My application continues crashing and I don't know why [duplicate]

My application continues crashing and I don't know why [duplicate] - android

This question already has answers here:
Can not find a View with findViewById()
(4 answers)
Unfortunately MyApp has stopped. How can I solve this?
(23 answers)
What is a stack trace, and how can I use it to debug my application errors?
(7 answers)
Closed 5 years ago.
I'm trying to write a messaging application, but when I start it, it crashes, and I do not get an error message, so I have no clue why.
Launch Activity:
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.*;
public class ConnectActivity extends AppCompatActivity {
private Client client;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final EditText txtServerAddress = (EditText) findViewById(R.id.edit_text_server_address);
final EditText txtPortNumber = (EditText) findViewById(R.id.edit_text_port_number);
final EditText txtUsername = (EditText) findViewById(R.id.edit_text_username);
final Button btnLogIn = (Button) findViewById(R.id.button_log_in);
btnLogIn.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
String username = txtUsername.getText().toString();
if(username.length() == 0)
return;
String portNumber = txtPortNumber.getText().toString();
if(portNumber.length() == 0)
return;
String serverAddress = txtServerAddress.getText().toString();
if(serverAddress.length() == 0)
return;
int port = 0;
try
{
port = Integer.parseInt(portNumber);
}
catch(Exception en)
{
return;
}
ClientActivity clientActivity = new ClientActivity(client);
client = new Client(serverAddress, port, username, clientActivity);
if(!client.start())
return;
Intent intent = new Intent(ConnectActivity.this, ClientActivity.class);
startActivity(intent);
}
});
setContentView(R.layout.activity_connect);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
}
}
Launch Content xml:
<?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:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.liftedstarfish.lifte.gpschat0_2.ConnectActivity"
tools:showIn="#layout/activity_connect">
<TextView
android:id="#+id/text_view_server_address"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="#string/server_address"
android:textColor="#android:color/black"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/text_view_port_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="#string/port_number"
android:textColor="#android:color/black"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#+id/edit_text_server_address" />
<TextView
android:id="#+id/text_view_username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="#string/username"
android:textColor="#android:color/black"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#+id/edit_text_port_number" />
<EditText
android:id="#+id/edit_text_server_address"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:ems="10"
android:inputType="textPersonName|numberDecimal"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#+id/text_view_server_address" />
<EditText
android:id="#+id/edit_text_port_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:ems="10"
android:inputType="number"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#+id/text_view_port_number" />
<EditText
android:id="#+id/edit_text_username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:ems="10"
android:inputType="textPersonName"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#+id/text_view_username" />
<Button
android:id="#+id/button_log_in"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:text="#string/log_in"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintRight_toRightOf="parent" />
</android.support.constraint.ConstraintLayout>
Launch Activity 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="com.liftedstarfish.lifte.gpschat0_2.ConnectActivity">
<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_connect" />
</android.support.design.widget.CoordinatorLayout>
Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.liftedstarfish.lifte.gpschat0_2">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".ClientActivity"
android:label="#string/title_activity_client"
android:theme="#style/AppTheme.NoActionBar" />
<activity
android:name=".ConnectActivity"
android:label="#string/title_activity_connect"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
As far as I can tell, I've done everything correctly, but the application is still crashes. I've tried cleaning the application and rebuilding it, but that did not help.

