I am making an app an tried using setContentView in Android Studio when i used it the layout changed but the app is still using the first java it is not changing the code is given bellow
i tried changing the file up i also tried creating a new empty file but it didnt work
:-
import androidx.appcompat.app.AppCompatActivity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.widget.ProgressBar;
public class MainActivity extends AppCompatActivity {
private Handler mHandler = new Handler();
private int progress = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ProgressBar progressBar = findViewById(R.id.progressBar);
new Thread(new Runnable() {
#Override
public void run() {
while(progress < 100) {
progress++;
android.os.SystemClock.sleep(25);
mHandler.post(new Runnable() {
#Override
public void run() {
progressBar.setProgress(progress);
}
});
}
mHandler.post(new Runnable() {
#Override
public void run() {
setContentView(R.layout.activity_on_boarding);
}
});
}
}).start();
}
}
xml:-
<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">
<ImageView
android:id="#+id/imageView"
android:layout_width="187dp"
android:layout_height="141dp"
android:contentDescription="#string/logo"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.137"
app:srcCompat="#drawable/logo" />
<TextView
android:id="#+id/title"
android:layout_width="307dp"
android:layout_height="210dp"
android:text="#string/title"
android:textColor="#000000"
android:textSize="40sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.52"
tools:fontFamily="casual"
/>
<ProgressBar
android:id="#+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="300dp"
android:layout_height="32dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.795" />
</androidx.constraintlayout.widget.ConstraintLayout>
second java:-
package com.thebetterside.wallex;
import androidx.appcompat.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.os.Bundle;
public class OnBoarding extends AppCompatActivity {
private Button go = findViewById(R.id.go);
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_on_boarding);
go.setOnClickListener(
new Button.OnClickListener(){
#Override
public void onClick(View v) {
setContentView(R.layout.activity_name);
}
}
);
}
}
2nd xml:-
<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=".OnBoarding">
<Button
android:id="#+id/go"
android:layout_width="351dp"
android:layout_height="44dp"
android:background="#drawable/rounded_corner_peach"
android:text="#string/go"
android:textColor="#000046"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.504"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.945" />
</androidx.constraintlayout.widget.ConstraintLayout>
You want to do startActivity(this, OnBoarding.class) instead of calling the setContentView()
setContentView() sets the layout for the current activity, it does not start the second one.
And judging from the code you posted, you want to transfer control to your other java file (OnBoarding.java) and that must be done by starting that activity explicitly.
EDIT: in your case, it'll most probably be MainActivity.this.startActivity(MainActivity.this, OnBoarding.class) because just this will point to the thread, instead of the enclosing Context/Activity
Related
Hi I've been trying to make a pop up window which presents a trackable seekbar as a part of a school project, both parts of the code work alone but when put together the seekbar progress is not tracked (you can move the seekbar but the number won't change), Help would be very appreciated!
MainActivity.java
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void onButtonShowPopupWindowClick(View view) {
// inflate the layout of the popup window
LayoutInflater inflater = (LayoutInflater)
getSystemService(LAYOUT_INFLATER_SERVICE);
View popupView = inflater.inflate(R.layout.activity_pop_up, null);
// create the popup window
int width = LinearLayout.LayoutParams.MATCH_PARENT;
int height = 500;
boolean focusable = true; // lets taps outside the popup also dismiss it
final PopupWindow popupWindow = new PopupWindow(popupView, width, height, focusable);
// show the popup window
// which view you pass in doesn't matter, it is only used for the window token
popupWindow.showAtLocation(view, Gravity.BOTTOM, 0, 0);
// dismiss the popup window when touched
popupView.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
popupWindow.dismiss();
return true;
}
});
}
}
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/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onButtonShowPopupWindowClick"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.368" />
</androidx.constraintlayout.widget.ConstraintLayout>
popUp.java
package com.example.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ProgressBar;
import android.widget.SeekBar;
import android.widget.TextView;
public class popUp extends AppCompatActivity {
private TextView textView;
private SeekBar seekBar;
private ProgressBar progressBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.textView);
seekBar = (SeekBar) findViewById(R.id.seekBar);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
progressBar.setProgress(progress);
textView.setText("" + progress + "$");
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
}
}
activity_pop_up.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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="right">
<Button
android:id="#+id/bt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="confirm"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.06"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.01999998" />
<SeekBar
android:id="#+id/seekBar"
android:layout_width="250dp"
android:layout_height="55dp"
android:progress="0"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.78"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.01999998" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/textView3"
android:layout_width="154dp"
android:layout_height="45dp"
android:gravity="center"
android:text="amount:"
android:textSize="30dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.110000014" />
<TextView
android:id="#+id/textView"
android:layout_width="214dp"
android:layout_height="44dp"
android:text="0"
android:textSize="30dp"
android:gravity="center"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.75"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.110000014" />
</LinearLayout>
<ProgressBar
android:id="#+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#id/seekBar"
android:layout_alignParentStart="true"
android:layout_marginBottom="21dp" />
</LinearLayout>
I have an activity with multiple steps, each step being a fragment transaction with an edittext box, with a next/back button to navigate and initiate sending the users input data. I want to be able to move throughout the fragments with the text in each box staying static. I can move back no problem, but as soon as I click next the next fragment is recreated and everything is lost.
