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Android app not starting after i added admob activity

I am not able to load my android app after i added the admob activity to the project. I have added an Intestitial type admob activity.
AdmobActivity layout file
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".AdmobActivity">
<!-- view for AdMob Interstitial Ad -->
<TextView
android:id="#+id/app_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp"
android:text="#string/interstitial_ad_sample"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/level"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/app_title"
android:layout_centerHorizontal="true"
android:text="#string/start_level"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="#+id/next_level_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="#string/next_level" />
Manifest file:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher_round"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.AppCompat.DayNight.NoActionBar"
android:usesCleartextTraffic="true">
<!-- Include the AdActivity configChanges and theme. -->
<activity android:name=".AdmobActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:theme="#android:style/Theme.Translucent" />
<activity
android:name=".MainActivity"
AdmobActivity.java
package com.mtapp.quizapp;
import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.InterstitialAd;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class AdmobActivity extends AppCompatActivity {
// Remove the below line after defining your own ad unit ID.
private static final String TOAST_TEXT = "Test ads are being shown. "
+ "To show live ads, replace the ad unit ID in res/values/strings.xml with your own ad unit ID.";
private static final int START_LEVEL = 1;
private int mLevel;
private Button mNextLevelButton;
private InterstitialAd mInterstitialAd;
private TextView mLevelTextView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_admob);
// Create the next level button, which tries to show an interstitial when clicked.
mNextLevelButton = ((Button) findViewById(R.id.next_level_button));
mNextLevelButton.setEnabled(false);
mNextLevelButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
showInterstitial();
}
});
// Create the text view to show the level number.
mLevelTextView = (TextView) findViewById(R.id.level);
mLevel = START_LEVEL;
// Create the InterstitialAd and set the adUnitId (defined in values/strings.xml).
mInterstitialAd = newInterstitialAd();
loadInterstitial();
// Toasts the test ad message on the screen. Remove this after defining your own ad unit ID.
Toast.makeText(this, TOAST_TEXT, Toast.LENGTH_LONG).show();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_admob, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private InterstitialAd newInterstitialAd() {
InterstitialAd interstitialAd = new InterstitialAd(this);
interstitialAd.setAdUnitId(getString(R.string.interstitial_ad_unit_id));
interstitialAd.setAdListener(new AdListener() {
#Override
public void onAdLoaded() {
mNextLevelButton.setEnabled(true);
}
#Override
public void onAdFailedToLoad(int errorCode) {
mNextLevelButton.setEnabled(true);
}
#Override
public void onAdClosed() {
// Proceed to the next level.
goToNextLevel();
}
});
return interstitialAd;
}
private void showInterstitial() {
// Show the ad if it's ready. Otherwise toast and reload the ad.
if (mInterstitialAd != null && mInterstitialAd.isLoaded()) {
mInterstitialAd.show();
} else {
Toast.makeText(this, "Ad did not load", Toast.LENGTH_SHORT).show();
goToNextLevel();
}
}
private void loadInterstitial() {
// Disable the next level button and load the ad.
mNextLevelButton.setEnabled(false);
AdRequest adRequest = new AdRequest.Builder()
.setRequestAgent("android_studio:ad_template").build();
mInterstitialAd.loadAd(adRequest);
}
private void goToNextLevel() {
// Show the next level and reload the ad to prepare for the level after.
mLevelTextView.setText("Level " + (++mLevel));
mInterstitialAd = newInterstitialAd();
loadInterstitial();
}
}
build.gradle contains implementation 'com.google.android.gms:play-services-ads:19.2.0'

Android Action Bar and Menu Options are missing

I am having difficulty with showing my Action bar that is suppose to be at the top. Everytime I use a ListView, the ActionBar with all my menu options on top disappears on me. Can someone shed some light on why this happening with the ListView.
MainActivity Class:
public class MainActivity extends Activity {
ListView listView;
ArrayAdapter<String> adapter;
String[] android_versions = {"Cupcake",
"Donut",
"Eclair",
"Froyo",
"Gingerbread",
"Honeycomb",
"Ice Cream Sandwich",
"Jelly Bean",
"KitKat",
"Lollipop"};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android_versions);
listView.setAdapter(adapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.farrellequipment.www.listview" >
<application
android:allowBackup="true"
android:icon="#mipmap/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>
</application>
</manifest>
Layout activity_main.xml file:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context=".MainActivity">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/listView"
android:layout_gravity="left|top" />
</RelativeLayout>
Menu menu_main.xml file
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">
<item android:id="#+id/action_settings" android:title="#string/action_settings"
android:orderInCategory="100" app:showAsAction="never" />
</menu>
Styles.xml file
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
</style>
</resources>
It is a simple straight forward app but I am missing the ActionBar and Menu Options I need for this app. Again can someone please shed some light on the problem. I have been searching this problem for about 4 hours now and I need help. Thank you in advance.

You just need to replace Activity to AppCompatActivity
public class MainActivity extends AppCompatActivity {
ListView listView;
ArrayAdapter<String> adapter;
String[] android_versions = {"Cupcake",
"Donut",
"Eclair",
"Froyo",
"Gingerbread",
"Honeycomb",
"Ice Cream Sandwich",
"Jelly Bean",
"KitKat",
"Lollipop"};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android_versions);
listView.setAdapter(adapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}

Your #style/AppTheme probably extends a .NoActionBar theme, make sure that's not the case.

You should inherit your Activity from AppCompatActivity (https://developer.android.com/reference/android/support/v7/app/AppCompatActivity.html) from the Support Library instead from the plain Acitivty class.
You should also inherit your app theme from Theme.AppCompat.
See also Difference between extending LifecycleActivity,Activity,ActionbarActivity & AppCompactActivity?