Related

White screen after pressing button to go to second page

So all I want to do is click the 'Sign up' button on my app and it takes me to the next page. I have made the second page and added a 'setOnclickListener' to the page I want but when I click on the button it takes me to another page that's white. I'm still new to Kotlin. There are no errors popping up that would effect it. Any ideas?
activity_main.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:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="top|center"
android:orientation="vertical"
android:background="#drawable/gradient_background"
android:padding="20dp"
tools:context=".MainActivity">
<!--logo-->
<ImageView
android:id="#+id/logo_image_view"
android:layout_width="117dp"
android:layout_height="116dp"
android:layout_gravity="center"
android:layout_marginTop="80dp"
android:contentDescription="#string/todo"
android:scaleType="centerInside"
android:src="#drawable/logo"
tools:ignore="ImageContrastCheck" />
<!--non interactive log in text-->
<!--EmailAddress enter text-->
<TextView
android:textSize="20sp"
android:textStyle="bold"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="120dp"/>
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00000000"
android:gravity="center"
android:hint="#string/email"
android:textColorHint="#880E4F"
tools:ignore="VisualLintTextFieldSize,TextContrastCheck" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00000000"
android:gravity="center"
android:hint="#string/password"
android:textColorHint="#4E342E"
tools:ignore="VisualLintTextFieldSize" />
</com.google.android.material.textfield.TextInputLayout>
<ProgressBar
android:id="#+id/progressbar"
android:visibility="gone"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!--Login-->
<Button
android:layout_marginTop="40dp"
android:id="#+id/btn_login"
android:text="#string/login"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!--register button-->
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:id="#+id/button"
android:text="#string/sign_up"
android:onClick="mainActivity"
tools:ignore="UsingOnClickInXml" />
</LinearLayout>
MainActivity.kt
package com.example.gymapp
import android.content.Intent
import android.os.Bundle
import android.view.View
import android.widget.Button
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
private lateinit var signUpButton: Button
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
signUpButton = findViewById(R.id.button)
signUpButton.setOnClickListener {
val intent = Intent(this,RegistrationActivity::class.java)
startActivity(intent)
}
}
fun mainActivity(view: View) {}
}
RegistrationActivity.java
package com.example.gymbuddies;
import android.app.Activity;
public class RegistrationActivity extends Activity {
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:dataExtractionRules="#xml/data_extraction_rules"
android:fullBackupContent="#xml/backup_rules"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.Gymapp"
tools:targetApi="31">
<activity android:name=".register" />
<meta-data
android:name="android.app.lib_name"
android:value="" />
<activity
android:name=".Login"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
<activity
android:name=".SignInActivity"
android:exported="false">
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
<activity android:name=".RegistrationActivity"
android:label="Registration">
</activity>
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
</application>
</manifest>
activity_register.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:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="top|center"
android:orientation="vertical"
android:background="#drawable/gradient_background"
android:padding="20dp"
tools:context=".register">
<!--logo-->
<ImageView
android:id="#+id/logo_image_view"
android:layout_width="117dp"
android:layout_height="116dp"
android:src="#drawable/logo"
android:scaleType="centerInside"
android:layout_marginTop="80dp"
android:layout_gravity="center"
/>
<!--non interactive log in text-->
<!--EmailAddress enter text-->
<TextView
android:textSize="20sp"
android:textStyle="bold"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="120dp"/>
<!--email-->
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00000000"
android:gravity="center"
android:hint="#string/email"
android:textColorHint="#4527A0"
tools:ignore="VisualLintTextFieldSize" />
</com.google.android.material.textfield.TextInputLayout>
<!--name-->
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.textfield.TextInputEditText
android:gravity="center"
android:id="#+id/name"
android:hint="#string/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00000000"
tools:ignore="VisualLintTextFieldSize" />
</com.google.android.material.textfield.TextInputLayout>
<!--dob-->
<!--password-->
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.textfield.TextInputEditText
android:gravity="center"
android:id="#+id/password"
android:hint="#string/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00000000"
tools:ignore="VisualLintTextFieldSize" />
</com.google.android.material.textfield.TextInputLayout>
<ProgressBar
android:id="#+id/progressbar"
android:visibility="gone"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:layout_marginTop="50dp"
android:id="#+id/btn_register"
android:text="#string/register"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
Register.kt
package com.example.gymapp
import android.os.Bundle
import android.view.View
import android.widget.Button
import android.widget.ProgressBar
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.google.android.material.textfield.TextInputEditText
import com.google.firebase.auth.FirebaseAuth
class Register : AppCompatActivity() {
private lateinit var editTextEmail: TextInputEditText
private lateinit var editTextPassword: TextInputEditText
private lateinit var editName: TextInputEditText
private lateinit var buttonReg: Button
private lateinit var mAuth: FirebaseAuth
private lateinit var progressbar: ProgressBar
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_register)
mAuth = FirebaseAuth.getInstance()
progressbar = findViewById(R.id.progressbar)
editTextEmail = findViewById(R.id.email)
editTextPassword = findViewById(R.id.password)
editName = findViewById(R.id.name)
buttonReg = findViewById(R.id.btn_register)
buttonReg.setOnClickListener {
progressbar.visibility = View.VISIBLE
val email = editTextEmail.text.toString()
val password = editTextPassword.text.toString()
editName.text.toString()
// handle the button click event
if (email.isEmpty() || password.isEmpty()) {
Toast.makeText(this, "Wrong email or password", Toast.LENGTH_SHORT).show()
progressbar.visibility = View.GONE
return#setOnClickListener
}
mAuth.createUserWithEmailAndPassword(email, password)
.addOnCompleteListener(this) { task ->
progressbar.visibility = View.GONE
if (task.isSuccessful) {
Toast.makeText(baseContext, "Welcome!.",
Toast.LENGTH_SHORT).show()
} else {
// If sign in fails, display a message to the user.
Toast.makeText(baseContext, "Authentication failed.",
Toast.LENGTH_SHORT).show()
}
}
}
}
}
strings.xml
<resources>
<string name="app_name">GymBuddies</string>
<string name="password">Password</string>
<string name="email_address">Email Address</string>
<string name="type_your_name">Type your name</string>
<string name="login">Login</string>
<string name="email">Email</string>
<string name="register">register</string>
<string name="name">Name</string>
<string name="sign_up">Sign up</string>
<string name="todo">TODO</string>
</resources>
I've read through the code numerous times and I can't see anything conflicting.

