I have been trying to implement Native Ads from admob.
I got some sample code from Github. I tried to implement this code, and the demo code works fine. The native ads show up properly.
I then created my own Admob account and obtained an Ad Unit ID. The previous demo code for native ad did not work with this id, and I got an error with error code 0 although my created Ad Unit ID works fine for banner type ads.
Can someone help me out?
guys i have facing same issue and finally i have a solution for it hope this will you all..:)
Here in this image when you are trying to create an AdUnitId make sure that the width and height here will be same width and height in the XML file like this
<com.google.android.gms.ads.NativeExpressAdView
android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
ads:adSize="360x320"
ads:adUnitId="#string/NativeAdId">
</com.google.android.gms.ads.NativeExpressAdView>
One more thing you have to keep in mind that the width and height you
are going to make ad will be fit in your xml layout ,So for this just
first try It in your xml and then create an Native add for this.
Just try it and feel free to tell me if you will be facing any problem after doing this. Thank you
Try the following code:
XML file:
<com.google.android.gms.ads.AdView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_alignParentBottom="true"
android:id="#+id/adView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
ads:adSize="BANNER"
ads:adUnitId="ca-app-pub-xxxxxxxxx" />
The .java class:
AdView adView = (AdView) this.findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder()
// Add a test device to show Test Ads
//.addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
//.addTestDevice("B2D638A0BEECBE3464024D83BE163E0E")
.build();
// Load ads into Banner Ads
adView.loadAd(adRequest);
Make sure to open the commented lines:
.addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
.addTestDevice("B2D638A0BEECBE3464024D83BE163E0E")
when you are in debug mode.Clicks on real Ads in debug mode may result in blocking of your Admob account.You will get the testDevice id in your logcat,replace that with that of mine.
Define the following in your manifest.xml
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:theme="#android:style/Theme.Translucent" />
and also the permission:
<uses-permission android:name="android.permission.INTERNET" />
and you are ready to go.
**Note:**If ads are not showing up then wait atleast for 30 mins.
Recently I stucked with the same question. Then I decided to post my solution for that to admobadapter. Hope it will help you.
The basic usage could look like:
ListView lvMessages;
AdmobAdapterWrapper adapterWrapper;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initListViewItems();
}
/**
* Inits an adapter with items, wrapping your adapter with a {#link AdmobAdapterWrapper} and setting the listview to this wrapper
* FIRST OF ALL Please notice that the following code will work on a real devices but emulator!
*/
private void initListViewItems() {
lvMessages = (ListView) findViewById(R.id.lvMessages);
//creating your adapter, it could be a custom adapter as well
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1);
adapterWrapper = new AdmobAdapterWrapper(this);
adapterWrapper.setAdapter(adapter); //wrapping your adapter with a AdmobAdapterWrapper.
//here you can use the following string to set your custom layouts for a different types of native ads
//adapterWrapper.setInstallAdsLayoutId(R.layout.your_installad_layout);
//adapterWrapper.setcontentAdsLayoutId(R.layout.your_installad_layout);
//Sets the max count of ad blocks per dataset, by default it equals to 3 (according to the Admob's policies and rules)
adapterWrapper.setLimitOfAds(3);
//Sets the number of your data items between ad blocks, by default it equals to 10.
//You should set it according to the Admob's policies and rules which says not to
//display more than one ad block at the visible part of the screen,
// so you should choose this parameter carefully and according to your item's height and screen resolution of a target devices
adapterWrapper.setNoOfDataBetweenAds(10);
//It's a test admob ID. Please replace it with a real one only when you will be ready to deploy your product to the Release!
//Otherwise your Admob account could be banned
//String admobUnitId = getResources().getString(R.string.banner_admob_unit_id);
//adapterWrapper.setAdmobReleaseUnitId(admobUnitId);
lvMessages.setAdapter(adapterWrapper); // setting an AdmobAdapterWrapper to a ListView
//preparing the collection of data
final String sItem = "item #";
ArrayList<String> lst = new ArrayList<String>(100);
for(int i=1;i<=100;i++)
lst.add(sItem.concat(Integer.toString(i)));
//adding a collection of data to your adapter and rising the data set changed event
adapter.addAll(lst);
adapter.notifyDataSetChanged();
}
And the result will look like this
when i first implemented admob from my newly created admob account, it took my account 2 days to finally get the ads, so dont worry, just wait...also if your account is not newly created, then see if you added this permission or not
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
Related
I'm testing this on Android Studio on a Samsung S8. I'm using the following dependency for ads:
implementation 'com.google.android.gms:play-services-ads:15.0.0'
So the first code I added was to initialize mobile ads:
In MainActivity.onCreate()
MobileAds.initialize(this,"ca-app-pub-3940256099942544~3347511713");
Then I create a simple banner ad, load it, and display it (in MainActivity.onStart())
banner_ad = new AdView(this);
banner_ad.setAdSize(AdSize.BANNER);
banner_ad.setAdUnitId("ca-app-pub-3940256099942544/6300978111");
AdRequest adRequest = new AdRequest.Builder().build();
banner_ad.loadAd(adRequest);
In both cases, testing_ads is true. It just makes the AdUnitId set to the test unit id.
