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I want to make a search bar for this code to search by buttons (between btn1 and btn2 and btn3) and hide the non-matched results

I am trying to add a search bar that enables me to search by buttons, search between btn1 and btn2 and btn3. I tried a lot of codes but all of them were focused on TextView and not on buttons. So hope to help me and if I missed details please let me know to describe more.
The two files (.java and .xml) are typed below. thank you.
file.java
package com.example.myapp1;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.SearchView;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.DownloadManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
SearchView sv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getSupportActionBar().setTitle("My First App");
Button btn1 = findViewById(R.id.btn1);
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, MainActivity2.class);
startActivity(intent);
}});
Button btn2 = findViewById(R.id.btn2);
btn2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, MainActivity3.class);
startActivity(intent);
}});
Button btn3 = findViewById(R.id.btn3);
btn3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, MainActivity4.class);
startActivity(intent);
}});
List<Button> buttonList = new ArrayList<>();
buttonList.add(view.findViewById(R.id.btn1));
buttonList.add(view.findViewById(R.id.btn2));
buttonList.add(view.findViewById(R.id.btn3));
sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String s) {
for(int i = 0; i < buttonList.size(); i++) {
String buttonText = (String) buttonList.get(i).getText();
if(buttonText.toLowerCase(Locale.ROOT).equals(s.toLowerCase())) {
buttonList.get(i).setVisibility(View.VISIBLE);
} else {
buttonList.get(i).setVisibility(View.INVISIBLE);
}
}
return false;
}
#Override
public boolean onQueryTextChange(String s) {
if(s.isEmpty()) {
for(int i = 0; i < buttonList.size(); i++) {
buttonList.get(i).setVisibility(View.VISIBLE);
}
}
return false;
}
});
}
}
file.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"
tools:context=".MainActivity"
tools:ignore="ExtraText"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:layout_marginHorizontal="10dp"
android:orientation="vertical"
android:weightSum="2">
<Button
android:id="#+id/btn1"
android:layout_width="match_parent"
android:layout_height="90dp"
android:textAllCaps="false"
android:textSize="25dp"
android:layout_marginHorizontal="10dp"
android:layout_weight="1"
android:background="#drawable/gradient"
android:textColor="#color/white"
android:text="Absolute Pressure" />
<Space
android:layout_width="match_parent"
android:layout_height="15dp"
android:layout_weight="1" />
<Button
android:id="#+id/btn2"
android:layout_width="match_parent"
android:layout_height="90dp"
android:textAllCaps="false"
android:textSize="25dp"
android:layout_marginHorizontal="10dp"
android:layout_weight="1"
android:background="#drawable/gradient"
android:textColor="#color/white"
android:text="Acoustic Flowmeter" />
<Space
android:layout_width="match_parent"
android:layout_height="15dp"
android:layout_weight="1" />
<Button
android:id="#+id/btn3"
android:layout_width="match_parent"
android:layout_height="90dp"
android:textAllCaps="false"
android:textSize="25dp"
android:layout_marginHorizontal="10dp"
android:layout_weight="1"
android:background="#drawable/gradient"
android:textColor="#color/white"
android:text="Bernoulli Number" />
<Space
android:layout_width="match_parent"
android:layout_height="15dp"
android:layout_weight="1" />
</LinearLayout>
</LinearLayout>

What do you mean by search by buttons? Are you looking to search the text that is held within the button?
Here is a way you can go about this:
Make a list that contains all the instances of your buttons.
List(findViewById(R.id.btn1), etc)
List<Button> buttonList = new ArrayList<>();
buttonList.add(view.findViewById(R.id.button_search1));
buttonList.add(view.findViewById(R.id.button_search2));
buttonList.add(view.findViewById(R.id.button_search3));
We are going to use the listeners available to the search view to do the work.
sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
// You can use this for when the submit is clicked
#Override
public boolean onQueryTextSubmit(String s) {
// We loop over the button list
for(int i = 0; i < buttonList.size(); i++) {
// We get the text of the button
String buttonText = (String) buttonList.get(i).getText();
// We turn both the button text and search result to lowercase
// So that results are not case sensitive
// If they match
if(buttonText.toLowerCase(Locale.ROOT).equals(s.toLowerCase())) {
// We make button visible
buttonList.get(i).setVisibility(View.VISIBLE);
} else {
// If it doesn't, we make invisible
buttonList.get(i).setVisibility(View.INVISIBLE);
}
}
return false;
}
// You can use this when the text is changing.
