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Android Studio back button activity

I've been trying to find out the back navigation button to lead to another activity.
Every time when I pressed the back button, it goes to the previous activity which is not what I want. I would like to set the back button that goes to another activity I want, instead of previous one.
For example, I have Activity 1, 2 and 3. I was in Activity 2 and just moved to Activity 3. But when I press the back button, it goes automatically to the previous activity which is Activity 2. I want to make it to Activity 1 and not Activity 2. Can anyone suggest me a solution please?

You can make the button to go to a specific activity, instead of having the default behavior that you described.
It can be something like this:
#Override
public void onClick(View v) {
Intent intent = new Intent(Activity2.this, Activity3.class);
intent.putExtra("variable", information); //this is optional, but can be useful if you need to send a specific info to the next activity
startActivity(intent);
}

Activity 2 is parliamonar, and Activity 3 is federalparliamentary. I replaced parliamonar with Activity 1, but it still didn't solve the problem.
public class federalparliamentary extends AppCompatActivity {
Button federal;
private Object parliamonar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_federalparliamentary);
federal = findViewById(R.id.back160);
federal.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent reserve = new Intent(getApplicationContext(), parliamonar.class);
startActivity(reserve);
}
});
federal = findViewById(R.id.next164);
federal.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent reserve = new Intent(getApplicationContext(), sar.class);
startActivity(reserve);
}
});
}
public void onClick(View V) {
Intent back = new Intent((Context) parliamonar, federalparliamentary.class);
startActivity(back);
}
}

public class federalparliamentary extends AppCompatActivity {
Button federal;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_federalparliamentary);
federal = findViewById(R.id.back160);
federal.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent reserve = new Intent(getApplicationContext(), parliamonar.class);
startActivity(reserve);
}
});
federal = findViewById(R.id.next164);
federal.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent reserve = new Intent(getApplicationContext(), sar.class);
startActivity(reserve);
}
});
}
public void Onclick(View v) {
Intent intent = new Intent(federalparliamentary.this, politicalsystem.class);
startActivity(intent);
}
}
Activity 1 is "politicalsystem".
I added with #Override method, but it says that I have to remove the method, so I added outside, then it says that I have to extract interface, so clicked on it, then it gave me a bunch of list. So I chose onClick(v:View ):void, but it still didn't solve the issue. I tried in another way without #Override, but nothing changed when I tested my app. I also tried inside onCreate method which did not modified the navigation as I desired.

How to turn off music bgm(Background Music) from other java

I am making an app where bgm start from main page. But I couldn't find a way to turn it off when starts learning.
Can I remotely switch off bgm from different java file
This is my 1st java,mainmenu.class
public class mainmenu extends AppCompatActivity {
MediaPlayer bkgrdmsc;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mainmenu);
Button btn = (Button) findViewById(R.id.mula);
assert btn != null;
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent ke_belajar_latihan = new Intent(getApplicationContext(), taqi.mengaji.belajar_latihan.class);
startActivity(ke_belajar_latihan);
}
});
bkgrdmsc = MediaPlayer.create(this, R.raw.song);
bkgrdmsc.setLooping(true);
bkgrdmsc.start();
}
}
This is the other file I want to remotely off the bgm when starting the learning session(as student start to learn)
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.belajar_hija_baris);
Button btn=(Button) findViewById(R.id.hijaiyyah);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent ke_hijaiyah=new Intent(getApplicationContext(),taqi.mengaji.hijaiyyah.class);
startActivity(ke_hijaiyah);
}
});
}
I want R.id.hijaiyyah to navigate to learn xml also stop bgm
Please help I'm a newbie XD

Make an singleton class and add you music playing code into it for stopping and starting and use that singleton class in all your 2 activities for eg:
public class MusicManager {
private static MusicManager refrence = null;
public static MusicManager getInstance(){
if(refrence == null){
refrence = new MusicManager ();
}
return refrence;
}
}
Add a public method to this singleton class to start and stop music
public void initalizeMediaPlayer(Context context, int musicId){
// add initalization of media player in it and loop it
MediaPlayer bkgrdmsc;
bkgrdmsc = MediaPlayer.create(this, R.raw.song);
bkgrdmsc.setLooping(true);
}
public void startPlaying(){
bkgrdmsc.start();
}
public void stopPlaying(){
bkgrdmsc.stop();
}
//Add stuff like pausing and resuming if you desire
To use this class add this to any activity you want to play music:
MusicManager.getInstance().initalizeMediaPlayer(this, R.raw.menu); // to initalize of media player
MusicManager.getInstance().startPlaying();// to start playing music
MusicManager.getInstance().stopPlaying(); // to stop playing music
You can also use service to perform this task as service runs in background. You can start and stop service any time in your code.

