I would like to position a view below an action bar with overlay. Is there a way of doing this via XML layout?
I would like to avoid using constants as there are already at least 4 possible values and that number is likely to grow.
Compatibility with ActionBarSherlock is a plus.
android:layout_marginTop="?attr/actionBarSize"
This will account for changes in size based on screen configuration automatically. You can see a demo of its use in the "Overlay" example of the 'Demos' sample that comes with ActionBarSherlock.
Jake Wharton's answer does not work if you're handling configuration changes.
This is how I solved this problem by code, in case it helps anyone:
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
layoutTheView();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
layoutTheView();
}
private void layoutTheView() {
ActionBar actionBar = this.getSupportActionBar();
ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) mTheView.getLayoutParams();
int actionBarHeight = actionBar.getHeight();
params.setMargins(0, actionBarHeight, 0, 0);
mTheView.setLayoutParams(params);
mTheView.requestLayout();
}
use padding top
android:paddingTop="50dp"
Related
When I switch from landscape to portrait mode, View.fitSystemWindows() is not called. Therefore my view becomes offset with no reason because the navigation bar is not at the same place as it used to be :-(. I tried calling View.requestFitSystemWindows() but that did not make anything. Any idea what could be wrong ?
I workarounded that by calling setPadding manually
#Override
protected void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
setPadding(0, 0, 0, 0);
}
Not sure this is the nicest solution but it works for me...
I have an activity whose layout I need to change after a rotation and part of the layout is a graph that is drawn using the width and height of the view that it will be placed into. The first time my code runs, the graph is drawn correctly, however after the rotation the width and height of the container view are not correct, in fact they appear to be the view as if it was not rotated.
Here is what I have so far,
In my manifest for the activity I am working:
android:configChanges="keyboardHidden|orientation|screenSize"
In my activity I have these following methods:
onCreate
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle extras = getIntent().getExtras();
patient_id = extras.getInt("patient_id");
patient_name = extras.getString("patient_name");
historyDurationType = 12;
constructLayout();
}
constructLayout
public void constructLayout(){
if(landScape){
setContentView(R.layout.activity_bg_history_static_land);
//Set buttons
btnTwelve = (Button)findViewById(R.id.btnTwelveHoursLand);
btnTwentyFour = (Button)findViewById(R.id.btnTwentyFourHoursLand);
btnSeven= (Button)findViewById(R.id.btnSevenDaysLand);
btnTwelve.setOnClickListener(this);
btnTwentyFour.setOnClickListener(this);
btnSeven.setOnClickListener(this);
btnTwelve.setBackgroundColor(getResources().getColor(R.color.light_blue_regular));
btnTwentyFour.setBackgroundResource(android.R.drawable.btn_default);
btnSeven.setBackgroundResource(android.R.drawable.btn_default);
}else{
setContentView(R.layout.activity_bg_history_static);
//Set buttons
btnTwelve = (Button)findViewById(R.id.btnTwelveHours);
btnTwentyFour = (Button)findViewById(R.id.btnTwentyFourHours);
btnSeven= (Button)findViewById(R.id.btnSevenDays);
btnTwelve.setOnClickListener(this);
btnTwentyFour.setOnClickListener(this);
btnSeven.setOnClickListener(this);
btnTwelve.setBackgroundColor(getResources().getColor(R.color.light_blue_regular));
btnTwentyFour.setBackgroundResource(android.R.drawable.btn_default);
btnSeven.setBackgroundResource(android.R.drawable.btn_default);
btnComment = (Button)findViewById(R.id.btnCommentGraph);
btnComment.setOnClickListener(this);
populateOtherContent(officialReadings12);
TextView tvStats = (TextView)findViewById(R.id.txtStatistics);
Typeface chunkFiveFont = Typeface.createFromAsset(getAssets(), "fonts/chunkfivettfversion.ttf");
tvStats.setTypeface(chunkFiveFont);
TextView tvReading = (TextView)findViewById(R.id.txtReadingTitle);
tvReading.setTypeface(chunkFiveFont);
comment = null;
}
if(needData){
getLatestReadings();
}
populateGraph();
}
populateGraph
public void populateGraph(){