Intent in MainActivity starting another activity, prevents MainActivity code from executing

Im new to kotlin and Im trying to make a navigation bar with a time selector based on NumberPicker, with 2 other empty fragments (for now atleast), but my problem is that if I start an intent the Navigation bar doesnt show, when I dont put it in code (intent) the navigation bar shows up working correctly, what Im doing wrong, am I missing something??
MainActivity.kt
package com.example.helloworld
import android.content.Intent
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.fragment.app.Fragment
import com.example.helloworld.databinding.ActivityMainBinding
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
binding.bottomNavigationView.setOnItemSelectedListener {
when (it.itemId) {
R.id.first -> replaceFragment(Home())
R.id.second -> replaceFragment(Voices())
R.id.third -> replaceFragment(Settings())
else -> {
}
}
true
}
replaceFragment(Home())
Intent(this, SecondActivity::class.java).also {
startActivity(it)
}
}
private fun replaceFragment(fragment: Fragment) {
val fragmentManager = supportFragmentManager
val fragmentTransaction = fragmentManager.beginTransaction()
fragmentTransaction.replace(R.id.frameLayout, fragment)
fragmentTransaction.commit()
}
}
SecondActivity.kt
package com.example.helloworld
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_second.*
class SecondActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_second)
numPickerMin2.minValue = 0
numPickerMin2.maxValue = 23
numPickerSec2.minValue = 0
numPickerSec2.maxValue = 59
var min = 0
var sec = 0
var amOrPm = ""
val str = arrayOf<String>("AM", "PM")
numPickerAM2.minValue = 0
numPickerAM2.maxValue = (str.size - 1)
numPickerAM2.displayedValues = str
numPickerMin2.setOnValueChangedListener { numberPicker, i, i2 ->
min = numberPicker.value
}
numPickerSec2.setOnValueChangedListener { numberPicker, i, i2 ->
sec = numberPicker.value
}
numPickerAM2.setOnValueChangedListener { numberPicker, i, i2 ->
val i = numberPicker.value
amOrPm = str[i]
}
btGetValue2.setOnClickListener {
reminderTime2.text = "$min : $sec : $amOrPm"
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.helloworld"
android:installLocation="preferExternal"
android:versionCode="1"
android:versionName="0.2">
<uses-sdk
android:minSdkVersion="18"
android:targetSdkVersion="27" />
<application
android:allowBackup="true"
android:dataExtractionRules="#xml/data_extraction_rules"
android:fullBackupContent="#xml/backup_rules"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
tools:targetApi="31"
android:theme="#style/Theme.HelloWorld">
<activity
android:name=".MainActivity"
android:exported="true"
android:screenOrientation="sensorPortrait"
android:label="#string/app_name"
android:launchMode="singleInstance">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SecondActivity">
</activity>
</application>
</manifest>
ActivityMain.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">
<FrameLayout
android:id="#+id/frameLayout"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="#id/bottomNavigationView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
</FrameLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="#menu/bottom_nav"/>
</androidx.constraintlayout.widget.ConstraintLayout>
activity_second.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:layout_marginStart="1dp"
android:layout_marginTop="1dp"
android:layout_marginEnd="1dp"
android:layout_marginBottom="1dp"
android:background="#color/BackgroundFirst"
tools:context=".Home">
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/textInputLayout4"
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.Dense.ExposedDropdownMenu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:layout_marginTop="55dp"
app:layout_constraintEnd_toStartOf="#+id/guideline2"
app:layout_constraintStart_toStartOf="#+id/guideline2"
app:layout_constraintTop_toTopOf="#+id/guideline3">
<AutoCompleteTextView
android:id="#+id/dropdown_field"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="none"
android:text="Choose Alert"/>
</com.google.android.material.textfield.TextInputLayout>
