Develop Reference

Getting error in changing co-ordinates of imageview in android studio

I am a beginner to android. I want to slide a slidebar in a horizontal linear layout but when I run the code, the application ends giving error FallingBall keeps stopping
My 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">
<LinearLayout
android:id="#+id/linearLayout2"
android:layout_width="0dp"
android:layout_height="0dp"
android:orientation="vertical"
android:weightSum="100"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:id="#+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="72"
android:orientation="horizontal" >
<TextView
android:id="#+id/textView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Hello" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="8"
android:orientation="horizontal">
<ImageView
android:id="#+id/slideBar"
android:layout_width="100dp"
android:layout_height="match_parent"
app:srcCompat="#android:drawable/bottom_bar" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="20"
android:orientation="horizontal">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageButton
android:id="#+id/leftBut"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#android:color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/left_but"
android:onClick="hitLeft"/>
<ImageButton
android:id="#+id/rightBut"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#android:color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/right_but"
android:onClick="hitRight"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
My java file is like this:
package com.example.fallingball;
import androidx.appcompat.app.AppCompatActivity;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity {
ImageView s = findViewById(R.id.slideBar);
float x = s.getX();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
void hitLeft(View view){
x--;
s.setX(30);
}
void hitRight(View view){
x++;
s.setX(40);
}
}
Note: leftBut and rightBut are two Image button and I have copied the images to the drawable folder so if you are trying this code on your system, make sure you adjust this else it will show you Image not found or so...

In MainActivity.java you should initialize your value into onCreate() method
ImageView s;
float x;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
s = findViewById(R.id.slideBar);
x = s.getX();
}

Well, I found my own mistake. The thing what hossein answered earlier was right but the application was still crashing. Actually the problem was coming that I was triggering the methods hitLeft and hitRight which were not initialized as public. That was the mistake and now it is working alright...

i've been trying to get a bottom sheet below on a map and i'm getting an error which i don't know where it's coming from

This is my code
Welcome.java
package com.example.yanitow;
import com.example.yanitow.Tools;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.coordinatorlayout.widget.CoordinatorLayout;
import androidx.fragment.app.FragmentActivity;
import android.app.Dialog;
import android.location.Location;
import android.location.LocationListener;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.material.bottomsheet.BottomSheetBehavior;
import com.google.android.material.bottomsheet.BottomSheetDialogFragment;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import butterknife.ButterKnife;
import butterknife.OnClick;
public class Welcome extends AppCompatActivity {
private GoogleMap mMap;
private BottomSheetBehavior bottomSheetBehavior;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
initMapFragment();
initComponent();
Toast.makeText(this, "Swipe up bottom sheet", Toast.LENGTH_SHORT).show();
}
private void initComponent() {
// get the bottom sheet view
LinearLayout llBottomSheet = (LinearLayout) findViewById(R.id.bottom_sheet);
// init the bottom sheet behavior
bottomSheetBehavior = BottomSheetBehavior.from(llBottomSheet);
// change the state of the bottom sheet
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
// set callback for changes
bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
#Override
public void onStateChanged(#NonNull View bottomSheet, int newState) {
}
#Override
public void onSlide(#NonNull View bottomSheet, float slideOffset) {
}
});
((FloatingActionButton) findViewById(R.id.fab_directions)).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
try {
mMap.animateCamera(zoomingLocation());
} catch (Exception e) {
}
}
});
}
private void initMapFragment() {
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = Tools.configActivityMaps(googleMap);
MarkerOptions markerOptions = new MarkerOptions().position(new LatLng(37.7610237, -122.4217785));
mMap.addMarker(markerOptions);
mMap.moveCamera(zoomingLocation());
mMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
#Override
public boolean onMarkerClick(Marker marker) {
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
try {
mMap.animateCamera(zoomingLocation());
} catch (Exception e) {
}
return true;
}
});
}
});
}
private CameraUpdate zoomingLocation() {
return CameraUpdateFactory.newLatLngZoom(new LatLng(37.76496792, -122.42206407), 13);
}
}
this is the welcome activity