I dont know if this is necessary at all, but I added it anyway in AndroidManifest.xml:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
I get this message:
I/Ads: Ad is not visible. Not refreshing ad.
Scheduling ad refresh 60000 milliseconds from now.
No ads of any kind are displaying though, and for some reason my app is slowing down drastically. What am I doing wrong?
Please note that you haven't added your AdView to the view hierarchy. Here is how to do it,
banner_ad = new AdView(this);
banner_ad.setAdSize(AdSize.BANNER);
banner_ad.setAdUnitId("ca-app-pub-3940256099942544/6300978111");
// Get the Layout of Main activity
// Add the banner_ad view to the layout
// Now your ad will be visible
// Following is just an example. Replace with your actual main layout!
// LinearLayout mainView = (LinearLayout)findViewById(R.id.main_view);
// mainView.addView(banner_ad);
I have a problem with my Android App which I'm trying to add ads for, the weird thing is that the ad loads perfectly on the first activity, but none of the others. I've followed the instructions on https://developers.google.com/admob/android/existing-app, but to no avail it still only works with the first activity. I have a different Ad Unit ID for each activity that I have ads on as well, and have copy-pasted them from the website to avoid mistakes, and have removed all whitespace.
The response I get is:
There was a problem getting an ad response. ErrorCode: 0
Failed to load ad: 0
I've done research on why I'd get this response from AdMob, and I've tried the solutions I have found, they are to add the correct version (and check for updates) of the Google Play Services to my build.gradle file, to add the version to my manifest file, I am running it on the stock rom that came with a real phone (LG G4 running Lollipop) I even tried on a different phone which was also running stock Android to get the same result.
The way I load the ads onto my page is with this code:
AdView mAdView = (AdView) findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
This is the same on every activity with ads on it.
This is a snippet of my Manifest file:
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
Finally, this is the ad snippet of my layout file, which is also the same in all of my layouts:
<com.google.android.gms.ads.AdView
android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
ads:adSize="BANNER"
ads:adUnitId="#string/banner_home">
</com.google.android.gms.ads.AdView>
I have a string resource for each different activity Ad Unit ID.
It just started working, I changed nothing. Maybe there was a problem building it before? Who knows, thanks for all the help though guys.
AdView adView = findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder()
.addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
.build();
adView.loadAd(adRequest);
Whenever you load Admob banner ad this gives 0 error.This is just because you have not signed it.you must load and show Test admob Banner ad.if test ad is servering perfectly then you will get right ad in signed apk.0 error may be just because you have not signed apk
did you added this line in your manifest file?
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />
or try like this
Open your adMob account and create new sets of keys,and put this keys(banner/interstitial)in your project.this is happens to me once i fixed like this,try this solution. or still issues create new app (just change the name) in adMob and create new keys
So I have a project (module really since I'm using IntelliJ, but I'll use Eclipse terms) with Activity (Let's call it X) which loads an AdView and it all works just fine. Now I have another Activity (let's call it Y) which opens after certain actions, that Activity is inside a library project. Activity Y opens just fine and works well but the AdView I add to it never has anything in it, it is just just blank. Here are some odd messages I see on the logs:
I/Ads﹕ Starting ad request.
I/webclipboard﹕ clipservice: android.sec.clipboard.ClipboardExManager#4293f940
W/ResourceType﹕ Requesting resource 0x7f0b000e failed because it is complex
E/GooglePlayServicesUtil﹕ The Google Play services resources were not found. Check your project configuration to ensure that the resources are included.
I/Adreno200-EGLSUB﹕ <ConfigWindowMatch:2087>: Format RGBA_8888.
onSizeChanged - w:640 h:100
W/ResourceType﹕ Requesting resource 0x7f0b000e failed because it is complex
E/GooglePlayServicesUtil﹕ The Google Play services resources were not found. Check your project configuration to ensure that the resources are included.
W/ResourceType﹕ Requesting resource 0x7f0b000e failed because it is complex
E/GooglePlayServicesUtil﹕ The Google Play services resources were not found. Check your project configuration to ensure that the resources are included.
