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ProgressBar without AsyncTask

I'd like to show the progress bar, generate the computation, then after I do that I'd like the progressbar to disappear and I want to set the textview to the result of my generate result. Yet when I do the below, the progress bar never displays, yet the textview updates appropriately. I originally wanted to do this using AsyncTask but since thats been deprecated I wanted to try a modern method but I'm afraid I can't get it to work. Can anyone see what is wrong?
genResult.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
new Thread(new Runnable() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run() {
// do onPreExecute stuff
pb.setVisibility(View.VISIBLE);
}
});
// do your stuff
boolean res = exp.genResult();
long startTime = System.nanoTime();
while(System.nanoTime()-startTime<50000){
}
result.outcomes.add(res);
runOnUiThread(new Runnable() {
public void run() {
// do onPostExecute stuff
pb.setVisibility(View.INVISIBLE);
lastRes.setText(Boolean.toString(res));
}
});
}
}).start();
}
});
Below is the XML file
<?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/gen_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="generate result"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.941" />
<TextView
android:id="#+id/title_bin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Title"
app:layout_constraintBottom_toTopOf="#+id/gen_button"
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="0.153" />
<Button
android:id="#+id/detail_bin_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="View Details"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.941"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.005" />
<Button
android:id="#+id/backbutton_bin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:text="go back"
app:layout_constraintEnd_toStartOf="#+id/detail_bin_button"
app:layout_constraintHorizontal_bias="0.105"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/lastresultbin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="36dp"
android:layout_marginLeft="36dp"
android:text="lastresult"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/backbutton_bin"
app:layout_constraintVertical_bias="0.313" />
<TextView
android:id="#+id/probabilityViewer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="208dp"
android:text="Probability"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.65"
app:layout_constraintStart_toEndOf="#+id/lastresultbin"
app:layout_constraintTop_toBottomOf="#+id/detail_bin_button" />
<TextView
android:id="#+id/plaintext_lastres_bin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:text="Last Result"
app:layout_constraintBottom_toTopOf="#+id/lastresultbin"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.105"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/backbutton_bin"
app:layout_constraintVertical_bias="1.0" />
<TextView
android:id="#+id/plaintext_prob"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="164dp"
android:layout_marginEnd="44dp"
android:layout_marginRight="44dp"
android:text="Probability of Success"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#+id/detail_bin_button" />
<ProgressBar
android:id="#+id/progressBar1"
android:layout_width="100dp"
android:layout_height="20dp"
android:layout_centerInParent="true"
android:layout_marginTop="148dp"
android:indeterminate="true"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.333"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
</androidx.constraintlayout.widget.ConstraintLayout>

The issue is that System.nanoTime() used in the while loop was too quick to complete. When we switch to using System.currentTimeInMillis() we can notice a difference in the delay and thus the spinner shows and hides as expected.

EditText getText not working in Button Click

I have two EditText in MyActivity. Here I have provided UI XML.
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="#+id/button_insta"
android:layout_width="135dp"
android:layout_height="0dp"
android:layout_marginBottom="33dp"
android:text="Download"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<EditText
android:id="#+id/editUrli"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginTop="64dp"
android:layout_marginBottom="18dp"
android:ems="10"
android:inputType="textPersonName"
android:text=""
android:textColor="#0C0C0C"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="#+id/textView2"
android:layout_width="177dp"
android:layout_height="39dp"
android:layout_marginEnd="81dp"
android:layout_marginRight="81dp"
android:text="Paste Instagram video link to download "
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="#+id/imageView3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/imageView3"
app:layout_constraintTop_toTopOf="#+id/imageView3" />
<ImageView
android:id="#+id/imageView3"
android:layout_width="78dp"
android:layout_height="43dp"
android:layout_marginStart="41dp"
android:layout_marginLeft="41dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="18dp"
android:layout_marginRight="18dp"
android:src="#drawable/insta"
app:layout_constraintEnd_toStartOf="#+id/textView2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.card.MaterialCardView>
<com.google.android.material.card.MaterialCardView
android:id="#+id/card"
android:layout_width="0dp"
android:layout_height="200dp"
android:layout_margin="8dp"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="MissingConstraints">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:id="#+id/editUrl"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginTop="64dp"
android:layout_marginBottom="18dp"
android:ems="10"
android:inputType="textPersonName"
android:text=""
android:textColor="#0C0C0C"
app:layout_constraintBottom_toTopOf="#+id/button_download"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/button_download"
android:layout_width="135dp"
android:layout_height="0dp"
android:layout_marginBottom="33dp"
android:text="Download"
android:onClick="onClick"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<ImageView
android:id="#+id/fblogo"
android:layout_width="95dp"
android:layout_height="39dp"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="13dp"
android:layout_marginEnd="18dp"
android:layout_marginRight="18dp"
android:layout_marginBottom="13dp"
android:contentDescription="TODO"
android:src="#drawable/fb"
app:layout_constraintBottom_toTopOf="#+id/editUrl"
app:layout_constraintEnd_toStartOf="#+id/textView"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="#+id/textView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="75dp"
android:layout_marginRight="75dp"
android:layout_marginBottom="84dp"
android:text="Paste FB video link to download"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="#+id/button_download"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/fblogo"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.card.MaterialCardView>
In my Activity java code has this button click code
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_download);
inputURl = findViewById(R.id.editUrl);
editUrlinsta = findViewById(R.id.editUrli);
BtnDownload = (Button) findViewById(R.id.button_download);
downloadinsta = (Button) findViewById(R.id.button_insta);
BtnDownload.setOnClickListener(this);
downloadinsta.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.button_download:
try{
final FacebookDownloader downloaders = new FacebookDownloader(Download.this,inputURl.getText().toString());
downloaders.DownloadVideo();
inputURl.getText().clear();
} catch(Exception e) {}
break;
case R.id.button_insta:
final InstaDownloader downloaderInsta = new InstaDownloader(Download.this,editUrlinsta.getText().toString());
downloaderInsta.DownloadVideo();
editUrlinsta.getText().clear();
break;
default:
break;
}
}
The problem is The first button which I have named button_download is working as expected. But the second button button_insta not working as expected. what I want to do, is When one of the buttons clicks, getting data from EditText. The button_download works fine. the button_insta is not working fine.
I couldn't get value from editUrli when the button click. But same code works for button_download and editUrl