if(landScape){
graph_container = (LinearLayout)findViewById(R.id.graph_land_content_layout);
}else{
graph_container = (LinearLayout)findViewById(R.id.graph_content_layout);
}
//Create graphlayout
mainGraph_Layout = new RelativeLayout(this);
RelativeLayout.LayoutParams glParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
mainGraph_Layout.setId(909);
mainGraph_Layout.setLayoutParams(glParams);
graph_container.addView(mainGraph_Layout);
graph_container.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
if(needsGraph){
layoutGraph();
needsGraph = false;
}
}
});
}
layoutGraph
public void layoutGraph(){
viewWidth = mainGraph_Layout.getWidth();
viewHeight = mainGraph_Layout.getHeight();
//MORE STUFF IS HERE BUT NOT IMPORTANT
}
onConfigurationChanged
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
ActionBar actionBar = getActionBar();
if(newConfig.orientation==Configuration.ORIENTATION_LANDSCAPE){
//Config is landscape here
actionBar.hide();
needData = false;
landScape = true;
needsGraph = true;
constructLayout();
}else{
//Config is portrait here
actionBar.show();
needData = false;
landScape = false;
needsGraph = true;
constructLayout();
}
}
After rotation, it is at the layoutGraph() viewWidth and viewHeight objects where I have the problem. I had assumed by that point (having used the global layout listener) that the values would be correct. My understanding was that the listener would only have been triggered once "graph_container" was completed (and landscape or portrait) and so when calling layoutGraph() the width and height of "mainGraph_layout" (a child a graph_container, widths and heights set to MATCH_PARENT) would be good to go. It appears that the width and height I am getting are as if the phone is still portrait, and worth noting it appears that the removal of the action bar has also been taken into account.
Sorry for the long question but I thought it best to show all the code. If anything else needs to be shown then please let me know.
Thanks in advance,
Josh
There is a much better way to do this.
Use resource folders
Put your default layout files in res/layout, and the ones for landscape in res/layout-land. In other words, move res/layout/activity_bg_history_static_land.xml to res/layout-land/activity_bg_history_static.xml.
In onCreate, call
setContentView(R.layout.activity_bg_history_static);
The system will pick the file from res/layout-land when you are in landscape orientation, res/layout otherwise.
If you have views that are only present in one layout but not the other e.g. the comment button, wrap the code inside a null check like this:
btnComment = (Button) findViewById(R.id.btnCommentGraph);
if (btnComment != null) {
btnComment.setOnClickListener(this);
}
For populateGraph(), make sure both res/layout/activity_bg_history_static.xml and res/layout-land/activity_bg_history_static.xml has android:id="#+id/R.id.graph_content. Then you can do findViewById(R.id.graph_content) and get the LinearLayout you need.
Save data across rotation
In your activity, override onSaveInstanceState(), and save the data from getLatestReadings() into the bundle.
Then, in onCreate:
if (savedInstanceState == null) {
getLatestReadings();
} else {
// Restore latest readings from savedInstanceState
}
With that, you can let the system handle the rotation i.e. remove this from your manifest:
android:configChanges="keyboardHidden|orientation|screenSize"
Since the system is handling the rotation, you don't need to have a view tree observer any more. And you don't have to override onConfigurationChanged.
I'm using SwipeView (http://jasonfry.co.uk/blog/android-swipeview/) inside my activity's layout to display several pages. Moreover, I want to handle the orientation changes manually so I added
android:configChanges="orientation|keyboardHidden|screenSize"
into the application's manifest, so that onDestroy/onCreate are not called. Unfortunately, by doing this, the elements inside the swipeview are not resized accordingly. I already tried the following methods:
invalidate
requestLayout
forceLayout
None of them did the trick!
Any help would be appreciated.
Thanks
In case anyone struggles with this, I finally found a solution.
The trick was to request layout not on the swipeview itself but rather on getChildContainer().