activity_welcome.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- search bar layout -->
<include
android:id="#+id/search_bar"
layout="#layout/include_card_view_search_bar" />
<!--bottom sheet container-->
<include layout="#layout/sheet_map" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab_directions"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/spacing_smlarge"
android:clickable="true"
android:tint="#android:color/white"
app:fabSize="normal"
app:layout_anchor="#id/bottom_sheet"
app:layout_anchorGravity="top|end"
app:rippleColor="#android:color/white"
android:src="#drawable/ic_pin_drop_black_24dp" />
</android.support.design.widget.CoordinatorLayout>```
this is the sheet_map
sheet_map.xml
```<?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"
android:id="#+id/bottom_sheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/transparent"
android:orientation="vertical"
app:behavior_hideable="true"
app:behavior_peekHeight="85dp"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
app:cardCornerRadius="1dp"
app:cardElevation="20dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<View
android:layout_width="30dp"
android:layout_height="5dp"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:background="#drawable/ic_keyboard_arrow_up_black_24dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/spacing_xxlarge"
android:layout_marginStart="#dimen/spacing_xxlarge"
android:gravity="center_vertical"
android:minHeight="50dp"
android:paddingEnd="#dimen/spacing_large"
android:paddingLeft="#dimen/spacing_large"
android:paddingRight="#dimen/spacing_large"
android:paddingStart="#dimen/spacing_large"
android:text="Dandelion Chocolate"
android:textAppearance="#style/TextAppearance.AppCompat.Headline" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="#dimen/spacing_large">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/spacing_middle"
android:layout_marginLeft="#dimen/spacing_xxlarge"
android:layout_marginStart="#dimen/spacing_xxlarge"
android:gravity="center_vertical"
android:orientation="horizontal">
<androidx.appcompat.widget.AppCompatRatingBar
style="#style/Yellow.Small.AppCompatRatingBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:numStars="5"
android:rating="3.5"
android:stepSize="0.5"
android:theme="#style/Yellow.Small.AppCompatRatingBar" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="4.7 (51)"
android:textAppearance="#style/TextAppearance.AppCompat.Medium" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginLeft="#dimen/spacing_xxlarge"
android:layout_marginStart="#dimen/spacing_xxlarge"
android:background="#color/grey_10" />
<TextView
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_marginLeft="#dimen/spacing_xxlarge"
android:layout_marginStart="#dimen/spacing_xxlarge"
android:gravity="center_vertical"
android:text="12 min away"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#color/colorPrimary" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginLeft="#dimen/spacing_xxlarge"
android:layout_marginStart="#dimen/spacing_xxlarge"
android:background="#color/grey_10" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/spacing_middle"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="?attr/actionBarSize"
android:background="#android:color/transparent"
android:tint="#color/grey_20"
android:src="#drawable/ic_location_on_black_24dp" />
<View
android:layout_width="#dimen/spacing_mxlarge"
android:layout_height="0dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="740 Valencia St, San Francisco, CA"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#color/grey_90" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="?attr/actionBarSize"
android:background="#android:color/transparent"
android:tint="#color/grey_20"
android:src="#drawable/ic_schedule_black_24dp" />
<View
android:layout_width="#dimen/spacing_mxlarge"
android:layout_height="0dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="(415) 349-0942"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#color/grey_90" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="?attr/actionBarSize"
android:background="#android:color/transparent"
android:tint="#color/grey_20"
android:src="#drawable/ic_schedule_black_24dp" />
<View
android:layout_width="#dimen/spacing_mxlarge"
android:layout_height="0dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="Wed, 10 AM - 9 PM"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#color/grey_90" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
the error i keep getting is
android.view.InflateException: Binary XML file line #2: Error inflating class android.support.design.widget.CoordinatorLayout
I have tried everything i can and looked it up several times but nothing seems to work

Change the layout tags to use androidx
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
</androidx.coordinatorlayout.widget.CoordinatorLayout>``

How to slide the main layout and force it to resize?

I want to create an text editor with options at the top (bold,..).
I also want to be able to hide those options; using the exact transition style shown in the picture below.
My problem is that the EditText that I use never has the intended behavious. (In the GIF below for exemple it does not resize after being moved).
