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Can't Install an Android Application ERROR "Installation did not succeed"

I was Working to my project suddly while I was testing this Error Apears:
Installation did not succeed.
The application could not be installed: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED
This Is the Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.ymmyserver">
<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.Ymmy">
<activity android:name=".FoodList"></activity>
<activity
android:name=".Home"
android:label="#string/title_activity_home"
android:theme="#style/Theme.Ymmy.NoActionBar"></activity>
<activity android:name=".SignIn" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
I Didn't change any thing with the manifest file

Add icon in Theme.AppCompat.Light

I'm using the Theme.AppCompat.Light in my android application and I would like to add an icon on the top left of the action bar. How can I do it? This is my Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.progettoium">
<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.AppCompat.Light">
<activity android:name=".ListaPrenotazioni"></activity>
<activity android:name=".ListaCorsi" />
<activity android:name=".ListaLiberi" />
<activity
android:name=".LoginSignup"
android:label="#string/title_activity_login_signup"
android:theme="#style/AppTheme.NoActionBar" />
<activity
android:name=".Signup"
android:theme="#style/AppTheme.NoActionBar" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

you can add it programmatically with
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_action_refresh);
in your main activity

How do i properly do multiple splash screens android

I want to make two splash screens for my android app. Only the second splash screen is visible whereas the first one isn't. Is what am trying to do possible? Here is my manifest.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.app">
<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">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</activity>
<activity
android:name=".SplashActivity1"/>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<activity
android:name=".SplashActivity2">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
and here is my code for first splash screen
.........
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
Intent i = new Intent(SplashActivity1.this,
SplashActivity2.class);
startActivity(i);
// close this activity
finish();
}
}, SPLASH_TIME_OUT);
}
and second Splash Screen
..................
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
Intent i = new Intent(SplashActivity2.this, MainActivity.class);
startActivity(i);
// close this activity
finish();
}
}, SPLASH_TIME_OUT);
}

Remove the intent filter from splashscreen 2 activity like in below code. other things are ok.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.app">
<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"/>
<activity
android:name=".SplashActivity1">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SplashActivity2">
</activity>
</application>
</manifest>

android:name="android.intent.category.LAUNCHER" should be give to only one Activity, which you want to call when app launches.
remove that from other Activities.
<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=".SplashActivity1">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SplashActivity2"/>
<activity android:name=".MainActivity"/>
</application>
I highly recommend you first learn How to deal with Intent_filter.

Try with this: Make Main activity as default one and splash screen as Main launcher
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.app">
<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">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</activity>
<activity
android:name=".SplashActivity1"/>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<activity
android:name=".SplashActivity2">
</activity>
</application>

Play Store says app is incompatible with phone tested on

The Play Store says that my app is incompatible with all the devices that I have, but that also includes the phone that I tested it on. Below is my Manifest file. I tested it on my Nexus 5X running Nougat, but the Play Store says that the app is incompatible with that phone of mine. Thanks a lot !
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.health4everyone.thejdeep.healthpal">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="#####" />
<activity android:name="com.heath4everyone.thejdeep.healthpal.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.heath4everyone.thejdeep.healthpal.Home"></activity>
<activity android:name="com.heath4everyone.thejdeep.healthpal.Hospitals"></activity>
<activity
android:name="com.heath4everyone.thejdeep.healthpal.Restaurants"
android:label="Map">
</activity>
<activity android:name="com.heath4everyone.thejdeep.healthpal.ActivityTracker"></activity>
<activity android:name=".Settings" android:label="#string/app_name">
<intent-filter>
<action android:name="com.health4everyone.thejdeep.healthpal.Settings" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="com.heath4everyone.thejdeep.healthpal.SearchFoodByRestaurant"
android:label="Search Restaurant">
</activity>
</application>
</manifest>
Edit : Removed the API key :)

ReadExternalStorage permission is rejected, even after declaring it in the manifest

I know this is a really basic question but I'm stuck. I've declared that my app uses the read external storage permission, but my app is crashing when I try to perform an action that requires the permission. Here is the manifest:
<?xml version="1.0" encoding="utf-8"?>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<uses-feature android:name="android.hardware.camera"
android:required="false" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<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>

Move the declarations to be children of the manifest, not the application:
<?xml version="1.0" encoding="utf-8"?>
<manifest ... >
<uses-feature android:name="android.hardware.camera"
android:required="false" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<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>