root"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/dp20"
android:background="#drawable/round_text_box_border_gray"
android:orientation="horizontal">
<LinearLayout
android:id="#+id/linear_layout_1"
android:layout_width="match_parent"
android:layout_height="#dimen/textBoxHeight"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="9"
android:gravity="center_vertical"
android:paddingStart="#dimen/dp20"
android:paddingEnd="#dimen/dp20"
android:text="#string/book_condition_placeholder"
android:textColor="#color/colorPrimaryDark" />
<ImageButton
android:id="#+id/image_button_conditions"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginEnd="#dimen/dp10"
android:layout_weight="1"
android:background="?attr/selectableItemBackgroundBorderless"
android:src="#drawable/ic_spinner" />
</LinearLayout>
<LinearLayout
android:id="#+id/linear_layout_conditions"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:visibility="gone">
<TextView
android:id="#+id/text_view_new"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="#dimen/dp20"
android:paddingTop="#dimen/dp10"
android:paddingEnd="#dimen/dp20"
android:paddingBottom="#dimen/dp10"
android:text="#string/_new"
android:textColor="#color/dark_gray_text_color" />
<TextView
android:id="#+id/text_view_normal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="#dimen/dp20"
android:paddingTop="#dimen/dp10"
android:paddingEnd="#dimen/dp20"
android:paddingBottom="#dimen/dp10"
android:text="#string/normal"
android:textColor="#color/dark_gray_text_color" />
<TextView
android:id="#+id/text_view_old"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="#dimen/dp20"
android:paddingTop="#dimen/dp10"
android:paddingEnd="#dimen/dp20"
android:paddingBottom="#dimen/dp10"
android:text="#string/old"
android:textColor="#color/dark_gray_text_color" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/constraint_layout_languages_root"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/dp20"
android:background="#drawable/round_text_box_border_gray"
android:orientation="horizontal">
<LinearLayout
android:id="#+id/linear_layout_2"
android:layout_width="match_parent"
android:layout_height="#dimen/textBoxHeight"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="9"
android:gravity="center_vertical"
android:paddingStart="#dimen/dp20"
android:paddingEnd="#dimen/dp20"
android:text="#string/language"
android:textColor="#color/colorPrimaryDark" />
<ImageButton
android:id="#+id/image_button_languages"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginEnd="#dimen/dp10"
android:layout_weight="1"
android:background="?attr/selectableItemBackgroundBorderless"
android:src="#drawable/ic_spinner" />
</LinearLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_view_languages"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="#dimen/dp20"
android:paddingEnd="#dimen/dp20"
android:paddingBottom="#dimen/dp10"
android:visibility="gone" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
Fragment Java code:
package org.kitapp.UI.Fragments.SharePostFragments.Fragment1;
import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.fragment.app.Fragment;
import org.kitapp.R;
import org.kitapp.UI.Dialogs.ConditionDialog.ConditionOfBookDialog;
import org.kitapp.UI.Dialogs.LanguageDialog.LanguageDialog;
import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
import butterknife.OnTextChanged;
public class OverViewFragment extends Fragment implements OverViewContractor.View {
private final String TAG = OverViewFragment.class.getSimpleName();
private Context mContext;
private OverViewCallback mListener;
private OverViewPresenter mPresenter;
#BindView(R.id.constraint_layout_conditions_root)
LinearLayout conditionRoot;
#BindView(R.id.constraint_layout_languages_root)
LinearLayout languagesRoot;
#BindView(R.id.linear_layout_conditions)
LinearLayout conditions;
#BindView(R.id.root_layout)
LinearLayout rootLayout;
#BindView(R.id.text_view_number_of_characters)
TextView numberOfChars;
#BindView(R.id.edit_text_name_of_book)
EditText nameOfBook;
public interface OverViewCallback {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_over_view, container, false);
ButterKnife.bind(this, view);
new OverViewPresenter(this);
//rootLayout.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
return view;
}
////// CONTRACTOR METHODS //////
#Override
public void setPresenter(OverViewPresenter presenter) {
this.mPresenter = presenter;
}
////// LISTENERS //////
#Override
#OnClick(R.id.image_button_conditions)
public void showConds() {
ConditionOfBookDialog conditionOfBookDialog = new ConditionOfBookDialog(mContext);
conditionOfBookDialog.show();
}
#Override
#OnClick(R.id.image_button_languages)
public void showLangs() {
LanguageDialog languageDialog = new LanguageDialog(mContext);
languageDialog.show();
}
#Override
#SuppressLint("SetTextI18n")
#OnTextChanged(R.id.edit_text_name_of_book)
public void onNameOfBookChange() {
int len = nameOfBook.getText().toString().trim().length();
numberOfChars.setText(len + "/50");
if (len > 50) {
nameOfBook.setText(nameOfBook.getText().toString().substring(0, 50));
nameOfBook.setSelection(nameOfBook.getText().length());
}
}
////// FRAGMENT METHODS //////
#Override
public void onAttach(Context context) {
super.onAttach(context);
this.mContext = context;
if (context instanceof OverViewCallback) {
mListener = (OverViewCallback) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OverViewCallback");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
}
UI Design and Dialog
In the image above, there are EditTexts Name Of Book and Name of Author. Before showing a dialog, both of them work like a charm. When writing something, the cursor automatically scrolls to the end. Once Dialog has been shown and dismissed, none of them works properly, and the cursor stays at the end of the EditText but still the characters are being written continues in the hidden part.
In this UI it cannot be seen because of the issue, but I've written.
Roses are red, violets are blue, Stackoverflow I love u
But only Roses are red, violets are blue, Stac can be seen.
Weird buggy layout UI image
Please, help me to solve this problem. Thanks in advance.