I tried using animate (which is what is shown here on the picture).
I also tried with layout animation, combined with setVisibility(View.GONE) when the animation ends (its nearly perfect but for one frame between the two we can see what's happening).
I finally tried setting android:animateLayoutChanges="true". Which works great but I cannot animate the transition as I want.
I also tried combining the three in various ways, but never was successful.
Java:
public class MainActivity extends AppCompatActivity {
boolean optionVisible = true;
LinearLayout Main;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Main = findViewById(R.id.main);
}
public void show(View v) {
if (optionVisible) {
Main.animate().setDuration(300).translationYBy(-Options.getHeight());
} else {
Main.animate().setDuration(300).translationYBy(Options.getHeight());
}
optionVisible = !optionVisible;
}
}
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="#+id/options"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:fillAfter="true">
... Defining buttons and slider ...
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp">
... Defining Title EditText ...
</RelativeLayout>
<EditText
android:id="#+id/writter"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:gravity="top"
android:padding="0dp"
android:text="azertyuio"
android:textAlignment="gravity"
android:textColor="#color/text"
android:textSize="20sp"
tools:ignore="HardcodedText"
android:background="#null"
/>
</LinearLayout>

Well I finally managed to get it working properly. I still find the solution akward and would be glad to here another suggestion.
Anyway what I finally did was to use Animations (and not animate), and to have 2 main view basically being set GONE and VISIBLE at oppisite time depending on the presence of options or not.
Here is the code (I used an external class to synchronize the two EditText)
activity_main.xml :
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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">
<LinearLayout
android:id="#+id/main_with_opt"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:visibility="gone">
<LinearLayout
android:id="#+id/options"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:fillAfter="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<Button
style="#style/Widget.AppCompat.Button.Borderless"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/underline"/>
</FrameLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<Button
style="#style/Widget.AppCompat.Button.Borderless"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/italic"/>
</FrameLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<Button
style="#style/Widget.AppCompat.Button.Borderless"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/bold"/>
</FrameLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/size"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="aA"
android:paddingHorizontal="10dp"
android:paddingVertical="5dp"
tools:ignore="HardcodedText"
android:layout_alignParentStart="true"/>
<SeekBar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toEndOf="#id/size"
android:layout_toStartOf="#+id/size_int"/>
<TextView
android:id="#+id/size_int"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/text_size"
android:paddingHorizontal="10dp"
android:paddingVertical="5dp"
tools:ignore="HardcodedText"
android:layout_alignParentEnd="true"/>
</RelativeLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp">
<EditText
android:id="#+id/title_with_opt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lines="1"
android:text="#string/title"
android:maxLines="1"
android:textColor="#color/title"
android:layout_marginStart="10dp"
android:layout_toStartOf="#+id/arrow_with_opt"/>
<ImageButton
style="#style/Widget.AppCompat.Button.Borderless"
android:id="#+id/arrow_with_opt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:src="#drawable/arrow_less"
android:onClick="show"/>
</RelativeLayout>
<com.example.mynotes.SyncEditText
android:id="#+id/typer_with_opt"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:gravity="top"
android:padding="0dp"
android:textAlignment="gravity"
android:textColor="#color/text"
android:textSize="20sp"
android:background="#null"
/>
</LinearLayout>
<LinearLayout
android:id="#+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp">
<EditText
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:maxLines="1"
android:text="#string/title"
android:textColor="#color/title"
android:layout_marginStart="10dp"
android:layout_toStartOf="#+id/arrow"/>
<ImageButton
style="#style/Widget.AppCompat.Button.Borderless"
android:id="#+id/arrow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:src="#drawable/arrow_less"
android:onClick="show"/>
</RelativeLayout>
<com.example.mynotes.SyncEditText
android:id="#+id/typer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:gravity="top"
android:padding="0dp"
android:textAlignment="gravity"
android:textColor="#color/text"
android:textSize="20sp"
android:background="#null"
/>
</LinearLayout>
</FrameLayout>
Main Activity.java :
