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White screen at app startup - Splash Screen [duplicate]

This question already has answers here:
Android - Prevent white screen at startup
(18 answers)
Closed 4 years ago.
I created a splash screen for my application using an empty activity that stays visible for 3 seconds with a background image.
Usually, the application starts with a white screen before the background image becomes visible, however, some applications are already started with the "real" splash screen image.
How to implement this?

you can use splash screen in this way.
Add style for splash screen activity in styles.xml
<style name="SplashTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="android:windowBackground">#drawable/yourImageName</item>
</style>
Add that style as theme to your SplashScreenActivity in manifest file
<activity android:name=".SplashScreenActivity"
android:theme="#style/SplashTheme"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Remove setContentView() in SplashScreenActivity's onCreate() Method and use it as a java file which extends AppCompactActivity

The problem is because system process draws initial blank screen when launching the app, from documentation:
A common way to implement a themed launch screen is to use the windowDisablePreview theme attribute to turn off the initial blank
screen that the system process draws when launching the app. However,
this approach can result in a longer startup time than apps that don’t
suppress the preview window. Also, it forces the user to wait with no
feedback while the activity launches, making them wonder if the app is
functioning properly.
You can disable it with windowDisablePreview attribute, something like this:
<application
...
android:windowDisablePreview="true">
...
</application>

Splash Activity usually starts with the background.
Try this code, it might help you.
Code for your splash activity page.
public class SplashScreen extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash_screen);
Thread myThread = new Thread(){
#Override
public void run() {
try {
sleep(3000);
Intent intent = new Intent(getApplicationContext(),MainActivity.class);
startActivity(intent);
finish();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
myThread.start();
}}
In layout file, you need to include just Image which you want to see on the splash page.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_splash_screen"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/capture"
/>
</RelativeLayout>
And make sure you add the Splashscreen page before Main activity in Manifest.
<activity android:name=".SplashScreen">

Unfortunately, <application name> has stopped. (Android)

I am learning android, I am trying to develop game, I have two classes "Starter" and "Board". Starter class contains menu(http://postimg.org/image/dnyvoey2l/). Its Exit and Help buttons are working properly, but when I press "Two Player" option instead of showing board it shows an error (Unfortunately, (Application Name) has stopped). I am sharing code snippet , please suggest solution.
twop.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent tow= new Intent(Starter.this, Selector.class);
startActivity(tow);
}
});

You can't show View using startActivity() method
Intent tow= new Intent(Starter.this, Board.class);
startActivity(tow);
Board should be extended from Activity not from View class. Create an BoardActivity.java and extend it from Activity.
You should then add Board View either from XML or programmatically using setContentView(); in your onCreate() method.
Edit
Don't forget to add new Activity in your Manifest.xml file. Like this
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="your.application.package.name">
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".Starter" android:label="#string/app_name"></activity>
<activity android:name=".Selector"></activity>
</application>
</manifest>

Below is my idea.
The code of OnClick means starting a new activity.
Intent tow= new Intent(Starter.this, Board.class);
startActivity(tow);
However, the Board is a View, not an activity.
So, you should make Board inherit from Activity (or create other activity to hold the Board).
When creating any activity, make sure to register in manifest.

Why doesn't my Send button work?

I've created my first app, step by step, as described on
http://developer.android.com/training/basics/firstapp/starting-activity.html
According to this page, after clicking the button, there should appear a default "Hello world" layout, respectively the message typed in the text field.
Unfortunately, none of them appears at all. Absolutely nothing happens. Why?
Thanks in advance...

I suggest using setOnclicklistener. It seems you are new in coding. Google provide a good beginner guide. But still confusing a lot. take a look at this code.
first You need to locate your curret Button.
Button b1=(Button) findViewById(R.id.send);
assuming that your button hase a xml name"Send"
Now starting activity by clicking button
b1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0)
{
Intent in=new Intent(MainActivity.this,secondActivity.class);
startActivity(in);
}
});
}
Assuming that "secondactivity" is your target activity which you want to open by clicking button. Another Putextra and getextra method will be same as described in tutorial. Note this is an alternative method which i have described but you can still use that one.
I suggest that if you are a beginner you should start with youtube or lynda.com video tutorial. Rest is upon you

Have you edited the AndroidManifest.xml file.You should make sure that the following code is in your manifest file:
<activity
android:name="your package name.your main activity name"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity>

How to create custom PopupWindow from intent call?

I wanna create a custom PopupWindow similar to this :
http://android-er.blogspot.kr/2012/03/example-of-using-popupwindow.html
In this example, PopupWindow is created by a button click event from an activity, but i want to create PopupWindow via intent from another application.
Is it possible? Any comments will be very appreciated!

The idea is to declare a standard Activity to make it appear like a Popup window of sorts.
Use this code (standard boiler plate Intent code to trigger the Activity)
SOME_WIDGET.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent myIntent = new Intent(getApplicationContext(), THE_POPUP_ACTIVITY.class);
startActivity(myIntent);
}
});
If, for example, you name the popup Activity as Popup, then replace the THE_POPUP_ACTIVITY.class with Popup.class
Now, for this Activity, in the Manifest, declare a theme. For example:
And this is the corresponding style declaration:
<style name="DialogNoTitleBar" parent="android:style/Theme.Dialog">
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowBackground">#android:color/transparent</item>
<item name="android:windowContentOverlay">#null</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowIsFloating">true</item>
<item name="android:backgroundDimEnabled">false</item>
</style>
Also, in the onCreate() of the Popup Activity, you might want to add this statement right after the setContentView(R.layout.THE_LAYOUT_XML); I say might because how you want it to appear may vary from how I program my popup Activity.
getWindow().setLayout(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);

Your requirement isn't really clear. Intents are usually used when you want to switch to another activity or maybe send the intent to a service of some sorts. If you want to open a dialog for an action, you don't really need intents.

Create an activity with your custom design, while registering the activity in the manifest file just add this android:theme="#android:style/Theme.Dialog"
and call the activity with your intent. Hope you got it. :)

Issues with Translucent Theme

I have an app that has two activities.
The first one is presented with a single button that opens the second one.
Here is the Manifiest definition for the first one:
<activity
android:name="com.example.buttonexample.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Second activity:
<activity
android:name="com.example.buttonexample.MainActivity2"
android:label="#string/title_activity_main_activity2" android:theme="#android:style/Theme.Translucent">
</activity>
Here is how I launch the second activity (via OnClickListener for a button on the first activity):
public void startSecondActivityClick(View v) {
Intent startActivity2 = new Intent(this, MainActivity2.class);
startActivity(startActivity2);
}
This works fine, however when I background the app by hitting home and the foreground the app. I'm noticing that the first activity is continually creating/destroying itself. I verified this by putting some code in the onDestory method to increment a static int:
private static int count = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
count++;
}
protected void onDestroy() {
super.onDestroy();
Log.i("MainActivity", String.format("Destroyed, %d", count));
}
I've also noticed that removing the translucent theme seems to fix this. My question is is there a way to translucent or something similar but also have it not restart? Also, I'm curious why this happens at all. I'm testing this on 4.0.1 ICS on a galaxy SIII.

Ok after some digging I was able to figure out why this is happening. Someone had turned on one of the developer options, "do not keep activities.". After turning this off this stopped happening. I suspect this wouldn't happen in production too often as most people probably don't have that setting on. You can find this under settings -> "developer options" on most phones.