I am writing an app, where in a game a score is counted and displayed.
Now I would like to give the opportunity to switch ON/Off the speakers. I think, to use an ImageButton should be the solution.
But how do I "dim" the button, when speaker is Off, but the button has to remain active. invisibility or disable is not the solution. Is ist best, to change the Image in the button?
Does anybody has an example for a switch On/Off button please.
I am working on AndroidStudio4.1 and Kotlin
Is better to have a checkbox, because that view handles true/false states by default. You have to create a drawable for the button and then set it as a button.
Let's say your drawable is cb_selector_sound
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/ic_sound_on" android:state_checked="true" />
<item android:drawable="#drawable/ic_sound_off" android:state_checked="false" />
</selector>
and then use it in the button like this:
<CheckBox
android:id="#+id/soundCheckbox"
android:button="#drawable/cb_selector_sound"
.../>
So then you can listen the checkbox changing
//find the view
soundCheckbox.setOnCheckeChangedListener {_, isChecked ->
if (isChecked) {
//turn sound on
} else {
//turn sound off
}
}
So the view worries about the appearance and you worried about the logic
Related
I would like to transition between two activities(Activity A and Activity B).Activity A contains a floating action button (FAB) on the bottom right.
When the FAB is clicked, the FAB should transform into a new surface that spans the entire screen and that entire screen is Activity B.
When the back button is pressed in Activity B then the whole screen surface should shrink back to FAB which is now Activity A.
How can I do that?
Yes. You can actually do that with the Shared Element transitions in android.
It's easy to use. Just follow the steps:
Enable Window Content Transitions in your style XML which you are using in the activity.
<style name="AppTheme" parent="Theme.MaterialComponents.DayNight.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
<!-- Define the attribute here. -->
<item name="android:windowContentTransitions">true</item>
</style>
Set the common transition name in both your views. For example, You want to animate FAB to the full screen view of Activity B. So you have to apply the transition name to your FAB & the parent view of Activity B.
<LinearLayout ...>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="16dp"
android:transitionName="transition_fab"/>
...
</LinearLayout>
Now in your activity xml of Activity B.
<RelativeLayout
android:id="#+id/root_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:transitionName="transition_fab"/>
<TextView
... />
</RelativeLayout>
Now, Open Activity with the Element Transition, Create ActivityOptions in Activity A and put the common object name in it like shown below.
FloatingActionButton fab = findViewById(R.id.fab);
Intent intent = new Intent(ActivityA.this, ActivityB.class);
ActivityOptions options = ActivityOptions
.makeSceneTransitionAnimation(this, fab, "transition_fab");
startActivity(intent, options.toBundle());
And that's it! You can now see your FAB animating from Activity A to the Full screen in Activity B.
You can find more details about the Shared Element Transition here - Android Shared element transitions
I hope to find answer of this question and any help will be appreciated,
when i use blank\empty activity the icon of the menu item doesn't appear !
but using basic activity it works fine .
thanks in advance .
this is the menu xmlcode
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="#+id/one"
android:icon="#drawable/images"
android:showAsAction="always"
android:title="one"
/>
its works as i said for basic Activity but its not for empty\blank Activity
for the appearance of the menu icon
xmlns:app="http://schemas.android.com/apk/res-auto" put this in menu before your item tag and use 'app:' instead of 'android:' at "showAsAction" LIKE
use this:
app:showAsAction="always"
instead of
android:showAsAction="always"
scratching my head. if someone could help that would be great. I am switching from extends ActionBarActivity to extends AppCompatActivity with Toolbar and need help displaying items on toolbar.
I am using extends AppCompatActivity included android.support.v7.app.AppCompatActivity; then inside onCreate() have:
Toolbar jobListToolbar = (Toolbar) findViewById(R.id.job_list_toolbar);
setSupportActionBar(jobListToolbar);
then in xml file I have
<android.support.v7.widget.Toolbar
android:id="#+id/job_list_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"/>
then in menu file I have items and everything seems to work, however not the way I want.