I tried:
using a dummy view in onCreateView
refetching the string in onCreate
setRetainInstance(true); in the constructor
Using a viewpager has other complications regarding receiving data which I was not able to solve despite many here attempting to help, so I have no choice but to use fragment transactions in my app.
main/FormActivity.java
package com.loopbreakr.formproject;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
public class FormActivity extends AppCompatActivity implements PageOne.ExitFormInteractionListener{
//DECLARE COMPONENTS
private FrameLayout fragmentContainer;
private Button backToMain;
private Button startForm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//FIND COMPONENTS IN XML
setContentView(R.layout.activity_form);
fragmentContainer = findViewById(R.id.frame_layout);
backToMain = findViewById(R.id.return_button);
startForm = findViewById(R.id.start_button);
//SET LISTENERS/INTENTS FOR BUTTONS
backToMain.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
startForm.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
openFragments();
}
});
}
private void openFragments() {
PageOne fragment1 = PageOne.newInstance();
FragmentManager fragmentManager =getSupportFragmentManager();
FragmentTransaction beginTransaction = fragmentManager.beginTransaction();
beginTransaction.addToBackStack(null);
beginTransaction.add(R.id.frame_layout,fragment1,"PageOne_tag");
beginTransaction.commit();
}
#Override
public void onFragmentInteraction(String answerOneText) {
}
}
One of my fragments PageOne.java
package com.loopbreakr.formproject;
import android.content.Context;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
public class PageOne extends Fragment {
View restored;
private static final String SAVED = "text";
private String savedText;
private String answerOneString;
private EditText answerOne;
private ExitFormInteractionListener mListener;
public PageOne() {
setRetainInstance(true);
}
public static PageOne newInstance() {
PageOne fragment = new PageOne();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
savedText = getArguments().getString(SAVED);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
if(restored == null){
restored = inflater.inflate(R.layout.fragment_page_one, container, false);
}
answerOne = restored.findViewById(R.id.answer_one);
Button exitForm = restored.findViewById(R.id.exit_form);
Button goNextTwo = restored.findViewById(R.id.gonext_two);
exitForm.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
returnToDesc();
}
});
goNextTwo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
answerOneString = answerOne.getText().toString();
sendToTwo(answerOneString);
openSecondFragment();
}
});
return restored;
}
private void sendToTwo(String answerOneText) {
if(mListener != null){
mListener.onFragmentInteraction(answerOneText);
}
}
private void openSecondFragment() {
PageTwo fragment2 = PageTwo.newInstance(answerOneString);
FragmentTransaction fragTransition = getFragmentManager().beginTransaction();
fragTransition.replace(R.id.frame_layout, fragment2,"PageTwo_TAG");
fragTransition.addToBackStack(null);
fragTransition.commit();
}
private void returnToDesc(){
FragmentManager fragTransBack = getFragmentManager();
fragTransBack.popBackStack();
}
public interface ExitFormInteractionListener{
void onFragmentInteraction(String answerOneText);
}
#Override
public void onAttach(#NonNull Context context) {
super.onAttach(context);
if (context instanceof ExitFormInteractionListener) {
mListener = (ExitFormInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
}
activity_form.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=".FormActivity">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/linearLayout"
android:layout_width="0dp"
android:layout_height="32dp"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
</LinearLayout>
<TextView
android:id="#+id/activity_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="32dp"
android:text="#string/activity_title"
android:textSize="32sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:stateListAnimator="#null"/>
<Button
android:id="#+id/return_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginBottom="8dp"
android:text="#string/return_text"
app:layout_constraintBottom_toTopOf="#+id/linearLayout"
app:layout_constraintStart_toStartOf="parent"
android:stateListAnimator="#null"/>
<Button
android:id="#+id/start_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:text="#string/start_text"
app:layout_constraintBottom_toTopOf="#+id/linearLayout"
app:layout_constraintEnd_toEndOf="parent"
