find the button onclick function in android activity - java

This is my login form is valid means :
if(isUserValidated && isPasswordValidated)
{
if(DetailProductDescription.product_id==null){
Intent intent = new Intent(LoginForm.this,HomePage.class);
startActivity(intent);
}
else
{
Intent intent = new Intent(LoginForm.this,WatchList.class);
startActivity(intent);
}
}
EDIT:
Here i have to check another condition in else part:
in else part having to check another condition:
if am getting the product_id on DetailProductDescription page without login :
DetailProductDescription class only having these 2 buttons.They are watchlist and wishlist.
if i have to click watchlist button on DetailProductDescription.class means its go to WatchList class.
if i have to click wishlist button on DetailProductDescription.class means its go to
new AddToWishListAsync().execute(); class.
How can i identify the these DetailProductDescription.watchlist and DetailProductDescription.wishlist button on LoginForm and how can i write the condition for these ??
please provide me solution for tehse.


So your Problem is,
Button watchlist -> Login class -> WatchList class
Button wishlist -> Login class-> AddToWishListAsync class
'Login' have to identify which button.
isn't it?
I'll suggest put an extra with intent call. ie,
in DetailProductDescription
watchListBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(DetailProductDescription.this, LoginForm.class);
intent.putExtra("from","watch");
startActivity(intent);
}
});
wishListBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(DetailProductDescription.this, LoginForm.class);
intent.putExtra("from","wish");
startActivity(intent);
}
});
Now, in LoginForm
String from=getIntent.getStringExtra("from");// you got it as 'watch' or 'wish', or null.
Now check the string and proceed.


It will be better to have WatchList button and WishList button inside your login xml layout itself. The visibility of these buttons should be View.INVISIBLE or View.GONE by default. Either you can hide these buttons from layout or you can do so in onCreate method of your Login Activity.
Button watchListBtn = null;
Button wishListBtn = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_login_screen);
watchListBtn = (Button) findViewById(R.id.loginBtn);
watchListBtn.setVisibility(View.GONE);
watchListBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(LoginForm.this, WatchList.class);
startActivity(intent);
}
});
wishListBtn = (Button) findViewById(R.id.wishlistBtn);
wishListBtn.setVisibility(View.GONE);
wishListBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// your code to launch wishlist activity
}
});
// your other onCreate stuff........
}
Then your login validation code
if(isUserValidated && isPasswordValidated) {
if(DetailProductDescription.product_id==null) {
Intent intent = new Intent(LoginForm.this,HomePage.class);
startActivity(intent);
} else {
Intent intent = new Intent(LoginForm.this,WatchList.class);
startActivity(intent);
}
} else {
watchListBtn.setVisibility(View.VISIBLE);
wishListBtn.setVisibility(View.VISIBLE);
}

Related

How to create a button on a different activity programmatically and save it on this activity?

I wanted to create a button on Homepage activity by clicking the button on GroupSettings activity. However, when I do so, and go back to Homepage, the button is not saved on the page.
Here is the java code that i have:
public void btnpressedme(View caller){
ConstraintLayout constraintLayout = findViewById(R.id.homepageLayout);
Button btnShow = new Button(this);
btnShow.setText("SIUUUUUUU");
btnShow.setLayoutParams(new ConstraintLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
btnShow.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View caller) {
Toast.makeText(GroupSettings.this, "HELLOOOO", Toast.LENGTH_LONG).show();
//Intent intent = new Intent(this, Group.class);
//startActivity(intent);
}
});
if (constraintLayout != null) {
constraintLayout.addView(btnShow);
}
}