#Override
public boolean onQueryTextChange(String s) {
// If text is empty, reset results
if(s.isEmpty()) {
for(int i = 0; i < buttonList.size(); i++) {
buttonList.get(i).setVisibility(View.VISIBLE);
}
}
return false;
}
});

Android java audio player playing in background

I am creating a audio player, for Android mobile application, writed in Java langauge. I am struggling with adding to my mobile app possiblity to play audio in background. When I get back during playing audio in player to menu or minimalize app audio stops.
I searched for solution in net but I can't find how to do this in my player.
I will accept any help. Many thanks for any suggestions.
Audio player code:
package com.mc.englishlearn.audioplayer;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.database.Cursor;
import android.media.AudioAttributes;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import com.mc.englishlearn.R;
import java.io.IOException;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
public class PlayerActivity extends AppCompatActivity {
MediaPlayer mediaPlayer;
Button play, replay, open;
SeekBar seekBar;
TextView title, elapse;
String duration;
ScheduledExecutorService timer;
public static final int PICK_FILE =99;
boolean isRepeat = false;
#Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_player);
play = (Button)findViewById(R.id.play);
replay = (Button) findViewById(R.id.replay);
open = (Button) findViewById(R.id.open);
seekBar = (SeekBar) findViewById(R.id.seekBar);
title = (TextView) findViewById(R.id.title);
elapse = (TextView) findViewById(R.id.elapsed);
//Otwieranie pliku dzwiękowego
open.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("audio/*");
startActivityForResult(intent, PICK_FILE);
}
});
//odtwarzanie pliku
play.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(mediaPlayer != null){
if(mediaPlayer.isPlaying()){
mediaPlayer.pause();
play.setText("PLAY");
timer.shutdown();
}else{
mediaPlayer.start();
play.setText("PAUSE");
timer = Executors.newScheduledThreadPool(1);
timer.scheduleAtFixedRate(new Runnable() {
#Override
public void run() {
if (mediaPlayer != null) {
if (!seekBar.isPressed()) {
seekBar.setProgress(mediaPlayer.getCurrentPosition());
}
}
}
},10,10, TimeUnit.MILLISECONDS);
}
}
}
});
//linia dzwięku
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
if (mediaPlayer != null){
int millis = mediaPlayer.getCurrentPosition();
long total_secs = TimeUnit.SECONDS.convert(millis, TimeUnit.MILLISECONDS);
long mins = TimeUnit.MINUTES.convert(total_secs, TimeUnit.SECONDS);
long secs = total_secs - (mins*60);
elapse.setText(mins + ":" + secs + " / " + duration);
}
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
if (mediaPlayer != null) {
mediaPlayer.seekTo(seekBar.getProgress());
}
}
});
//Pętla
replay.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//repeat = false
if(isRepeat){
isRepeat = false;
mediaPlayer.setLooping(false);
Toast.makeText(PlayerActivity.this, "Repeat is OFF", Toast.LENGTH_SHORT).show();
}else{
isRepeat = true;
mediaPlayer.setLooping(true);
Toast.makeText(PlayerActivity.this, "Repeat is ON", Toast.LENGTH_SHORT).show();
}
//mediaPlayer.setLooping(true);
// Toast.makeText(PlayerActivity.this, "Repeat if ON", Toast.LENGTH_SHORT).show();
}
});
play.setEnabled(false);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_FILE && resultCode == RESULT_OK){
if (data != null){
Uri uri = data.getData();
createMediaPlayer(uri);
}
}
}
//Stwórz odtwarzacz dzwiękowy
public void createMediaPlayer(Uri uri){
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioAttributes(
new AudioAttributes.Builder()
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.setUsage(AudioAttributes.USAGE_MEDIA)
.build()
);
try {
mediaPlayer.setDataSource(getApplicationContext(), uri);
mediaPlayer.prepare();
title.setText(getNameFromUri(uri));
play.setEnabled(true);
int millis = mediaPlayer.getDuration();
long total_secs = TimeUnit.SECONDS.convert(millis, TimeUnit.MILLISECONDS);
long mins = TimeUnit.MINUTES.convert(total_secs, TimeUnit.SECONDS);
long secs = total_secs - (mins*60);
duration = mins + ":" + secs;
elapse.setText("00:00 / " + duration);
seekBar.setMax(millis);
seekBar.setProgress(0);
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
releaseMediaPlayer();
