Hi I am trying to add compound view class into my view programmatically. But I don't know how to do that.
I can add directly it in to layout and thats working fine.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mainLlt"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<com.example.androidcustomvliveapplication.widget.CustomCardSection
android:id="#+id/cardSection2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</com.example.androidcustomvliveapplication.widget.CustomCardSection>
</LinearLayout>
Above thing working fine. But I want to add above composite layout programmatically.
LIke I want to do like this
mainLlt.add(customcardsection)
Need Some help. Thank you.
public class CustomCardSection extends RelativeLayout
{
int section;
#SuppressLint("NewApi")
public CustomCardSection(Context context, AttributeSet attrs,
int defStyleAttr, int defStyleRes)
{
super(context, attrs, defStyleAttr, defStyleRes);
}
public CustomCardSection(Context context, AttributeSet attrs,
int defStyleAttr)
{
super(context, attrs, defStyleAttr);
}
public CustomCardSection(Context context, AttributeSet attrs)
{
super(context, attrs);
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.custom_card_section, this, true);
}
public CustomCardSection(Context context)
{
super(context);
}
}
Related
I created a custom view with the following code :
public class TestView extends LinearLayout {
public TestView(Context context) {
this(context, null);
}
public TestView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public TestView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView(context);
}
private void initView(Context context) {
LayoutInflater.from(context).inflate(R.layout.layout_test, this);
setBackgroundResource(R.color.black);
}
}
layout_test.xml :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"/>
It works well, background is black.
But once I added background attribute to xml, setBackgroundResource
not work anymore(layout_test.xml):
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"/>
activity_layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="match_parent">
<TestView
android:id="#+id/testView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
github.com/MummyDing/TestView
try this.
public class TestView extends LinearLayout {
public TestView(Context context) {
this(context, null);
setBackgroundResource(R.color.black);
}
public TestView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public TestView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView(context);
}
private void initView(Context context) {
LayoutInflater.from(context).inflate(R.layout.layout_test, this);
}
}
try to use with the help of context
LayoutInflater.from(context).inflate(R.layout.layout_test, this).
setBackgroundColor(context.getResources().getColor(R.color.colorAccent));
Try using an id like:
LinearLayout lLayout = (LinearLayout) findViewById(R.layout.my_linear_id);
lLayout.setBackgroundColor(context.getResources().getColor(R.color.green_color));
where my_linear_id is the id of you LinearLayout
What is correct way to extend EditText?
The problem is following:
I have empty application from template with two EditText:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="one"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="two"/>
</LinearLayout>
It works fine:
Then I create my custom view from EditText:
public class CuteEditText extends EditText {
public CuteEditText(Context context) {
this(context, null);
}
public CuteEditText(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CuteEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// some special initialization will be here
}
}
And when I change EditText to my CuteEditText, interface works incorrectly:
The problem is not only with view ot UI. If I type something in first EditText and than touch the second one, nohing happens: input will continue in first.
The same behaviour if I inherite CuteEditText from AppCompatEditText.
What is wrong?
Sources for experiment are available at https://github.com/tseglevskiy/EditTextExperiment
Your construtors are broken. This is how it should look:
public class CuteEditText extends EditText {
public CuteEditText(Context context) {
super(context);
}
public CuteEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CuteEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
}
You don't need the third constructor overload. The first one is for creating the view programmatically and the second one is for creating the view from xml. Those two should be enough for most cases.
public class CuteEditText extends EditText {
public CuteEditText(Context context) {
this(context, null);
}
public CuteEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
}
I am really worried about the .findViewById() method and its use in a custom compound view creation. I am not sure about the exact place that it is guaranteed that it will never return null.