Try to separate those button click function like so :
BtnDownload.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try{
final FacebookDownloader downloaders = new FacebookDownloader(Download.this,inputURl.getText().toString());
downloaders.DownloadVideo();
inputURl.getText().clear();
} catch(Exception e) {}
}
});
downloadinsta.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final InstaDownloader downloaderInsta = new InstaDownloader(Download.this,editUrlinsta.getText().toString());
downloaderInsta.DownloadVideo();
editUrlinsta.getText().clear();
}
});

Android TextView OnClick-Event doesn't work

I have to program a TicTacToe app:
This is the code of the activity_main.xml:
(It's a simple 3x3 field of TextViews on a black background)
<?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="#000000"
android:screenOrientation="portrait"
tools:context=".MainActivity">
<androidx.gridlayout.widget.GridLayout
android:layout_width="294dp"
android:layout_height="286dp"
android:background="#000000"
app:layout_constraintBottom_toTopOf="#+id/button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView">
<TextView
android:id="#+id/tictactoe_center_left"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:editable="false"
android:ems="10"
android:enabled="false"
android:onClick="click_center_left"
android:text="#string/game_playersymbol_x"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="70sp"
android:textStyle="bold"
app:layout_column="0"
app:layout_row="1" />
<TextView
android:id="#+id/tictactoe_center_right"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:editable="false"
android:ems="10"
android:enabled="false"
android:onClick="click_center_right"
android:text="#string/game_playersymbol_x"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="70sp"
android:textStyle="bold"
app:layout_column="2"
app:layout_row="1" />
<TextView
android:id="#+id/tictactoe_center_center"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:editable="false"
android:ems="10"
android:enabled="false"
android:onClick="click_center_center"
android:text="#string/game_playersymbol_x"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="70sp"
android:textStyle="bold"
app:layout_column="1"
app:layout_row="1" />
<TextView
android:id="#+id/tictactoe_top_left"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:clickable="true"
android:ems="10"
android:enabled="false"
android:focusable="true"
android:onClick="click_top_left"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="70sp"
android:textStyle="bold"
app:layout_column="0"
app:layout_row="0"
tools:text="#string/game_playersymbol_x" />
<TextView
android:id="#+id/tictactoe_top_center"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:editable="false"
android:ems="10"
android:enabled="false"
android:onClick="click_top_center"
android:text="#string/game_playersymbol_x"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="70sp"
android:textStyle="bold" />
<TextView
android:id="#+id/tictactoe_top_right"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:editable="false"
android:ems="10"
android:enabled="false"
android:onClick="click_top_right"
android:text="#string/game_playersymbol_x"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="70sp"
android:textStyle="bold" />
<TextView
android:id="#+id/tictactoe_bottom_left"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:editable="false"
android:ems="10"
android:enabled="false"
android:onClick="click_bottom_left"
android:text="#string/game_playersymbol_x"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="70sp"
android:textStyle="bold"
app:layout_column="0"
app:layout_row="2" />
<TextView
android:id="#+id/tictactoe_bottom_right"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:editable="false"
android:ems="10"
android:enabled="false"
android:onClick="click_bottom_right"
android:text="#string/game_playersymbol_x"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="70sp"
android:textStyle="bold"
app:layout_column="2"
app:layout_row="2" />
<TextView
android:id="#+id/tictactoe_bottom_center"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:editable="false"
android:ems="10"
android:enabled="false"
android:onClick="click_bottom_center"
android:text="#string/game_playersymbol_x"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="70sp"
android:textStyle="bold"
app:layout_column="1"
app:layout_row="2" />
</androidx.gridlayout.widget.GridLayout>
<Button
android:id="#+id/button"
android:layout_width="213dp"
android:layout_height="61dp"
android:layout_marginBottom="56dp"
android:background="#drawable/roundbutton"
android:text="#string/menu_play_singleplayer"
android:textColor="#FFFFFF"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/app_name"
android:textColor="#979797"
android:textSize="50sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.066" />
</androidx.constraintlayout.widget.ConstraintLayout>
This is the code of the MainActivity.java:
package com.example.tictactoe;
import androidx.appcompat.app.AppCompatActivity;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private int counter = 1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getSupportActionBar().hide();
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
public void click_top_left(View v) { click_action((TextView)findViewById(R.id.tictactoe_top_left)); }
public void click_top_center(View v) { click_action((TextView)findViewById(R.id.tictactoe_top_center)); }
public void click_top_right(View v) { click_action((TextView)findViewById(R.id.tictactoe_top_right)); }
public void click_center_left(View v) { click_action((TextView)findViewById(R.id.tictactoe_center_left)); }
public void click_center_center(View v) { click_action((TextView)findViewById(R.id.tictactoe_center_center)); }
public void click_center_right(View v) { click_action((TextView)findViewById(R.id.tictactoe_center_right)); }
public void click_bottom_left(View v) { click_action((TextView)findViewById(R.id.tictactoe_bottom_left)); }
public void click_bottom_center(View v) { click_action((TextView)findViewById(R.id.tictactoe_bottom_center)); }
public void click_bottom_right(View v) { click_action((TextView)findViewById(R.id.tictactoe_bottom_right)); }
public void click_action(TextView tv) {
if ((counter%2)==0)
tv.setText("O");
else
tv.setText("X");
counter++;
}
}
I've set the android:clickable to true.
I've set a onclick listener.
I simply cannot find my mistake...
I would appreciate any kind of help!

