I want to change the back button color in the ActionBar with SherlockActivity.
The problem is that I have use DarkActionBar but if I put the following code (to show the back button):
// OnCreate
getSupportActionBar().setDisplayHomeAsUpEnabled(true)
getSupportActionBar().setHomeButtonEnabled(true);
//
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
the back button appear, but appear with dark color and I am using DarkActionBar, so I want to change to light color
I have search in internet and I found this:
<item name="android:homeAsUpIndicator">#drawable/ic_action_previous_item</item>
in values/styles, but compiler say me that it requires minimun 11 Api level and my cuestion is:
why in Api level lower than 11 I can use back button but I can't change his color?
And if I agree
<item name="android:homeAsUpIndicator">#drawable/ic_action_previous_item</item>
in values, for example, v-14 it doesn't work, color is still dark.
what can I do?
Related
I'm using barteksc pdf viewer library to load pdf in my application.
pdfView = findViewById(R.id.pdfView);
pdfView.fromAsset(getResources().getString(R.string.pdfname))
.enableDoubletap(true)
.enableSwipe(true)
.defaultPage(pageNumber)
.onPageChange(mainreading.this)
.pageFitPolicy(FitPolicy.WIDTH)
.pageFling(true)
.linkHandler(null)
.enableAnnotationRendering(true)
.swipeHorizontal(true)
.scrollHandle(new DefaultScrollHandlenew(mainreading.this))
.enableAntialiasing(true)
.load();
}
I want pdf to start scroll automatically when user click the button of volume up and down buttons to start stop. I tried with below code while wrapping it in the handler with handler.performClick(); but it shows blank screen while scrolling up and down.
scrollbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
pdfView.scrollTo(0, pdfView.getScrollY() + 24);
}
});
Example :
https://play.google.com/store/apps/details?id=com.emptysheet.pdfreader_autoscroll&hl=en&gl=US
I want to make as like this. Can anyone help please.
Also tried with this. But it shows blank page after some scrolls.
#Override
public boolean dispatchKeyEvent(KeyEvent event) {
int action = event.getAction();
int keyCode = event.getKeyCode();
switch (keyCode) {
case KeyEvent.KEYCODE_VOLUME_UP:
if (action == KeyEvent.ACTION_DOWN) {
pdfView.scrollTo(0, pdfView.getScrollY() -24);
}
return true;
case KeyEvent.KEYCODE_VOLUME_DOWN:
if (action == KeyEvent.ACTION_DOWN) {
pdfView.scrollTo(0, pdfView.getScrollY() + 24);
}
return true;
default:
return super.dispatchKeyEvent(event);
}
}
You can simply use this PDF viewer from github.
It's based on the same 'barsteksc' pdf viewer with the feature to jump to any pages.
It's MagicalPdfViewer and you can use 'jumpTo(pageNo)' method to simply jump to the specific page. It also gives you the option to animate to the specific page with the same method, just pass 'true' as the 2nd parameter.
Moreover, if you pass the values like '-1' and 'bigger than pageNo', It will automatically scroll to the 0 & last page respectively.
Give it a try & let me know if you got what you wanted.
I'm searching for ways to implement a swipe gesture recognizer which only triggers when you swipe from the outer left side of the screen to the right. We need the gesture to open our custom SideMenu. I tried to use a simple UISwipeGestureRecognizer with the SwipeDirection property set to right, but that gets triggered on every swipe from left to right, no matter what the startpoint of the swipe is.
Ideally, we want the animation of it to look and feel like the InteractivePopGestureRecognizer of a UINavigationController. We are already using a NavigationController, which pushed our MainView over our IntroView. Now, we disable the InteractivePopGestureRecognizer, so you aren't able to go back to the IntroView. That's our problem. If it is possible, we don't want to disable the gesture of the NavigationController, but change the action of it. So the swipe from the far left side of the screen to the right would not pop the current viewcontroller, but open our SideMenu.
Is it possible to override the InteractivePopGestureRecognizer to change the action of it? If this isn't possible, do you have another idea on how to create the exact same gesture recognizer? It has to be possible somehow because many apps only open their SideMenu if your startpoint of the gesture is the left (or right) side of the screen. (e.g. Reddit)
Thanks for any help in advance.
