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Error when sharing a CSV file saved in internal storage

I'm creating a contact tracing application using Java, the results of tracing are saved as detections.csv inside /storage/emulated/0/Android/media/com.idcta.proj.app/Sensor/ folder.
I'm trying to share this file on a button click, and my Manifest looks like this
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.idcta.proj.app">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"
tools:ignore="ScopedStorage" />
/>
<application
android:name="com.idcta.proj.app.AppDelegate"
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"
android:hardwareAccelerated="true"
android:requestLegacyExternalStorage="true">
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths" />
</provider>
.....</appliction>
provider_paths.xml looks like:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
and inside my Contactlogs.java file inside the onCreate method
//request permissions for storage
requestPermissions();
//share button event
btn_share =(ImageButton)findViewById(R.id.btn_sharelogs);
btn_share.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath(),"detection.csv");
Uri path = FileProvider.getUriForFile(Contactlogs.this,BuildConfig.APPLICATION_ID+".provider",file);
Intent fileIntent = new Intent(Intent.ACTION_SEND);
fileIntent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION |
Intent.FLAG_GRANT_READ_URI_PERMISSION);
fileIntent.setType("text/*");
fileIntent.putExtra(Intent.EXTRA_STREAM, path);
Toast.makeText(Contactlogs.this," "+path,Toast.LENGTH_LONG).show();
startActivity(Intent.createChooser(fileIntent, "Send"));
}
});
But I keep getting the error:
E/ContentProviderNative: onTransact error from {P:29044;U:1000}
E/DatabaseUtils: Writing exception to parcel
java.lang.SecurityException: Permission Denial: reading androidx.core.content.FileProvider uri content://com.idcta.proj.app.provider/external_files/detection.csv from pid=29044, uid=1000 requires the provider be exported, or grantUriPermission()
at android.content.ContentProvider.enforceReadPermissionInner(ContentProvider.java:873)
at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:714)
at android.content.ContentProvider$Transport.query(ContentProvider.java:245)
at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:120)
at android.os.Binder.execTransactInternal(Binder.java:1165)
at android.os.Binder.execTransact(Binder.java:1134)
Any idea what I'm doing wrong here?
My Build.Gradle settings:
compileSdkVersion 30
buildToolsVersion "30.0.1"
defaultConfig {
applicationId 'com.idcta.proj.app'
minSdkVersion 21
targetSdkVersion 30
versionCode 1
versionName "1.2.0"

detections.csv inside /storage/emulated/0/Android/media/com.idcta.proj.app/Sensor/ folder.
That you got using getExternalMediaDirs()[0].
/storage/emulated/0/Android/media/com.idcta.proj.app/Sensor/detections.csv
So what did you code to have that path while saving?
Now when you want to serve the file you could use:
File file = new File(getExternalMediaDirs()[0], "Sensor/detections.csv");
Now you are hard coding your package name in the path.
Hardcoding should be avoided.

Strange behavior related to FusedLocationApi.requestLocationUpdates()

I'm writing a Android app and there's a strange behavior related to FusedLocationApi.requestLocationUpdates() that I've searched on SO and none of the other related questions solved my problem.
Apparently the requestLocationUpdates do not trigger the onLocationChanged() method all the times; I'm saying this because I'm cleaning my app's data on emulator for each run and sometimes the onLocationChanged() is triggered, sometimes not (most of under some conditions like run the app for the second time w/o cleaning the app's data or after making a user data's wipe i.e)
Below you can find my code (links from pastebin, I don't want to create any visual overload here)
Main Activity: http://pastebin.com/XiRrcR11
MapHandler: http://pastebin.com/HELnhaxy
Another problem is, oddly enough, if I use a anonymous inner class in the MapHandler in the method displayLocation(), the app works, but if I use a external class who extends LocationListener the app do not behave correctly
I know the expected question levels in SO are high but I'm starting my studies about Android development and this issue is taking my sleep away
Btw here is my AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.trackit.app.track_it_v002">
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="#string/google_maps_key" />
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<activity
android:name=".MapsActivity"
android:label="#string/title_activity_maps">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Can you guys give me a hand here?
EDIT: after some debugging I've seen the requestLocationUpdates is not returning a non null object and not triggering onLocationChanged(), anyone have a idea why? =S

I encountered this issue. The mGoogleApiClient object, which needs to be connected at the time of requestLocationUpdates. This was resolved by requestingLocationUpdates from onConnected callback.
/*
* Called first time google client is connected
*/
#Override
public void onConnected(#Nullable Bundle bundle) {
Log.v(LOG_TAG,"DetectDrivingService - onConnected");
// Create
try {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
catch(SecurityException se){
}
}