Make an alert only appear when app is opened

Is there a way to make an alert only appear when the app is opened? I'm creating an alert in onStart() in my MainActivity and whenever I go back to that activity in the app, it shows the alert again which can be annoying to the user. Or is there a way to create a "got it" button and then turn off the alert? Here is my code:
protected void onStart() {
super.onStart();
new AlertDialog.Builder(this)
.setTitle("Instructions")
.setMessage("Hello! To begin, select a map from the list to train with. Make sure" +
" you are on the correct floor.")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
})
.setIcon(R.drawable.ic_launcher)
.show();
}

This is because when another activity comes to foreground upon your MainActivity makes your activity goes to OnPause().
Then when you go back to your MainActivity. The system calls
onStart() again. See The activity life cycle
-First Solution
public class TestActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState == null) {
showAlertDialog();
}
}
private void showAlertDialog() {
// code to show alert dialog.
}
}
-Second Solution
public class TestActivity extends ActionBarActivity {
private static boolean isAlertDialogShownBefore = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (!isAlertDialogShownBefore) {
showAlertDialog();
isAlertDialogShownBefore = true;
}
}
private void showAlertDialog() {
// code to show alert dialog.
}
#Override
public void onBackPressed() {
isAlertDialogShownBefore = false;
super.onBackPressed();
}
}

Put that code in onCreate method of your activity. Check for saveInstanceState for null, if it is then show your alertDialog

ANDROID JAVA - Define all id's at once. (+create easy buttons)

I am new to programming in Java, i've managed to create a little calculator as a little test app.
But i think i am using way to much code for my needs.
So i've given a Button a name: buttonname
Now to change it's text when clicked i need to:
public class MyActivity extends Activity {
Button buttonname;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
buttomname = (Buttom) findViewById(R.id.buttomname);
}
public void buttonnameOnClick(View v) {
button1.setText ("NewText")
}
}
(i've bolted everything i had to add)
So i had to do everything above + connect the buttonClick through the xml file.
So i was wondering if there is a easier way to define all objects so i dont have to do: Button buttonname; and buttomname = (Buttom) findViewById(R.id.buttomname); all the time.
And i was wondering if there is a easier way to auto create button events.
(I am used to Visual Studio, but now i am kinda lost in Android Studio. So on Visual Studio i just had to double click the button and type: buttonname.Text = "NewText";)

There is a library called Butter Knife to do approximately that
However, I'm not sure if you really need it.
Oh, and you don't have to find the same Button every time. You find it once in onCreate and store in a field.

First of all you have typo in
buttomname = (Buttom) findViewById(R.id.buttomname);
It should be
buttomname = (Button) findViewById(R.id.buttomname);
and you forgot ; in one line "didn't your IDE show error to you!!" and also small correction in
public void buttonnameOnClick(View v) {
button1.setText ("NewText")
}
it should be
buttomname.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
buttomname.setText ("NewText");
}
});
inside protected void onCreate.
2nd method:
And if you have define android:onclick="buttonnameOnClick" in XML then
public void buttonnameOnClick(View v) {
button1.setText ("NewText")
}
To be corrected to
public void buttonnameOnClick(View v) {
buttomname.setText ("NewText");
}

You can do it in a loop if you have a lot of identical buttons to process
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
for (int btn_id : new int[]{
R.id.buttomname
, R.id.buttomname2
, R.id.buttomname3
}) {
View v = view.findViewById(btn_id);
if (v != null) {
v.setOnClickListener(onClickButton);
}
}
}
//
private View.OnClickListener onClickButton = new View.OnClickListener() {
#Override
public void onClick(View view) {
// .. handle click
if (view.getId()==R.id.buttomname2){
}
}

Your code is partly correct,
however the
(Buttom) is wrong change it to (Button)
the other thing
public void buttonnameOnClick(View v) {
button1.setText ("NewText")
}
can just be changed to:
public void buttonnameOnClick(View v) {
Button buttonTemp = (Button)v;
buttonTemp.setText ("NewText");
}
Assuming you are calling the method from layout xml file.

you must use the onClickListener() method for Button object.
Your code like this structure;
buttonname = (Button)findViewById(R.id.buttonname);
buttonname.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
}
});
I recommend to your visit Button | Android Dev page for Button.

How to enter two activity links in another activity?

I know my question might be stupid but I am new in Android App development and the Eclipse things but reached to e problem that can't find solution in internet.
I am making multi-activity application and reached to a point where when i have two buttons in one of the activities and want each of them to lead to different other activities, the application crashes. When I lead them both to one activity, everything is fine. Here is my code and hope really my question not to be so stupid as I am thinking.
public class Home extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Button myButton = (Button) findViewById(R.id.tables);
myButton.setOnClickListener(goToTables);
Button mySecondButton = (Button) findViewById(R.id.reservations);
mySecondButton.setOnClickListener(goToMenu);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.home, menu);
return true;
}
private OnClickListener goToTables = new OnClickListener(){
#Override
public void onClick(View v) {
doButton();
}};
private void doButton()
{
startActivity(new Intent(this, Tables.class));
}
private OnClickListener goToMenu = new OnClickListener(){
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
doSecondButton();
}};
private void doSecondButton()
{
startActivity(new Intent(this, Menu.class));
}
}
The goToTables works perfectly but I am missing something important to change in goToMenu. My other activities are: Tables and Menu. Can somebody please tell me where I am wrong? Thanks in advance!

android:onClick="dobutton" try adding this in your button tag in xml code rather then using onclicklistner.

Try changing the name of your Menu activity or add the full name path of Menu.class in your intent, eg. com.myapp.Menu.class