<com.shawnlin.numberpicker.NumberPicker
android:id="#+id/numPickerMin2"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_centerInParent="true"
android:layout_marginEnd="23dp"
android:gravity="center"
android:theme="#style/AppTheme.Picker"
app:layout_constraintBottom_toBottomOf="#+id/numPickerSec2"
app:layout_constraintEnd_toStartOf="#+id/numPickerSec2"
app:layout_constraintTop_toTopOf="#+id/numPickerSec2"
app:np_dividerColor="#color/black"
app:np_dividerDistance="55dp"
app:np_dividerLength="100dp"
app:np_dividerThickness="3dp"
app:np_formatter=""
app:np_height="180dp"
app:np_max="12"
app:np_min="0"
app:np_selectedTextColor="#color/selected"
app:np_selectedTextSize="60sp"
app:np_textAlign="textAlignCenter"
app:np_textColor="#color/black"
app:np_textSize="40sp"
app:np_typeface="#string/roboto_light"
app:np_value="1"
app:np_wheelItemCount="10"
app:np_width="74dp"
app:np_wrapSelectorWheel="true" />
<com.shawnlin.numberpicker.NumberPicker
android:id="#+id/numPickerSec2"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_centerInParent="true"
android:layout_marginTop="37dp"
android:layout_marginEnd="9dp"
android:layout_marginBottom="27dp"
android:gravity="center"
android:theme="#style/AppTheme.Picker"
app:layout_constraintBottom_toTopOf="#+id/textInputLayout4"
app:layout_constraintEnd_toStartOf="#+id/numPickerAM2"
app:layout_constraintTop_toBottomOf="#+id/imageView2"
app:np_dividerColor="#color/black"
app:np_dividerDistance="55dp"
app:np_dividerLength="100dp"
app:np_dividerThickness="3dp"
app:np_formatter=""
app:np_height="180dp"
app:np_max="59"
app:np_min="0"
app:np_selectedTextColor="#color/selected"
app:np_selectedTextSize="60sp"
app:np_textAlign="textAlignCenter"
app:np_textColor="#color/black"
app:np_textSize="40sp"
app:np_typeface="#string/roboto_light"
app:np_value="1"
app:np_wheelItemCount="10"
app:np_width="74dp"
app:np_wrapSelectorWheel="true" />
<com.shawnlin.numberpicker.NumberPicker
android:id="#+id/numPickerAM2"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_centerInParent="true"
android:layout_marginStart="56dp"
android:layout_marginEnd="55dp"
android:gravity="center"
android:theme="#style/AppTheme.Picker"
app:layout_constraintBottom_toBottomOf="#+id/numPickerSec2"
app:layout_constraintEnd_toEndOf="#+id/imageView2"
app:layout_constraintStart_toStartOf="#+id/guideline2"
app:layout_constraintTop_toTopOf="#+id/numPickerSec2"
app:np_dividerColor="#color/black"
app:np_dividerDistance="55dp"
app:np_dividerLength="100dp"
app:np_dividerThickness="3dp"
app:np_formatter=""
app:np_height="180dp"
app:np_max="1"
app:np_min="0"
app:np_selectedTextColor="#color/selected"
app:np_selectedTextSize="60sp"
app:np_textAlign="textAlignCenter"
app:np_textColor="#color/black"
app:np_textSize="40sp"
app:np_typeface="#string/roboto_light"
app:np_value="1"
app:np_wheelItemCount="10"
app:np_width="74dp"
app:np_wrapSelectorWheel="true" />
<Button
android:id="#+id/btGetValue2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="78dp"
android:backgroundTint="#color/selected"
android:baselineAligned="false"
android:text="Get Time"
android:textSize="15sp"
app:layout_constraintBottom_toTopOf="#+id/reminderTime2"
app:layout_constraintEnd_toStartOf="#+id/guideline2"
app:layout_constraintStart_toStartOf="#+id/guideline2" />
<TextView
android:id="#+id/reminderTime2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="63dp"
android:text="Time"
android:textSize="40sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/guideline2"
app:layout_constraintStart_toStartOf="#+id/guideline2" />
<ImageView
android:id="#+id/imageView2"
android:layout_width="351dp"
android:layout_height="103dp"
android:layout_marginTop="16dp"
android:layout_weight="1"
android:scaleX="1.5"
android:scaleY="1.5"
app:layout_constraintEnd_toStartOf="#+id/guideline2"
app:layout_constraintStart_toStartOf="#+id/guideline2"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/helloday_logo" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5"
/>
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.5" />
</androidx.constraintlayout.widget.ConstraintLayout>