Java Android String Intent displaying null when moving to previous screen

So I have a screen where a user enters their name, on button click they are redirected to a menu where it displays their name.
In the menu screen I have a button that takes me to another screen (About Me), on that screen I have a button with an Intent to go back to the Menu Activity.
The issue is that when I click the button with the Intent to go back, the name displays as null instead of what the User entered.
This does not happen when I use the actual android navigation buttons to go to the previous screen, only the Button i created to go back to the Menu Activity.
Launcher Activity where user enters their name
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_launcher_screen);
Button launcherNextBtn = (Button) findViewById(R.id.launcherNextBtn);
EditText launcherVisitorNameEditText = (EditText) findViewById(R.id.launcherVisitorNameEditText);
TextView launcherVisitorNameErrorTextView = (TextView) findViewById(R.id.launcherVisitorNameErrorTextView);
launcherVisitorNameErrorTextView.setText("");
launcherNextBtn.setOnClickListener((View v) -> {
String visitorName = launcherVisitorNameEditText.getText().toString();
if (visitorName.equals("")) {
launcherVisitorNameErrorTextView.setText("Please enter a value");
} else {
launcherVisitorNameErrorTextView.setText("");
Intent goToMenuActivity = new Intent(LauncherScreen.this, MenuScreen.class);
goToMenuActivity.putExtra("visitorName", visitorName);
startActivity(goToMenuActivity);
}
});
Menu activity where it displays the users name
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu_screen);
Button menuHomeBtn = (Button) findViewById(R.id.menuHomeBtn);
Button menuAboutMeBtn = (Button) findViewById(R.id.menuAboutMeBtn);
TextView menuNameTextView = (TextView) findViewById(R.id.menuNameTextView);
String visitorName = getIntent().getStringExtra("visitorName");
menuNameTextView.setText("Dear " + visitorName);
menuHomeBtn.setOnClickListener((View v) -> {
Intent goToLauncherActivity = new Intent(MenuScreen.this, LauncherScreen.class);
goToLauncherActivity.putExtra("visitorName", visitorName);
startActivity(goToLauncherActivity);
});
menuAboutMeBtn.setOnClickListener((View v) -> {
Intent goToAboutMeActivity = new Intent(MenuScreen.this, AboutMeScreen.class);
startActivity(goToAboutMeActivity);
});
}
About me activity, when I click the button to back to Menu, i get "Dear null"
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_about_me_screen);
Button aboutMeBackBtn = (Button) findViewById(R.id.aboutMeBackBtn);
String visitorName = getIntent().getStringExtra("visitorName");
aboutMeBackBtn.setOnClickListener((View v) -> {
Intent goToMenuActivity = new Intent(getApplicationContext(), MenuScreen.class);
startActivity(goToMenuActivity);
});
}

Your problem is in About me activity screen
aboutMeBackBtn.setOnClickListener((View v) -> {
Intent goToMenuActivity = new Intent(getApplicationContext(), MenuScreen.class);
startActivity(goToMenuActivity);
});
This time you are not passing an extra field, so you are getting null
Answer 1
aboutMeBackBtn.setOnClickListener((View v) -> {
onBackPressed();
});
Answer 2
aboutMeBackBtn.setOnClickListener((View v) -> {
Intent goToMenuActivity = new Intent(getApplicationContext(), MenuScreen.class);
goToMenuActivity.putExtra("visitorName", visitorName)
startActivity(goToMenuActivity);
});

How to create 2 or more than 2 button in Android

I want to create 2 or more than 2 two button in android but I got the problem in this line
View btnClick = findViewById(R.id.buttonClick);
View btnscan = findViewById(R.id.btscanClick);
//set event listener
btnClick.setOnClickListener(this);
}
//override the OnClickListener interface method
#Override
public void onClick(View arg0) {
if(arg0.getId() == R.id.buttonClick){
//define a new Intent for the second Activity
Intent intent = new Intent(this,SecondActivity.class);
//start the second Activity
this.startActivity(intent);
public void onClick1(View arg1) {
if(arg1.getId() == R.id.btscanClick){
//define a new Intent for the second Activity
Intent intent = new Intent(this,ScanActivity.class);
//start the second Activity
this.startActivity(intent);

may be the problem would be with your design, I thing you are implementing it in surface view. if you do so make your layout with LinearLayout and RelativeLayout, it would be better if you also add your .manifestfile

Hey cast your views to Button i.e. instead of
View btnscan = findViewById(R.id.btscanClick);
use
Button btnscan = (Button)findViewById(R.id.btscanClick);
also post the errors you are getting so that I can help you out.

