Develop Reference

Using BottomNavigationView with a no Theme.AppCompat

i need to use the theme
android:theme="#android:style/Theme.Holo.NoActionBar.Fullscreen"
in an activity where there is a
android.support.design.widget.BottomNavigationView
but everytime i run the app it crashes because BottomNavigationView need Theme.AppCompat. How can i fix this?
My Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="tfdev.avventuratestuale">
<application
android:name=".Main.MyApplication"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#android:style/Theme.Holo.NoActionBar.Fullscreen">
<activity android:name=".Main.Main.menu_principale"
android:theme="#android:style/Theme.Holo.NoActionBar.Fullscreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Main.Main.scene_manager"
android:theme="#style/Theme.AppCompat"
></activity>
</application>
</manifest>
BottomNavigationView activity:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#layout/main_background">
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
app:itemBackground="#color/colorPrimary"
app:itemIconTint="#FFFFFF"
app:itemTextColor="#FFFFFF"
app:menu="#menu/bottom_navigation_main" />
</RelativeLayout>
BottomNavigation Activity:
public class scene_manager extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
setContentView(R.layout.activity_scene_manager);
}

Well you can certainly use the BottomNavigationView with the Holo theme even though I don't know why you would want to do something like this.
First of all: Not only the BottomNavigationView but also the AppCompatActivity from which your Activity extends require an AppCompat theme. Following what you need to change in order to make this work:
1 - Extend from Activity not AppCompatActivity
public class scene_manager extends Activity {
// ....
}
Note: Class names in Java shouldn't use snake_case but upper camelCase
2 - Apply an AppCompat Theme to the BottomNavigationView directly
<RelativeLayout ... >
<android.support.design.widget.BottomNavigationView
...
android:theme="#style/Theme.AppCompat"
/>
</RelativeLayout>
This way it will work but you'll use certain features like the Toolbar since you're not extending AppCompatActivity.

You can't. BottomNavigationView requires that you use an AppCompat theme.
One possibility is to use a third-party library that duplicates the functionality you need (instead of using the Google view).

I've fixed adding
requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
in all the activity

Splash Screen not properly displayed

Code For splash.xml :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:background="#drawable/notice2"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".SplashScreen">
</RelativeLayout>
Code For AndroidManifest.xml :
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name="com.kksworld.noticeboard.SplashScreen"
android:label="#string/title_activity_splash_screen"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.kksworld.noticeboard.LoginActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar">
</activity>
<activity
android:name="com.kksworld.noticeboard.Registration"
android:label="#string/title_activity_registration"
android:theme="#style/AppTheme.NoActionBar" />
</application>
`I am trying to add splash screen in my project. But after running the app the screen stops for the time i have set the timer but exact splash screen is not coming. After that everything is coming. Please Help. Thanks.
Code for Splash Activity :
public class SplashScreen extends Activity {
// Splash screen timer
private static int SPLASH_TIME_OUT = 3000;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content_splash_screen);
new Handler().postDelayed(new Runnable() {
/*
* Showing splash screen with a timer. This will be useful when you
* want to show case your app logo / company
*/
#Override
public void run() {
// This method will be executed once the timer is over
// Start your app main activity
Intent i = new Intent(SplashScreen.this, LoginActivity.class);
startActivity(i);
// close this activity
finish();
}
}, SPLASH_TIME_OUT);
}
}

Try using the bellow code
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="info.androidhive.androidsplashscreentimer"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<!-- Splash screen -->
<activity
android:name="info.androidhive.androidsplashscreentimer.SplashScreen"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:theme="#android:style/Theme.Black.NoTitleBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Main activity -->
<activity
android:name="info.androidhive.androidsplashscreentimer.MainActivity"
android:label="#string/app_name" >
</activity>
</application>
</manifest>
activity_splash.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/gradient_background" >
<ImageView
android:id="#+id/imgLogo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:src="#drawable/wwe_logo" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:textSize="12dp"
android:textColor="#454545"
android:gravity="center_horizontal"
android:layout_alignParentBottom="true"
android:text="www.androidhive.info" />
</RelativeLayout>
SplashScreen.java
package info.androidhive.androidsplashscreentimer;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
public class SplashScreen extends Activity {
// Splash screen timer
private static int SPLASH_TIME_OUT = 3000;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
new Handler().postDelayed(new Runnable() {
/*
* Showing splash screen with a timer. This will be useful when you
* want to show case your app logo / company
*/
#Override
public void run() {
// This method will be executed once the timer is over
// Start your app main activity
Intent i = new Intent(SplashScreen.this, MainActivity.class);
startActivity(i);
// close this activity
finish();
}
}, SPLASH_TIME_OUT);
}
}