Instead of creating a second activity, I suggest that you create another fragment. Use it in the same way as the other fragments which you currently have in your app.

RegisterActivity does not call activity_main.xml

I'm trying to start this activity_main.xlm after a user's registration flow, but when I click on the button, the app closes. I work a little time with Android but I couldn't identify this error.
I need that after clicking the register button, the app remains pressed and calls activity_main.xml
As Logcat shows, the data passes through the api {"insert":"ok"}, but the application closes and does not call activity_main.
RegisterActivity.java
public class RegisterActivity extends AppCompatActivity {
EditText et_name, et_email, et_password, et_repassword;
Button btn_register, btn_login;
#Override
protected void onCreate(Bundle savedInstanceState) {
getSupportActionBar().setTitle("REGISTER");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
et_name = findViewById(R.id.et_name);
et_email =findViewById(R.id.et_email);
et_password = findViewById(R.id.et_password);
et_repassword = findViewById(R.id.et_repassword);
btn_register= findViewById(R.id.btn_register);
btn_login = findViewById(R.id.btn_login);
btn_register.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(TextUtils.isEmpty(et_email.getText().toString()) || TextUtils.isEmpty(et_name.getText().toString()) || TextUtils.isEmpty(et_password.getText().toString()) || TextUtils.isEmpty(et_repassword.getText().toString())){
String message = "All input required";
Toast.makeText(RegisterActivity.this, message,Toast.LENGTH_LONG).show();
}else {
RegisterRequest registerRequest = new RegisterRequest();
registerRequest.setName_app(et_name.getText().toString());
registerRequest.setEmail_app(et_email.getText().toString());
registerRequest.setPassword_app(et_password.getText().toString());
sendRegister(registerRequest);
}
}
});
}
private void sendRegister(RegisterRequest registerRequest) {
Call<RegisterResponse> registerResponseCall=ApiClient.getService().registerUser(registerRequest);
registerResponseCall.enqueue(new Callback<RegisterResponse>() {
#Override
public void onResponse(Call<RegisterResponse> call, Response<RegisterResponse> response) {
if (response.isSuccessful()){
String message = "Successful";
Toast.makeText(RegisterActivity.this, message,Toast.LENGTH_LONG).show();
startActivity(new Intent(RegisterActivity.this,MainActivity.class));
finish();
}else{
String message = "An error occurred please try again later...";
Toast.makeText(RegisterActivity.this, message,Toast.LENGTH_LONG).show();
}
}
#Override
public void onFailure(Call<RegisterResponse> call, Throwable t) {
String message = t.getLocalizedMessage();
Toast.makeText(RegisterActivity.this, message,Toast.LENGTH_LONG).show();
}
});
}
}
activity_register.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"
tools:context=".RegisterActivity">
<TextView
android:id="#+id/tv_logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/register"
android:textAlignment="center"
android:textSize="50sp"
android:layout_marginStart="25dp"
android:layout_marginBottom="5dp"
android:fontFamily="#font/indigo_daisy"
android:layout_marginTop="60dp"/>
<TextView
android:id="#+id/tv_subtitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tag"
android:textSize="17sp"
android:fontFamily="#font/roboto_regular"
android:layout_marginStart="25dp"
android:layout_marginBottom="50dp"/>
<EditText
android:id="#+id/et_name"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="#string/your_name"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp"
android:padding="15dp"
android:inputType="textPersonName"
android:fontFamily="#font/roboto_regular"
android:background="#drawable/et_custom"
android:textSize="15sp" />
<EditText
android:id="#+id/et_email"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="#string/e_mail"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp"
android:padding="15dp"
android:fontFamily="#font/roboto_regular"
android:inputType="textEmailAddress"
android:background="#drawable/et_custom"
android:textSize="15sp" />
<EditText
android:id="#+id/et_password"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="#string/password"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp"
android:padding="15dp"
android:fontFamily="#font/roboto_regular"
android:inputType="textPassword"
android:background="#drawable/et_custom"
android:textSize="15sp"
app:errorEnabled="true"/>
<EditText
android:id="#+id/et_repassword"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="#string/re_type_password"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:padding="15dp"
android:fontFamily="#font/roboto_regular"
android:inputType="textPassword"
android:background="#drawable/et_custom"
android:textSize="15sp"
app:errorEnabled="true"
app:hintEnabled="false"
app:passwordToggleEnabled="true"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<Button
android:id="#+id/btn_register"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/btn_custom"
android:fontFamily="#font/roboto_regular"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="30dp"
android:layout_centerInParent="true"
android:textColor="#android:color/white"
android:text="#string/register"/>
<Button
android:id="#+id/btn_login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="200dp"
android:background="#drawable/btn_custom"
android:fontFamily="#font/roboto_regular"
android:text="#string/login"
android:textColor="#android:color/white" />
</RelativeLayout>
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
LoginResponse loginResponse;
#Override
protected void onCreate(Bundle savedInstanceState) {
getSupportActionBar().hide();
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = getIntent();
if (intent.getExtras() != null) {
loginResponse = (LoginResponse) intent.getSerializableExtra("data");
Log.e("TAG", "====>" + loginResponse.getEmail());
}
}
}
activity_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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
tools:context=".MainActivity">
<ImageView
android:src="#drawable/ic_launcher_foreground"
android:layout_width="188dp"
android:layout_height="200dp"
android:background="#color/colorPrimaryDark"/>
<TextView
android:text="#string/app_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAllCaps="true"
android:textColor="#color/colorPrimaryDark"/>
</LinearLayout>
manifest.xml
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:usesCleartextTraffic="true"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".RegisterActivity" />
<activity android:name=".MainActivity"/>
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Logcat
2021-12-09 22:29:45.631 22677-23634/com.guincho.chamemeuguincho E/AndroidRuntime: FATAL EXCEPTION: OkHttp Dispatcher
Process: com.guincho.chamemeuguincho, PID: 22677
java.lang.NoSuchMethodError: No static method metafactory(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite; in class Ljava/lang/invoke/LambdaMetafactory; or its super classes (declaration of 'java.lang.invoke.LambdaMetafactory' appears in /apex/com.android.art/javalib/core-oj.jar)
at retrofit2.DefaultCallAdapterFactory$ExecutorCallbackCall$1.onResponse(DefaultCallAdapterFactory.java:77)
at retrofit2.OkHttpCall$1.onResponse(OkHttpCall.java:150)
at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:519)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:923)
2021-12-09 22:29:45.675 22677-22677/com.guincho.chamemeuguincho I/ViewRootImpl#9ebca35[LoginActivity]: stopped(false) old=true
2021-12-09 22:29:45.678 22677-23634/com.guincho.chamemeuguincho I/Process: Sending signal. PID: 22677 SIG: 9