You could use Touch Events and UISwipeGestureRecognizer to do that.
The workaround that is override TouchesBegan method to detect the started point whether fit your needs, and if so add UISwipeGestureRecognizer for View.
SwipeGestureRecognizer rightSwipeGesture;
public override void TouchesBegan (NSSet touches, UIEvent evt)
{
base.TouchesBegan (touches, evt);
UITouch touch = touches.AnyObject as UITouch;
if (touch != null)
{
//code here to handle touch
CoreGraphics.CGPoint swipPoint = touch.LocationInView(View);
if(swipPoint.X < 0.5)
{
rightSwipeGesture = new SwipeGestureRecognizer { Direction = SwipeDirection.Right };
rightSwipeGesture.Swiped += OnSwiped;
View.AddGestureRecognizers(rightSwipeGesture);
}
}
}
public override void TouchesEnded (NSSet touches, UIEvent evt)
{
base.TouchesBegan (touches, evt);
if(null != rightSwipeGesture ){
rightSwipeGesture.Swiped -= OnSwiped;
View.RemoveGestureRecognizers(rightSwipeGesture);
}
}
=============================Update=================================
I found a workaround only use one GestureRecognizer will make it works. You could have a look at UIScreenEdgePanGestureRecognizer. Although it's a Pan gesture, however if you not deal with somethind with the added view, it will work as a swip gesture. In addition, UIScreenEdgePanGestureRecognizer only can work when on the screen edge. You could set the Left edge to handle your needs.
For example:
UIScreenEdgePanGestureRecognizer panRightGestureRecognizer = new UIScreenEdgePanGestureRecognizer();
panRightGestureRecognizer.Edges = UIRectEdge.Left;
panRightGestureRecognizer.AddTarget(() => HandleSwap(panRightGestureRecognizer));
View.AddGestureRecognizer(panRightGestureRecognizer);
private void HandleSwip(UIScreenEdgePanGestureRecognizer panRightGestureRecognizer)
{
Point point = (Point)panRightGestureRecognizer.TranslationInView(View);
if (panRightGestureRecognizer.State == UGestureRecognizerState.Began)
{
Console.WriteLine("Show slider view");
}
}
How can I dynamically hide the status and the navigation bar completely?
The app contains a regular navigation drawer with a appbar / toolbar and FAB buttons.
When switching to full screen, the content of the navigation and the status bar is scrolled away. Two empty bars are left on the screen. I want those empty bars to hide.
I created a minimal demo app. On the left is the regular app. When pushing on the fab, the app should be shown fullscreen.
How can I get the bars to hide?
QUESTION: Please write which change(s) are needed in the minimal demo project?
Updated with a second solution:
The GREAT solution provided by #Roaim works. Essential was to set the android:fitsSystemWindows layout property to false.
If you still have trouble with the showing and hiding of status/navigation bars, this solutin may help you.
Hide the bars completely:
public static void hideSystemUI() {
if (getSupportActionBar() != null) {
getSupportActionBar().hide();
}
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_IMMERSIVE
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN);
}
And show all bars:
public static void showSystemUI() {
if (getSupportActionBar() != null) {
getSupportActionBar().show();
}
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
}
Update
The issue was with your layout file. I just set android:fitsSystemWindows=false to fix the issue. I made a pull request to your repo, which I think solves your issue.
You should follow the following official documentations:
Hide the status bar
Hide the navigation bar
Hide the Status Bar on Android 4.0 and Lower
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// If the Android version is lower than Jellybean, use this call to hide
// the status bar.
if (Build.VERSION.SDK_INT < 16) {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
setContentView(R.layout.activity_main);
}
...
}
Hide the Status Bar on Android 4.1 and Higher
View decorView = getWindow().getDecorView();
// Hide the status bar.
int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
// Remember that you should never show the action bar if the
// status bar is hidden, so hide that too if necessary.
ActionBar actionBar = getActionBar();
actionBar.hide();
Hide the Navigation Bar
View decorView = getWindow().getDecorView();
// Hide both the navigation bar and the status bar.
// SYSTEM_UI_FLAG_FULLSCREEN is only available on Android 4.1 and higher, but as
// a general rule, you should design your app to hide the status bar whenever you
// hide the navigation bar.