These two messages happen later, after a bit of time (close to the 60 seconds):
W/Ads﹕ Timed out waiting for WebView to finish loading.
I/Ads﹕ Scheduling ad refresh 60000 milliseconds from now.
W/Ads﹕ Failed to load ad: 2
And here is the code I use to create the AdView:
adView = new AdView(this);
adView.setAdSize(AdSize.BANNER);
adView.setAdUnitId(id);
buttonsAndSeekbarLayout.addView(adView);
final AdRequest.Builder builder = new AdRequest.Builder();
AdRequest adRequest = builder.build();
// Start loading the ad in the background.
adView.loadAd(adRequest);
I should also mention that I am using other parts of the Google Play Services on that library project so I think it is configured correctly.
Thanks.
EDIT: I should mention that even if I add the adView on the xml it is still just blank!
EDIT2: Added some extra messages above. Also I noticed this message which after doing a search seems to be AdView related:
D/WebKit﹕ SQLite database failed to load from /FileSyetmQuota.db
EDIT3: I found something odd. I added in app purchase to that screen, when the purchase is done, right before I remove the ad (because of the purchase), it shows up for a split of a second.
E/GooglePlayServicesUtil﹕ The Google Play services resources were not found. Check your project configuration to ensure that the resources are included.. Ignore that message, it appears even when you've running your GP services correctly, that's not the issue.
The code part where you create your AdView and load an ad is perfect, that's neither the issue (I'm running exactly the same code on several projects and it works).
Having in account the above, my bets are just two:
Somehow, the library project is interfering with the loading of the ad. Ad loading has a timeout, if you're doing some hard work, probably there's no time enough to load the ad and it times-out, so probably that's why you're seeing the Timed out waiting for WebView to finish loading. message. In this case, try putting the ad loading within a Thread (or an AsyncTask).
A layout rendering issue. You have to check whether the Ad has enough space to show up, i.e., 640 in width x 100 in height minimally. If you don't have that space, the ad won't show up.
---- EDIT ----
To run the code within a Thread, use this code:
new Thread(
new Runnable() {
#Override
public void run() {
adView = new AdView(this);
adView.setAdSize(AdSize.BANNER);
adView.setAdUnitId(id);
// This will ensure it is run within the main UI.
runOnUiThread(new Runnable() {
public void run() {
buttonsAndSeekbarLayout.addView(adView);
}
});
final AdRequest.Builder builder = new AdRequest.Builder();
AdRequest adRequest = builder.build();
// Start loading the ad in the background.
adView.loadAd(adRequest);
}
}
}).start();
hey please try to load ads like bellow example
first update your Google play lib to 4.3
The easiest way to incorporate an ad is to simply define your AdView as you would any other part of your res/layout/main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.gms.ads.AdView android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
ads:adUnitId="MY_AD_UNIT_ID"
ads:adSize="BANNER"/>
</LinearLayout>
you must replace MY_AD_UNIT_ID with your AdMob ad unit ID.
To fetch ads, look up the AdView as a resource via findViewById, create an AdRequest, and invoke loadAd:
import com.google.android.gms.ads.*;
public class BannerExample extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Look up the AdView as a resource and load a request.
AdView adView = (AdView)this.findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
adView.loadAd(adRequest);
}
}
Figured it out, in my code I call webViewInstance.pauseTimers() and apparently that applies to all web views.
Im trying to integrate admob ads into my app and I've been trying to follow the tutorials on Google's APIs and their code is causing my entire app to crash.
I want to think it's because I'm testing on my phone and I havent included adRequest.addTestDevice("TEST_DEVICE_ID"); because to obtain your device id you first need to request an ad, and I am failing exactly where I am requesting an ad.
This is what I have in my main.java taken line for line from androids api tutorials. Log cat says it's crashing at adView.loadAd(adRequest);
// Look up the AdView as a resource and load a request.
AdView adView = (AdView)this.findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
adView.loadAd(adRequest);
Here's the XML
<com.google.android.gms.ads.AdView
android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
ads:adSize="BANNER"
ads:adUnitId="adUnitId"
/>
and finally here is what log cat has to say: http://imgur.com/UfB45YF
referenced api: https://developers.google.com/mobile-ads-sdk/docs/admob/fundamentals#play
Do you think it's crashing because I don't have my test device ID included? Or is there something else happening?
If it crashing on adView.loadAd with a NullPointerException then you have no View called R.id.adView in that Activity's layout.