Permission Denial With Broadcast Receiver

I am trying to create an app which enters a log message when I make an outgoing call.
However, when I run the code, I get a permission denial, despite the fact that I have entered in the permissions.
Denial Log:
"09-04 02:35:50.535 1294-1666/? W/BroadcastQueue﹕ Permission Denial: receiving Intent { act=android.intent.action.NEW_OUTGOING_CALL flg=0x10000010 (has extras) } to samples.varma.packagecom.testreceive2/.CallReceiver requires android.permission.PROCESS_OUTGOING_CALLS due to sender android (uid 1000)"
Manifest Code:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="samples.varma.packagecom.testreceive2" >
android:versionCode="1"
android:versionName="1.0">
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="23" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:enabled="true"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name=".CallReceiver">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE"/>
<action android:name="android.intent.action.NEW_OUTGOING_CALL"/>
</intent-filter>
</receiver>
</application>
</manifest>
And here is the code for my receiver:
package samples.varma.packagecom.testreceive2;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.TelephonyManager;
import android.util.Log;
public class CallReceiver extends BroadcastReceiver {
public CallReceiver() {
}
#Override
public void onReceive(Context context, Intent intent) {
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
if (state == null) {
String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
Log.i("TAG", "Outgoing Number: " + number);
} else if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
Log.i("TAG", "Incoming Number: " + number);
}
}
}
I am very new to this so there is a good chance that there are several errors or I am completely off base. Regardless I would greatly appreciate any guidance. Would anyone know why I am getting this denial?
Thanks
Edit:
It is also giving me these permission denials even though I have added the phone state permission.
The privileged phone-state permission is a system permission so I cannot add.
09-04 04:36:03.249 1294-1440/? W/BroadcastQueue﹕ Permission Denial: receiving Intent { act=android.intent.action.PHONE_STATE flg=0x10 (has extras) } to samples.varma.packagecom.testreceive2/.CallReceiver requires android.permission.READ_PRIVILEGED_PHONE_STATE due to sender android (uid 1000)
09-04 04:36:03.271 1294-1308/? W/BroadcastQueue﹕ Permission Denial: receiving Intent { act=android.intent.action.PHONE_STATE flg=0x10 (has extras) } to samples.varma.packagecom.testreceive2/.CallReceiver requires android.permission.READ_PHONE_STATE due to sender android (uid 1000)
1294-1308/? W/BroadcastQueue﹕ Permission Denial: receiving Intent { act=android.intent.action.PHONE_STATE flg=0x10 (has extras) } to samples.varma.packagecom.testreceive2/.CallReceiver requires android.permission.READ_PHONE_STATE due to sender android (uid 1000)

I have launched the same application on Android emulator and nothing helped, even
android:enabled="true"
android:exported="true"
The solution was to go to Settings->Apps -> MyApplication -> Permissions -> Toggle Phone Permission on.
Android Phone Permission for Application

I got it to work by following this link closely Intercepting outgoing call - what am I missing? (thanks ajit)
I ended up taking off the PHONE_STATE permission, adding android:enabled="true" and android:exported="true" to my receiver in the manifest, relocating the NEW_OUTGOING_CALL permission to below application(not sure if this is necessary), taking away the intended sdk versions and basically copying the receiver from the link.
Updated manifest code from receiver tag to manifest tag is:
<receiver
android:name=".testreceive3"
android:enabled="true"
android:exported="true" >
<intent-filter>
<action android:name="android.intent.action.NEW_OUTGOING_CALL"/>-->
</intent-filter>
</receiver>
</application>
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />>-->
</manifest>

U need to apply the runtime permission int your code when your code running on Android 6.0 or above.

You should add the following thing in your Manifest receiver
<service android:name=".CallReceiver"
android:enabled="true"
android:exported="false" >
</service>

Use permission CALL_PHONE instead of OUTGOING
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

Best solution is when you run the code activate usb debugging, make sure you select disable permissions monitor settings in developer settings ! App wont be asked for permissions by the OS anymore. Happy helping :)
This will work without changing anything in manifest!