}
});
} catch (IOException e){
title.setText(e.toString());
}
}
#SuppressLint("Range")
public String getNameFromUri(Uri uri){
String fileName = "";
Cursor cursor = null;
cursor = getContentResolver().query(uri, new String[]{
MediaStore.Images.ImageColumns.DISPLAY_NAME
}, null, null, null);
if (cursor != null && cursor.moveToFirst()) {
fileName = cursor.getString(cursor.getColumnIndex(MediaStore.Images.ImageColumns.DISPLAY_NAME));
}
if (cursor != null) {
cursor.close();
}
return fileName;
}
#Override
protected void onDestroy() {
super.onDestroy();
releaseMediaPlayer();
}
public void releaseMediaPlayer(){
if (timer != null) {
timer.shutdown();
}
if (mediaPlayer != null) {
mediaPlayer.release();
mediaPlayer = null;
}
play.setEnabled(false);
elapse.setText("TITLE");
elapse.setText("00:00 / 00:00");
seekBar.setMax(100);
seekBar.setProgress(0);
}
}
Xml file code:
<?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">
<SeekBar
android:id="#+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="#+id/guideline3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/guideline2" />
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="195dp"
android:layout_marginTop="178dp"
android:layout_marginEnd="216dp"
app:layout_constraintBottom_toTopOf="#+id/guideline4"
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/elapsed"
android:layout_width="74dp"
android:layout_height="34dp"
android:layout_marginStart="177dp"
android:layout_marginEnd="196dp"
android:text="00-00"
app:layout_constraintBottom_toTopOf="#+id/guideline2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.25"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/guideline4"
app:layout_constraintVertical_bias="0.625" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="271dp" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="339dp" />
<LinearLayout
android:id="#+id/linearLayout"
android:layout_width="93dp"
android:layout_height="108dp"
android:layout_marginStart="160dp"
android:layout_marginEnd="158dp"
android:layout_marginBottom="118dp"
android:orientation="vertical"
app:layout_constraintBottom_toTopOf="#+id/replay"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/guideline3">
<Button
android:id="#+id/play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:backgroundTint="#color/green"
android:text="|>" />
<Button
android:id="#+id/open"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Otwórz plik" />
</LinearLayout>
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="213dp" />
<Button
android:id="#+id/replay"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="powtórz"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/guideline5" />
<Button
android:id="#+id/start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="72dp"
android:text="start"
app:layout_constraintBottom_toBottomOf="#+id/end"
app:layout_constraintEnd_toStartOf="#+id/guideline8"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/guideline5" />
<Button
android:id="#+id/end"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="80dp"
android:text="koniec"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="#+id/guideline8"
app:layout_constraintTop_toTopOf="#+id/guideline5" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="515dp" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_begin="205dp" />
</androidx.constraintlayout.widget.ConstraintLayout>

Use a Service and implement all your Media Player logic there, like for example:
public class MyService extends Service implements MediaPlayer.OnPreparedListener {
private static final String ACTION_PLAY = "com.example.action.PLAY";
MediaPlayer mediaPlayer = null;
public int onStartCommand(Intent intent, int flags, int startId) {
...
if (intent.getAction().equals(ACTION_PLAY)) {
mediaPlayer = ... // initialize it here
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.prepareAsync(); // prepare async to not block main thread
}
}
/** Called when MediaPlayer is ready */
public void onPrepared(MediaPlayer player) {
player.start();
}
}
Then from your Main Activity start the service like so:
Context context = getApplicationContext();
Intent intent = new Intent(...); // Build the intent for the service
context.startForegroundService(intent);

How to increase speed of BLE scanning Android Studio?