package com.example.mynotes;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.LayoutAnimationController;
import android.widget.LinearLayout;
public class MainActivity extends AppCompatActivity {
LinearLayout Options;
boolean optionVisible = false;
LinearLayout Main;
LinearLayout Main_with_opt;
LayoutAnimationController show_lessAnimation;
LayoutAnimationController show_moreAnimation;
com.example.mynotes.SyncEditText Typer;
com.example.mynotes.SyncEditText Typer_with_opt;
int mSelection;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Main_with_opt = findViewById(R.id.main_with_opt);
Options = findViewById(R.id.options);
Main = findViewById(R.id.main);
Typer = findViewById(R.id.typer);
Typer_with_opt = findViewById(R.id.typer_with_opt);
Typer.setDependencies(Typer_with_opt);
Typer_with_opt.setDependencies(Typer);
show_lessAnimation = AnimationUtils.loadLayoutAnimation(this, R.anim.show_less_layout);
show_moreAnimation = AnimationUtils.loadLayoutAnimation(this, R.anim.show_more_layout);
}
public void show(View v) {
if (optionVisible) {
Main_with_opt.setLayoutAnimationListener(show_lessAnimationListener);
Main_with_opt.setLayoutAnimation(show_lessAnimation);
Typer.requestFocus();
Typer.setSelection(Typer_with_opt.getSelectionStart());
Typer.scrollTo(Typer_with_opt.getScrollX(), Typer_with_opt.getScrollY());
Main_with_opt.startLayoutAnimation();
} else {
Main_with_opt.setLayoutAnimationListener(show_moreAnimationListener);
Main_with_opt.setLayoutAnimation(show_moreAnimation);
Main_with_opt.setVisibility(View.VISIBLE);
Typer_with_opt.requestFocus();
Typer_with_opt.setSelection(Typer.getSelectionStart());
Typer_with_opt.scrollTo(Typer.getScrollX(), Typer.getScrollY());
Main.setVisibility(View.GONE);
Main_with_opt.startLayoutAnimation();
}
optionVisible = !optionVisible;
}
Animation.AnimationListener show_lessAnimationListener = new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
Main.setVisibility(View.VISIBLE);
Main_with_opt.setVisibility(View.GONE);
}
#Override
public void onAnimationRepeat(Animation animation) {
}
};
Animation.AnimationListener show_moreAnimationListener = new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
}
#Override
public void onAnimationRepeat(Animation animation) {
}
};
}
And the cutom class :
SyncEditText.java :
package com.example.mynotes;
import android.content.Context;
import android.support.v7.widget.AppCompatEditText;
import android.text.Editable;
import android.text.InputType;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.util.Log;
public class SyncEditText extends AppCompatEditText implements TextWatcher {
private SyncEditText[] mDependencies;
private boolean shouldSync = true;
public SyncEditText(Context context) {
super(context);
}
public SyncEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SyncEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// This is to avoid text changed event is called multiple time per character because auto suggestion
setInputType(InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
addTextChangedListener(this);
}
private void addTextChangedListener(SyncEditText syncEditText) {
}
public void setDependencies(SyncEditText... dependencies) {
mDependencies = dependencies;
}
public void setText(CharSequence text, boolean syncDependencies) {
shouldSync = syncDependencies;
setText(text);
Log.d("Log", "Text sync: " + text);
}
#Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { }
#Override
public void afterTextChanged(Editable editable) { }
#Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
if (mDependencies == null)
return;
if (!shouldSync) {
// If this text is sync from other SyncEditText, ignore the change
shouldSync = true;
return;
}
Log.d("Log", "Text input: " + charSequence);
// Sync to all dependencies
for (SyncEditText syncEditText : mDependencies) {
syncEditText.setText(charSequence, false);
}
}
}

One activity with fragments and a navigation drawer

So, I want to build an app that has only one activity and will use multiple fragments. I have a log in activity, and after I make the log in I go to my maintactivity that has a fragment and a view-pager so I can swipe through some fragments(this fragments will be like a day of a calendar). My navigation drawer will be used to open other fragments, no the same as the ones mentioned before. My issues are, after I apply the view-pager, my button to open the drawer doesn't work and my fragments doesn't change when I click in the navigation drawer items, is keeps the fragment on top (I open it with the slide movement, since the button doesn't work). Here is my code:
MainActivity.java
package amsi.dei.estg.ipleiria.pt.projeto;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private static final int NUM_PAGES = 5;
private ViewPager mPager;
private PagerAdapter mPagerAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
mPager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);
setSupportActionBar(toolbar);
final DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
//since I have two onBackPressed, on for the drawer and other for my pageview, I left the one I thought would be more useful.
