I have a LinearLayout defined in a file called intro_step1_activity.xml. I would like to load/reference this file in another xml file so that I do not need to retype the code in the other xml file. Is this possible and if so how can it be done?
At runtime you can use an inflater, for instance:
Inflater inflater = LayoutInflater.from(this);
View view = inflater.inflate(R.layout.intro_step1_activity, null);
then you can add this view to the current view hierarchy. At compile time you can use the include tag for the xml
<include layout="#layout/intro_step1_activity"/>
Load an existing xml layout file in another xml layout file
to use xml file in other xml file use <include />
for your intro_step1_activity.xml use code
<include layout="intro_step1_activity.xml"/>
Yes, it's possible using <merge> or <include>.
You can read more here and here
first give an id to that LinearLayout and then define a LinearLayout in java and reference it using the findViewById() method.
then use the LinearLayout object you just created to call the addView() method.
if you want an example, comment.
Related
I'm working on a project which i need to change a string stored in res/values folder. I searched a lot in google and stackoverflow but couldnt find any answer.
The goal is that there is an specific xml file for my project within it another xml file is included which the root of xml is saved in string. like :
<include layout="#string/xmlName"/>
<string name="xmlName">#layout/form2</string>
I want to change this string in order to change the view of my layout.Any helpful way to do so??
tnx in aadvance
<include layout="#string/xmlName"/>
This is not the right way to change the view by changing the string. More over you should not give layout id like this.
At runtime you have to inflate new view to the include tag.
<include
android:id="#+id/my_include_view"
layout="#layout/xyz_layout"/>
View view = findViewById(R.id.my_include_view);
view .removeAllViews();
LayoutInflater layoutInflater = (LayoutInflater)
this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view .addView(layoutInflater.inflate(R.layout.new_layout, this, false) );
I want to show a view that should be shown in all activities. I don't know how to inherit views in android. What i did is below, its showing the view in first activity but not in all activities. This pease of code is form my BaseActivity, please help
LayoutInflater inflater = getLayoutInflater();
View child = inflater.inflate(R.layout.custom_error, null);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams( LayoutParams.WRAP_CONTENT , LayoutParams.WRAP_CONTENT );
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
addContentView(child, params);
You could get an Android specific View in the Activity. For example the following code below will add a TextView to the Activity's content area.
TextView tvSample = new TextView(this);
tvSample.setText("Hello!");
((ViewGroup) hostActivity.findViewById(android.R.id.content)).addView(this);
Whereby hostActivity is your current Activity and android.R.id.content is a specific element (the content area, not including the ActionBar).
Alternatively, as already stated, make use of <merge> and <include> tags in your layout XMLs.
you can do this with two solution
for programmatically
1)After adding child view to you parent View need to call setContentView(parentView) and pass you parent layout to it.
and With XMl
2) You can use include tag. follow this link will help you.
http://developer.android.com/training/improving-layouts/reusing-layouts.html
Have you tried 'include' tag of xml? It will do the job.
<include
android:id="#+id/container_header_lyt"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_above=...
android:layout_toLeftOf=...
layout="#layout/header_logo_lyt" //Name of the xml layout file you want to include
/>
In the layout/xxxx use the name of your layout file that should be repeated.
After use the above code in your xml file like any other widget.
When you want to show it:
FrameLayout rootLayout = (FrameLayout)findViewById(android.R.id.content);
View.inflate(this, R.layout.overlay_layout, rootLayout);
Then when you want to remove it:
FrameLayout rootLayout = (FrameLayout)findViewById(android.R.id.content);
rootLayout.removeViewAt(rootLayout.getChildCount()-1);
That's a concise solution, you should remove the View by giving the RelativeLayout an id in the XML file, then remove by: rootLayout.removeView(findViewById(R.id.the_id_of_the_relative_layout));.
Answer by nmw
I've an activity.java file in which my setContentView(R.layout.x); Now,I've an y.xml in which I've an Linear Layout,I've to attach an onclick() method to my view.
Attaching onclick() has to be in my activity.java file, How do I include y.xml.