Pushes not received after the app is closed

Before labeling this as a duplicate:
I've read at least 15 similar threads and each and every one is either using the old Parse code (the now deprecated setDefaultPushCallback) or the problem was a result of calling Parse.initialize(...) in an activity and not in the Application class. But this is not applicable to my case. The official example (which I'm using) is evidently doing it right, so the code is already in the Application class.
I've downloaded the Push Starter example from Parse's official guides and tried it out on an emulator. I receive pushes only while the app is running. The moment's it's closed (removed from the "recent apps" list, not force killed), I no longer get pushes. Which makes the entire feature rather useless... I tried with and without GCM, the behavior is the same.
Any clues what could possible be wrong? All classes are the stock example ones, nothing overridden or added by me (except for the id/key and the ParsePush.subscribeInBackground call which I copied from the guide). Weirdly enough, the example code did not contain ParsePush.subscribeInBackground and the QuickStart does not mention it. It even gives a Test button that supposedly sends a push which I never receive, with or without subscribeInBackground. The only way I've been able to get a push so far was with subscribeInBackground and sending a push manually though the web console, and only so if the app is running. The web console also keeps telling there's 2 registered devices... which is untrue.
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.parse.starter"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="9" android:targetSdkVersion="21"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<!--
IMPORTANT: Change "com.parse.starter.permission.C2D_MESSAGE" in the lines below
to match your app's package name + ".permission.C2D_MESSAGE".
-->
<permission android:protectionLevel="signature"
android:name="com.parse.starter.permission.C2D_MESSAGE" />
<uses-permission android:name="com.parse.starter.permission.C2D_MESSAGE" />
<application
android:name=".ParseApplication"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:allowBackup="true">
<activity
android:name=".ParseStarterProjectActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name="com.parse.PushService" />
<receiver android:name="com.parse.ParseBroadcastReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
</intent-filter>
</receiver>
<receiver android:name="com.parse.ParsePushBroadcastReceiver"
android:exported="false">
<intent-filter>
<action android:name="com.parse.push.intent.RECEIVE" />
<action android:name="com.parse.push.intent.DELETE" />
<action android:name="com.parse.push.intent.OPEN" />
</intent-filter>
</receiver>
<receiver android:name="com.parse.GcmBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND">
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<!--
IMPORTANT: Change "com.parse.starter" to match your app's package name.
-->
<category android:name="com.parse.starter" />
</intent-filter>
</receiver>
</application>
</manifest>
ParseApplication:
package com.parse.starter;
...
public class ParseApplication extends Application {
#Override
public void onCreate() {
super.onCreate();
// Initialize Crash Reporting.
ParseCrashReporting.enable(this);
// Enable Local Datastore.
Parse.enableLocalDatastore(this);
ParseUser.enableAutomaticUser();
// Add your initialization code here
Parse.initialize(this, "***", "***");
ParseACL defaultACL = new ParseACL();
// Optionally enable public read access.
// defaultACL.setPublicReadAccess(true);
ParseACL.setDefaultACL(defaultACL, true);
ParsePush.subscribeInBackground("", new SaveCallback() {
#Override
public void done(ParseException e) {
if (e == null) {
Log.d("com.parse.push", "successfully subscribed to the broadcast channel.");
} else {
Log.e("com.parse.push", "failed to subscribe for push", e);
}
}
});
}
}

Just to clarify why you are seeing this behaviour, Parse has two different ways for delivering push notifications:
"Parse way": the Parse SDK has a component running in your app, which keeps a connection to the Parse backend servers. This will only work when your app is actually running, because killing it breaks the connection with the Parse backend.
GCM "Google" push notifications: This works via Google Play Services, an app which is always running in the background and that can start your app when needed. This will always work, unless you force stop the application.
In your case you are there is a package name conflict: com.parse.starter is the package name that was actually included in the example. This causes GCM not to work, because it already knows the package under a different signature. Changing your package name to something unique like com.parse.kaqqao should solve the trick.

There are a few reasons for this:
There are two BroadcastReceiver viz the "com.parse.ParsePushBroadcastReceiver" and "com.parse.GcmBroadcastReceiver". I believe that the first receiver is getting prioritized over the GCMBroadcastReceiver and thus the behavior is not affected by removing or keeping this receiver. It could also be due to action "com.parse.push.intent.RECEIVE", which might be handling the push messages RECEIVE action. If both the receiver perform the same task of parsing the Push message (starting the same service in background), then include the intent-filter inside one receiver and let it handle all kinds of push messages. Since GCMBroadcastReceiver holds the C2DM permission.
Try changing the order of the two broadcast receiver tags in the manifest. (Keep GCMBroadcastReceiver before the ParsePushBroadcastReceiver)
It could be due to android:exported="false", maybe it prevents the Receiver from listening to the push messages sent by server. Try changing to true.