As a solution, I don't know the underlying reason, but the problem solved once I removed Butterknife library from my project.

ScrollView isn`t working. What should I do?

How can I scroll in my Android app?
I already tried Scrollview but it doesn`t work.
So this is my MainActivity:
package com.example.myapplication2;
import android.content.DialogInterface;
import android.content.Intent;
import android.icu.text.IDNA;
import android.nfc.Tag;
import android.os.PersistableBundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import static com.example.myapplication2.R.id.*;
public class MainActivity extends AppCompatActivity implements BottomNavigationView.OnNavigationItemSelectedListener {
private boolean loadFragment(Fragment fragment){
if(fragment!=null){
getSupportFragmentManager()
.beginTransaction()
.replace(fragment_container, fragment)
.commit();
return true;
}
return false;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BottomNavigationView navigation = findViewById(R.id.bottomnav);
navigation.setOnNavigationItemSelectedListener(this);
getSupportFragmentManager().beginTransaction().replace(fragment_container, new Home_Screen()).commit();
}
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
Fragment fragment = null;
switch(menuItem.getItemId()){
case kontakt:
break;
case Termine:
fragment = new TermineFragment();
break;
case wilkommen:
fragment = new Home_Screen();
break;
}
return loadFragment(fragment);
}
}
And this is my XML file:
<?xml version="1.0" encoding="utf-8"?>
<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"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#color/darkgrey">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="Termine"
android:textSize="30sp"
android:textColor="#color/colorAccent"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
></TextView>
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="173dp"
app:cardCornerRadius="8dp"
android:layout_marginTop="80dp"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
>
<Button
android:text="Mehr infos"
android:layout_width="120dp"
android:layout_height="35dp"
android:id="#+id/button1"
android:layout_weight="1"
android:layout_marginTop="130dp"
android:layout_marginRight="170dp"
/>
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:background="#color/maincolor"
>
</LinearLayout>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="HPI - 29.06.19"
android:textSize="24dp"
/>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="Sitzung: H-E.51"
android:textSize="16dp"
android:layout_marginTop="40dp"
/>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="Juni22, 2019"
android:textSize="16dp"
android:layout_marginTop="40dp"
android:layout_marginRight="20dp"
android:layout_marginLeft="270dp"
/>
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="173dp"
app:cardCornerRadius="8dp"
android:layout_marginTop="270dp"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
>
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:background="#color/colorPrimaryDark"
/>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="HPI - 13.07.19"
android:textSize="24dp"
/>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="Sitzung: H-E.51"
android:textSize="16dp"
android:layout_marginTop="40dp"
/>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="July13, 2019"
android:textSize="16dp"
android:layout_marginTop="40dp"
android:layout_marginRight="20dp"
android:layout_marginLeft="270dp"
/>
</android.support.v7.widget.CardView>
</RelativeLayout>
What should I do? I want these Cardviews in my Scrollview.