android:stateListAnimator="#null"/>
<FrameLayout
android:id="#+id/frame_layout"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="#+id/linearLayout"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</RelativeLayout>
activity_page_one.xml
<?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:clickable="true"
tools:context=".PageOne"
android:focusable="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_height="match_parent"
android:layout_width="match_parent">
<TextView
android:id="#+id/activity_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="32dp"
android:text="#string/activity_title"
android:textSize="32sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<Button
android:id="#+id/exit_form"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginBottom="8dp"
android:text="#string/back"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:stateListAnimator="#null"/>
<Button
android:id="#+id/gonext_two"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:text="#string/next"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:stateListAnimator="#null"/>
<EditText
android:id="#+id/answer_one"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:gravity="start|top"
android:hint="#string/answer_one_hint"
android:inputType="textMultiLine|textAutoCorrect"
android:maxLines="4"
android:minLines="4"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/activity_name"
android:stateListAnimator="#null"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</RelativeLayout>
Thanks.
I keep getting this error whenever I run the application, which crashes every time I interact with it. The problem first occurred after I moved the original TextView around and altered the color and Font Style. I'm not sure why it's happening now, but it didn't happen before. I'm not exactly sure why this error is occurring either. Please help.
Below is the error message:
E/TypefaceCompatApi26Impl: Unable to collect necessary methods for class java.lang.NoSuchMethodException
java.lang.NoSuchMethodException: android.graphics.FontFamily.<init> []
This is the MainActivity class:
package com.example.exploreroptimizer;
import android.app.ActivityManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
final Cleaner cleaner = new Cleaner();
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button cleanButton = findViewById(R.id.cleanButton);
final ProgressBar cleanBar = findViewById(R.id.progressBar);
final TextView progressUpdate = findViewById(R.id.progressUpdate);
System.out.println("success");
cleanButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Thread thread = new Thread() {
#Override
public void run() {
try {
final ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
activityManager.getMemoryInfo(mi);
final double a = mi.availMem / 0x100000L;
cleanBar.setProgress(20);
progressUpdate.setText("Cleaning Ram!");
Thread.sleep(1500);
cleanBar.setProgress(40);
progressUpdate.setText("Closing Unused Apps!");
Thread.sleep(1500);
cleanBar.setProgress(100);
progressUpdate.setText("Clearing Cache!");
Thread.sleep(1500);
Cleaner.deleteCache(getApplicationContext());
cleaner.killBackgroundProcesses(getApplicationContext(), getApplicationContext().getPackageManager());
cleaner.clearRAM();
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(), "I have closed " + Cleaner.i + " apps, ", Toast.LENGTH_SHORT).show();
}
});
} catch (InterruptedException e) {
}
}
};
thread.start();
}
});
}
}
And this is the xml file code for the UI:
<?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/cleanButton"
android:layout_width="172dp"
android:layout_height="166dp"
android:background="#drawable/cleanbutton"
android:fontFamily="sans-serif"
android:text="Clean"
android:textColor="#FFFFFF"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ProgressBar
android:id="#+id/progressBar"
style="?android:attr/progressBarStyle"
android:layout_width="312dp"
android:layout_height="382dp"
android:indeterminate="false"
android:max="0"
android:progress="0"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/progressUpdate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="cursive"
android:text="TextView"
android:textColor="#0DB344"
android:textSize="18sp"
android:textStyle="normal|bold"
android:typeface="sans"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/progressBar" />
</androidx.constraintlayout.widget.ConstraintLayout>
I have a layout with 3 buttons. I worked on the second and the third button. When i press the second button the layout changes but when i press the third button the layout changes but its an empty layout.