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
Go in values>styles
Now In App theme use
To make navigation bar transculate
<item name="android:windowTranslucentNavigation">true</item>
To remove it make its color matched with your layout
<item name="android:navigationBarColor">#color/white</item>
OR Try this
public void FullScreencall() {
if(Build.VERSION.SDK_INT > 11 && Build.VERSION.SDK_INT < 19) { // lower api
View v = this.getWindow().getDecorView();
v.setSystemUiVisibility(View.GONE);
} else if(Build.VERSION.SDK_INT >= 19) {
//for new api versions.
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
decorView.setSystemUiVisibility(uiOptions);
}
}
Try this...
<style name="MyApp" parent="Theme.MaterialComponents.Light.NoActionBar">
...
<item name="windowNoTitle">true</item>
<item name="windowActionBar">false</item>
<item name="android:windowFullscreen">true</item>
...
</style>
Try this to hide/show statusbar and navbar, both are parts of SystemUI.
fun setSystemUIVisibility(hide: Boolean) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
val window = window.insetsController!!
val windows = WindowInsets.Type.statusBars() or WindowInsets.Type.navigationBars()
if (hide) window.hide(windows) else window.show(windows)
// needed for hide, doesn't do anything in show
window.systemBarsBehavior = WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
} else {
val view = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION or
View.SYSTEM_UI_FLAG_FULLSCREEN or
View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
window.decorView.systemUiVisibility = if (hide) view else view.inv()
}
}
Theme
<style name="Theme.FullScreen" parent="#style/Theme.AppCompat.Light.NoActionBar">
<item name="android:windowFullscreen">true</item>
<item name="android:windowTranslucentStatus">true</item>
<item name="android:windowTranslucentNavigation">true</item>
<item name="android:statusBarColor">#android:color/transparent</item>
<item name="android:navigationBarColor">#android:color/transparent</item>
<item name="android:windowLayoutInDisplayCutoutMode" tools:targetApi="o_mr1">shortEdges</item>
</style>
AndroidManifest
<activity android:exported="false"
android:name=".FullScreenActivity"
android:screenOrientation="fullSensor"
android:theme="#style/Theme.FullScreen"/>
I have a small problem: my text field keeps selecting itself, for example if I alt-tab from and to application.
For my application, text selection is not needed and will not be used - so I want to disallow this annoying behavior. Actually, just setting selection color to transparent or white will work fine.
Is there some way to do this?
The following css fixed the problem for me:
-fx-highlight-fill: null;
-fx-highlight-text-fill: null;
You can disable text selection for key events:
myTextField.addEventFilter(KeyEvent.KEY_TYPED, new EventHandler<KeyEvent>() {
#Override
public void handle(KeyEvent inputevent) {
if (!myTextField.getSelectedText().isEmpty()) {
myTextField.deselect();
}
}
});
For mouse events you could also use:
myTextField.addEventFilter(MouseEvent.MOUSE_DRAGGED, new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
if (!myTextField.getSelectedText().isEmpty()) {
myTextField.deselect();
}
}
});
Super late for an answer, but I have a better solution.
Instead of disabling the style for selected text or managing mouse events, it's better to directly manage the selectedTextProperty().
The advantages of this solution are:
The selection properties will always be empty selection
Double clicks are also covered, not only mouse drag events
The code...
textField.selectedTextProperty().addListener((observable, oldValue, newValue) -> {
if (!newValue.isEmpty()) textField.deselect();
});
I have red and green LinearLayouts, and I set ontouch listeners to them.
When I touch the green one its turns to white (no problem so far)
When I touch the red one it is also turning to white (no problem so far)
The problem is when I touch the green one and I drag my finger over the red one (meaning I do not release the finger I just move it over the red one) then in this kind of scenarion only the green one go to white but not the red one.
I hope I describe good, if you do not get my problem please ask me.
Thanks for the help
green.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
v.setBackgroundColor(Color.WHITE);
return true;
}
});
red.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
v.setBackgroundColor(Color.WHITE);
return true;
}
});
This is because the touch event started on the Green square and so moving your finger will only call touch events on the Green square. You could try to send a touch event to the red square within the code. But there is no standard way of doing it i think.