I tried this,
1. layout = (LinearLayout) findViewById(R.layout.y);
eView = (EditText)layout. findViewById(R.id.editview);
2. eView = (EditText)findViewById(R.id.editview);
but both gives my null pointer exception, How do I include my editText
Update
final LayoutInflater lyInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
showLinearLayout = (LinearLayout) lyInflater.inflate(R.layout.y, null);
showView = (EditView) showLinearLayout.findViewById(R.id.edittext);
You can use inflation as shown below:
final LayoutInflater lyInflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LinearLayout yLayout = (LinearLayout) lyInflater .inflate(
R.layout.y, null);
eView = (EditText)yLayout.findViewById(R.id.editview);
So you won't get exception anymore. Hope it helps.
LayoutInflater is used to instantiate layout XML file into its corresponding View objects.in other words, it takes as input a XML file and builds the View objects from it.
in your scenario, you have to use LayoutInflater. read this article.
Ram.
If you want to include y xml file into your x xml file then follw this steps.
I am assuming that you want to include Linear Layout into your Activity on click of onclick() method of the button or whatever, then add the Linear Layout into your x xml file and add the android:visibility="gone" so at begin you can not show the linearlayout.
<LinearLayout
android:id="#+id/history_value_body"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:visibility="gone" > <<<<<<<<<<< HERE
----------------------------
-----------------------------
</LinearLayout>
Now, From the java class make it visible when needed, in your case into onclick method.
Like...
linear.setVisibility(View.VISIBLE); // linear is the object of your Linearlayout
If any prob then ask me.
Good Luck.
If I understand the question correctly, your Activity uses x.xml, and you also want to include another layout that is defined in y.xml.
You can do so using the <merge> or <include> tags, as described in the documentation.
Alternately, you can use a ViewStub to conditionally inflate another layout in a given place in a layout. For example, you can include a ViewStub tag in x.xml, and inflate y.xml in the same spot in the view hierarchy. Then, you may attach any click listeners you need (by using findViewById()).
You can use addView method of ViewGroup.
addView(layout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
Can anybody please tell What Inflator is and how it is being used in an Android application?
I don't know the exact use of it and Why it is being used.
My preferred way to handle inflation:
//First get our inflater ready, you'll need the application/activity context for this
LayoutInflater mInflater;
mInflater = LayoutInflater.from(mContext);
//Inflate the view from xml
View newView = mInflater.inflate(R.layout.my_new_layout, null);
//Then you'll want to add it to an existing layout object
mMainLayout.add(newView);
//Or perhaps just set it as the main view (though this method can also
// inflate the XML for you if you give it the resource id directly)
setContentView(newView);
Basically, you use it to inflate existing xml layouts at runtime. Usually you go ahead and insert those new views into previously defined ViewGroups or List objects.
Not quite sure what you mean, but if its related with inflating views, its used to load layout xml files into your application. e.g by
View myWelcome = View.inflate(this, R.layout.welcome, null);
Its easier and consider best practice to have you view definition inside layout xml files, instead of creating your views fully by code.
layout inflator is used to return a java object of your complete layout
suppose you have a layout xml file in which the root element is relative layout and it contains a imageview and textview then using layout inflator you can return a view object that refers to entire layout.
this basically is used in list view and grid view to plug into them a layout object of single row or element which is to be repeated.
you were asking for use of Inflator..
basically when you want to use two xml files in one java class ,inflator is used and its code is simple which is given below..
TextView text;
View layout;
LayoutInflater inflator=getLayoutInflater();
layout =inflator.inflate(R.layout.new_xml_that you want to use in that java class,null);
text=(TextView)layout.findViewById(R.id.text);
text.setText("progressing");
here i use textview,this is present in next xml with id=text
thats it..
if you find this worthy then please like this..
thanks
How can I reference the Activity View from within the onCreate() method so I can use view.setKeepScreenOn().
You can get a specific view defined in your xml file like:
View view = findViewById(R.id.my_view);
You could also use android:keepScreenOn in your layout xml to have it set automatically when your layout is inflated. See the docs.