I want make some application, it will scanning nearby BLE and sending to server via MQTT. But the scanning proccess to slow. I want to increase the speed of scanning.
mainActivity.java
package com.example.mqtt_active;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import org.eclipse.paho.android.service.MqttAndroidClient;
import org.eclipse.paho.client.mqttv3.IMqttActionListener;
import org.eclipse.paho.client.mqttv3.IMqttToken;
import org.eclipse.paho.client.mqttv3.MqttException;
import java.nio.charset.StandardCharsets;
public class MainActivity extends AppCompatActivity {
private Button turnon, changeLayout;
MqttAndroidClient client;
private boolean state=false;
private BluetoothAdapter bluetoothAdapter;
public static final int REQUEST_ACCESS_COARSE_LOCATION = 1;
public static final int REQUEST_ENABLE_BLUETOOTH = 11;
public static String mqtt_server,mqtt_port,mqtt_id;
private TextView textView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getSupportActionBar().hide();
setContentView(R.layout.activity_main);
turnon = findViewById(R.id.turnon);
changeLayout = findViewById(R.id.mqttSet);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
textView = findViewById(R.id.textView4);
textView.setText("id "+mqtt_id+" port "+mqtt_port+" server "+mqtt_server);
client = new MqttAndroidClient(this.getApplicationContext(), "tcp://"+mqtt_server+":"+mqtt_port,mqtt_id);
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
stateCheck();
handler.postDelayed(this, 1000);
}
}, 1000);
final Handler handlerStop = new Handler();
handlerStop.postDelayed(new Runnable() {
#Override
public void run() {
bluetoothAdapter.cancelDiscovery();
handlerStop.postDelayed(this, 2000);
}
}, 2000);
turnon.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (!state){
turnon.setText("Turn Off");
// if (bluetoothAdapter!=null & bluetoothAdapter.isEnabled()) {
// if(checkCoarsePermission()){
// bluetoothAdapter.startDiscovery();
// }
// }
if(mqtt_server!=null||mqtt_id!=null||mqtt_port!=null){
try {
IMqttToken token = client.connect();
token.setActionCallback(new IMqttActionListener() {
#Override
public void onSuccess(IMqttToken asyncActionToken) {
Toast.makeText(MainActivity.this,"connected!!",Toast.LENGTH_LONG).show();
}
#Override
public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
Toast.makeText(MainActivity.this,"connection failed!!",Toast.LENGTH_LONG).show();
}
});
} catch (MqttException e) {
e.printStackTrace();
}}
state = true;
}else{
turnon.setText("Turn On");
state = false;
// bluetoothAdapter.cancelDiscovery();
}
}
});
changeLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,MqttActivity.class));
}
});
}
public void stateCheck(){
if (state){
if (bluetoothAdapter!=null & bluetoothAdapter.isEnabled()) {
if(checkCoarsePermission()){
bluetoothAdapter.startDiscovery();
}
}
}else {
bluetoothAdapter.cancelDiscovery();
}
}
private boolean checkCoarsePermission(){
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.ACCESS_COARSE_LOCATION},
REQUEST_ACCESS_COARSE_LOCATION);
return false;
}else {
return true;
}
}
#Override
protected void onResume() {
super.onResume();
registerReceiver(devicesFoundReceiver, new IntentFilter(BluetoothDevice.ACTION_FOUND));
registerReceiver(devicesFoundReceiver, new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED));
registerReceiver(devicesFoundReceiver, new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED));
}
#Override
protected void onPause() {
super.onPause();
unregisterReceiver(devicesFoundReceiver);
}
private final BroadcastReceiver devicesFoundReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action= intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action)){
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
int rssi = intent.getShortExtra(BluetoothDevice.EXTRA_RSSI,Short.MIN_VALUE);
String RSSI = String.valueOf(rssi);
Toast.makeText(context.getApplicationContext(),"rssi "+RSSI+" "+device.getAddress(),Toast.LENGTH_SHORT).show();
if(mqtt_server!=null||mqtt_id!=null||mqtt_port!=null){
try {
String payload = "rssi:"+RSSI+"mac:"+device.getAddress();
client.publish("test",payload.getBytes(),0,false);
} catch ( MqttException e) {
e.printStackTrace();
}}
}else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
}else if(BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)){
}
}
};
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case REQUEST_ACCESS_COARSE_LOCATION:
if(grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
Toast.makeText(this,"ALLOWED", Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(this,"Forbidden",Toast.LENGTH_SHORT).show();
} break;
}
}
}
mqttActivity.java
package com.example.mqtt_active;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
public class MqttActivity extends AppCompatActivity {
private EditText server,port,id;
private Button save;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mqtt);
server = findViewById(R.id.serverMQTT);
id = findViewById(R.id.mqttTopic);
port = findViewById(R.id.mqttPort);
save = findViewById(R.id.saveButton);
save.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
MainActivity.mqtt_id = id.getText().toString();
MainActivity.mqtt_port = port.getText().toString();
MainActivity.mqtt_server = server.getText().toString();
startActivity(new Intent(MqttActivity.this,MainActivity.class));
}
});
}
}
