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how can i change imagebuttons automatically after what users want?

I making an app which you can use to start other apps like Netflix on. I have four imagebuttons on the first XML file which is going to be the "Favorites". When you click on any of these imagebuttons you start the intent for the app you wanted to start. Then the app gets opened. How can I make it so that the Favorites changes automatically after what the user uses.
Here is my Java Code:
package com.carlo_projekt.tvprograms;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.speech.RecognizerIntent;
import android.speech.tts.TextToSpeech;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Locale;
' public class MainActivity extends AppCompatActivity {
ImageButton speakBtn;
Button CategoriesBtn;
TextView text;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
speakBtn = (ImageButton) findViewById(R.id.SpeakImageBtn);
CategoriesBtn = (Button) findViewById(R.id.CategoriesBtn);
text = (TextView) findViewById(R.id.textView);
}
public void OpenGame(View view) {
Intent intent = new Intent(this, MoreActivity.class);
startActivity(intent);
}
public void Speak(View view)
{
Intent recognizeIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
recognizeIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
recognizeIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "en-US");
recognizeIntent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Hi! Which app do you want to start?");
try {
startActivityForResult(recognizeIntent, 1);
}
catch (ActivityNotFoundException a)
{
Toast.makeText(MainActivity.this, "Sorry! Your device doesn't support this function!", Toast.LENGTH_LONG).show();
}
}
public void onActivityResult(int request_Code, int result_Code, Intent recognizeIntent)
{
super.onActivityResult(request_Code, result_Code, recognizeIntent);
switch (request_Code)
{
case 1: if(result_Code == RESULT_OK && recognizeIntent != null)
{
ArrayList<String> result = recognizeIntent.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
for(int i = 0; i<result.size(); i++)
{
result.set(i, result.get(i).toLowerCase());
if(result.get(i).compareTo("start netflix") == 0)
{
Intent NetflixIntent = getPackageManager().getLaunchIntentForPackage("com.netflix.mediaclient");
startActivity(NetflixIntent);
}
else if(result.get(i).compareTo("start youtube") == 0)
{
Intent NetflixIntent = getPackageManager().getLaunchIntentForPackage("com.google.android.youtube");
startActivity(NetflixIntent);
}
else if(result.get(i).compareTo("start viafree") == 0)
{
Intent NetflixIntent = getPackageManager().getLaunchIntentForPackage("se.viafree.android");
startActivity(NetflixIntent);
}
else if(result.get(i).compareTo("start tvfour") == 0)
{
Intent NetflixIntent = getPackageManager().getLaunchIntentForPackage("se.tv4.tv4playtab");
startActivity(NetflixIntent);
}
else if(result.get(i).compareTo("start dplay") == 0)
{
Intent NetflixIntent = getPackageManager().getLaunchIntentForPackage("se.kanal5play");
startActivity(NetflixIntent);
}
else if(result.get(i).compareTo("start viaplay") == 0)
{
Intent NetflixIntent = getPackageManager().getLaunchIntentForPackage("com.viaplay.android");
startActivity(NetflixIntent);
}
else if(result.get(i).compareTo("start svtplay") == 0)
{
Intent NetflixIntent = getPackageManager().getLaunchIntentForPackage("se.svt.android.svtplay");
startActivity(NetflixIntent);
}
/**text.setText(result.get(i));*/
}
}
}
}
public void OpenApps(String packageName)
{
if(getPackageManager().getLaunchIntentForPackage(packageName) != null)
{
Intent tv4PlayIntent = getPackageManager().getLaunchIntentForPackage(packageName);
startActivity(tv4PlayIntent);
}
else
{
String marketAppPackageName = "market://details?id="+ packageName;
MessageBox(marketAppPackageName);
}
}
public void NetflixFunction(View view)
{
String netflixPackageName = new String("com.netflix.mediaclient");
OpenApps(netflixPackageName);
}
public void ViafreeFunction(View view)
{
String viafreePackageName = new String("se.viafree.android");
OpenApps(viafreePackageName);
}
public void YoutubeFunction(View view)
{
String youtubePackageName = new String("com.google.android.youtube");
