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Only able to navigate to the extra layout for the first click

The following code is trivial but simulates the problem.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">
<Button
android:id="#+id/btnGoToExtra"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="266dp"
android:text="Go To Extra"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
layout_extra.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">
<Button
android:id="#+id/btnBackToMain"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="186dp"
android:text="Back To Main"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.btnGoToExtra)
.setOnClickListener(v -> {
setContentView(R.layout.layout_extra);
findViewById(R.id.btnBackToMain)
.setOnClickListener(vv -> {
setContentView(R.layout.activity_main);
});
});
}
}
Question
I can navigate to the layout_extra from activity_main and return to activity_main. Unfortunately, after this round trip, I can no longer be able to navigate to layout_extra anymore.
What causes this problem and how to fix it?

Explanation will follow in chat but that is not how it is supposed to be done, For views to change, You have other options like using Fragments or using new activity entirely, I would also like to suggest moving to kotlin.
public class MainActivity extends AppCompatActivity {
View mainView;
View extraView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mainView = getLayoutInflater().inflate(R.layout.activity_main, null);
extraView = getLayoutInflater().inflate(R.layout.layout_extra, null);
setContentView(mainView);
mainView.findViewById(R.id.btnGoToExtra)
.setOnClickListener(v -> {
setContentView(extraView);
});
extraView.findViewById(R.id.btnBackToMain)
.setOnClickListener(vv -> {
setContentView(mainView);
});
}
}

Reading through the snippet above, here's how everything went
The line
findViewById(R.id.btnGoToExtra)
.setOnClickListener
Registers Button with id btnGoToExtra for click events and when that happens you have the nested
findViewById(R.id.btnBackToMain)
.setOnClickListener
Which registers the element with id backToMain for click events and that's all
Calling setContentView() multiple times is not recommended. The normal way to switch between layouts in the same activity is to use a ViewFlipper or FrameLayout
From here
You then have:
XML
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ImageView
android:src="#drawable/icon"
android:scaleType="fitCenter"
android:layout_height="fill_parent"
android:layout_width="fill_parent"/>
<TextView
android:text="Learn-Android.com"
android:textSize="24sp"
android:textColor="#000000"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:gravity="center"/>
</FrameLayout>
code
private void SwitchLayout2() {
RelativeLayout Layout1 = (RelativeLayout)findViewById(R.id.layout1);
RelativeLayout Layout2 = (RelativeLayout)findViewById(R.id.layout2);
// Enable Layout 2 and Disable Layout 1
Layout1 .setVisibility(View.GONE);
Layout2.setVisibility(View.VISIBLE);
}
private void SwitchLayout1() {
RelativeLayout Layout1 = (RelativeLayout)findViewById(R.id.layout1);
RelativeLayout Layout2 = (RelativeLayout)findViewById(R.id.layout2);
// Enable Layout 1 & Disable Layout2
Layout1.setVisibility(View.VISIBLE);
Layout2.setVisibility(View.GONE);
}

How to put programmatically created Horizontally Scrolling view with XML created Layout in Android?

In my app a user can select multiple images from gallery then he can view it within the app.
I have three buttons within a Relative Layout
<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.codenemesis.multipleimg.MainActivity">
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="imageSelector"
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="up"
android:text="Upload"/>
<Button
android:id="#+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="viewclick"
android:text="View Images" />
To show the images I programmatically created ImageView array within HorizontalScrollView set to WRAP_CONTENT but the problem is when I click on view button HorizontalScrollView span over the whole screen like this.
I want to show HorizontalScrollView below view button. How can I do it?
Here is how I created HorizontalScrollView
HorizontalScrollView horizontalScrollView = new HorizontalScrollView(this);
LinearLayout linearLayout = new LinearLayout(this);
ViewGroup.LayoutParams prams = new ViewGroup.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
linearLayout.setLayoutParams(prams);
linearLayout.setOrientation(LinearLayout.HORIZONTAL);
horizontalScrollView.addView(linearLayout);
// mArrayUri is the arraylist of images selected from gallery
int b = mArrayUri.size();
int c = 0;
ImageView[] imageViews = new ImageView[mArrayUri.size()];
while (c < mArrayUri.size()) {
imageViews[c] = new ImageView(this);
imageViews[c].setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
imageViews[c].setPadding(10,0,10,0);
imageViews[c].setImageURI(mArrayUri.get(c));
linearLayout.addView(imageViews[c]);
c++;
// Set context view
setContentView(horizontalScrollView);

