Hi am new to android and have spent over 10 hours looking for this answer but i cant seem to find and understand it. I am at the main xml page. I am trying to create a button that goes to another page. I need the easiest and simplest way to do this. Can anyody please help me? Heres my code for my main xml.
<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" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:padding="#dimen/padding_medium"
android:text="#string/hello_world"
tools:context=".MainActivity" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textView1"
android:layout_centerHorizontal="true"
android:layout_marginTop="66dp"
android:text="Button" />
</RelativeLayout>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textView1"
android:layout_centerHorizontal="true"
android:layout_marginTop="66dp"
android:text="Button" />
Go to your activity Initialize your button
Button btn=(Button)findViewById(R.id.button1);
// Register listener to button btn
btn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// your action
Intent newActivityIntent= new Intent(currentActivity.this, NewClass.class);
startActivity(newActivityIntent);
}
});
You can also do it different...
You can instantiate a Button in your Activity:
private Button button;
Inside the onCreate(Bundle bundle) method you find your button, as defined at this Activity XML, which is the one you used setContentView(R.layout.yourxml);:
button = (Button) findViewById(R.id.button);
Then you use an OnClickListener:
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
}
});
Inside the onClick method, you instantiate an Intent
Intent intent = new Intent(CurrentActivity.this, ActivityToGo.class);
CurrentActivity = the one you are, and ActivityToGo the one you want to load.
startActivity();
Read the basics on Android here.
public class MyActivity extends Activity implements OnClickListener {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(this);
}
public void onClick(View v) {
// Use a switch on v.getId() if you have multiple clickable views.
// Since there's just one button, ...
Intent intent = new Intent(this, TargetActivity.class;
startActivity(intent);
}
}
You have to learn How to switch between Activities/Screens in Android, you can find here a well explained tutorial for beginners
This process is documented on the website concerning buttons. Google search Android Button
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textView1"
android:layout_centerHorizontal="true"
android:layout_marginTop="66dp"
android:text="Button"
android:clickable="true"
android:onClick"insertMethodNameHere"
/>
This will call the method you define in the onClick tag, then start a new activity or update the view. Whatever you need to do
Related
I want to navigate two buttons to the same class. In one XML, I have two buttons, both should work the same way. How can I achieve this?
Define two button with different id and point to same function in onClick event
<Button
android:id="#+id/button1"
android:onClick="executeSameBehavior"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button1" />
<Button
android:id="#+id/button2"
android:onClick="executeSameBehavior"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button2" />
And then implement your logic here:
public void executeSameBehavior(View view) {
// Your logic
}
You can simply assign one clickListener interface to both setOnClickListeners
Button a = findViewById(R.id.a);
Button b = findViewById(R.id.b);
View.OnClickListener listener = new View.OnClickListener() {
#Override
public void onClick(View view) {
// Something for both
}
};
a.setOnClickListener(listener);
b.setOnClickListener(listener);
I am making an android app in which I have a screen whose xml looks like:
<LinearLayout
android:id="#+id/btns"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="2"
android:orientation="horizontal" >
<Button
android:id="#+id/viewCalendar"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#drawable/bg_name_2"
android:gravity="center"
android:layout_margin="0.5dp"
android:text="View Calendar"
android:textColor="#android:color/primary_text_dark" />
<Button
android:id="#+id/createNewMeeting"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#drawable/bg_name_2"
android:gravity="center"
android:layout_margin="0.5dp"
android:text="Add New Meeting"
android:textColor="#android:color/primary_text_dark" />
</LinearLayout>
Now you can see I have two Buttons View Calendar and Add New Meeting. The problem is View Calendar button responses on single click while Add New Meeting button responses on double click (Note that this happens only when I come into this screen first time after app starts and works fine until the app closed). When app closed and start again then first time again on this screen this button firing after two taps and so on...
Here is the Java code nothing new just setting onClickListener on Button
addNew = (Button) findViewById(R.id.createNewMeeting);
addNew.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
// code for add new meeting
Intent intent = new Intent(getActivity(),
ActivityReminderNew.class);
startActivity(intent);
}
});
viewCalendar = (Button) findViewById(R.id.viewCalendar);
viewCalendar.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
// code for calendar view
}
});
R&D: I have been searching for this problem but mostly I get the answers like to set android:focusableInTouchMode="true" or android:focusable="true" in xml but its not solving my problem.
Hope I explained my problem in detail and you guys could understand my issue. Any type of help would be appreciated.
I am new to Android Programming, what I am trying to do in this Android Application is to create a xml page filled with buttons.