OpenApps(youtubePackageName);
}
public void Tv4PlayFunction(View view)
{
String tv4playPackageName = new String("se.tv4.tv4playtab");
OpenApps(tv4playPackageName);
}
public void LayoutsShow(View view)
{
RelativeLayout layoutShow = findViewById(R.id.LayoutShow);
if (layoutShow.getVisibility() == View.GONE) {
layoutShow.setVisibility(View.VISIBLE);
}
else if (layoutShow.getVisibility() == View.VISIBLE) {
layoutShow.setVisibility(View.GONE);
}
}
public void MessageBox(final String uriIntent)
{
AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Couldn't find this app");
String messageText = "We cant find this app, do you want to download it?";
alertDialog.setMessage(messageText);
alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, "Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent MarketIntent = new Intent(Intent.ACTION_VIEW);
MarketIntent.setData(Uri.parse(uriIntent));
startActivity(MarketIntent);
dialog.dismiss();
}
});
alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.show();
}}
This is my XML Code:
<?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"
android:background="#color/backgroundColor"
tools:context="com.carlo_projekt.tvprograms.MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:ignore="MissingConstraints"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp">
<Button
android:id="#+id/CategoriesBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="56dp"
android:background="#drawable/round_corners"
android:onClick="OpenGame"
android:text="Categories"
android:textAllCaps="false" />
<ImageButton
android:id="#+id/NetflixImageBtn"
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_centerVertical="true"
android:layout_toStartOf="#+id/CategoriesBtn"
android:onClick="NetflixFunction"
app:srcCompat="#drawable/netflix" />
<ImageButton
android:id="#+id/YoutubeImageBtn"
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_alignTop="#+id/NetflixImageBtn"
android:layout_toEndOf="#+id/CategoriesBtn"
android:onClick="YoutubeFunction"
app:srcCompat="#drawable/youtube" />
<ImageButton
android:id="#+id/ViafreeImageBtn"
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_alignStart="#+id/NetflixImageBtn"
android:layout_below="#+id/NetflixImageBtn"
android:layout_marginTop="52dp"
android:onClick="ViafreeFunction"
app:srcCompat="#drawable/viafree" />
<ImageButton
android:id="#+id/Tv4PlayImageBtn"
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_alignEnd="#+id/YoutubeImageBtn"
android:layout_alignTop="#+id/ViafreeImageBtn"
android:onClick="Tv4PlayFunction"
app:srcCompat="#drawable/tv4" />
<ImageButton
android:id="#+id/SpeakImageBtn"
android:layout_width="40dp"
android:layout_height="60dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:onClick="Speak"
app:srcCompat="#drawable/microphone" />
<ImageButton
android:id="#+id/imageButton19"
android:layout_width="40dp"
android:layout_height="20dp"
android:layout_alignParentEnd="true"
app:srcCompat="#drawable/sweden" />
<ImageButton
android:id="#+id/imageButton24"
android:layout_width="40dp"
android:layout_height="20dp"
android:layout_alignParentEnd="true"
android:layout_below="#+id/imageButton19"
app:srcCompat="#drawable/great_britain" />
<ImageButton
android:id="#+id/imageButton22"
android:layout_width="40dp"
android:layout_height="20dp"
android:layout_alignParentEnd="true"
android:layout_below="#+id/imageButton24"
app:srcCompat="#drawable/germany" />
<ImageButton
android:id="#+id/imageButton23"
android:layout_width="40dp"
android:layout_height="20dp"
android:layout_alignParentEnd="true"
android:layout_below="#+id/imageButton22"
app:srcCompat="#drawable/france" />
<ImageButton
android:id="#+id/imageButton25"
android:layout_width="40dp"
android:layout_height="20dp"
android:layout_alignParentEnd="true"
android:layout_below="#+id/imageButton23"
app:srcCompat="#drawable/spanish" />
<TextView
android:id="#+id/textView"
android:layout_width="193dp"
android:layout_height="33dp"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_marginBottom="217dp"
android:layout_marginEnd="90dp"
android:text="TextView"
android:textColor="#ff00" />
</RelativeLayout>
</android.support.constraint.ConstraintLayout>
`
I'm pretty new with stack overflow so I hope you understand what I'm trying to do.