You should not get the support action bar before setcontentview is called.
Simply, move getSupportActionBar().hide(); after setContentView(R.layout.activity_main); and it should not crash anymore
Also please provide crash logs in the future, so we can debug quicker

Android RecyclerView is not working properly

I'm new at programming on Android and still learning. I'm having a problem right now which is my RecyclerView is not working properly. When I'm running my apps it's not showing any error at logcat. The problems are:
Sometime it will load all the items, but sometime it will just showing blank screen so I usually press the back button and enter the activity again and it will load the items.
Sometimes it loads the item but I can't do anything about my recyclerview. I can't click or scroll the RecyclerView.
And sometimes it just works 100% without error.
I'm using CardView in my RecyclerView and I'm using the Retrofit library.
Here are my codes :
Android Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.myappcompany.jason.financepharos">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="Finance Demo Apps"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<!-- Login Activity - Form 1 -->
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Main Activity - Form 2 -->
<activity android:name=".MainActivity"/>
<!-- Master Project Activity - Form 3 -->
<activity android:name=".MasterProjectActivity" />
<!-- Project Activity (Create) - Form 3.1 -->
<activity android:name=".ProjectActivity"
android:noHistory="true"/>
<!-- Project Activity (Read/View) - Form 3.2 -->
<activity android:name=".ProjectActivityView"
android:noHistory="true"/>
<!-- Project Activity (Update and Delete) - Form 3.3 -->
<activity android:name=".ProjectActivityUpdate"
android:noHistory="true"/>
</application>
</manifest>
XML (RecyclerView)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical"
android:id="#+id/recyclerTemp">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
XML (CardView)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical">
<android.support.v7.widget.CardView
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="wrap_content"
android:layout_margin="5dp"
app:cardElevation="8dp"
android:clickable="false">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="130dp"
android:layout_height="wrap_content"
android:text="P. ID"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="5dp"
android:layout_height="wrap_content"
android:text=":" />
<TextView
android:id="#+id/tvProjectID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="130dp"
android:layout_height="wrap_content"
android:text="P. Name"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="5dp"
android:layout_height="wrap_content"
android:text=":" />
<TextView
android:id="#+id/tvProjectName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="130dp"
android:layout_height="wrap_content"
android:text="P. Application Name"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="5dp"
android:layout_height="wrap_content"
android:text=":" />
<TextView
android:id="#+id/tvProjectApplicationName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text=""
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="130dp"
android:layout_height="wrap_content"
android:text="P. Aktif Y/N"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="5dp"
android:layout_height="wrap_content"
android:text=":" />
<TextView
android:id="#+id/tvProjectAktifYN"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="130dp"
android:layout_height="wrap_content"
android:text="P. Update ID"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="5dp"
android:layout_height="wrap_content"
android:text=":" />
<TextView