When I click the button, the button would change to light green color and when I click it again, it would change to light grey
The error: I am getting is when I click the button, it increases in size and overlaps with the other buttons, please help me out here, it is not user friendly in this case
attached below is the code:
lockerbooking.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="#+id/sisButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="16dp"
android:layout_marginTop="28dp"
android:text="#string/sis"
/>
<Button
android:id="#+id/solButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/soeButton"
android:layout_alignBottom="#+id/soeButton"
android:layout_alignParentRight="true"
android:text="#string/sol" />
<Button
android:id="#+id/soeButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/sisButton"
android:layout_alignBottom="#+id/sisButton"
android:layout_centerHorizontal="true"
android:text="#string/soe" />
</RelativeLayout>
Code:
makeBooking.java
public class makeBooking extends Activity {
Button sisButton;
Button solButton;
Button soeButton;
Button sobButton;
super.onCreate(savedInstanceState);
// Get the message from the intent
setContentView(R.layout.lockerbookpage);
Intent intent = getIntent();
// Initialize TextViews
sisButton = (Button) findViewById(R.id.sisButton);
solButton = (Button) findViewById(R.id.solButton);
soeButton = (Button) findViewById(R.id.soeButton);
sobButton = (Button) findViewById(R.id.sobButton);
}
public OnClickListener solButtonListener = new OnClickListener(){
boolean flag = true;
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(flag){
solButton.setBackgroundColor(Color.GREEN);
}
else{
solButton.setBackgroundColor(Color.LTGRAY);
}
flag=!flag;
}
};
...The code goes on
Please help me out here, I am eager to learn
to avoid overlapping of buttons, use fixed width and height for buttons:
change this:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
to some this like this:
android:layout_width="100dp" //what ever size suits your layout
android:layout_height="50dp" //fixing this,will not overlap the buttons
I'm making a button in xml(res / layout / activity_home.xml), like this:
<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=".HomeActivity" >
<ImageView
android:id="#+id/imageView1"
android:src="#drawable/schkopwide"
android:contentDescription="#string/HTI"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="78dp"
android:onclick="Intent i = new Intent(activity_store.xml);
startActivity(i);"
android:text="#string/HTI" />
</RelativeLayout>
so what should I add into this xml to let it redirect to another xml page (res / layout / activity_store.xml)?
Thank you
If you Want to show two different layouts in Same Activity, then ViewSwitcher is best layout.
You can add multiple layouts in ViewSwithcher. And Replace them by using viewswitcher.next(); function.
<ViewSwitcher
android:id="#+id/viewswitcher"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<!-- Add Two View’s Here -- >
</ViewSwitcher>
You can take reference from this link: http://abhiandroid.com/ui/viewswitcher
Try out as below:
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="78dp"
android:onclick="start"
android:text="#string/HTI" />
In your main activity :
Button button = (Button)findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(this, ActivityStore.class);
startActivity(i);
}
});
Here is your ActivityStore Class code:
public class ActivityStore extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_store);
}
}
Also add the activity into your mainfest file.
<activity
android:name=".ActivityStore"
android:label="#string/app_name"/ >
You can't add the launch of an Intent inside the onclick parameter in XML. You have to do it by code.
In your code:
Button button = (Button)findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(this, ActivityStore.class);
startActivity(i);
}
});
And in the OnCreate of the ActivityStore class, put this
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_store);
}
NOTE: I supposed that yous activity_store class is called ActivityStore
You need to check on Android documentation :
Activity
OnClickListener
Intent
http://developer.android.com/training/index.html
Good luck.
Try this,
Statically include XML layouts inside other XML layouts. use include. Add the below code in your activity_store.xml
<include layout="#layout/activity_home"/>
Sure you will get solution.
A simple way would be to create an Activity with another xml attached to it and then use intent.
How would I implement a Buttonlistener for a second layout which is still be called in the main Acitivity?
I already tried it by a named Button listener and via an anonymous. But still get nullpointer Exceptions.
Code:
back = (Button) findViewById(R.id.backToMain);
if(back != null)
back.setOnClickListener( new View.OnClickListener() {
public void onClick(View view) {
setLayout(R.layout.main);
}
});
Layout.xml
<Button android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:id="#+id/backToMain"
android:text="Zurück">
</Button>
Try this
Change the button attr tag
<Button android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:id="#+id/backToMain"
android:text="Zurück"
android:onClick="goBack">
</Button>
In your activity create a method
public void goBack(View v) {
//Write code here
}