App installed from android studio keeps crashing on my phone

ive just started with android developement and wondering why my app keeps crashing.... I'm trying to change activities as of now.....heres my code
package app.dm.com.tictac;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
public class MainActivity extends ActionBarActivity{
Button b;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b=(Button)findViewById(R.id.b1);
b.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i=new Intent(getApplicationContext(),twoP.class);
startActivity(i);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
This is my XML code
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:background="#4285f4"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity">
<TextView
android:textColor="#FFF"
android:textSize="30dp"
android:text="TIC TAC TOE" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/b1"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="98dp"
android:text="Play 1v1"
/>
</RelativeLayout>
The second class:
package app.dm.com.tictac;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
/**
* Created by damian on 23/4/15.
*/
public class twoP extends MainActivity{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.one_v);
Button b=(Button)findViewById(R.id.b2);
b.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i=new Intent(getApplicationContext(),MainActivity.class);
startActivity(i);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
And here is its XML code
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xlmns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:background="#4285f4"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Random BS "
android:textColor="#FFF"
android:textSize="30dp"
android:id="#+id/textView2" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Go Back"
android:id="#+id/b2"
android:layout_gravity="center_vertical"
android:layout_below="#+id/textView2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="98dp" />
</RelativeLayout>
Once i install the app onto my device it just shows "Unfortunately ticTac has stopped". I really am not sure what my mistake is .Any help would be appreciated....Thank You
MY android manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="app.dm.com.tictac" >
<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>
<activity android:name=".twoP">
</activity>
</application>
</manifest>
Here is the logcat file:
https://drive.google.com/file/d/0B9Hzti3K8FV7WTRlb0U1LTJyZVU/view?usp=sharing

Try after replacing getApplicationContext() to MainActivity.this
And even after that the error not goes then please post the error logs here.

In your first xml you have android:layout_below="#+id/b1. You probably meant to typeandroid:id="#+id/b2
In your code, you call b=(Button)findViewById(R.id.b1); however there is no Button with that id, therefor b is assigned null. Afterwards, you try to assign to that an onClickListener and the app crashes.
This is exactly what this line is telling you:
04-23 19:42:21.979: E/AndroidRuntime(13918): java.lang.RuntimeException: Unable to start activity ComponentInfo{app.dm.com.tictac/app.dm.com.tictac.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Your error is -
java.lang.RuntimeException: Unable to start activity ComponentInfo{app.dm.com.tictac/app.dm.com.tictac.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
It occurs at app.dm.com.tictac.MainActivity.onCreate(MainActivity.java:21)
You are using
b=(Button)findViewById(R.id.b1); but you don't have a button with this id defined anywhere in any of the layout files. I think you meant to use in the layout file of the first activity.

cannot use SessionLoginBehaviour SSO_WITH_FALLBACK

Even after defining com.facebook.LoginActivity in my AndroidManifest.xml file the logcat gives the same error and asks to define com.facebook.LoginActivity as activity. I have followed this https://developers.facebook.com/docs/android/login-with-facebook/v2.2#step2 tutorial.
Here is my androidmanifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.log"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.log.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.facebook.sdk.ApplicationId"
android:value="#string/facebook_app_id" />
<activity
android:name="com.facebook.loginActivity"
android:label="#string/app_name" >
</activity>
</application>
</manifest>
MainActivity.java
package com.example.log;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
public class MainActivity extends FragmentActivity {
private MainFragment mainFragment;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.fragment_main);
if (savedInstanceState == null) {
// Add the fragment on initial activity setup
mainFragment = new MainFragment();
getSupportFragmentManager()
.beginTransaction()
.add(android.R.id.content, mainFragment)
.commit();
} else {
// Or set the fragment from restored state info
mainFragment = (MainFragment) getSupportFragmentManager()
.findFragmentById(android.R.id.content);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class MainFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main, container, false);
return view;
}
}
}
fragment_main.xml file
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.facebook.widget.LoginButton
android:id="#+id/authButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="30dp"
/>
</LinearLayout>

The facebook login activity is com.facebook.LoginActivity with a capital 'L'. You're using a lower case l.

Webview App doesn't work

I am developing an application where I am using a webview. I'm just a beginner in Android and I started to deal with webViews When i tried it in my emulator it doesn't show up. Would really appreciate your help. I am currently using eclipse juno 32 bit windows . I am currently stuck here . This is
MainActivity.java
package bulku.lucky;
import android.support.v7.app.ActionBarActivity;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebView;
#SuppressLint("SetJavaScriptEnabled") public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// applications are run through the emulator
//to access "localhost" from the emulator
String url = "http://e-promotion.al/";
WebView view = (WebView) this.findViewById(R.id.webView1);
view.getSettings().setJavaScriptEnabled(true);
view.loadUrl(url);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
activity_main.xml
<WebView
android:id="#+id/webView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
AndroidManifest.xml
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" tools:ignore="OldTargetApi"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#android:style/Theme.Black.NoTitleBar" >
<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>

Try adding this to your onCreate (you MUST add a new method and call him in your activity, onCreate method must be as clean as you can, it's just a tip.)
String url = "http://e-promotion.al/";
WebView view = (WebView) this.findViewById(R.id.webView1);
view.getSettings().setJavaScriptEnabled(true);
WebSettings settings = view.getSettings();
settings.getJavaScriptEnabled();
settings.getBuiltInZoomControls();
settings.setBuiltInZoomControls(true); // I use that to show a map in my app, you can delete this line if you want.
view.setWebViewClient(new WebViewClient());
view.loadUrl(url);