android:id="#+id/tvProjectUpdateID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="130dp"
android:layout_height="wrap_content"
android:text="P. Update Time"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="5dp"
android:layout_height="wrap_content"
android:text=":" />
<TextView
android:id="#+id/tvProjectUpdateTime"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp" />
</LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
My Adapter :
//Adapter Data Master Project
public class AdapterData extends RecyclerView.Adapter<AdapterData.HolderData> {
private List<DataModel> mList;
private Context ctx;
public AdapterData (Context ctx, List<DataModel> mList){
this.ctx = ctx;
this.mList = mList;
}
#NonNull
#Override
public HolderData onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View layout = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.layoutlistproject,viewGroup, false);
HolderData holder = new HolderData(layout);
return holder;
}
#Override
public void onBindViewHolder(#NonNull HolderData holder, int i) {
DataModel dm = mList.get(i);
holder.MSTPRJ_ID.setText(dm.getMSTPRJ_ID());
holder.MSTPRJ_Name.setText(dm.getMSTPRJ_Name());
holder.MSTPRJ_ApplicationName.setText(dm.getMSTPRJ_ApplicationName());
holder.MSTPRJ_AktifYN.setText(dm.getMSTPRJ_AktifYN());
holder.MSTPRJ_UpdateID.setText(dm.getMSTPRJ_UpdateID());
holder.MSTPRJ_UpdateTime.setText(dm.getMSTPRJ_UpdateTime());
holder.dm = dm;
}
#Override
public int getItemCount() {
return mList.size();
}
class HolderData extends RecyclerView.ViewHolder{
TextView MSTPRJ_ID, MSTPRJ_Name, MSTPRJ_ApplicationName, MSTPRJ_AktifYN, MSTPRJ_UpdateID, MSTPRJ_UpdateTime;
DataModel dm;
public HolderData (View v){
super(v);
MSTPRJ_ID = (TextView) v.findViewById(R.id.tvProjectID);
MSTPRJ_Name = (TextView) v.findViewById(R.id.tvProjectName);
MSTPRJ_ApplicationName = (TextView) v.findViewById(R.id.tvProjectApplicationName);
MSTPRJ_AktifYN = (TextView) v.findViewById(R.id.tvProjectAktifYN);
MSTPRJ_UpdateID = (TextView) v.findViewById(R.id.tvProjectUpdateID);
MSTPRJ_UpdateTime = (TextView) v.findViewById(R.id.tvProjectUpdateTime);
v.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent goInput = new Intent(ctx, ProjectActivityUpdate.class);
goInput.putExtra("MSTPRJ_ID", dm.getMSTPRJ_ID());
goInput.putExtra("MSTPRJ_Name", dm.getMSTPRJ_Name());
goInput.putExtra("MSTPRJ_ApplicationName", dm.getMSTPRJ_ApplicationName());
goInput.putExtra("MSTPRJ_AkitfYN", dm.getMSTPRJ_AktifYN());
goInput.putExtra("MSTPRJ_UpdateID", dm.getMSTPRJ_UpdateID());
goInput.putExtra("MSTPRJ_UpdateTime", dm.getMSTPRJ_UpdateTime());
v.setOnClickListener(this);
ctx.startActivity(goInput);
}
});
}
}
}
My Activity :
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_project_view);
pd = new ProgressDialog(this);
mRecyclerProject = (RecyclerView) findViewById(R.id.recyclerTemp);
mRecyclerProject.setHasFixedSize(true);
mManager = new
LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
mRecyclerProject.setLayoutManager(mManager);
pd.setMessage("Loading...");
pd.setCancelable(false);
pd.show();
Call<ResponsModel> call = RetroServer.retrofitRequest().readProject();
call.enqueue(new Callback<ResponsModel>() {
#Override
public void onResponse(Call<ResponsModel> call,
Response<ResponsModel> response) {
pd.hide();
Log.d("RETRO", "Response : " + response.body().getKode());
mItems = response.body().getResult();
mAdapterProject = new AdapterData(ProjectActivityView.this,
mItems);
mRecyclerProject.setAdapter(mAdapterProject);
mAdapterProject.notifyDataSetChanged();
}
#Override
public void onFailure(Call<ResponsModel> call, Throwable t) {
pd.hide();
Log.d("RETRO", "Failed : Response Gagal");
}
});
}
#Override
public void onDestroy(){
super.onDestroy();
if(pd != null){
pd.dismiss();
pd = null;
}
}
}
Thankyou :)