Add listener to other button as well
Button btnscan = (Button)findViewById(R.id.btscanClick);
btnscan.setOnClickListener(this);
Button btnclick = (Button)findViewById(R.id.buttonClick);
btnclick.setOnClickListener(this);
And let handle the click with only one OnClick method.
public void onClick(View arg0) {
if(arg0.getId() == R.id.buttonClick){
//define a new Intent for the second Activity
Intent intent = new Intent(this,SecondActivity.class);
//start the second Activity
this.startActivity(intent);
}
else if(arg1.getId() == R.id.btscanClick){
//define a new Intent for the second Activity
Intent intent = new Intent(this,ScanActivity.class);
//start the second Activity
this.startActivity(intent);
}
}

The way you usually want to go to define the OnClickListener for buttons is as follow :
btnClick.setOnClickListener( new OnClickListener() {
#Override
public void onClick(View arg0) {
//define a new Intent for the second Activity
Intent intent = new Intent(this,SecondActivity.class);
//start the second Activity
this.startActivity(intent);
}
});
btnScan.setOnClickListener( new OnClickListener() {
#Override
public void onClick(View arg0) {
//define a new Intent for the scan Activity
Intent intent = new Intent(this,ScanActivity.class);
//start the second Activity
this.startActivity(intent);
}
});
This means that you use a different onClickListener for each button.

Custom dialog disappears when clicking next to it

I want to show a custom dialog and force the user to click on whether button one or two.
The problem is that users can use the back button AND if they click on the view that is shown in the background my dialog also disappears.
Why? And how could I prevent this?
final Main t = this;
final Dialog dialog = new Dialog(this);
dialog.setContentView(R.layout.prompt_input_access);
dialog.setTitle("Title");
Button cmdLoginAccount = (Button) dialog.findViewById(R.id.cmdLoginAccount);
Button cmdLoginBank = (Button) dialog.findViewById(R.id.cmdLoginBank);
cmdLoginAccount.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
loginToBank = true;
dialog.dismiss();
Intent intent = new Intent(t, UserMenu.class);
startActivity(intent);
}
});
cmdLoginBank.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
loginToBank = false;
dialog.dismiss();
Intent intent = new Intent(t, UserMenu.class);
startActivity(intent);
}
});
dialog.show();

You just need to use the setCanceledOnTouchOutside method :
dialog.setCanceledOnTouchOutside(false);

How to navigate from one screen to another screen

How to navigate from one Activity screen to another Activity screen? In the first screen I'm having one button if I click the button it has to move to another Activity screen.

The most trivial case (called from activity):
startActivity(new Intent(this, ActivityToLaunch.class));
More details here: http://developer.android.com/guide/topics/fundamentals.html

OnClickListener onClickListener = new OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(action));
}
};
Button button = (Button) findViewById(id);
button.setOnClickListener(onClickListener);

Button x.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
Intent i = new Intent(y.this, Activity.class);
startActivity(i);
}
});
Here we've defined a listener for Button x. The OS will call this method and start the Activity referenced in Intent i.
Here's the official tutorial example:
http://developer.android.com/guide/tutorials/notepad/notepad-ex2.html

Button btn = (Button)findViewById(R.id.button1);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(TestActivity.this,second.class));
}
});

public void onClick(View v)
{
Intent myintent = new Intent(currentclass.this, nextactivity.class);
startActivity(myintent);
}