Get SharedPreferences object:
SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
Create a click listener that will update the click count for the appropriate button:
View.OnClickListener myClickListener= new View.OnClickListener() {
public void onClick(View v) {
String tag = (String) v.getTag();
sharedPref
.edit()
.putInt(tag, shardPref.getInteger(tag) + 1)
.apply();
}
};
Now for each of your buttons, you will want to set both the click listener and a tag for naming purposes:
Button btn = findViewById(R.id.NetflixImageBtn);
btn.setTag("netflix");
btn.setOnClickListener(myClickListener);
Now when you click a button, it will increment the count associated with the tag. You can use that information however you wish.

Unable to make EditText multi-line

I am making an Android app for storing notes. I have made my editText behave like textView before button click. Clicking on edit button makes the editText take value. Now problem arises when i save that value and when it is displayed. EditText doesnt come in multi-line as I want but in a single line.
I declared the inputType property of editText as multi-line in xml file but in the code upon initialising the editText i set its inputType property as null in an attempt to make it both null and multi-line but alas! It doesn't happen.
Below is my xml and java code:
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"
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:theme="#style/AppTheme.AppBarOverlay"
android:background="#color/colorToolBar"
android:id="#+id/idToolbarNoteDetails"
android:padding="10dp"/>
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:id="#+id/idFloatingActionButtonEdit"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
app:srcCompat="#android:drawable/ic_menu_edit"
android:layout_margin="20dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Colors: "
android:textStyle="italic"
android:visibility="invisible"
android:id="#+id/idTextViewColors"
android:layout_below="#+id/idToolbarNoteDetails"
android:layout_margin="10dp"
android:textSize="15dp"/>
<TextView
android:layout_width="25dp"
android:layout_height="25dp"
android:id="#+id/idColorRed"
android:visibility="invisible"
android:layout_margin="10dp"
android:layout_below="#+id/idToolbarNoteDetails"
android:layout_toRightOf="#+id/idTextViewColors"
android:background="#drawable/textview_circle_red" />
<TextView
android:layout_width="25dp"
android:layout_height="25dp"
android:visibility="invisible"
android:id="#+id/idColorBlue"
android:layout_margin="10dp"
android:layout_below="#id/idToolbarNoteDetails"
android:layout_toRightOf="#+id/idColorRed"
android:background="#drawable/textview_circle_blue"/>
<TextView
android:layout_width="25dp"
android:layout_height="25dp"
android:id="#+id/idColorGreen"
android:visibility="invisible"
android:layout_margin="10dp"
android:layout_below="#id/idToolbarNoteDetails"
android:layout_toRightOf="#+id/idColorBlue"
android:background="#drawable/textview_circle_green"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/idTextViewColors"
android:layout_margin="10dp"
android:inputType="textShortMessage"
android:background="#android:color/transparent"
android:textSize="40sp"
android:hint="Title"
android:textStyle="bold"
android:id="#+id/idEditTextTitle"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/idEditTextTitle"
android:hint="Content"
android:inputType="textMultiLine"
android:lines="5"
android:gravity="top|left"
android:layout_margin="10dp"
android:textSize="20sp"
android:background="#android:color/transparent"
android:id="#+id/idEditTextContent"/>
<EditText
android:layout_width="250dp"
android:id="#+id/idEditTextTag"
android:layout_height="35dp"
android:hint="#TAG"
android:background="#android:color/transparent"
android:layout_alignParentBottom="true"
android:textSize="15dp"
android:textStyle="italic"
android:layout_margin="10dp"/>
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:id="#+id/idFloatingActionButtonSave"
android:layout_above="#+id/idFloatingActionButtonEdit"
android:layout_margin="20dp"
android:visibility="invisible"
app:srcCompat="#android:drawable/ic_menu_save"
android:layout_alignParentRight="true"/>
JAVA
package mynotes.pawanjotsingh.com.mynotes.activities;
import android.content.Intent;
import android.graphics.Color;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.text.InputType;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import mynotes.pawanjotsingh.com.mynotes.R;
import mynotes.pawanjotsingh.com.mynotes.adapters.RecyclerAdapter;
import mynotes.pawanjotsingh.com.mynotes.dbhelper.DataBaseHelper;
import mynotes.pawanjotsingh.com.mynotes.models.NoteModel;
public class NoteDetailsActivity extends AppCompatActivity {
enum Colors{RED, BLUE, GREEN, WHITE}
DataBaseHelper dataBaseHelper;
FloatingActionButton floatingActionButtonEdit,floatingActionButtonSave;