Let's say I have this custom compound view and that it is added to some .xml like this:
<com.app.path.TwoButtonsView
android:id="#+id/ok_cancel_view"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
two_buttons_view.xml:
<?xml version="1.0" encoding="utf-8"?>
<merge>
<LinearLayout 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"
android:orientation="horizontal">
<TextView
android:id="#+id/first_button"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:clickable="true"
android:gravity="center"
android:textAllCaps="true"/>
<TextView
android:id="#+id/second_button"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:clickable="true"
android:gravity="center"
android:textAllCaps="true"/>
</LinearLayout>
</merge>
TwoButtonsView.java
public class TwoButtonsView extends LinearLayout {
// views
private TextView mFirstButtonView;
private TextView mSecondButtonView;
public TwoButtonsView(Context context) {
super(context);
init(context, null);
}
public TwoButtonsView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public TwoButtonsView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public TwoButtonsView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.two_buttons_view, this);
// retrieve views
mFirstButtonView = (TextView) findViewById(R.id.first_button); // is there a chance it will return null?
mSecondButtonView = (TextView) findViewById(R.id.second_button); // is there a chance it will return null?
}
}
My question is: is there any chance that .findViewById(RESOURCE_ID) will return null right after calling inflater.inflate(R.layout.two_buttons_view, this);, or should I call my init() method on onFinishInflate() callback?
My question is: is there any chance that .findViewById(RESOURCE_ID)
will return null right after calling
inflater.inflate(R.layout.two_buttons_view, this)
No, there is not, as long as the views you are looking for are in the layout and you explicitly added to the view's hierarchy. In the end, findViewById loops on View[], filled up by addView.
A small note about
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.two_buttons_view, this);
ViewGroup has the static method inflate, so you don't need to retrieve the inflater calling getSystemService
I am facing one exception in my Custom Linear layout. Please see the sample code below.
public class ParentView extends LinearLayout {
private Menu mMenu;
public DontPressWithParentView(Context context, AttributeSet attrs, Menu menu) {
super(context, attrs);
mMenu = menu;
}
}
When I am using this layout in xml like below
com.android.ParentView
android:id="#+id/call_icon"
android:layout_width="91dip"
android:layout_height="83dip"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="22dip"
android:gravity="center" >
</com.android.hParentView>
It is giving me xml inflate exception. Please help me.
You have to implement the following constructors in your Viewcode:
public ParentView(Context context) {
super(context);
}
public ParentView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ParentView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#TargetApi (Build.VERSION_CODES.LOLLIPOP)
public ParentView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
Furthermore please check if your package declaration in your xml is correct:
com.android.ParentView
It sounds a bit weird to me.
textView.setText is not working properly in a compound view.
Means Both hello and jack are appearing...
and jack is displayed below layout not appearing if I put some background color,...
Could somebody help... Thanks and regards...
Here is my code...
Layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/chatLayout"
android:layout_width="300dp"
android:layout_height="400dp"
>
<TextView
android:id="#+id/chatNamed"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="Hello"
android:textColor="#ffffff"
android:textSize="20dp"
android:textStyle="bold"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
/>
</RelativeLayout>
CompoundView.java
public class ChatCompoundView extends RelativeLayout {
private static TextView zoneName;
public ChatCompoundView(Context context) {
this(context, null);
setView();
}
public ChatCompoundView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
setView();
}
public ChatCompoundView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setView();
}
public void setView()
{
inflate(getContext(), R.layout.chat_layout, this);
zoneName = (TextView) findViewById(R.id.chatNamed);
}
zoneName.setText("jack");
}
try this..
LayoutInflater mInflater;
public ChatCompoundView (Context context) {
super(context);
mInflater = LayoutInflater.from(context);
setView();
}
setView():
public void setView(){
mInflater.inflate(R.layout.custom_view, this, true);
TextView zoneName = (TextView) findViewById(R.id.chatNamed);
zoneName .setText("jack");
}
Yeah Now I got the Answer... Actually my constructors are called with this(context),.. and I need to call super(context)...
Code Changed to
public ChatCompoundView(Context context) {
super(context);
setView();
}
public ChatCompoundView(Context context, AttributeSet attrs) {
super(context, attrs);
setView();
}
public ChatCompoundView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setView();
}