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:orientation="vertical"
tools:context=".MainActivity">
<Button
android:id="#+id/turnon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Turn On"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.452" />
<Button
android:id="#+id/mqttSet"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Set MQTT"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.511"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/turnon"
app:layout_constraintVertical_bias="0.073" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="52dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.524"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/mqttSet"
app:layout_constraintVertical_bias="0.0" />
</androidx.constraintlayout.widget.ConstraintLayout>
activity_mqtt.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">
<EditText
android:id="#+id/serverMQTT"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName"
android:text="Server"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="60dp"
android:text="MQTT SERVER"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:text="MQTT TOPIC"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/serverMQTT" />
<EditText
android:id="#+id/mqttTopic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName"
android:text="Topic"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView2" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:text="MQTT PORT"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/mqttTopic" />
<EditText
android:id="#+id/mqttPort"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName"
android:text="Port"
app:layout_constraintBottom_toTopOf="#+id/saveButton"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView3"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="#+id/saveButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save"
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="#+id/textView3"
app:layout_constraintVertical_bias="0.298" />
</androidx.constraintlayout.widget.ConstraintLayout>
How to increase speed of scanning nearby BLE? i expect from this forum, i can increase speed of scanning nearby BLE.

Problem in translation display in translation app on android studio

Hello eveyone i hope you are all doing good. I have a little problem and I couldn't find the solution. I have a translation app and after the user input his phrase by a record, the translation message doesn't appear. So I hope that someone could help me.
Here is my xml file:
<?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"
tools:context=".MainActivity">
<EditText
android:id="#+id/edittext"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:hint="Tap Mic to Speak"
android:padding="20dp"
android:textColor="#000000"
android:textSize="20sp" />
<Button
android:id="#+id/idBtnTranslateLanguage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/TransledText"
android:layout_centerInParent="true"
android:text="Translate language" />
<ImageButton
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/edittext"
android:layout_centerHorizontal="true"
android:layout_marginTop="128dp"
android:background="#color/white"
android:padding="40dp"
android:src="#drawable/ic_baseline_mic_24" />
<TextView
android:id="#+id/TransledText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/edittext"
android:layout_centerHorizontal="true"
android:layout_margin="20dp"
android:gravity="center_horizontal"
android:text="Translated language"
android:textAlignment="center"
android:textSize="20sp"
tools:ignore="UnknownId" />
</RelativeLayout>
And my main code:
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Locale;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.ml.common.modeldownload.FirebaseModelDownloadConditions;
import com.google.firebase.ml.naturallanguage.FirebaseNaturalLanguage;
import com.google.firebase.ml.naturallanguage.translate.FirebaseTranslateLanguage;
import com.google.firebase.ml.naturallanguage.translate.FirebaseTranslator;
import com.google.firebase.ml.naturallanguage.translate.FirebaseTranslatorOptions;
public class MainActivity extends AppCompatActivity {
private static final int CodeSpeechInput =100;
private TextView EditText;
private ImageButton SpeakButton;
private TextView TransledText;
FirebaseTranslator englishFrenshTranslator;
private Button translateLanguageBtn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FirebaseTranslatorOptions options =
new FirebaseTranslatorOptions.Builder()
.setSourceLanguage(FirebaseTranslateLanguage.EN)
.setTargetLanguage(FirebaseTranslateLanguage.FR)
.build();
englishFrenshTranslator = FirebaseNaturalLanguage.getInstance().getTranslator(options);
EditText = (TextView) findViewById(R.id.edittext);
SpeakButton = (ImageButton) findViewById(R.id.button);
TransledText = (TextView) findViewById(R.id.TransledText);
translateLanguageBtn = findViewById(R.id.idBtnTranslateLanguage);
translateLanguageBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String string = EditText.getText().toString();
downloadModal(string);
}
private void downloadModal(String input) {
FirebaseModelDownloadConditions conditions = new FirebaseModelDownloadConditions.Builder().requireWifi().build();
englishFrenshTranslator.downloadModelIfNeeded(conditions).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
// this method is called when modal is downloaded successfully.