EditText editTextTitle,editTextContent,editTextTag;
String stringTitle,stringContent,stringTag;
TextView textViewColors,textViewRed,textViewBlue,textViewGreen;
Toolbar toolbar;
int color,colorRed,colorBlue,colorGreen;
String id="";
Colors currentBackgroundColour = Colors.WHITE;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_note_details);
editTextTitle=(EditText) findViewById(R.id.idEditTextTitle);
editTextTitle.setInputType(InputType.TYPE_NULL);
editTextContent=(EditText) findViewById(R.id.idEditTextContent);
editTextContent.setInputType(InputType.TYPE_NULL);
editTextTag=(EditText) findViewById(R.id.idEditTextTag);
editTextTag.setInputType(InputType.TYPE_NULL);
toolbar=(Toolbar) findViewById(R.id.idToolbarNoteDetails);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("Edit");
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
onBackPressed();
}
});
dataBaseHelper=new DataBaseHelper(this);
textViewColors=(TextView) findViewById(R.id.idTextViewColors);
textViewRed=(TextView) findViewById(R.id.idColorRed);
textViewBlue=(TextView) findViewById(R.id.idColorBlue);
textViewGreen=(TextView) findViewById(R.id.idColorGreen);
colorRed=Color.parseColor("#FE7676");
colorBlue=Color.parseColor("#76FEEC");
colorGreen=Color.parseColor("#99FE76");
stringTitle=getIntent().getStringExtra("text_title");
stringContent=getIntent().getStringExtra("text_content");
stringTag=getIntent().getStringExtra("text_tag");
id = getIntent().getStringExtra("id");
color=getIntent().getIntExtra("color", Color.WHITE);
getWindow().getDecorView().setBackgroundColor(color);
editTextTitle.setText(stringTitle);
editTextContent.setText(stringContent);
editTextTag.setText(stringTag);
floatingActionButtonSave=(FloatingActionButton) findViewById(R.id.idFloatingActionButtonSave);
floatingActionButtonSave.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
save();
}
});
floatingActionButtonEdit=(FloatingActionButton) findViewById(R.id.idFloatingActionButtonEdit);
floatingActionButtonEdit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
floatingActionButtonSave.setVisibility(View.VISIBLE);
Animation animationLeft=AnimationUtils.loadAnimation(getApplicationContext(),R.anim.move_left);
floatingActionButtonSave.startAnimation(animationLeft);
textViewColors.setVisibility(View.VISIBLE);
Animation animationDown= AnimationUtils.loadAnimation(getApplicationContext(),R.anim.move_down);
textViewColors.startAnimation(animationDown);
textViewRed.setVisibility(View.VISIBLE);
textViewRed.startAnimation(animationDown);
textViewBlue.setVisibility(View.VISIBLE);
textViewBlue.startAnimation(animationDown);
textViewGreen.setVisibility(View.VISIBLE);
textViewGreen.startAnimation(animationDown);
editNote();
}
});
textViewRed.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
currentBackgroundColour=Colors.RED;
getWindow().getDecorView().setBackgroundColor(Color.parseColor("#FE7676"));
}
});
textViewBlue.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
currentBackgroundColour=Colors.BLUE;
getWindow().getDecorView().setBackgroundColor(Color.parseColor("#76FEEC"));
}
});
textViewGreen.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
currentBackgroundColour = Colors.GREEN;
getWindow().getDecorView().setBackgroundColor(Color.parseColor("#99FE76"));
}
});
}
#Override
public void onBackPressed() {
Intent intent=new Intent(this,MainActivity.class);
startActivity(intent);
}
public void editNote(){
editTextTitle.setInputType(InputType.TYPE_CLASS_TEXT);
editTextTitle.setFocusable(true);
editTextTitle.requestFocus();
editTextContent.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_MULTI_LINE);
editTextTag.setInputType(InputType.TYPE_CLASS_TEXT);
}
public void save() {
int colour=Color.WHITE;
switch (currentBackgroundColour){
case RED:
colour = colorRed;
break;
case BLUE:
colour = colorBlue;
break;
case GREEN:
colour = colorGreen;
break;
}
final NoteModel noteModel = new NoteModel();
noteModel.setTitle(editTextTitle.getText().toString());
noteModel.setContent(editTextContent.getText().toString());
noteModel.setTag(editTextTag.getText().toString());
noteModel.setId(id);
noteModel.setDate(getDateTime());
noteModel.setColor(colour);
boolean isModified=dataBaseHelper.editNote(noteModel);
if(isModified==true){
Toast.makeText(this, "Modifications saved", Toast.LENGTH_SHORT).show();
finish();
}
else Toast.makeText(this, "Unable to save modifications", Toast.LENGTH_SHORT).show();
}
private String getDateTime() {
SimpleDateFormat dateFormat = new SimpleDateFormat(
"dd-MM-yyyy HH:mm:ss", Locale.getDefault());
Date date = new Date();
return dateFormat.format(date);
}
Links to screenshots
This image is when I click edit button. This works just fine, text goes to another line.
This image is when i click the save button. The text goes back to single line instead of multi-line.