Look at your Activity's onCreate and what layout you have specified in setContentView. and make sure that you aren't also using something like libGDX AndroidApplication which sets it own ContentView.
Finally do a clean build.
If you are putting the code in MainActivity.java and you have multiple layouts associated ie:
activity_main.xml
sw600dp\activity_main.xml
sw720dp\activity_main.xml
then you need to put the com.google.android.gms.ads.AdView xml code in each layout regardless of what device you are testing for.
That was my problem. Hope this helps others.
Also be sure the set your dependencies and change your manifest.
I had the same problem. When I was debugging I saw an error about the google play services version number being incorrect, and it showed the real value. I added this value to the strings.xml file:
<integer name="google_play_services_version">7095000</integer>
Once it was in, everything ran fine.
I am trying to implement Admob in Android and I am seeing requests coming into AdMob. However, I am not seeing the Admob ads being displayed on the Android screen in the emulator and my Android test phones as well.
As stated before, I can see the requests coming into my AdMob account. However, the content is not being shown. Is there something that needs to be enabled in my account, the main.xml, AndroidManifest.xml, or in the loading of the application?
My application configuration and code are below. Please advise on what is needed. Thanks!
AndroidManifest:
<meta-data
android:value="My Publisher ID"
android:name="ADMOB_PUBLISHER_ID" />
<activity android:name="com.admob.android.ads.AdMobActivity"/>
<receiver
android:name="com.admob.android.ads.analytics.InstallReceiver"
android:exported="true">
<intent-filter>
<action android:name="com.android.vending.INSTALL_REFERRER"/>
</intent-filter>
</receiver>
<meta-data
android:value="true"
android:name="ADMOB_ALLOW_LOCATION_FOR_ADS"/>
main:
<com.google.ads.AdView
android:id="#+id/adView"
android:layout_alignParentBottom="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
ads:adSize="BANNER"
ads:adUnitId="My Publisher ID"
ads:loadAdOnCreate="true"/>
On Create Code:
AdView adView = (AdView)this.findViewById(R.id.adView);
AdRequest re = new AdRequest();
re.setTesting(true);
adView.loadAd(re);
Any help is appreciated!!
Make sure that the layout the AdView is embedded in does not impose any padding on the AdView. The AdView's size has to be exactly 320x50 dip. It does not show up if it does not get enough room.
Also check the log output of your device. In Eclipse switch to the DDMS perspective, select your device and watch the LogCat output.
I had a similar issue. If you have any padding on your parent layout then you may not have enough width for the ads. If you have it in a portrait view try switching to a landscape view to see if it shows. If it does than you most likely have a width issue somewhere in your layout.
It usually takes some time for ads to start appearing via admob. This happens in the case when you have just registered on admob and started up with your first application. If the suggestions given above are taken care of and if your admob page shows a "green" status, I wont worry about it too much. Once your fill rate increases, you will start to see more and more ads.
Go to app settings on admob.com and make sure use location
data for ads is turned off if your app is not a location based app.
Use location data for ads is used to filter ads based on location and
works only on app with location permission granted. If app does not use
location permission, ads will not show.
Make sure your have filled payment details
Be sure that your Admob layout is displaying in xml view. Put your admob view inside RelativeLayout and try to use android:alignparentBottom:true
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!--Do our code that you want to show in xml -->
<!--Put adview in bottom of screen -->
<com.google.ads.AdView
android:id="#+id/adView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
ads:adSize="BANNER"
android:layout_alignParentBottom="true"
ads:adUnitId="#string/addmob_id"
ads:loadAdOnCreate="true"
ads:testDevices="HT9CWP803129" />
</RelativeLayout>
</LinearLayout>
In your java code put these lines in onCreate method
// Load addvertisment
AdView adView = (AdView) findViewById(R.id.adView);
// Request for Ads
AdRequest adRequest = new AdRequest.Builder().addTestDevice("FF9CD441FA62FD456D7D571B91DD11DD").build();
adView.loadAd(adRequest);
This worked in my code, Hope it will help you too.
Be carefull with the id, there are 2 codes: the editor number (like this: pub-xxxxxxxxxxxxxxxx) and the other is the banner id (like this: ca-app-pub-xxxxxxxxxxxxxxxx/xxxxxxxxxx)
You need to use the last one, if you use the first doesnt work:)
You are using
ads:adUnitId="My Publisher ID"
replace it with
ads:adUnitId="Here AdUnitId for this app"
Note: You have to create app on Admob and you will get AdUnitId for that created app. You don't have to use Publisher ID.
I see there are two problems in your code based on what you posted:-
The <metadata> section should contain the ADMOB_APP_ID instead of your
publisher ID. This should be declared under <application> tag in
ApplicationManifest.xml.