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
SwipeView swipeView = (SwipeView)findViewById(R.id.swipeView);
int pageWidth = ((WindowManager)getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getWidth();
swipeView.setPageWidth(pageWidth);
for ( int i = 0; i < swipeView.getChildContainer().getChildCount(); i++ )
swipeView.getChildContainer().getChildAt(i).getLayoutParams().width = pageWidth;
swipeView.getChildContainer().requestLayout();
swipeView.scrollToPage(swipeView.getCurrentPage());
}
I'm using Actionbarsherlock and I want to place a PopupWindow right below the action bar. Using the showAtLocation() takes an x and y offset, so ideally the y offset would be the height of the action bar. But when I call
int abHeight = getSupportActionBar().getHeight();
it returns zero. I'm using a SherlockFragmentActivity
Here's the relevant code:
slidingLayout = inflater.inflate(R.layout.sliding_menu, null);
menuDrawer = MenuDrawer.attach(this, MenuDrawer.MENU_DRAG_CONTENT, Position.LEFT);
menuDrawer.setContentView(R.layout.activity_main);
menuDrawer.setMenuView(slidingLayout.findViewById(R.id.sliding_menu));
getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
int abHeight = getSupportActionBar().getHeight();
I've looked all over and can't find a similar question/answer, so has anyone experienced this before? Thanks.
EDIT: Jake's answer was right on. In order to get that attribute value I used this post.
You can read the height of the action bar from the actionBarSize theme attribute. This changes based on the device configuration so make sure you are always reading it when your activity is created or recreated.
in you style.XML add: <item name="#android:attr/actionBarSize">50px</item>
and then in your activity add the following code :
TypedArray actionbarSizeTypedArray = mContext.obtainStyledAttributes(new int[] { android.R.attr.actionBarSize});
int h = (int) actionbarSizeTypedArray.getDimension(0, 0);
this is one kind ,I am trying to get other ways.Good luck!
Yeah!I find a way very simple:
TypedValue tv = new TypedValue();
if (getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true))
{
int h=TypedValue.complexToDimensionPixelSize(tv.data,getResources().getDisplayMetrics());
}
more info,look this link
You can't get the height for views until they have been layed out. Try adding a ViewTreeObserver:
someView.getViewTreeObserver().addGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
// Remember to remove it if you don't want it to fire every time
someView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
int abHeight = getSupportActionBar().getHeight();
// Use the height as desired...
}
});
Refer to the docs starting at View.getViewTreeObserver().
I have a problem, and I can't seem to figure out what to do about it.
I'm new to developing with Android, but I have experience with Java.
During the onCreate(bundle), onPostCreate(bundle) or any other similar method, I can't get the correct width of a View. It returns 0. I also made a simple button for debug purposses, and that button returns the correct value.
How do I call a method that gets the width of a View after the onCreate method?
If that's not possible, what is a workaround?
Thanks in advance,
Gerralt
The problem is because, you are trying to find out the width as soon as you you start your activity.
But at this position the actual transformation of your view wouldn't have occurred. Android provides a special callback to find the width and height of all individual views. To access it, you have to override the onWindowFoucsChanged() method. Here is a sample,
#Override
public void onWindowFocusChanged(boolean hasFocus)
{
// TODO Auto-generated method stub
super.onWindowFocusChanged(hasFocus);
System.out.println("...Height..."+textview.getMeasuredWidth());
}
This line textview.getMeasuredWidth() helps you to find the actual width of the textView at runtime. Similarly you can find the width and height for any view using this method.
As i think, you are in the onCreate(Bundle) method:
public void onCreate(Bundle xxx) {
super(xxx);
// init some stuff here
setContentView(R.layout.my_layout);
// from THIS point you can get sizes of Views
}
Sorry if i'm wrong, but on my project it works. OK, i have to say i use often
custom views and use sizes not in my activity code but in View code.
Do this is onWindowFocusChanged() like this:
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if(hasFocus && llfullscreen!=null){
int layoutHeight = llfullscreen.getHeight();
ViewGroup.LayoutParams params = lv.getLayoutParams();
params.height = lv/2; //Set to half the screens size
this.lv.setLayoutParams(params);
this.lv.invalidate();
}
}