Toolbar/ActionBar is displayed on top of the screen, but no menu items showing on it. If I press phone original menu button then onCreateOptionsMenu(Menu menu) is initiated for the first time, and menu is showing. But it shows just above this phone button. But I want those buttons to show on Toolbar/ActionBar on top of the screen. I read somewhere that if phone has hardware menu button it will not show menu items in Toolbar/ActionBar, but I had it somehow done with extends ActionBarActivity, but there should be a way to do this with extends AppCompatActivity. Need to move to newer recommended way by google, but not sure how to show items on that Toolbar/ActionBar on the top of the screen.
After a day of research on how to switch to AppCompat Toolbar finally found the solution. Two must do steps (No 2 being the one that nobody talks about):
I.) couple good resources on how to set up Toolbar can be found in this video Toolbar Tutorial and also in this StackOverflow: toolbar button
II.) MAKE SURE YOU PLACE THIS CODE AT THE BOTTOM OF onCreate():
toolbar= (Toolbar) findViewById(R.id.job_list_toolbar);
setSupportActionBar(toolbar);
if(getSupportActionBar()!=null) {
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
My problem was that I had some code in onCreate() that modified the toolbar buttons. That code needed to be run before toolbar was opened. If only first two lines of the code above included toolbar will show, but no menu will be inflated and no buttons. When I called getSupportActionBar().setDisplayShowHomeEnabled(true); thats when onCreateOptionsMenu(Menu menu) is called (if no true enabled it is not called), also make sure you have getMenuInflater().inflate(R.menu.job_list, menu); inside onCreateOptionsMenu(Menu menu).
If the code that calls for menu to open getSupportActionBar().setDisplayShowHomeEnabled(true); is not at the end of onCreate() you might be scratching your head why the menu is not showing. So make sure you execute your relevant onCreate() code before you call the menu to open.
MyActivity:
extends AppCompatActivity
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbarhome);
setSupportActionBar(toolbar);
activity_my.xml: If you want you can delete the last line 0 ep. They are the starting point of 0 to launching toolbar
<android.support.v7.widget.Toolbar
android:id="#+id/toolbarhome"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/AppTheme.PopupOverlay"
app:titleTextAppearance="#style/Toolbar.TitleText"
app:layout_collapseMode="pin"
android:background="#color/colorPrimary"
android:contentInsetLeft="0dp"
android:contentInsetStart="0dp"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
android:contentInsetRight="0dp"
android:contentInsetEnd="0dp"
app:contentInsetRight="0dp"
app:contentInsetEnd="0dp" >
//designed the way you like
</android.support.v7.widget.Toolbar>
manifest:
<activity
android:name=".MyActivity"
android:theme="#style/AppTheme.NoActionBar"/>
style:
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light"> </style>
<style name="Toolbar.TitleText" parent="TextAppearance.Widget.AppCompat.Toolbar.Title">
<item name="android:textSize">20sp</item>
<item name="android:textStyle">italic</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
I am trying to inflate a menu when selecting items from the list for multiple deletion, but instead I get a new menu bar on top of the current one.
http://imgur.com/XRAEnBM.jpg
I used the default navigation drawer activity and then made my fragments.
I am using listView.setMultiChoiceModeListener this is my code
Java Code:
#Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
mode.getMenuInflater().inflate(R.menu.delete, menu);
return true;
}
XML Code in menu:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/delete_id"
android:title="Delete"
android:icon="#drawable/ic_action_delete"/>
</menu>
The Java code happens in on onResume() in one of my fragments.
I am a beginner so please be kind thanks :)
Here is the solution, just add these two lines in your stlyes
<item name="windowActionModeOverlay">true</item>
<item name="actionModeBackground">#color/colorPrimary</item>
I had developed an Android app that works fine on smartphones. When trying on Amazon Fire TV, I see that no view has focus on launch and the key presses on the remote controller don't have any effect. How can I make an item on the action bar have focus (the action item should have focus, namely blue lines around it). Since no view seems to have focus, the remote controller does not work.
Do I have to add something to the layout code, which is as follows:
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="#+id/menu_item_favorites"
android:icon="#drawable/ic_action_favorites"
android:title="#string/favorites"
android:showAsAction="always" />
...
...
...
</menu>
or do I have to set focus programmatically in onCreate or onStart?