This is the layout that should show up when i press the button:
<android.support.constraint.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="com.myappcompany.rob.basicphrases.Premium"
>
<TextView
android:id="#+id/textView3"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginBottom="56dp"
android:layout_marginTop="20dp"
android:fontFamily="serif"
android:text="PREMIUM SOUNDS"
android:textAlignment="center"
android:textColor="#android:color/black"
android:textSize="36sp"
android:textStyle="bold|italic"
app:layout_constraintBottom_toTopOf="#+id/gridLayout"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.v7.widget.GridLayout
android:id="#+id/gridLayout"
android:layout_width="413dp"
android:layout_height="614dp"
android:layout_marginBottom="1dp"
android:layout_marginTop="56dp"
app:columnCount="2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView3"
app:rowCount="4">
<Button
android:id="#+id/button"
android:onClick="playPhrase"
android:tag="baiatuvreilepra"
android:text="Baiatu vrei lepra?"
android:textAllCaps="false"
app:layout_columnWeight="1"
app:layout_gravity="fill"
app:layout_rowWeight="1" />
<Button
android:id="#+id/button1"
android:onClick="playPhrase"
android:tag="cristelnitapopii"
android:text="Baiat vrei lepra?"
android:textAllCaps="false"
app:layout_columnWeight="1"
app:layout_gravity="fill"
app:layout_rowWeight="1" />
<Button
android:id="#+id/button2"
android:onClick="playPhrase"
android:tag="tagani"
android:text="Baiatuu vrei lepra?"
android:textAllCaps="false"
app:layout_columnWeight="1"
app:layout_gravity="fill"
app:layout_rowWeight="1" />
<Button
android:id="#+id/button3"
android:onClick="playPhrase"
android:tag="tietisemaiscoalama"
android:text="Baia vrei lepra?"
android:textAllCaps="false"
app:layout_columnWeight="1"
app:layout_gravity="fill"
app:layout_rowWeight="1" />
</android.support.v7.widget.GridLayout>
</android.support.constraint.ConstraintLayout>
but nothing show up , only an empty layout
This is the code of the layout that shows up emty:
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class Premium extends AppCompatActivity {
public void playPhrase(View view){
Button buttonPressed = (Button) view;
Log.i("info", buttonPressed.getTag().toString());
MediaPlayer mediaPlayer = MediaPlayer.create(this, getResources().getIdentifier(buttonPressed.getTag().toString(), "raw", getPackageName()));
mediaPlayer.start();
}
}
And this is the code of the main file with the intent:
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
openActivity2();
}
public void openActivity2() {
Button button = (Button) findViewById(R.id.oldSchool);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(MainActivity.this, Premium.class));
}
});
}
}
You are missing something important here! You are missing onCreate and setContentView.
public class Premium extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_premium_YOUR_LAYOUT_NAME);
}
public void playPhrase(View view){
Button buttonPressed = (Button) view;
Log.i("info", buttonPressed.getTag().toString());
MediaPlayer mediaPlayer = MediaPlayer.create(this, getResources().getIdentifier(buttonPressed.getTag().toString(), "raw", getPackageName()));
mediaPlayer.start();
}
}
Hope this helps. Feel free to ask for clarifications...
I recently learned about Fragments in Android and was building a notepad application to practice them.
Idea: The idea behind the app is simple. I press the button to add a new note. A CardView Viewgroup turns visible. The fragment will be housed within this CardView.
Problem: When I press the button to add a new note, the fragment does not pop up.
