What I am trying to achieve (which I do not know if it is even doable, since I'm new to android development) is to have:
- A MainActivity class utilize/reference and XML layout (this i know is doable)
- Within the MainActivity class also call a custom Layout programmatically (I am uncertain how to do this)
To elaborate on my question
I have the following XML layout which is compromised of two items:
- A dropdown menu
- A RelativeLayout view (*** this is where I would like to link to my custom class to)
Here is the XML code:
<?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"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.google.android.material.textfield.TextInputLayout
android:id="@ id/weekDropdown"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.ExposedDropdownMenu"
android:hint="@string/select_week"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:labelFor="@ id/weekSelected">
<AutoCompleteTextView
android:id="@ id/weekSelected"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="none"
android:layout_weight="1"
android:padding="14dp"
android:textSize="16sp" />
</com.google.android.material.textfield.TextInputLayout>
<RelativeLayout <-- Here is where I would like to link my custom class
xmlns:tools="http://schemas.android.com/tools"
android:id="@ id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
</RelativeLayout>
</LinearLayout>
In my custom class, I build my layout/view programmatically:
public class MainActivityLayout extends RelativeLayout {
Context context;
TableLayout tableA;
TableLayout tableB;
TableLayout tableC;
TableLayout tableD;
public MainActivityLayout(Context context) {
super(context);
this.initComponents();
this.setComponentsId();
etc...
}
}
Which I call it from my MainActivity
class like so:
setContentView(new MainActivityLayout(this));
So is it possible to link the RelativeLayout in the XML to my custom class? If so can you let me know how to do so?
CodePudding user response:
If you want to use your custom view, the easiest way is to include it in the xml. So this needs to be changed:
<RelativeLayout
xmlns:tools="http://schemas.android.com/tools"
android:id="@ id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
</RelativeLayout>
into this
<myapp.mypackage.MainActivityLayout
xmlns:tools="http://schemas.android.com/tools"
android:id="@ id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
</myapp.mypackage.MainActivityLayout>
Change myapp.mypackage
based on the real path of MainActitvityLayout
.
Then just use it like any other usual layouts.
setContentView(R.layout.main_activity);
Also you must override these constructors:
public MainActivityLayout(Context context)
{
super(context);
}
public MainActivityLayout(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public MainActivityLayout(Context context, AttributeSet attrs, int defStyleAttr)
{
super(context, attrs, defStyleAttr);
}
public MainActivityLayout(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)
{
super(context, attrs, defStyleAttr, defStyleRes);
}
However, if you insist on using it like this:
setContentView(new MainActivityLayout(this));
You can not use the main xml layout at all, but you can still inflate xml files onto your custom view. I won't write them here, you can easily search on this site on how implementing them.