Android Buttons dont work click on click

I'm new new to Android and am working on a simple project that needs login and sign up.
When I click on the links to link to another activity, The buttons do not work.
here is my code....
<?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:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/bg_login"
android:gravity="center"
android:padding="10dp"
tools:context=".LoginActivity">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:weightSum="1">
<ImageView android:src="#drawable/logo_bg"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_marginBottom="100dp"
android:layout_gravity="center_horizontal"
android:contentDescription="#string/Zilwacom_Logo" />
<TextView android:id="#+id/login"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_marginBottom="24dp"
android:text="#string/welcome_to_zilwacom"
android:gravity="center"
android:textSize="24sp"
android:layout_weight="0.14" />
<!-- Email Label -->
<EditText
android:id="#+id/loginemail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:hint="#string/Email" />
<!-- Password Label -->
<EditText
android:id="#+id/loginpassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:hint="#string/Password"/>
<Button
android:id="#+id/btnlogin"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:layout_marginBottom="24dp"
android:padding="12dp"
android:text="#string/Login"/>
<TextView
android:id="#+id/linksignup"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dip"
android:background="#null"
android:text="#string/btn_link_to_register"
android:textAllCaps="false"
android:textColor="#color/white"
android:textSize="15dp"
android:clickable="true"/>
</LinearLayout>
</LinearLayout>
and my login code
When the user clicks to sign up, the app shd open the signup activity
public class LoginActivity extends AppCompatActivity {
private EditText email;
private EditText password;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//Get reference to buttons and texts
//buttons
Button loginbtn =(Button) findViewById(R.id.btnlogin);
TextView signuplink=(TextView) findViewById(R.id.linksignup);
//Texts
email=(EditText) findViewById(R.id.loginemail);
password=(EditText) findViewById(R.id.loginpassword);
signuplink.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent i = new Intent(LoginActivity.this, SignupActivity.class);
startActivity(i);
}
});
}
}

I managed to do it guys,
The problem was in the manifest...
I made the change as below..
<activity
android:name=".LoginActivity"
android:label="#string/app_name"
android:launchMode="singleTop"
android:windowSoftInputMode="adjustPan" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

Add/change in your code:
loginbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent i = new Intent(LoginActivity.this, SignupActivity.class);
startActivity(i);
}
});
}
Set onClickListener to your Button [loginbtn] not TextView [signuplink].
In your xml layout file add to TextView android:clickable = "true"

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

My application continues crashing and I don't know why [duplicate] - android

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