Okay so, I knew that the problem arises when I click on the edit button. Clicking the button made the editText single lined automatically even though I had mentioned the InputType as Multi-line in XML very clearly.
What I did to make the editText multi-line after the button click is that I wrote editTextContent.setSingleLine(false); in my java file inside the onClick button code.
And that is it. :)

XML files contain code, but preview is blank

so i have a project where im implementing a google sign in, i followed this tutorial on how to do that, but when i did, all my XML files appear blank. i made changes to the original MainActivity.java and the activity_main.xml file. i woudl think that only the activity_main.xml would be affected, but all of my XML files appear blank. when i try to run the app, i get
"Error:Content is not allowed in prolog.
" and
"Execution failed for task '.app:builderInfoDebugLoader'"
this is my activity main where i implement the google sign in:
package com.example.mayankthakur.personalprojecttrial2;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.signin.GoogleSignInResult;
import com.google.android.gms.auth.api.signin.SignInAccount;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
import org.w3c.dom.Text;
public class MainActivity extends AppCompatActivity implements View.OnClickListener, GoogleApiClient.OnConnectionFailedListener {
private LinearLayout prof_section;
private Button SignOut;
private SignInButton SignIn;
private TextView Name,Email;
private ImageView Prof_Picture;
private Button continueBut;
private static final int REQ_CODE = 9001;
String name;
Intent nameSave;
private GoogleApiClient mGoogleApiClient;
public static final String prefsName = "com.example.mayankthakur.personalprojecttrial2";
private static final String TAG = "MainActivity";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
prof_section = (LinearLayout) findViewById(R.id.prof_section);
SignOut = (Button) findViewById(R.id.logoutBtn);
SignIn = (SignInButton) findViewById(R.id.gSignIn);
Name = (TextView) findViewById(R.id.nameSpace);
Email = (TextView) findViewById(R.id.emailSpace);
Prof_Picture = (ImageView) findViewById(R.id.profilePicture);
continueBut = (Button) findViewById(R.id.button2);
continueBut.setOnClickListener(this);
SignOut.setOnClickListener(this);
SignIn.setOnClickListener(this) ;
prof_section.setVisibility(View.GONE);
continueBut.setVisibility(View.GONE);
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestEmail()
.build();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.enableAutoManage(this, this)
.addApi(Auth.GOOGLE_SIGN_IN_API, gso)
.build();
}
#Override
public void onClick (View v) {
switch (v.getId()) {
case R.id.gSignIn:
signIn();
break;
case R.id.logoutBtn:
signOut();
break;
/*// This is the shared preference
SharedPreferences.Editor prefs = getSharedPreferences(prefsName, MODE_PRIVATE).edit();
//adding a value to the preference
prefs.putString("name", name);
prefs.apply();
nameSave = new Intent(MainActivity.this, Activity2.class);
MainActivity.this.startActivity(nameSave);
*/
}
}
#Override
public void onConnectionFailed (#NonNull ConnectionResult connectionResult){
}