You have set to all the TextViews:
android:enabled="false"
Why?
Change it to:
android:enabled="true"

first give an id to your textview then Define a Sample like Textview textview find it in java and use setOnClickListener() in onCreate method just like below.It will definitely works.
textveiw.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) { }});

com.rengwuxian.materialedittext.MaterialEditText cannot be cast to android.view.ViewGroup

My app is always crashing because of this error. It says:
com.rengwuxian.materialedittext.MaterialEditText cannot be cast to android.view.ViewGroup.
I'm a beginner who's looking for some code on YouTube, but I can't figure it out.
<ImageView
android:id="#+id/imageView2"
android:layout_width="243dp"
android:layout_height="166dp"
android:layout_marginStart="8dp"
android:layout_marginTop="60dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/logo" />
<TextView
android:id="#+id/textView"
android:layout_width="102dp"
android:layout_height="24dp"
android:layout_marginStart="8dp"
android:layout_marginTop="44dp"
android:layout_marginEnd="8dp"
android:text="USERNAME"
android:textSize="18sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.259"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/imageView2" />
<com.rengwuxian.materialedittext.MaterialEditText
android:id="#+id/usernameTIL"
android:layout_width="251dp"
android:layout_height="46dp"
android:layout_marginStart="8dp"
android:layout_marginTop="12dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.527"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView">
<com.rengwuxian.materialedittext.MaterialEditText
android:layout_width="268dp"
android:layout_height="36dp"
android:hint="username" />
</com.rengwuxian.materialedittext.MaterialEditText>
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:text="PASSWORD"
android:textSize="18sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.255"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/usernameTIL"
app:layout_constraintVertical_bias="0.018" />
<com.rengwuxian.materialedittext.MaterialEditText
android:id="#+id/passwordTIL2"
android:layout_width="253dp"
android:layout_height="47dp"
android:layout_marginStart="8dp"
android:layout_marginTop="12dp"
android:layout_marginEnd="8dp"
android:ems="10"
android:hint="password"
android:inputType="textPassword"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.535"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView2" />
<CheckBox
android:id="#+id/rememberCB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="68dp"
android:text="Remember Me?"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/passwordTIL2" />
<Button
android:id="#+id/signInBTN"
android:layout_width="145dp"
android:layout_height="49dp"
android:layout_marginTop="28dp"
android:background="#color/signInBTN"
android:text="SIGN IN"
android:textColor="#android:color/white"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/rememberCB" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Dont't have an Account?"
android:textColor="#android:color/black"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.323"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/signInBTN" />
My Java:
public class sign_in extends AppCompatActivity {
EditText usernameTIL, passwordTIL;
Button signInBTN;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sign_in);
usernameTIL = (MaterialEditText) findViewById(R.id.usernameTIL);
passwordTIL = (MaterialEditText) findViewById(R.id.passwordTIL2);
signInBTN = (Button) findViewById(R.id.signInBTN);
//Init FireBase
final FirebaseDatabase database = FirebaseDatabase.getInstance();
final DatabaseReference table_user = database.getReference("User");
signInBTN.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final ProgressDialog mDialog = new Progress codeDialog(sign_in.this);
mDialog.setMessage("Please wait...");
mDialog.show();
table_user.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
//check if user doesn't have an account
if (dataSnapshot.child(usernameTIL.getText().toString()).exists()) {
//get user information
mDialog.dismiss();
User user = dataSnapshot.child(usernameTIL.getText().toString()).getValue(User.class);
if (user.getPassword().equals(passwordTIL.getText().toString())) {
Intent homeIntent = new Intent(sign_in.this, HomeScreen.class);
Common.curentUser = user;
startActivity(homeIntent);
finish();
} else {
Toast.makeText(sign_in.this, "Sign In Failed !!", Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(sign_in.this, "User not found !!", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
});
}
}

