I have created the MainActivity for my Android studio project, but after creating it I am adding a Login screen that I want to be the starting activity when the app launches. I changed the AndroidManifest.xml file to include the correct intent-filters for the login activity.
The app launches correctly with the login activity, but the problem is that now when I proceed to the MainActivity the buttons and fragments inside of it don't work anymore. The buttons don't respond to being clicked, and the fragments just don't appear at all.
Here is my code for the Android manifest file. All I changed was I switched .Login and .MainActivity
When I switch them back everything in MainActivity works correctly.
Is there something else I need to change for all the functionality of MainActivity to work correctly, even when it's not the starting activity when the app launches?
<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/AppTheme">
<activity android:name=".Login">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".LocationService" />
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<activity android:name=".MainActivity"></activity>
</application>
A screenshot of my activity preview
I'm new to android studio and have been following various tutorials online. Cant find the answer to this problem. if i change the app_name in the strings.xml, the name on the picture posted above also changes and if i generate the apk it also acts as the app name. I tried to add another string on the strings.xml but nothing changes. Is there a way to edit the title above without changing the final app name
strings.xml code
<resources>
<string name="app_name">Hello world</string>
That's because the same String is being used in both the layout where your image shows, and in your Manifest file.
You might recognize this code inside your AndroidManifest.xml file:
<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/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Note the part that says android:label="#string/app_name". That's the String that your app will show as the app name.
So if you want to use two different names, one for the app name and one for inside your layout, simply create two different Strings and assign one to the AndroidManifest.xml and the other to whichever layout you're image shows.
Use the app_name in the intent-filter of the launcher activity. and use a different string for android:label of your activity. Manifest would look like something this -
<activity
android:name=".MainActivity"
android:label="#string/title_main_activity"
android:icon="#drawable/icon">
<intent-filter android:label="#string/app_name">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
And create <string name="title_main_activity">Hello Main Activity</string>
I am trying to have a different app name for an Activity "My Profile Photo" but it does not seem to show up even when I have given android:label="My Profile Pic" to that particular activity
The Manifest File:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.aditya.myprofile">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity"
android:label="My Profile">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".ProfilePhoto"
android:label="Profile Pic" ></activity>
</application>
</manifest>
The XML Design:
The Android App name space is empty
Where am I going wrong?
Try this add title through java code add this code in your activity like this
getSupportActionBar().setTitle("My Profile");
I think you need to set a theme to your activity in your manifest.
<activity android:name=".ProfilePhoto"
android:theme="#style/AppTheme"
android:label="#string/profilePicture></activity>
Another solution : in your activity in onCreate you need to call :
getSupportActionBar().setTitle("Your Activity Title");
Im new to android, and when i read "Create New Activity" i was under the impression it creates a new "Window/Layout/Screen".
When i start making my own application i see
Main.java
is one application and
SecondActivity.java
is another app in my Emulators menu?
Why is that and how can i go about making one app with multiple windows as apposed to multiple applications essentially?
Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ryan.bidorbuyapp" >
<application
android:allowBackup="true"
android:icon="#mipmap/bidorbuy_logo"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".FullscreenActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="#string/app_name"
android:theme="#style/FullscreenTheme" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SearchResults"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="#string/title_activity_search_results"
android:parentActivityName=".FullscreenActivity"
android:theme="#style/FullscreenTheme" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.ryan.bidorbuyapp.FullscreenActivity" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
thanks
Look at your AndroidManifest.xml there is the problem. Your activities have Launcher between it's tags. Only one activity must have LAUNCHER tag
Only one activity must have
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
You should understand what is an Activity before starting to developing an android application. You can think an activity as a page in web. There can be one or more and every activity includes their own contents.
When you create a new activity in your project, you should navigate by doing some operations in another activity. Intent helps you at this point to navigate one activity to the another.
Your problem is that, you should check your AndroidManifest.xml file. Please check the declaration of intent here. I think you will solve it after making a search about Intent.
How can I change application label to change app name shown from java code in android?
I'm refering to:
<application android:icon="#drawable/icon" android:label="#string/app_name">
in the Android Manifest
Is there any way to update values in strings.xml file?
in the activity, i tried
this.setTitle("your text");
and it worked. I hope it's a common solution
It's not possible by the moment. It is a fixed string in the AndroidManifest.xml file which cannot be changed at runtime.
