I want to make a one button goes to different activities, I have uploaded an image to show how I planned to do.
The idea is to come from Activity 1 or Activity 2 and find the same Layout and Button and go through it to Activity 7 or Activity 8 according to the Activity I was on.
I hope that I have explained my idea with a good way to be understood.
You need to pass an identifier or key with intent from your 1st part of activities as shown in the image and based on that key identify where the activity came from and where is it supposed to go. You can use if statements inside your button click function
Example
in xml for all your 3 button
<Button
android:name = "#id/button1"
android:onClick = "button1">
define other button and their properties
in java file
public void button1(View v)
{
Intent i = getIntent()
String key = i.getStringExtra("key");
if(key == "activity5")
{
Intent i = new Intent(this, Activity5.class);
startActivity(i);
}
else if (key == "activity6")
{
Intent i = new Intent(this, Activity6.class);
startActivity(i);
}
}
Related
New to Android Studio. I'm creating an app project for practice and I am trying to create a Menu Activity. I want to test to see if I can mute sounds and hide the display of text (score) via a Menu UI. I get that I can use Intent to pass values back and forth between activities and that I can use those values to turn features on and off across the app.
I cannot figure out with a button and onClick how to get a variable to change so that I can pass it via Intent. I've only seen it done INSIDE the onClick. I'm trying to change the variable OUTSIDE the onClick.
Example Code:
public class Menu extends AppCompatActivity {
private boolean soundOn = true;
private Button isSoundOn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu);
isSoundOn = findViewById(R.id.isSoundOn_button);
isSoundOn.setOnClickListener(v -> {
soundOn = false;
});
Now when I attempt to access the soundOn parameter and pass it on via Intent to another activity the value remains true, it never changes after the button is clicked.
I did figure out one trick, I can use intent and pass the value to the same activity, like so:
soundOff.setOnClickListener(v -> {
Intent intent = new Intent(Menu.this, Menu.class);
intent.putExtra("soundOn", false);
startActivity(intent);
This reloads the Activity after the button is clicked, it makes it appear as though a glitch happened as it is run, but I think that issue could be resolved via altering the transition animation...I think. However, this seems like a clumsy approach, especially in a Menu Activity that could have numerous settings to edit (sound, score, language, timer, color, background, etc.).
I get that I can have the onClick go back to the original Activity with the change, but I want to create a menu where I can have multiple selections made and then pass them all back to the original Activity.
I hope this makes sense, I know this is rather basic, but I'm new to this and my searching hasn't been able to yield a solution. Thanks.
If you are doing an intent to the same Activity you should retreive your intent on the onCreate method:
isSoundOn = intent.getBooleanExtra("soundOn", true) //true is the default parameter in case intent does not contain that key;
That way you are always checking your intent in case you need it.
You also need to use your variable in the intent; right now you are always setting it to false:
soundOff.setOnClickListener(v -> {
Intent intent = new Intent(Menu.this, Menu.class);
intent.putExtra("soundOn", soundOn);
startActivity(intent);
}
There are other solutions, for example: you can use SharedPreferences for persisting your values and then call this.recreate to recreate Activity again and avoid using intents. Then you can retreive your SharedPreferencesvalues on the onCreate method to do whatever you want.
Now when I attempt to access the soundOn parameter and pass it on via
Intent to another activity the value remains true, it never changes
after the button is clicked.
Lets start with keeping track of soundOn
When Menu activity is first launched soundOn = true
When isSound button is clicked soundOn = false
Intent intent = new Intent(Menu.this, Menu.class);
intent.putExtra("soundOn", soundOn); // false is the value that is extra.
startActivity(intent);
When MenuActivity is again launched due to the intent soundOn = true this is because of this line
private boolean soundOn = true; //<---
You are passing Extra in intent but you arent storing the intents extra value in soundOn
Thats why it is true always
to solve this use need to Get the Intent Extra that you have passed and we do it in onCreate method
private boolean soundOn = true;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu);
Intent intent = getIntent();
if(intent != null) { // we need to get this cause when we first start our app we dont start it with any intents
soundOn = intent.getExtra("soundOn");
}
}
I'm a newbie and I'm working on a Unit Converter.
I would like to open the same UI regardless of which button I click(Weight or Length)
main_activity.xml UI
Below is the UI I want to open: activity_conversion.xml UI
And I would like each button in the main_activity to run on a different java class.
So, (minus the main_activity.java and it's .xml file)
I have 1 xml file(activity_conversion.xml) and 2 java files one for each button of the main_activity.xml
activity_main.xml Weight button
android:onClick="weightPage"
activity_main.xml Length button
android:onClick="lengthPage"
MainActivity.java
public void weightPage(View view){
Intent intent = new Intent(this, WeightActivity.class);
startActivity(intent);
}
public void lengthPage(View view) {
Intent intent2 = new Intent(this, LengthActivity.class);
startActivity(intent2);
}
Length_Activity.java code for Length button
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_conversion);
}
setContentView() method doesn't work for me:(
Thanks in advance!