MaterialEditText is an EditText
public class MaterialEditText extends AppCompatEditText {
it can not contain any widgets. In your layout you have
<com.rengwuxian.materialedittext.MaterialEditText
android:id="#+id/usernameTIL"
android:layout_width="251dp"
android:layout_height="46dp"
android:layout_marginStart="8dp"
android:layout_marginTop="12dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.527"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView">
<com.rengwuxian.materialedittext.MaterialEditText
android:layout_width="268dp"
android:layout_height="36dp"
android:hint="username" />
</com.rengwuxian.materialedittext.MaterialEditText>
a MaterialEditText containing another MaterialEditText, which is causing your app to crash for ClassCastException

According to this library's sample code, you must cast your MaterialEditText to EditTextlike this:
usernameTIL = (EditText) findViewById(R.id.usernameTIL);
passwordTIL = (EditText) findViewById(R.id.passwordTIL2);

How to open a new activity on click of textview in android?

I am new to android programming world, I have designed as a layout with username, password AS edittext control and "forgot password" as textview control, on click/tap of "forgot password", I want to open a new activity.
This is what I am trying, looking forward for your help.
My Application's xml and java code is mentioned below.
<?xml version="1.0" encoding="utf-8"?>
<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:id="#+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/holo_blue_light">
<TextView
android:id="#+id/txtVwAccountLogin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Account Login"
android:textColor="#android:color/background_light"
android:textSize="24sp"
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="0.057" />
<EditText
android:id="#+id/eTxtUserName"
android:layout_width="288dp"
android:layout_height="48dp"
android:background="#android:color/background_light"
android:ems="10"
android:hint=" Username"
android:inputType="textPersonName"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.593"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.406" />
<EditText
android:id="#+id/eTxtPassword"
android:layout_width="290dp"
android:layout_height="45dp"
android:background="#android:color/background_light"
android:ems="10"
android:hint=" Password"
android:inputType="textPassword"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.606"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.535" />
<TextView
android:id="#+id/txtVwForgetPassword"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Forget Password ?"
android:textColor="#android:color/background_light"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.854"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.632" />
<Button
android:id="#+id/btnLogin"
android:layout_width="128dp"
android:layout_height="wrap_content"
android:text="Login"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.779" />
<Button
android:id="#+id/btnRegister"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
android:background="#android:color/holo_blue_light"
android:text="Register"
android:textColor="#android:color/background_light"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.15"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.662" />
</android.support.constraint.ConstraintLayout>
Login.java
public class Login extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
final TextView tvForgotPwd = (TextView) findViewById(R.id.txtVwForgetPassword);
tvForgotPwd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(Login.this, "you clicked me", Toast.LENGTH_SHORT).show();
Intent myIntent = new Intent(view.getContext(),PatientSearch.class);
startActivityForResult(myIntent, 0);
}
});
final Button btnRegister = (Button) findViewById(R.id.btnRegister);
btnRegister.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent myIntent = new Intent(view.getContext(),MainActivity.class);
startActivityForResult(myIntent,0);
}
});

Even though this question has been asked so many times, I decided to answer anyway. This will work:
tvForgotPwd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent myIntent = new Intent(Login.this, PatientSearch.class);
startActivity(myIntent);
}
});

In your onCreate() method, set an OnClickListener callback on your TextView. In the callback, use an Intent to start the desired activity.
Here is an exemple of code:
yourTextView= (TextView) findViewById(R.id.txtVwForgetPassword);
yourTextView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
intent.setData(Uri.parse("https://youraddress.com"));
startActivity(intent);
}
});

Probably it is necessary to try a method
startActivity (new Intent (Activity.this, Open Activity.class));