The code in your xml file should be like this
<?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.test.myapplication.MainActivity">
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="select images"
android:onClick="imageSelector"/>
<Button
android:id="#+id/button2"
android:layout_toRightOf="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="up"
android:text="Upload"/>
<Button
android:id="#+id/button3"
android:layout_toRightOf="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="viewclick"
android:text="View Images" />
<RelativeLayout
android:id="#+id/parent_panel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/button"
android:layout_marginTop="10dp"
>
</RelativeLayout>
The code in you java file should be like this
public class MainActivity extends AppCompatActivity {
RelativeLayout relativeLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
relativeLayout=findViewById(R.id.parent_panel);
}
public void imageSelector(View view)
{
}
public void up(View view)
{
}
public void viewclick(View view)
{
HorizontalScrollView horizontalScrollView =
new HorizontalScrollView(this);
LinearLayout linearLayout = new LinearLayout(this);
ViewGroup.LayoutParams prams = new ViewGroup.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
linearLayout.setLayoutParams(prams);
linearLayout.setOrientation(LinearLayout.HORIZONTAL);
horizontalScrollView.addView(linearLayout);
// mArrayUri is the arraylist of images selected from gallery
int b = mArrayUri.size();
int c = 0;
ImageView[] imageViews = new ImageView[mArrayUri.size()];
while (c < mArrayUri.size()) {
imageViews[c] = new ImageView(this);
imageViews[c].setLayoutParams(new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
imageViews[c].setPadding(10, 0, 10, 0);
imageViews[c].setImageURI(mArrayUri.get(c));
linearLayout.addView(imageViews[c]);
c++;
}
relativeLayout.addView(horizontalScrollView);
}
}
This should do the trick for you.

Using GridView and LinearLayout , Gridview is expressed in the top on display

I am designing layout as follows.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
<ScrollView
<LinearLayout
<LinearLayout
<TextViewなど
.
.
.
</LinearLayout>
<LinearLayout
<packagename.ExpandableHeightGridView
</LinearLayout>
</LinearLayout>
</ScrollView>
I was executing the program on the nexus5.
It is as follows, Gridview is expressed in the top on display.
enter image description here
If I scroll to the top, then LinearLayout is expressed.
enter image description here
I tried to adjust the layout.
But GridView wasn't adjusted.
I want to set LinearLayout to the top at first.
public class Activity_CommunicationSpace_MemberList extends Activity {
private List<Data_User> objects = new ArrayList<Data_User>();
private Data_User item = new Data_User();
private String user_name;
private Bitmap user_icon;
private Bitmap user_profile;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_communicationspace_memberlist);
user_name = "Test_Test";
user_icon = BitmapFactory.decodeResource(getResources(), R.drawable.icon_lamborghini);
for (int i = 0; i < 60; i++) {
item = new Data_User();
item.setNameData(user_name);
item.setIconData(user_icon);
objects.add(item);
}
Adapter_CommunicationSpace_MemberList adapter = new Adapter_CommunicationSpace_MemberList(getApplicationContext(), R.layout.adapter_communicationspace_memberlist, objects);
ExpandableHeightGridView expandableHeightGridView = (ExpandableHeightGridView) findViewById(R.id.gridview_communicationspace_memberlist);
expandableHeightGridView.setExpanded(true);
expandableHeightGridView.setAdapter(adapter);
final ScrollView scrollView = (ScrollView) findViewById(R.id.activity_communicationspace_memberlist_scrollView);
scrollView.post(new Runnable() {
public void run() {
scrollView.fullScroll(ScrollView.FOCUS_UP);
}
});
}