This task can be accomplished using one of the android's main building block named as Intents and One of the methods public void startActivity (Intent intent) which belongs to your Activity class.
An intent is an abstract description of an operation to be performed. It can be used with startActivity to launch an Activity, broadcastIntent to send it to any interested BroadcastReceiver components, and startService(Intent) or bindService(Intent, ServiceConnection, int) to communicate with a background Service.
An Intent provides a facility for performing late runtime binding between the code in different applications. Its most significant use is in the launching of activities, where it can be thought of as the glue between activities. It is basically a passive data structure holding an abstract description of an action to be performed.
Refer the official docs -- http://developer.android.com/reference/android/content/Intent.html
public void startActivity (Intent intent) -- Used to launch a new activity.
So suppose you have two Activity class and on a button click's OnClickListener() you wanna move from one Activity to another then --
PresentActivity -- This is your current activity from which you want to go the second activity.
NextActivity -- This is your next Activity on which you want to move.
So the Intent would be like this
Intent(PresentActivity.this, NextActivity.class)
Finally this will be the complete code
public class PresentActivity extends Activity {
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.content_layout_id);
final Button button = (Button) findViewById(R.id.button_id);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
Intent activityChangeIntent = new Intent(PresentActivity.this, NextActivity.class);
// currentContext.startActivity(activityChangeIntent);
PresentActivity.this.startActivity(activityChangeIntent);
}
});
}
}
This exmple is related to button click you can use the code anywhere which is written inside button click's OnClickListener() at any place where you want to switch between your activities.

final Context cont = this;
Button btnClickABC =(Button)findViewById(R.id.btnClickABC);
btnClickABC.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(cont, NextActivity.class));
}
});

Use following code..I hope this will help you.
Button button = (Button)findViewById(R.id.xxx);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent=new Intent(CurrentActivity.this,NextActivity.class);
startActivity(intent);
}
});
xxx is id from your xml of your Button.

startActivity(new Intent(this,newActivity.class));

Switching from one activity to another is really simple, but tricky for a new one.
Your next class must be defined in AndroidManifest.xml. This is tester class:
<activity
android:name=".Tester"
android:label="#string/title_activity_tester" >`enter code here`
</activity>
final Button button = (Button) findViewById(R.id.btnGo);// btnGo is id
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(CurrentClass.this, Tester.class);
startActivity(i);
}

You can navigate to the next screen using these code snippets:
Kotlin
startActivity(Intent(this, LoginActivity::class.java))
Java
startActivity(new Intent(this, LoginActivity.class))
Here's a reference: Android Developers - Starting another activity

Intent intentobj=new Intent(FromActivity.this,ToActivity.class);
startActivity(intentobj);
or you can simply use
startActivity(new Intent(FromActivity.this,ToActivity.class));

For Kotlin (if you are in an activity)
buttonToClick.setOnClickListener{ startActivity(this,YourDestinationActivity::class.java)
}
If you are in a fragment
buttonToClick.setOnClickListener{
startActivity(requireActivity, YourDestinationActivity::class.java)
}

In your method fun onCreate(savedInstanceState: Bundle?) add this.
your_btn_id.setOnClickListener{
val intent = Intent(this, yourpagename::class.java)
startActivity(intent)
}
Until now if it doesn't work then, check if these two files are added or not,
import android.content.Intent
import kotlinx.android.synthetic.main.activity_otp.*

Try this code:
Button my_btn;
my_btn = findViewById(R.id.submit_btn);
my_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
setContentView(R.layout.activity_2);
}
});

Button navigate;
navigate = findViewById(R.id.button);
navigate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),"Navigate another Activity",Toast.LENGTH_LONG).show();
Intent intent = new Intent(MainActivity.this,MainActivity2.class);
startActivity(intent);
}
});

Just go to XML file and add Onclick = "opennewactivity" in button xml.
Then go to java code and create class opennewactivity you can just make it my clciking alt+Enter in xml code's "opennewactivity". in that just write
Intent intent = new Intent(this, newacivity.class);
startActivity(intent);
and if you want user to not get back to first activity again then just write this
Intent intent = new Intent(this, newactivity.class);
startActivity(intent);
finish();

Cartoon_card.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v)
{
newActivity();
}
});
}
public void newActivity()
{
Intent selectClass= new Intent(getApplicationContext(), com.example.fyp.videoplayer.class);
startActivity(selectClass);
}

Categories

Resources