private void signIn() {
Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
startActivityForResult(signInIntent, REQ_CODE );
}
private void signOut(){
Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(new ResultCallback<Status>() {
#Override
public void onResult(#NonNull Status status) {
updateUI(false);
}
});
}
private void handleReuslt(GoogleSignInResult result){
if(result.isSuccess())
{
GoogleSignInAccount acct = result.getSignInAccount();
String personName = acct.getDisplayName();
String personEmail = acct.getEmail();
String imgUrl = acct.getPhotoUrl().toString();
String personId = acct.getId();
Uri personPhoto = acct.getPhotoUrl();
Name.setText(personName);
Email.setText(personEmail);
Glide.with(this).load(imgUrl).into(Prof_Picture);
updateUI(true);
}
else
{
updateUI(false);
}
}
private void updateUI(boolean isLogin){
if(isLogin)
{
prof_section.setVisibility(View.VISIBLE);
SignIn.setVisibility(View.GONE);
}
else
{
prof_section.setVisibility(View.GONE);
SignIn.setVisibility(View.VISIBLE);
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == REQ_CODE)
{
GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
handleReuslt(result);
}
}
}
this is my XML file where i added the buttons and stuff for the google sign in:\
<?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:id="#+id/activity_main"
android:orientation="vertical"
tools:context="com.example.mayankthakur.personalprojecttrial2.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:id="#+id/prof_section"
android:layout_marginLeft="20dp"
android:layout_marginTop = "50dp"
android:weightSum="1">
<ImageView
android:id="#+id/profilePicture"
android:layout_width="90dp"
android:layout_height="100dp"
android:layout_marginRight="20dp"
android:layout_marginTop="20dp"
android:src="#drawable/photo"
android:layout_weight="0.25" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginLeft="28dp"
android:layout_marginTop="20dp">
<TextView
android:id="#+id/nameSpace"
android:layout_width="166dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center_horizontal"
android:text="Name Display"
android:textSize="20dp"
android:textStyle="bold" />
<TextView
android:id="#+id/emailSpace"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="Email Display"
android:textSize="14dp"
android:textStyle="bold" />
<Button
android:id="#+id/logoutBtn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Logout" />
</LinearLayout>
</LinearLayout>
<com.google.android.gms.common.SignInButton
android:id="#+id/gSignIn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:layout_marginTop="60dp">
</com.google.android.gms.common.SignInButton>
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Please Sign in in order to make use of all of the features of the app"
android:textAlignment="center"
android:textSize="20dp"
android:layout_marginTop="30dp"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"/>
<Button
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Continue"
android:layout_marginRight="50dp"
android:layout_marginLeft="50dp"
android:layout_marginTop="50dp"/>
</LinearLayout>
any help would be greatly appreciated, and if any of you require any more code please do ask
thanks in advance!