Toast.makeText(MainActivity.this, "Please wait language modal is being downloaded.", Toast.LENGTH_SHORT).show();
// calling method to translate our entered text.
translateLanguage(input);
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(MainActivity.this, "Fail to download modal", Toast.LENGTH_SHORT).show();
}
});
}
private void translateLanguage(String input) {
englishFrenshTranslator.translate(input).addOnSuccessListener(new OnSuccessListener<String>() {
#Override
public void onSuccess(String result) {
TransledText.setText(input);
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(MainActivity.this, "Fail to translate", Toast.LENGTH_SHORT).show();
}
});
}
});
SpeakButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startVoiceInput();
}
private void startVoiceInput() {
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
try {
startActivityForResult(intent, CodeSpeechInput);
} catch (ActivityNotFoundException a) {
}
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case CodeSpeechInput : {
if (resultCode == RESULT_OK && null != data) {
ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
EditText.setText(result.get(0));
}
break;
}
}
}
}
I also use firebase if that could help you.

How to fix activity not showing when run

I am creating a chat app in which you can create groups. to create groups I have created a new activity. it shows up in preview but won't show up when I run the app and open the activity. I tried on another phone and only the CircleImageView showed up. but it's OnClickListner won't work. there are no errors while compiling, logging or debbugging.
I have even tried breakpoints to check the error, but no output. Exept for the ad shows up. tried changing layouts but nothing shows up.
I don't know the error so I am pasting the CreateGroupActivity.java file as well as activity_create_group.xml
CreateGroupActivity.java:
package com.satyamedh.chitchatmessenger;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.MobileAds;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.theartofdev.edmodo.cropper.CropImage;
import com.theartofdev.edmodo.cropper.CropImageView;
import de.hdodenhof.circleimageview.CircleImageView;
public class CreateGroupActivity extends AppCompatActivity
{
private CircleImageView circleImageView;
private EditText editText;
private Button buttonconf, buttoncanc;
private final static int chosenProfileImage = 1;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_group);
initializeFields();
buttoncanc.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent profileIntent = new Intent(CreateGroupActivity.this, MainActivity.class);
startActivity(profileIntent);
}
});
buttonconf.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (TextUtils.isEmpty(editText.getText())){
Toast.makeText(CreateGroupActivity.this, "Please enter text..", Toast.LENGTH_SHORT).show();
}
}
});
circleImageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent galleryIntent = new Intent();
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
startActivityForResult(galleryIntent, chosenProfileImage);
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == chosenProfileImage && resultCode == RESULT_OK && data != null)
{
Uri imageUri = data.getData();
CropImage
.activity()
.setGuidelines(CropImageView.Guidelines.ON)
.start(this);
}
if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE)
{
final CropImage.ActivityResult result = CropImage.getActivityResult(data);
if(resultCode == RESULT_OK) {
assert result != null;
Uri resultUri = result.getUri();
DatabaseReference rootref = FirebaseDatabase.getInstance().getReference();
Intent settingsIntent = new Intent(CreateGroupActivity.this, chooseUserActivity.class);
String key = rootref.push().getKey();
settingsIntent.putExtra("groupKey", key);
settingsIntent.putExtra("groupImage", resultUri);
settingsIntent.putExtra("groupName", editText.getText().toString());
startActivity(settingsIntent);
}
}
}
private void initializeFields()
{
MobileAds.initialize(this, "ca-app-pub-3127817354023186~6842500243");
final AdView mAdView;
mAdView = findViewById(R.id.my_adView_createGroup);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
mAdView.setAdListener(new AdListener() {
#Override
public void onAdLoaded() {
// Code to be executed when an ad finishes loading.