If Listview And Gridview Are in Bottom Then its Scroll itself. they Does'nt need Scrollview or ExpendeableGridview in This Case
U Should Try This Layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
</LinearLayout>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="Country Codes"
android:textSize="20sp" />
<Button
android:id="#+id/findSelected"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Get Selected Items" />
<GridView
android:id="#+id/listView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="auto_fit"/></LinearLayout>

Why layout does not become invisible?

So my layout is still visible, maybe someone sees mistake? I want to dispear it when infoButton(imagebutton) is clicked.
FrameLayout infolayout;
infolayout = (FrameLayout) findViewById(R.id.infoLayout);
public void infoPressed(View v){//info button is pressed by user
//infoLayout.setVisibility(View.GONE);
infolayout.setVisibility(View.INVISIBLE);
}
<FrameLayout
android:layout_width="193dp"
android:layout_height="200dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignBottom="#+id/serviceLayout"
android:id="#+id/infoLayout">
I wacthed: How to change visibility of layout programaticly
EDITED:
wrong code part, still not working for me

*Try this**
<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.demo.MainActivity" >
<FrameLayout
android:id="#+id/serviceLayout"
android:layout_width="match_parent"
android:layout_height="150dp"
android:background="#000000" />
<Button
android:id="#+id/btnHide"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:onClick="infoPressed"
android:text="Hide" />
</RelativeLayout>
MainActivity.java
public class MainActivity extends Activity
{
FrameLayout infolayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
infolayout = (FrameLayout) findViewById(R.id.serviceLayout);
}
public void infoPressed(View v){ //info button is pressed by user
//infoLayout.setVisibility(View.GONE);
infolayout.setVisibility(View.INVISIBLE);
}
}

if your ID declaration is correct I guess you have to change the line
infolayout.setVisibility(View.INVISIBLE);
to
infolayout.setVisibility(FrameLayout.INVISIBLE);

Slide Down Android (no animation)

Hi I need some help in understand this property/functionality from Android...
Maybe I can looking around for something wrong... but I'm almost sure that I need use the slide down "property" to see the rest of my textview... rigth?
But how? I am not understanding the flow...
public class PrintBtInvoice extends Activity
{
String constActivityName = "PrintBtInvoice";
// ------------------------------------------------------------------------
ScrollView sView = null;
TextView txtIDorder = null;
TextView txt2Print = null;
TextView txt2View = null;
Button btnBack = null;
Button btnPrint = null;
public void onCreate(Bundle savedInstanceState)
{
sView = (ScrollView) findViewById(R.id.scrollView );
txtIDorder = (TextView) findViewById(R.id.txtPBIorderId);
txt2Print = (TextView) findViewById(R.id.txtPBIinvoice2print);
txt2View = (TextView) findViewById(R.id.txtPBIinvoice2view);
btnBack = (Button) findViewById(R.id.btnPBIback);
btnPrint = (Button) findViewById(R.id.btnPBIprint);
...
}
btnPrint.setOnClickListener(new OnClickListener()
{ ... }
}
What I need to do to see the rest of my text2Print??
Changes suggested :)
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/scrollView"
android:layout_gravity="center_horizontal" >
<TextView
android:id="#+id/txtPBIinvoice2print"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_below="#+id/btnPBIback"
android:layout_toLeftOf="#+id/btnPBIprint"
android:text="#string/app_blank" />
</ScrollView>

I think you need to put your TextView into ScrollView. This way you would be able to scroll your text down and see it. Here is the sample XML layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/scrollView"
android:layout_gravity="center_horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:id="#+id/textView" />
</ScrollView>
</LinearLayout>