I am trying to implement a camera feature onto my application but "app wont run"

So I have a functional application that has many pages and this is the registration 2 page that is supposed to open a standard android camera and then store it using the code at the bottom of the registration java page.
Here is my code:
package com.example.mockups;
import android.graphics.drawable.Drawable;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageView;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Button;
import java.io.File;
public class Register2 extends AppCompatActivity {
Button button;
ImageView imageView;
static final int CAM_REQUEST = 1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register2);
button = (Button) findViewById(R.id.buttonContinue);
imageView = (ImageView) findViewById(R.id.imageView);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent camera_intent = new Intent (MediaStore.ACTION_IMAGE_CAPTURE);
File file = getFile();
camera_intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri. fromFile(file));
startActivityForResult(camera_intent, CAM_REQUEST);
}
});
}
private File getFile()
{
File folder = new File("sdcard/camera");
if (!folder.exists())
{
folder.mkdir();
}
File image_file = new File(folder, "cam_image.jpg");
return image_file;
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
String path = "sdcard/camera/cam_image.jpg";
imageView.setImageDrawable(Drawable.createFromPath(path));
}
}
_________________________________
<?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:id="#+id/activity_register2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.strongholdmockups.Register2">
<TextView
android:text="Build Profile"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/buildProTitle"
android:textAppearance="#style/TextAppearance.AppCompat.Display1"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<TextView
android:text="Upload Profile Picture:"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="33dp"
android:id="#+id/textView46"
android:textAppearance="#style/TextAppearance.AppCompat.Body1"
android:layout_below="#+id/buildProTitle"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="36dp"
android:layout_marginStart="36dp" />
<Button
android:text="Upload from Camera Roll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="21dp"
android:id="#+id/buttonContinue"
style="#android:style/Widget.Holo.Light.Button"
android:layout_below="#+id/textView46"
android:layout_alignRight="#+id/buildProTitle"
android:layout_alignEnd="#+id/buildProTitle" />
<ImageView
android:id="#+id/image_view"
android:layout_width="350dp"
android:layout_height="250dp"
android:layout_above="#+id/continueBtn1"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_gravity="center_horizontal" />
<Button
android:text="Continue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="23dp"
android:layout_marginEnd="23dp"
android:layout_marginBottom="14dp"
android:id="#+id/continueBtn1"
style="#style/Widget.AppCompat.Button.Borderless.Colored"
android:background="#color/cardview_light_background"
android:textAppearance="#style/TextAppearance.AppCompat.Headline"
android:layout_alignParentBottom="true"
android:layout_alignRight="#+id/image_view"
android:layout_alignEnd="#+id/image_view" />
</RelativeLayout>
__________________
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

You have to check if permissions are granted for API version >= 23. Add something like this to your code before using the camera/external storage.
if (Build.VERSION.SDK_INT >= 23) {
if (checkSelfPermission(android.Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
Log.v(TAG,"Permission is granted");
return true;
} else {
Log.v(TAG,"Permission is revoked");
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
return false;
}
}else { //permission is automatically granted on sdk<23 upon installation
Log.v(TAG,"Permission is granted");
return true;
}