Blank Screen Android 2.2 Google Maps v2

EDIT :
I transferred my 20+ projects that tries to use Google Maps for Android v2. After changing keys and stuff, now, it works. I don't know what made this work, but thank you all. I got one keystore, the key is right. I guess it magically fixed somehow. Well, thanks guys.
I'm doing searches for 2 days and I couldn't fix this problem. I did everything, yet, this application can not work.
I want my application to work on Android 2.2 and above. Like it says "if you create your app in level 8, it'll support 95% of market".
Here are my screenshots and source codes:
I'm pasting the source code which is the easiest to get. I took this from web.
Here's the output of the command
keytool -list -keystore <path>
***************** WARNING WARNING WARNING *****************
* The integrity of the information stored in your keystore *
* has NOT been verified! In order to verify its integrity, *
* you must provide your keystore password. *
***************** WARNING WARNING WARNING *****************
Keystore type: JKS Keystore provider: SUN
Your keystore contains 1 entry
androiddebugkey, 15.Mar.2013, PrivateKeyEntry,
Certificate fingerprint (SHA1): xxx
main.xml file:
<?xml version="1.0" encoding="utf-8"?>
<com.google.android.maps.MapView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:apiKey="AIzaSyDim-x5Gxxx"
/>
manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.androidhive.googlemaps"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<!-- Add Google Map Library -->
<uses-library android:name="com.google.android.maps" />
<activity
android:name=".AndroidGoogleMapsActivity"
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>
<!-- Allow to connect with internet -->
<uses-permission android:name="android.permission.INTERNET" />
</manifest>
java file (no need to paste it all, but I guess it's best to paste it all)
http://pastebin.com/yF95Rcbd
Here are my screenshots:
http://i.imgur.com/gExHpUG.png
http://i.imgur.com/AMOXKhr.png
http://i.imgur.com/Aqon97Y.png
I'm trying to compile this app to Android 4.2.2, but I tried and want to make it work in 2.2 and above.
Here's the Android tab of the properties window just to make sure:
http://i.imgur.com/ht0CQwT.png
Here's my log
03-20 07:01:20.145: W/System.err(956): at java.lang.Thread.run(Thread.java:856)
03-20 07:01:20.665: W/System.err(956): IOException processing: 26
03-20 07:01:20.665: W/System.err(956): java.io.IOException: Server returned: 3
03-20 07:01:20.665: W/System.err(956): at android_maps_conflict_avoidance.com.google.googlenav.map.BaseTileRequest.readResponseData(BaseTileRequest.java:115)
03-20 07:01:20.675: W/System.err(956): at android_maps_conflict_avoidance.com.google.googlenav.map.MapService$MapTileRequest.readResponseData(MapService.java:1473)
03-20 07:01:20.675: W/System.err(956): at android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher.processDataRequest(DataRequestDispatcher.java:1117)
03-20 07:01:20.675: W/System.err(956): at android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher.serviceRequests(DataRequestDispatcher.java:994)
03-20 07:01:20.675: W/System.err(956): at android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher$DispatcherServer.run(DataRequestDispatcher.java:1702)
These lines repeat all the time.
Thank you very much.
Your post appears to contain code that is not properly formatted as code" error made
me delete the blank lines. Sorry for the messed up codes.

http://i.imgur.com/ht0CQwT.png
See the snapshot. You did not add Google Play Services library that is require for displaying Google Android Map V2. Please download and add that library and then try again.
Please also see the target. Your target is 4.2.2 and your are accessing it on 2.2. Change the target to 2.2 and use support fragment.
Thanks,

I have solved this issue,
Open your Google APIs Console
Choose API Access
Edit allowed Android apps from your API Key
Change the package name with your package name
Example: 00:06:A5:0E:04:A2:1E:8F:FE:6B:7F:46:23:C3:xx:xx:xx:xx:xx:xx;com.example.androidmapview

You are missing permissions and meta-data for API KEY.
Read this carefully: https://developers.google.com/maps/documentation/android/start

Working with android mapapi v2 ,the main reason is you must add play service to your app,like below :
<permission
android:name="com.example.androidmapview.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.androidmapview.permission.MAPS_RECEIVE" />
Use fragment class in Layout:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
And change your manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidmapview"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<permission
android:name="com.example.androidmapview.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.androidmapview.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.androidmapview.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>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"></meta-data>
</application>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
</manifest>
in activity:
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import com.google.android.gms.maps.SupportMapFragment;
public class MainActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SupportMapFragment fragment = new SupportMapFragment();
getSupportFragmentManager().beginTransaction()
.add(android.R.id.content, fragment).commit();
}
}
For more info check the link which will explain you in details about api v2

I solved my blank screen problem with zoom in/out buttons like that.(it happens after I changed my package name)
Delete the keystore file
Create a new keystore file
Get SHA1 fingerprint
Go to API Console
Create a new Android App.
Paste your fingerprint
Use the given API Key in your Manifest File
That worked for me