/*#Override
public void onBackPressed() {
if (mPager.getCurrentItem() == 0) {
// If the user is currently looking at the first step, allow the system to handle the
// Back button. This calls finish() on this activity and pops the back stack.
super.onBackPressed();
} else {
// Otherwise, select the previous step.
mPager.setCurrentItem(mPager.getCurrentItem() - 1);
}
}*/
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return new Dia();
}
#Override
public int getCount() {
return NUM_PAGES;
}
}
public boolean onNavigationItemSelected(MenuItem item){
int id = item.getItemId();
Fragment fragment = null;
if(id==R.id.nav_dia)
{
fragment = new Dia();
}
else if(id==R.id.nav_meusAlimentos)
{
fragment = new MeusAlimentos();
}
else if(id==R.id.nav_login)
{
Intent login = new Intent(this, LogIn.class);
startActivity(login);
}
if(fragment != null){
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.screen_area, fragment);
ft.commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:menu="#menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
content_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="amsi.dei.estg.ipleiria.pt.projeto.MainActivity"
tools:showIn="#layout/app_bar_main">
<FrameLayout
android:id="#+id/screen_area"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
Dia.java
package amsi.dei.estg.ipleiria.pt.projeto;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by nelsu on 24/11/2017.
*/
public class Dia extends Fragment {
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getActivity().setTitle("Day");
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
ViewGroup rootview = (ViewGroup) inflater.inflate(R.layout.activity_dia_content, container, false);
return rootview;
//return inflater.inflate(R.layout.activity_dia_content, null);
}
}
app_bar_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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="amsi.dei.estg.ipleiria.pt.projeto.MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main" />
</android.support.design.widget.CoordinatorLayout>
activity_dia_content.xml
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:fitsSystemWindows="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="70dp"
android:orientation="horizontal"
android:clickable="false"
android:focusable="false">
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#drawable/rectangle_dia_macros"
android:orientation="vertical">
<TextView
android:id="#+id/textView4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="gráficos e percentagem das macros"
android:textAlignment="center"
android:layout_gravity="center"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/textView8"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_gravity="center"
android:background="#drawable/rectangle_dia_refeicao"
android:text="Pequeno Almoço" />
<TextView
android:id="#+id/textView7"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_gravity="center"
android:background="#drawable/rectangle_dia_refeicao"
android:text="Café da manhã" />
<TextView
android:id="#+id/textView9"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_gravity="center"
android:background="#drawable/rectangle_dia_refeicao"
android:text="Almoço" />
<TextView
android:id="#+id/textView10"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_gravity="center"
android:background="#drawable/rectangle_dia_refeicao"
android:text="Lanche" />
<TextView
android:id="#+id/textView11"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_gravity="center"
android:background="#drawable/rectangle_dia_refeicao"
android:text="Jantar" />
<TextView
android:id="#+id/textView12"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_gravity="center"
android:background="#drawable/rectangle_dia_refeicao"
android:text="Lanche da noite" />
<Space
android:layout_width="match_parent"
android:layout_height="0dp" />
</LinearLayout>
</LinearLayout>
</ScrollView>
nav_header_main.xml
<?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"
android:layout_width="match_parent"
android:layout_height="#dimen/nav_header_height"
android:background="#drawable/side_nav_bar"
android:gravity="bottom"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:theme="#style/ThemeOverlay.AppCompat.Dark">
<ImageView
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="#dimen/nav_header_vertical_spacing"
app:srcCompat="#mipmap/ic_launcher_round" />
<TextView
android:id="#+id/label_nome_user"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/nav_header_vertical_spacing"
android:text="Android Studio"
android:textAppearance="#style/TextAppearance.AppCompat.Body1" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="android.studio#android.com" />
</LinearLayout>
activity_main_drawer.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">
<group android:checkableBehavior="single">
<item
android:id="#+id/nav_dia"
android:icon="#drawable/ic_menu_camera"
android:title="Dia" />
<item
android:id="#+id/nav_meusAlimentos"
android:icon="#drawable/ic_menu_gallery"
android:title="Meus Alimentos" />
<item
android:id="#+id/nav_login"
android:icon="#drawable/ic_menu_slideshow"
android:title="Login" />
<item
android:id="#+id/nav_manage"
android:icon="#drawable/ic_menu_manage"
android:title="Tools" />
<item
android:id="#+id/nav_settings"
android:icon="#drawable/ic_menu_manage"
android:title="Settings" />
<item
android:id="#+id/nav_about"
android:icon="#drawable/ic_menu_manage"
android:title="About" />
<item
android:id="#+id/nav_quit"
android:icon="#drawable/ic_menu_manage"
android:title="Quit" />
</group>
</menu>

You don't have to write your own code for this.