Replace your XML layout code with the below. Also, be notified, there seems to be an awkward amount of topMargin between your two cards, not sure if that's intended or not but as of now, there is huge gap between your two cards :
<?xml version="1.0" encoding="utf-8"?>
<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"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#color/darkgrey">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Termine"
android:textSize="30sp"
android:textColor="#color/colorAccent"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" />
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="173dp"
app:cardCornerRadius="8dp"
android:layout_marginTop="80dp"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
>
<Button
android:text="Mehr infos"
android:layout_width="120dp"
android:layout_height="35dp"
android:id="#+id/button1"
android:layout_weight="1"
android:layout_marginTop="130dp"
android:layout_marginRight="170dp" />
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:background="#color/maincolor">
</LinearLayout>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="HPI - 29.06.19"
android:textSize="24dp" />
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="Sitzung: H-E.51"
android:textSize="16dp"
android:layout_marginTop="40dp"/>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="Juni22, 2019"
android:textSize="16dp"
android:layout_marginTop="40dp"
android:layout_marginRight="20dp"
android:layout_marginLeft="270dp" />
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="173dp"
app:cardCornerRadius="8dp"
android:layout_marginTop="270dp"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
>
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:background="#color/colorPrimaryDark"
/>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="HPI - 13.07.19"
android:textSize="24dp"
/>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="Sitzung: H-E.51"
android:textSize="16dp"
android:layout_marginTop="40dp"
/>
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textColor="#color/white"
android:text="July13, 2019"
android:textSize="16dp"
android:layout_marginTop="40dp"
android:layout_marginRight="20dp"
android:layout_marginLeft="270dp"
/>
</android.support.v7.widget.CardView>
</LinearLayout>
</ScrollView>
</RelativeLayout>

Use ScrollView in place of RelativeLayout. Add a LinearLayout with vertical orientation before the first TextView and close the LinearLayout after the CardView.

