You can do this using the market://
prefix.
Java
final String appPackageName = getPackageName(); // getPackageName() from Context or Activity object
try {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
} catch (android.content.ActivityNotFoundException anfe) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + appPackageName)));
}
Kotlin
try {
startActivity(Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=$packageName")))
} catch (e: ActivityNotFoundException) {
startActivity(Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=$packageName")))
}
We use a try/catch
block here because an Exception
will be thrown if the Play Store is not installed on the target device.
NOTE: any app can register as capable of handling the market://details?id=<appId>
Uri, if you want to specifically target Google Play check the Berťák answer
I have fixed the issue, just to clerify, I wanted my Toolbar to be able to expand with a paralex image once it reaches the top, but I also wanted the toolbar to disappear if scrolling down, and show itself again (without the paralex image) once I scroll up. the paralex image effect should only displayed if I reaches the top.
So basically the solution is, change the component CollapsingToolbarLayout
with the following attribute:
app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
and also change toolbar component with the following attribute
android:minHeight="?attr/actionBarSize"
regarding my paralex effect image (which is my toolbar_search_container
) I shouldn't add any layout_scrollFlags
to it.
So why is it working?
To understand it, you need to know what is enterAlwaysCollapsed
,
The enterAlwaysCollapsed
effects views that added the minHeight
attribute. this means, every child of CollapsingToolbarLayout
which have minHeight
will be effected by this attribute.
So my toolbar will be effected.
enterAlwaysCollapsed
attribute definition in simple words:
Assuming enterAlways is declared and you have specified a minHeight, you can also specify enterAlwaysCollapsed
. When this setting is used, your view will only appear at this minimum height. Only when scrolling reaches to the top will the view expand to its full height..."
Well, isn't this exactly what we want? (do not answer this retorical question ;) )
One more thing to add, the parallax component (toolbar_search_container
) is depends on the toolbar to expand, and because the toolbar will expand only when it reaches the top, then this is all just working great!
The new code is :
<android.support.design.widget.CoordinatorLayout
android:id="@+id/benefit_coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="@+id/app_bar_material_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/main.collapsing"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
>
<include
android:id="@+id/toolbar_search_container"
layout="@layout/search_box"
android:layout_height="192dp"
android:layout_width="match_parent"
app:layout_collapseMode="parallax"
/>
<include
android:id="@+id/toolbar_benefit"
layout="@layout/toolbar_main"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:minHeight="?attr/actionBarSize"
app:contentScrim="?attr/colorPrimary"
app:layout_collapseMode="pin"
android:fitsSystemWindows="true"
/>
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:id="@+id/benefit_tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/primaryColor"
app:tabIndicatorColor="@color/accentColor"
app:tabSelectedTextColor="@android:color/white"
app:tabTextColor="@android:color/black"
app:tabIndicatorHeight="4dp" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/benefit_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
<include
layout="@layout/floating_btn_benefits"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right"
android:layout_margin="16dp"
/>
</android.support.design.widget.CoordinatorLayout>
Best Solution
Updated (8/24/2015):
Please see my latest answer here using the
Design Support Library
:Hiding the ActionBar on RecyclerView/ListView onScroll
Updated (6/2/2015):
ListView + ToolBar - without Libraries:
Please see https://stackoverflow.com/a/26547550/950427 and https://github.com/google/iosched/blob/master/android/src/main/java/com/google/samples/apps/iosched/ui/BaseActivity.java.
From: http://pastebin.com/yeMX3VYP
ListView + ActionBar - without Libraries:
https://stackoverflow.com/a/17767691/950427
I recently wanted the same functionality and this works perfectly for me:
As the user scrolls upward, the ActionBar will be hidden in order to give the user the entire screen to work work with.
As the user scrolls downward and lets go, the ActionBar will return.