Splash screens that delay the app should not be used as they interrupt the users in whatever they want to do with your app.
But: There is a way better approach and it is even easier to implement!
Every app needs some time to start and while its starting, most apps only display a white background as this is the default. You can change that however by adding a new style to your themes.xml that sets the windowBackground to any drawable
<style name="YourApp.AppTheme.Splashscreen" parent="YourApplicationsTheme">
<item name="android:windowBackground">#drawable/splashscreen</item>
</style>
You can define the drawable like that if you want a logo on a coloured background:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
android:opacity="opaque">
<item android:drawable="#color/some_color"/>
<item>
<bitmap
android:gravity="center"
android:src="#drawable/some_logo"/>
</item>
</layer-list>
Just add this theme to your <application> in the AndroidManifest.xml and your splash screen is already up and working.
Finally, set your theme back to your normal theme after the startup using
getApplication().setTheme(R.style.YourApplicationsTheme);
to prevent the splash from appearing whenever you switch activities.
All done! A beautiful splash screen without delaying the user.
Android design guidelines are also suggesting that way and you can also see this for reference.

Check your layout files. Make sure you are using the correct layout files. In the java code you have used content_splash_screen.xml, but, you have posted the code for splash.xml.
There are no errors in the code, your code should run fine.

Android setContentView uses wrong layout file

My bare-bones test app sets the orientation to landscape on start up. It has a layout and layout-port directory. There is a simple layout file in each directory. They contain a textview with text set to either "Landscape" or "Portrait".
In my test I start the app on a tablet tipped into portrait. With this code, I would expect the layout from /layout/my_layout.xml to be used, but /layout-port/my_layout.xml is used instead. I've also tried making a /layout-land directory but still no luck.
From my main activity:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Start app with tablet in portrait orientation
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
int o = this.getRequestedOrientation();
// o is 0, indicating landscape. Display shifted to landscape
setContentView(R.layout.my_layout);
// layout-port/my_layout.xml is loaded. INCORRECT I think
}
/layout/my_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff000000">
<TextView
android:id="#+id/tvLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Landscape"
android:textSize="50sp"
android:textColor="#ffffffff"/>
</LinearLayout>
/layout-port/my_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff000000">
<TextView
android:id="#+id/tvLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Portrait"
android:textSize="50sp"
android:textColor="#ffffffff"/>
</LinearLayout>
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mytest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="16" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.mytest.ActivityMain"
android:configChanges="keyboardHidden|orientation|screenSize"
android:label="#string/app_name"
android:windowSoftInputMode="stateHidden|adjustPan" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

Change /res/layout/my_layout.xml to /res/layout-land/my_layout.xml
Note: I added the suffix -land

Your have to remove option "orientation" in manifest:
android:configChanges="screenSize|orientation|keyboardHidden"
Because this option says you handle it by yourself...
Good explanation here:

splashscreen imageview not displaying images

Hi guys i have this splash screen with the layout main.xml which contains an imageview,
here is the main.xml file
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/LinearLayout2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/slide11" />
</LinearLayout>
and here is my splashscreen.class file
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
try {
new Handler().postDelayed(new Runnable() {
public void run()
Intent intent = new Intent(getApplicationContext(),content_activity.class);
startActivity(intent);
Main.this.finish(); } }, 5000);
} catch(Exception e){}
}
#Override
public void onBackPressed() {
super.onBackPressed();
} }
when i try to run this in my emulator all works fine, but when i try to run it in a device through debugging mode i don't get the image specified in the imageView, but i get a white screen for the specified amount of time.any help would be much appreciated.
//edit : i double checked the res/drawable folder and i tried primarily using png and also gave a go using .gif none worked in the device. (device micromax a110)

use this instead of your layout.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/LinearLayout2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#drawable/slide11" >

looks like it was because of the size of the image, when reduced worked !!

Use image as layout background :-
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/LinearLayout2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#drawable/slide11"
>
</LinearLayout>

This can be happening due to issue in the manifest file. Here is an example of my manifest file which has 3 activities and 1 splash screen. Hoping that this helps out.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.foodorder">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.FoodOrder">
<activity android:name=".MainActivity"></activity>
<activity android:name=".Final_activity" />
<activity android:name=".Second_activity" />
<activity
android:name=".SplashActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

The emulator isn't showing the XML contents

I have been reading Google's android tutorial and I got a problem... In the tutorial they explain the XML elements (EditText and Button) and in the end they say how to tun the program to see the button + the text field.
The problem is, that the emulator doesn't show them.. just a black screen.
I even tried adding this line to the onCreate function -
System.out.println("Hello World!");
but still the emulator is showing only black screen..
Here's the .java main file - http://pastebin.com/G5J9YjNe
And the XML files (I mentioned what code is what file) - http://pastebin.com/VnRwAfMW
What should I do?
Thanks a lot for everyone who will help!

System.out.println("Hello World!");
does not print any thing on screen. it can seen on Consol. i tried below code and working fine for me.
// Main Activity
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.kuchbhi);
System.out.println("Hello World!");
}
Layout /.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<EditText android:id="#+id/text_message"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="enter text" />
<Button android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="Send" />
</LinearLayout>
Manifest file ..
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.test"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name="MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
try this code and let me know what u see.
I tried your source code and it is working fine for me. see screen