I am having problems programming java on aide app

The app is supposed to call one screen from another and use the other screen's layout components. Whenever I try to call a component, such as ImageButton, it says that member id is unknown, I told my teacher and he says that it shouldn't happen. I have tried renaming the components and even made a new project.
How can I fix it?
the error is in R.id
package com.movil.ejemploventanas;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.ImageButton;
public class DatosPersonales extends Activity {
EditText vEdtNom,vEdtEdad;
ImageButton vBtnOrigen,vBtnSantuario;
Intent intnEnvio;
Bundle bndContenedorEnvio;
String strNom;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.datospersonales);
vEdtNom=(EditText)findViewById(R.id.edtNom);
vEdtEdad=(EditText)findViewById(R.id.edtEdad);
vBtnOrigen=(ImageButton)findViewById(R.id.btnOrigen);
vBtnSantuario=(ImageButton)findViewById(R.id.btnSantuario);
intnEnvio=new Intent(DatosPersonales.this,Caracteristicas.class);
bndContenedorEnvio=new Bundle();
vBtnOrigen.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View arg0){
strNom=vEdtNom.getText().toString();
bndContenedorEnvio.putString("nom",strNom);
bndContenedorEnvio.putString("edad", vEdtEdad.getText().toString());
bndContenedorEnvio.putString("opc","1");
intnEnvio.putExtras(bndContenedorEnvio);
startActivity(intnEnvio);
}
});
vBtnSantuario.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View arg0){
strNom=vEdtNom.getText().toString();
bndContenedorEnvio.putString("nom",strNom);
bndContenedorEnvio.putString("edad",vEdtEdad.getText().toString());
bndContenedorEnvio.putString("opc","2");
intnEnvio.putExtras(bndContenedorEnvio);
startActivity(intnEnvio);
}
});
}
}
<?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:gravity="center_horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="#+id/txtLetrero"
style="style/titulo"
android:layout_centerHorizontal="true"
android:text="#string/letMariposa"/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/txtLetrero"
android:id="#+id/linearlayout1"
android:layout_centerHorizontal="true"
android:layout_marginTop="66dp">
<TextView
android:id="#+id/txtNom"
style="style/letreros"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="string/nom"/>
<EditText
android:id="#+id/edtNom"
style="style/datos"
android:layout_width="220dp"
android:layout_height="wrap_content"
android:inputType="textPersonName"/>
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/linearLayout1"
android:id="#+id/linearlayout2"
android:layout_centerHorizontal="true">
<TextView
android:id="#+id/txtEdad"
style="style/letreros"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="#string/edad"
android:textAlignment="gravity"/>
<EditText
android:id="#+id/edtEdad"
style="style/datos"
android:layout_width="220dp"
android:ems="10"
android:layout_height="wrap_content"
android:inputType="number"/>
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/origen"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_below="#+id/linearLayout2"
android:layout_marginLeft="30dp"
android:layout_marginTop="200dp"
android:id="#+id/textView4"
style="style/letreros"/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:layout_below="#id/textView4"
android:layout_marginLeft="80dp"
android:id="#+id/btnOrigen"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/sant"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_below="#+id/btnOrigen"
android:layout_marginLeft="120dp"
android:id="#+id/textView5"
style="style/letreros"/>
<ImageButton
android:id="#+id/btnSantuario"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textView5"
android:layout_marginLeft="180dp"/>
</RelativeLayout>

Relative layout alignment in android

In the below posted code, i'm not able to see the text in single line and at a time i want only 6 text to be displayed, but i'm able to see morethan 20 text's. can you have a look once why it is..
i need my view to be like this, full view should be covered by 6 texts only 3 by 3
|afsafasfaf afasfaffasfas|
| |
|cascsdfs asdaddasdada|
| |
Mainactivity.java
package com.example.sampleoporj;
import android.os.Bundle;
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
public class MainActivity extends Activity {
Button mbutton;
MainActivity activity;
LinearLayout mEventsLayout;
HorizontalScrollView mHorizontalscroll;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mbutton = (Button)findViewById(R.id.button1);
mEventsLayout = (LinearLayout)findViewById(R.id.eventslayout);
mbutton.setOnClickListener(btnlistener);
activity = this;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
OnClickListener btnlistener = new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
for(int i = 0 ;i <10 ; i++)
{
LayoutInflater inflater = activity.getLayoutInflater();
View view = (View)inflater.inflate(R.layout.samplelayout,null);
mEventsLayout.addView(view);
}
}
};
}
Activity_main.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"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:id="#+id/helloworld"
android:text="#string/hello_world" />
<HorizontalScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/helloworld"
android:id="#+id/horizontalscroll">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/eventslayout"></LinearLayout>
</HorizontalScrollView>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginRight="18dp"
android:layout_toLeftOf="#+id/helloworld"
android:text="Button" />
</RelativeLayout>
Samplelayout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".45"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".10"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<ImageView
android:id="#+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<ImageView
android:id="#+id/imageView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".45"
android:orientation="vertical" >
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
i request the output should look like this, i need a horizontal scroll & at a time i need only 3 + 3 text to display (in image i have showed only 2 + 2 ). As i notice horizontal scroll shrinks if i add linearlayout with "fill_parent" param.