}
#Override
public void onAdFailedToLoad(int errorCode) {
// Code to be executed when an ad request fails.
}
#Override
public void onAdOpened() {
// Code to be executed when an ad opens an overlay that
// covers the screen.
}
#Override
public void onAdClicked() {
// Code to be executed when the user clicks on an ad.
}
#Override
public void onAdLeftApplication() {
// Code to be executed when the user has left the app.
}
#Override
public void onAdClosed() {
// Code to be executed when the user is about to return
// to the app after tapping on an ad.
}
});
circleImageView = findViewById(R.id.create_group_image);
editText = findViewById(R.id.create_group_name);
buttonconf = findViewById(R.id.confirm_button);
buttoncanc = findViewById(R.id.cancel_button);
}
}
activity_create_group.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=".CreateGroupActivity">
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="51dp"
android:layout_marginTop="87dp"
android:layout_marginEnd="259dp"
android:layout_marginBottom="551dp"
android:src="#drawable/profile_image"
android:id="#+id/create_group_image"/>
<EditText
android:layout_width="250dp"
android:layout_height="50dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="167dp"
android:layout_marginTop="88dp"
android:layout_marginEnd="4dp"
android:layout_marginBottom="596dp"
android:background="#drawable/inputs"
android:id="#+id/create_group_name"
android:inputType="text"
android:hint="Group name here"/>
<Button
android:id="#+id/confirm_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="168dp"
android:layout_marginTop="141dp"
android:layout_marginEnd="156dp"
android:layout_marginBottom="542dp"
android:text="Confirm"
android:background="#drawable/buttons"/>
<Button
android:id="#+id/cancel_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="263dp"
android:layout_marginTop="140dp"
android:layout_marginEnd="60dp"
android:layout_marginBottom="546dp"
android:text="Cancel"
android:background="#drawable/buttons"/>
<com.google.android.gms.ads.AdView
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id="#+id/my_adView_createGroup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
ads:adSize="SMART_BANNER"
ads:adUnitId="ca-app-pub-3940256099942544/6300978111">
</com.google.android.gms.ads.AdView>
</RelativeLayout>
android phone(redmi 2) screenshot:
https://drive.google.com/file/d/18MMzLvcdIi8iLog1nR_NrJPcJf-NZG51/view?usp=sharing
pc android studio screenshot:
https://drive.google.com/file/d/1E3Suy967AS3aQS9TEkUlAh5kPjWr86u-/view?usp=sharing
I am newbie to stackoverflow so I can't attach images. sorry.
no errors also.

it's normal because you used so much alignment value and attribute which made your layout not responsive , please use the xml below and don't forget to add the image:src and background you wanted
<?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=".CreateGroupActivity">
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_margin="20dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:id="#+id/create_group_image"/>
<EditText
android:layout_toRightOf="#id/create_group_image"
android:layout_width="250dp"
android:layout_marginTop="20dp"
android:layout_height="wrap_content"
android:id="#+id/create_group_name"
android:inputType="text"
android:hint="Group name here"/>
<Button
android:layout_below="#id/create_group_name"
android:layout_toRightOf="#id/create_group_image"
android:id="#+id/confirm_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Confirm"/>
<Button
android:layout_below="#id/create_group_name"
android:layout_toRightOf="#id/confirm_button"
android:id="#+id/cancel_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Cancel"/>
<com.google.android.gms.ads.AdView
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id="#+id/my_adView_createGroup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
ads:adSize="SMART_BANNER"
ads:adUnitId="ca-app-pub-3940256099942544/6300978111">
</com.google.android.gms.ads.AdView>
</RelativeLayout>