MainActivity.java
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import androidx.cardview.widget.CardView;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import java.util.Objects;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private CardView fragmentCardView;
private Button newNoteButton;
private FragmentManager fragmentManager = getSupportFragmentManager();
private FragmentTransaction fragmentTransaction;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setActionBar();
newNoteButton = findViewById(R.id.new_note_button);
fragmentCardView = findViewById(R.id.fragment_cardView);
}
void setActionBar(){
Objects.requireNonNull(getSupportActionBar()).setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setDisplayShowCustomEnabled(true);
getSupportActionBar().setCustomView(R.layout.layout_custom_action_bar);
}
void showCreateNoteFragment(){
CreateNoteFragment createNoteFragment = CreateNoteFragment.newInstance();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.fragment_cardView, createNoteFragment);
fragmentTransaction.commit();
fragmentCardView.setVisibility(View.VISIBLE);
}
#Override
public void onClick(View v) {
if (v == newNoteButton)
showCreateNoteFragment();
}
}
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"
android:background="#F2F2F2"
tools:context=".MainActivity">
<ListView
android:id="#+id/notes_listView"
android:layout_width="match_parent"
android:layout_height="667dp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"/>
<Button
android:id="#+id/new_note_button"
android:layout_width="350dp"
android:layout_height="50dp"
android:layout_marginTop="27dp"
android:fontFamily="#font/nunito_bold"
android:text="#string/new_note_button_string"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/notes_listView"/>
<androidx.cardview.widget.CardView
android:id="#+id/fragment_cardView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="100dp"
android:layout_marginBottom="100dp"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:visibility="invisible"/>
</androidx.constraintlayout.widget.ConstraintLayout>
CreateNoteFragment.java
package com.example.notepadapplication;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
public class CreateNoteFragment extends Fragment implements View.OnClickListener {
private EditText inputEditText;
public CreateNoteFragment() {
// Required empty public constructor
}
static CreateNoteFragment newInstance(){
return new CreateNoteFragment();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_create_note, container, false);
inputEditText = rootView.findViewById(R.id.input_editText);
Button saveButton = rootView.findViewById(R.id.save_button);
saveButton.setOnClickListener(this);
return rootView;
}
#Override
public void onClick(View v) {
String saveButtonText = inputEditText.getText().toString();
}
}
fragment_create_note.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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:layout_marginTop="100dp"
android:layout_marginBottom="100dp"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:background="#F2F2F2"
tools:context=".CreateNoteFragment">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/header_textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:text="#string/display_fragment_header_string"
android:layout_marginTop="10dp"
android:textAlignment="center"
android:textSize="20sp"
android:fontFamily="#font/nunito_bold"/>
<View
android:id="#+id/divider_view"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="5dp"
android:layout_marginStart="15dp"
android:layout_marginEnd="15dp"
android:layout_below="#id/header_textView"
android:background="#000000" />
<EditText
android:id="#+id/input_editText"
android:layout_width="match_parent"
android:layout_height="475dp"
android:layout_below="#id/divider_view"
android:layout_alignParentStart="true"
android:layout_alignParentEnd="true"
android:layout_marginTop="20dp"
android:layout_marginStart="5dp"
android:layout_marginEnd="5dp"
android:padding="10dp"
android:inputType="textMultiLine"
android:gravity="top"
android:background="#FFFFFF"
tools:ignore="Autofill,LabelFor,TextFields" />
<Button
android:id="#+id/save_button"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="10dp"
android:text="#string/save_button_string"
android:fontFamily="#font/nunito_bold"/>
</RelativeLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
Could anyone check why the fragment isn't popping up? Thanks for the help, guys.
P.S.: I think that the application might become a little bloated because of all the ViewGroups that I'm using. If you guys have a better way to design this, by all means, I would love any input.
When I press the button to add a new note, the fragment does not pop up.
This is expected since your button doesn't know what to do when pressed.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setActionBar();
newNoteButton = findViewById(R.id.new_note_button);
// Button will call activity's onClick whenever it's clicked
newNoteButton.setOnClickListener(this);
fragmentCardView = findViewById(R.id.fragment_cardView);
}