here is a nice library for your problem with all required things.
https://github.com/chrisbanes/cheesesquare

Can't resolve big spaces between GridView images

I am having an issue with setting up a GridView full of images.
When the images are displayed, they have huge gaps in between them. I have looked up and tried many solutions but still can't seem to find a fix.
What it looks like:
Here's my 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" >
<GridView
android:id="#+id/list"
style="#style/PhotoGridLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:adjustViewBounds="true"
android:columnWidth="#dimen/image_thumbnail_size"
android:horizontalSpacing="#dimen/image_thumbnail_spacing"
android:numColumns="3"
android:stretchMode="columnWidth"
android:verticalSpacing="#dimen/image_thumbnail_spacing" />
</RelativeLayout>
Main Activity:
import android.app.Activity;
import android.os.Bundle;
import android.widget.GridView;
public class MainActivity extends Activity {
GridView list;
LazyAdapter adapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
list = (GridView) findViewById(R.id.list);
adapter = new LazyAdapter(this, mStrings);
list.setAdapter(adapter);
}
#Override
public void onDestroy() {
list.setAdapter(null);
super.onDestroy();
}
private String[] mStrings = {
"www.URLs.jpg" };
}
LazyAdapter:
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
public class LazyAdapter extends BaseAdapter {
private Activity activity;
private String[] data;
private static LayoutInflater inflater = null;
public ImageLoader imageLoader;
public LazyAdapter(Activity a, String[] d) {
activity = a;
data = d;
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader = new ImageLoader(activity.getApplicationContext());
}
public int getCount() {
return data.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.item, null);
ImageView image = (ImageView) vi.findViewById(R.id.image);
imageLoader.DisplayImage(data[position], image);
return vi;
}
}
Item XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/image"
android:layout_width="50dip"
android:layout_height="50dip"
android:scaleType="centerCrop"
android:src="#drawable/img" />
</LinearLayout>

Try this
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/img" />
</LinearLayout>
<GridView android:id="#+id/PhoneImageGrid"
android:layout_width="match_parent" android:layout_height="match_parent"
android:numColumns="auto_fit" android:verticalSpacing="10dp"
android:horizontalSpacing="10dp" android:columnWidth="90dp"
android:stretchMode="columnWidth" android:gravity="center"
/>

<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/grid_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginRight="15dp"
android:layout_marginTop="25dp"
android:cacheColorHint="#android:color/transparent"
android:columnWidth="80dp"
android:gravity="center"
android:numColumns="3"
android:stackFromBottom="false"
android:stretchMode="none" >
OR
android:stretchMode="spacingWidthUniform"
OR
in adapter try this
<ImageView
android:id="#+id/galler_imageview"
android:layout_width="80dp"
android:layout_height="80dp"
android:contentDescription="#string/image" />

Try this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/img" />
</LinearLayout>
<GridView android:id="#+id/PhoneImageGrid"
android:layout_width="match_parent" android:layout_height="match_parent"
android:numColumns="auto_fit" android:verticalSpacing="10dp"
android:horizontalSpacing="10dp" android:columnWidth="90dp"
android:stretchMode="columnWidth" android:gravity="center"
/>
item.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="#drawable/img" />
</LinearLayout>