How to add strings from editText to a listView

I have a MainActivity with a ListView and an add Button. When the user clicks the add Button it takes you to another activity the CreateActivity for you to enter in data or strings into the editText boxes. After that you click the create Button and it adds the strings to the ListView it shows up, but every time I try to add another item to the ListView it just overrides the first item and doesn't add on to the ListView.
MainActivity.java with listView and add button
package com.example.brian.inventoryapp;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static android.R.layout.simple_list_item_1;
public class MainActivity extends AppCompatActivity {
Button addButton;
ListView itemListView;
public static ArrayList<String> arrayList;
public static ArrayAdapter arrayAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Bundle editTextData = getIntent().getExtras();
if(editTextData != null){
itemListView = (ListView)findViewById(R.id.itemListView);
String data = editTextData.getString("data");
arrayList = new ArrayList<String>();
arrayList.add(data);
arrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, arrayList);
itemListView.setAdapter(arrayAdapter);
if(data != ""){
arrayAdapter.notifyDataSetChanged();
}
}
addButton = (Button) findViewById(R.id.addButton);
addButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, CreateActivity.class);
startActivity(intent);
}
});
}
}
activity_main xml with listView and add button
<?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:id="#+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.brian.inventoryapp.MainActivity"
android:weightSum="1">
<Button
android:text="Add"
android:layout_width="wrap_content"
android:layout_height="58dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:id="#+id/addButton" />
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/itemListView"
/>
</RelativeLayout>
CreateActivity.java with four editText boxes and create button
package com.example.brian.inventoryapp;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import static com.example.brian.inventoryapp.R.id.editTextItem;
public class CreateActivity extends AppCompatActivity {
EditText editTextItem;
EditText editTextModel;
EditText editTextSerial;
EditText editTextID;
Button createButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create);
getIntent();
editTextItem = (EditText)findViewById(R.id.editTextItem);
editTextModel = (EditText)findViewById(R.id.editTextModel);
editTextSerial = (EditText)findViewById(R.id.editTextSerial);
editTextID = (EditText)findViewById(R.id.editTextID);
createButton = (Button) findViewById(R.id.createButton);
createButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
String item = "";
item = editTextItem.getText().toString().trim() +
editTextModel.getText().toString().trim() +
editTextSerial.getText().toString().trim() +
editTextID.getText().toString().trim();
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.putExtra("data", item);
startActivity(intent);
}
});
}
}
activity_create xml with the four editText boxes and the create button
<?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:id="#+id/activity_create"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.brian.inventoryapp.CreateActivity">
<TextView
android:text="Item Name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="#+id/textView" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:layout_below="#+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="#+id/editTextItem" />
<TextView
android:text="Model Number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="18dp"
android:id="#+id/textView2"
android:layout_below="#+id/editTextItem"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:layout_below="#+id/textView2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="#+id/editTextModel" />
<TextView
android:text="Serial Number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/editTextModel"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="18dp"
android:id="#+id/textView3" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:layout_below="#+id/textView3"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="#+id/editTextSerial" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="#mipmap/ic_launcher"
android:layout_below="#+id/editTextID"
android:layout_centerHorizontal="true"
android:layout_marginTop="64dp"
android:id="#+id/imageButton" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="#+id/editTextID"
android:layout_below="#+id/editTextSerial"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="18dp" />
<TextView
android:text="ID Number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView4"
android:layout_below="#+id/editTextSerial"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:text="Create"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/createButton"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>

every time you restart the MainActivity, it is be created, the onCreate method was executed .one method you can use the comment method：use startactivityforResult;
you can read this question how to manage startactivityforResult.the second method is to set MainActivity model to SingleInstance.

You are starting MainActivity over and over again, clearing all data previously loaded.
Try this solution
Main activity:
package com.example.brian.inventoryapp;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static android.R.layout.simple_list_item_1;
public class MainActivity extends AppCompatActivity {
public static final int CREATE_REQUEST = 1;
private Button addButton;
private ListView itemListView;
private ArrayList<String> arrayList;
private ArrayAdapter<String> arrayAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
itemListView = (ListView) findViewById(R.id.itemListView);
addButton = (Button) findViewById(R.id.addButton);
arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arrayList);
itemListView.setAdapter(arrayAdapter);
addButton = (Button) findViewById(R.id.addButton);
addButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, CreateActivity.class);
startActivityForResult(intent, CREATE_REQUEST);
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CREATE_REQUEST) {
if (resultCode == RESULT_OK) {
String item = data.getStringExtra("data");
arrayList.add(item);
arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arrayList);
itemListView.setAdapter(arrayAdapter);
}
}
}
}
In your CreateActivity change createButton listener to this one:
createButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
String item = "";
item = editTextItem.getText().toString().trim() +
editTextModel.getText().toString().trim() +
editTextSerial.getText().toString().trim() +
editTextID.getText().toString().trim();
Intent intent = new Intent();
intent.putExtra("data", item);
setResult(RESULT_OK, intent);
finish();
}
});

Yes it will assume as if the MainActivity is started for the first time so you should use startActivityForResult() method instead of startActivity().This will continue your MainActivity and do not override your list View.