<meta-data
android:name="com.google.android.gms.ads.APPLICATION_ID"
android:value="[ADMOB_APP_ID]"/>
you can find ADMOB_APP_ID by on ADMOB dashboard, click on the application
and check "App Settings". You can see the APP_ID which starts
typically with ca-app-pub-0123456789012345.
The second problem is, where you have declared AdView in your layout.
Remember you have to provide Ad unit not your publisherID, which
you can create in ADMOB dashboard by clicking on Ad Unit tab
under your application. Put the correct "ad unit" against your
AdView as below.
ads:adUnitId="ca-app-pub-3940256099942544/6300978111" <!-- remember this is adUnit not App ID and this value above is for test banner Ad. -->
Once you have fixed above problems, do the following:-
MobileAds.initialize(this, "YOUR_ADMOB_APP_ID"); in onCreate of your first Activity. This needs to be done only once and thus the right place is either your first activity or at application's onCreate callback.
Find the AdView in the activity onCreate where you have included AdView in the layout.
mAdView = findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
Test Ads work by providing test adunit published by google.
mAdView.setAdSize(AdSize.BANNER);
mAdView.setAdUnitId("ca-app-pub-3940256099942544/6300978111");
Additionally, if you want to handle Ad events, do as follows:-
mAdView.setAdListener(new AdListener() {
#Override
public void onAdLoaded() {
// Code to be executed when an ad finishes loading.
}
#Override
public void onAdFailedToLoad(int errorCode) {
// Code to be executed when an ad request fails.
}
#Override
public void onAdOpened() {
// Code to be executed when an ad opens an overlay that
// covers the screen.
}
#Override
public void onAdLeftApplication() {
// Code to be executed when the user has left the app.
}
#Override
public void onAdClosed() {
// Code to be executed when when the user is about to return
// to the app after tapping on an ad.
}
});
Some of these possible solutions may sound obvious, but make sure you have these completed:
-replace "My Publisher ID" in android:value="My Publisher ID" with your actual publisher ID.
-make sure to include the internet permission in your manifest file:
<uses-permission android:name="android.permission.INTERNET" />
If you have completed those, you can also try placing the following code in the "On create" section instead of your current:
AdView adView = (AdView)this.findViewById(R.id.adView);
AdRequest adRequest = new AdRequest();
adRequest.setTesting(true);
adView.loadAd(adRequest);
adView.loadAd(new AdRequest());
or
AdManager.setTestDevices( new String[] {AdManager.TEST_EMULATOR});
AdView adView = (AdView)findViewById(R.id.adView);
adView.requestFreshAd();
Before publishing, don't forget be sure to get rid of the setTestDevice though!
make sure, your admob publisher ID is correct. It had happend with me once and I could not figure out the error for about 15 days.
In Admob every app that you submit gets a different publisher ID. It is unique per Application and not per User.
It might be an issue with the space, you need to ensure that the space is available for the ad to be displayed. If you have a padding on the parent layout it might reduce the space available. According to the google Admob docs no ad will be displayed if the space isn't there for it to be displayed.
"The SDK will request whatever size the requesting AdView was instantiated with. If there isn't enough space on the device's screen to display the ad, nothing will be shown."
So my suggestion is to ensure no padding is on the parent layout and actually assign a height and width to the banner ad like this
<com.google.ads.AdView
android:id="#+id/adView"
android:layout_alignParentBottom="true"
android:layout_width="#dimen/banner_width"
android:layout_height="#dimen/banner_height"
ads:adSize="BANNER"
ads:adUnitId="My Publisher ID"
ads:loadAdOnCreate="true"/>
And store the appropriate dimensions in your dimens.xml in the values folder.
This is because admin inventory requires some requests to be generated to check that the app can make some profit!
Please let setup the ads properly and publish the app, after about 1k requests are made, the ads will automatically show up!
I too was suffering from this problem and got my answer when I published my own app!
If admob "App Id" and "Unit Id" is correct then upload on google play store it will show the add.
I was facing same type of issue but after upload on google play it resolve automatic.
My ads were shown by just having few request here are the following steps I made
Get More Requests You are saying that 400 imp but no ads just make another ad unit in same app it will start showing I also did this this method and ad started In my previous ad unit it have many request but no imp then I made another unit it started showing ads
Have patient in my account it take 4 days to show ads and my account was approved by Google in 1 hr it take a lot of time to build inventory in the server so be patient you will have your ads
Complaint Google at admob complatint they will check your app and chances of app is approved is 50-50%