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
Related
I want to know, there is a linearlayout and use that with setContentView function. Also there is a spinner inside of linearlayout. What I want to do is, create a new layout inside of /res/layout folder and add it into layout that I set with setContentView.
Is there anyway or I need to do that programmatically?
EDIT:
I think I couldn't tell.
I have 2 two layouts(ready). I use the first layout with setContentView.For example, there is a buton and if user click that button, I want to add second layout bottom of first layout when application running.
Easiest you do that with include in the xml of your main layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<include layout="#layout/second" />
</LinearLayout>
It´s also possible to do it programmatically, but this way I think it is more clear.
Edit:
To do this programmatically, put this code in listener of the first button.
RelativeLayout view = (RelativeLayout) findViewById(R.id.RelativeLayout1);
Button b = new Button(getApplicationContext());
b.setText("Click me too!");
view.addView(b);
Instead of creating a button (or whatever you want) you can also inflate a premade layout.
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = inflater.inflate(R.layout.second, null);
view.addView(v);
I don't think you can change the res folder programmatically. You need to add any layout programmatically only.
Edited:
Get the 2nd layout's instance using findViewById and use setVisibility method to control the layout's visibility.
I got a relative layout which contains another relative layout which I used to replace the "title", a linearLayout which I will use later as a "control panel", and a horizontalScrollView, where the horizontalScrollView contains a LinearLayout(let's name this linear layout - "hsc".
I also have another xml layout file named "entries" that contains an imageView.
My question is, how do i attach "entries" inside "hsc"? Or how to I populate "hsc" with multiple "entries"?
My main layout's structure looks something like this:
<RelativeLayout>
<relativeLayout1>
<linearLayout>
<horizontalScrollView1>
<hsc>
Thanks!
Try to use LayoutInflater. First get the hsc in code somehow like this
LinearLayout layout = (LinearLayout) findViewById(R.id.hsc_id);
Then you make new entrie
LayoutInflater inflater = (LayoutInflater)context.getSystemService
(Context.LAYOUT_INFLATER_SERVICE);
View entrie = inflater.inflate(R.layout.entries,
null, false);
and put one into another
layout.addView(entrie);
you can add multiple views by repeating child view creation process.
If your are going to populate the view, you may want to use a ListView (FragmentList or ListActivity).
In which case you use the tag
<RelativeLayout>
<relativeLayout1>
<linearLayout>
<horizontalScrollView1>
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
And then load the list with an Adapter.
http://www.vogella.com/articles/AndroidListView/
Your question seem to imply that you some-how need to traverse the xml tree, you don't, you just use android:id to find the resource from the code side.
create a linear layout dynamically and add some view in that.....
LinearLayout layoutContainer=new LinearLayout(your_activity.this); //create a linear layout dynamically
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.gravity = Gravity.RIGHT;
layoutContainer.setLayoutParams(lp);//apply attributes to your linear layout
View viewOther = LayoutInflater.from(your_activity.this)
.inflate(R.layout.layout_to_add, layoutContainer);//add some view to your linear_layout.
hope it helps....!
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));
Refer to the doc: http://android-developers.blogspot.com/2009/02/android-layout-tricks-2-reusing-layouts.html
I have a button inside the included layout, how can I access the button? I don't know the id! How can I define the OnClickListener...?
Please help...
The id you have with the include tag is assigned to the root View of the included layout.
First get a reference to that View using findViewByid. Then you can call findViewById on that specific View to get a reference to a View inside the layout. So:
View myLayout = findViewById( R.id.cell1 ); // root View id from that link
View myView = myLayout.findViewById( R.id.someinnerview ); // id of a view contained in the included file
All you need is the id of the parent view:
In this example, the LinearLayout is the parent of the TextView I want from the included View.
I can now do this:
View view = findViewById(R.id.include_title_layout);
TextView titleTV = (TextView) view.findViewById(R.id.newsTitleTextView);
titleTV.setText("Whatever");
You do know the id of the include. You can get that complete element, and then get one of its children starting from there.
Actually include tags include all the elements in your root layout. So you can always access them using findViewById on your Activity.
Suppose you have a alayout.xml in which there is a include layout. Now in one of your activity A,inside onCreate you declared setContentView(R.layout.alayout) Now inside your include layout you might have a button with id myBtn. You can access that inside onCreate in the same way you could access it if it were in main layout: findViewById(R.id.myBtn)
i think your mean is NavigationView. you can access to inner layout by this way:
NavigationView ngv= (NavigationView) findViewById(R.id.navigation_id);
View innerview = ngv.getHeaderView(0);
TextView user_view= (TextView)innerview.findViewById(R.id.nav_name); //any you need
user_view.setText(user);
works for me in java
<include
android:id="#+id/layout_infoProfile"
layout="#layout/user_info_doctor_profile_layout"
/>
preferences = mContext.getSharedPreferences(MyConstant.MY_SHARED_PREF,Context.MODE_PRIVATE);
View view = mView.findViewById(R.id.layout_infoProfile);
((TextView)view.findViewById(R.id.tv_name)).setText(preferences.getString(MyConstant.ROLE,MyConstant.NO_VALUE));
I have a custom view (an extension of a TextView) that I want to dynamically add to my Layout (don't want to include it in the main.xml file).
The book says to fetch the RelativeLayout using findViewById() in my java code then create a new instance of my custom view, then use addView on the RelativeLayout to add the new view.
I'm not getting any errors, but when I click my button to add the new view, nothing is happening (view isn't being added). Do I need to set additional properties on my custom view (layout width, layout height for example) in order for it to be shown?
EDIT: adding code
// changed to an imageview as I thought it might be easier to see an image
RelativeLayout rel = (RelativeLayout) findViewById(R.id.rellay);
MyCustomImageView mciv = new MyCustomImageView(null);
mciv.setId(5);
LayoutParams p = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
mciv.setLayoutParams(p);
mciv.setImageResource(R.drawable.someImage);
rel.Addview(mciv);
Please post your code where you add the view.
But yes, you might be missing the params for width and height. Try something like
LayoutParams p = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.FILL_PARENT);
txtView.setLayoutParams(p);
or what you would like the width and height to be. Also in xml layout, layout_width and layout_height are required attributes.