I would like to open the same UI regardless of which button I click(Weight or Length)
You can do that by creating an activity and its layout XML file. And then start that activity via explicit intent like this:
//Place this code inside the onClick method
Intent intent = new Intent(SoucreActivity.this, DestinationActivity.class);
startActivity(intent);
And I would like each button in the main_activity to run on a different java class.
No, you cannot. All UI elements on a screen are always in the same activity; they cannot run on different java classes. (Unless you are using fragments of which you need not worry about as you are a newbie)
Apparently, you want the two buttons in your main activity to open the same activity. Which you can achieve using intents using the code snippet mentioned above.
I'm creating my first mobile app and I'm trying to bind a button to go straight to another xml file. It seems like such an easy answer but I can't find the solution anywhere. I'm using Eclipse as my IDE and using the Android ADT bundle, if that's at all relevant.
Put this in onCreate:
findViewById(R.id.my_button).setOnClickListener(new View.OnClickListener {
#Override
public void onClick() {
startActivity(new Intent(MainActivity.this, OtherActivity.class))
}
});
Replace my_button with the id of your button and MainActivity.this with the name of your main activity class.this and OtherActivity with the name of your other activity.class.
Are you asking how to create a layout with button that brings different layout? If so, you can drag button on your layout and put method in the "On Click" property of the button, something like myClick and then in your code add method
public void myClick(View v) {
startActivity(new Intent(this, MyNewActivity.class));
}
Make sure to declare new activity in AndroidManifest
Hope it helps
In your xml file, add this line of code to your button:
<Button>
//other button properties here
android:onClick='onNextPage'
</Button>
and in the activity/java file for that page, do this:
private void onNextPage(View view){
Intent intent = new Intent(this, nextActivity.java);
startActivity(intent);
}
when you click the button, you'll go to nextActivity.java or whatever you named your second page to be.
I'm trying to have a program go from one class to another by the press of a button. I know this needs to be done with intent, but I'm not sure exactly what action to use for intent. Also, i would rather not try to use OnClickListener since it seems to me to be a bit excessive for what I need to do. Though I could be wrong and I'm just over thinking it. Here's what I have for the code:
public void loginScreen(View view) {
// Should take user to the next view when button pressed
Intent intent = new Intent(this, LoginActivity.class);
Button login = (Button) findViewById(R.id.button1);
intent.getData(login);
startActivity(intent);
}
I want it to go to the next screen when only button1 is pressed so i don't know if just lines 3 and 6 are the only ones needed, but it won't work if it's just those two. I believe the problem is getData, i don't know what to put there, but i know getData's wrong. I'm probably also missing something else, but I don't know what.
Also, forgive me if this isn't easy to follow, first time trying to ask a question here.
In your XML file you can declare your on click:
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="loginScreen" />
Then in your Activity:
public void loginScreen(View button) {
Intent intent = new Intent(this, LoginActivity.class);
startActivity(intent);
}
Here is the onClick View API
Name of the method in this View's context to invoke when the view is
clicked. This name must correspond to a public method that takes
exactly one parameter of type View. For instance, if you specify
android:onClick="sayHello", you must declare a public void
sayHello(View v) method of your context (typically, your Activity).
Note that if you add an onClick to a Fragment layout it will still need to be caught in the Activity.
Without explicitly setting an onClickListener:
<button
...
android:onClick="loginClicked" />
public void loginClicked(View v) {
Intent intent = new Intent(this, LoginActivity.class);
startActivity(intent);
}
Also setting an onClickListener explicitly is not overkill.
Your question isn't entirely clear, so let me know if you need more and I'll edit my answer.
I'm trying to load a new layout when I click a button, this layout has only a webView in it so my goal is, when the button is clicked that it opens the webView and directs the user to a pre-determined page. Right now I have
Button codesBtn = (Button)findViewById(R.id.imagebutton1);
codesBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
setContentView(R.layout.codes);
}
});
This is inside my onCreate() method in my main activity. I have a couple concerns:
1) is this the correct place to put this block of code into?
2) Do I need to create a separate activity for the webView and what I want the button to do?
3) If so, what is the basic structure of the activity needed?
Thanks in advance!
In general, rather than changing the layout in the current activity it is easier to launch a new activity with the new layout.
If you want to direct the user to a website, you could use an intent to ask the browser to open (example taken from this question)
String url = "http://almondmendoza.com/android-applications/";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
Or, you could create an Activity that just has a WebView and launch that by saying;
Intent i = new Intent(this, MyWebViewActivity.class);
i.putExtra("destination", myDestination);
startActivity(i);