Using <activity-alias> you can change App icon and name to few predefined by you.
Create such config in Mannifest.xml
<activity android:name="package.name.MainActivity"
android:screenOrientation="portrait"
android:label="#string/app_name"
android:theme="#style/CustomTheme"
android:launchMode="singleTask">
<intent-filter>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity-alias android:label="#string/app_name_default"
android:icon="#drawable/icon_default"
android:name=".MainActivity-Default"
android:enabled="true"
android:targetActivity=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity-alias>
<activity-alias android:label="#string/app_name_flavor_one"
android:icon="#drawable/icon_flavor_one"
android:name=".MainActivity-Flavor-One"
android:enabled="false"
android:targetActivity=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity-alias>
Now you can switch between those two aliases, therefore we will change app icon or/and name.
To switch from Default to Flavor-One use this code.
getPackageManager().setComponentEnabledSetting(
new ComponentName("package.name", "package.name.MainActivity-Flavor-One"),
PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);
getPackageManager().setComponentEnabledSetting(
new ComponentName("package.name", "package.name.MainActivity-Default"),
PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);
Keep in mind that you have to track that only one alias will be enabled at a time
In Launcher Activity,Before setContentView() write this,
setTitle("Your Title");
I don't know how it's possible, But it's surely works.
Yes, Its possible, In this question everyone mentioned like
this.setTitle("your text");
this will change only your activity name not app logo here I show you how to change the app logo and appname dynamicly
First add your dynamic app icons in the mipmap folder , after that add the below code in your AndroidManifest.xml file
Add <activity-alias> for your app icon
<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/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<!-- Disable the original activity app icon in launcher -->
<!-- <category android:name="android.intent.category.LAUNCHER" /> -->
</intent-filter>
</activity>
<activity-alias android:label="Anand"
android:icon="#mipmap/ic_launcher"
android:roundIcon="#mipmap/ic_launcher_round"
android:name=".MainActivityAlias1"
android:enabled="true"
android:targetActivity=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity-alias>
<activity-alias android:label="Anand 1"
android:icon="#mipmap/ic_launcher2"
android:roundIcon="#mipmap/ic_launcher2_round"
android:name=".MainActivityAlias2"
android:enabled="false"
android:targetActivity=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity-alias>
</application>
After doing these methods on your activity, just do below things on button click
import android.content.ComponentName
import android.content.pm.PackageManager
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_main.*
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
button1.setOnClickListener{
packageManager?.setComponentEnabledSetting(
ComponentName(applicationContext.packageName, applicationContext.packageName + ".MainActivityAlias1"),
PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP
)
packageManager?.setComponentEnabledSetting(
ComponentName(applicationContext.packageName, applicationContext.packageName + ".MainActivityAlias2"),
PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP
)
}
button2.setOnClickListener{
packageManager?.setComponentEnabledSetting(
ComponentName(applicationContext.packageName, applicationContext.packageName + ".MainActivityAlias1"),
PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP
)
packageManager?.setComponentEnabledSetting(
ComponentName(applicationContext.packageName, applicationContext.packageName + ".MainActivityAlias2"),
PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP
)
}
}
}
for more details refer this github project
Application's android:label is a fixed resource referrer.
But the string under this referrer could have multiple values, depending on configuration qualifier names (values-en, -large, -land, etc.), according to
Providing Alternative Resources.
To anyone interested: Android How to change the application title
But it's not clear if it changes the "application label" (that is, the name of the icon in the application list) or only the window title.
If you are extending the firmware, you can actually accomplish this by changing IconCache.java file and make it show a string with some internal value of the phone.
For example if you want the SIM Toolkit to show the name of the carrier, you can do that this way.
But for regular apps, as it's been said, it's currently not posible.
As Mister Smith said, it is not possible,
but you could use multiple ActivityAlias, which can be enabled/disabled dynamically and point to the same targetActivity. Therefore create your chooser for the app name - let the user select one and enable the ActivityAlias via the packageManager:
ComponentName componentName = new ComponentName(context, context.getPackageName() + "." + aliasName);
context.getPackageManager().setComponentEnabledSetting(componentName,
PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
PackageManager.DONT_KILL_APP);
To hide the old alias, use the same code with the flag : COMPONENT_ENABLED_STATE_DISABLED
You can also add the possibility to directly add a shortcut to the home launcher, after you enabled the alias. There are plenty ways described here on sow.