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Android Studio problem with "TextView" Class

I was running an app to get the Mac Address of the phone, i did the code and i have no errors in compiling, but if i click on main_activity there's an error under the preview: The following classes could not be found:
- Textview (Change to TextView, Fix Build Path, Edit XML).
In fact I have no output.
That's MainActivity:
package com.example.app1;
import android.bluetooth.BluetoothAdapter;
import android.content.Context;
import android.net.wifi.WifiManager;
import android.provider.Settings;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.telephony.TelephonyManager;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
TextView tvUIDS;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvUIDS = (TextView) findViewById(R.id.tv_uids);
StringBuilder sb = new StringBuilder();
TelephonyManager telMan = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
sb.append("IMEI: " + telMan.getDeviceId() + "\n");
sb.append("Android ID: " + Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID) + "\n");
WifiManager wm = (WifiManager) getSystemService(Context.WIFI_SERVICE);
String mac_adr = wm.getConnectionInfo().getMacAddress();
if (mac_adr != null) {
sb.append("WLAN MAC Address: " + mac_adr + "\n");
} else {
sb.append("WLAN MAC Address: not supported on this device\n");
}
BluetoothAdapter ba = BluetoothAdapter.getDefaultAdapter();
if (ba != null) {
sb.append("Bluetooth Address: " + ba.getAddress() + "\n");
} else {
sb.append("Bluetooth Address: not supported on this device\n");
}
tvUIDS.setText(sb.toString());
}
}
and that's the activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<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">
<Textview
android:id="#+id/tv_uids"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Mac Address" />
</RelativeLayout>
and this is the Manifest:
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<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>
</manifest>
sorry but I'm a newbie in doing apps. How can I solve that?
Thank you!

The following classes could not be found: - Textview (Change to
TextView, Fix Build Path, Edit XML)
It means that you have incorrect tag or unrecognized tag in your xml. You have the following xml in activity_main.xml which is incorrect:
<Textview
android:id="#+id/tv_uids"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Mac Address" />
it should be:
<TextView
android:id="#+id/tv_uids"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Mac Address" />
The correct tag is TextView not Textview.

Exoplayer playing audio even when the PlayerView has been paused

I'm creating an Exoplayer video player which plays a mp4 file containing video and audio from a url. The video and audio plays properly but when the video player is paused, the audio is still being played. I don't know how I can fix this. I'm assuming that the problem occurs due to my android device. I'm leaving my code, app's info, android device info below and a video clip of my problem. If someone can use my code and tell me if they are experiencing the same problem, it will be thankful. Please Help Me.
The app's detail:
Using API 21: Android 5.0 (Lollipop). Contains Internet Permission. Importing implementation 'com.google.android.exoplayer:exoplayer:2.8.1'.
Device detail:
Type: Android Tablet. Android Version : 5.1.1
The MainActivity.java:
import android.content.pm.ActivityInfo;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.ExoPlayerFactory;
import com.google.android.exoplayer2.Format;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.source.ConcatenatingMediaSource;
import com.google.android.exoplayer2.source.ExtractorMediaSource;
import com.google.android.exoplayer2.source.MediaSource;
import com.google.android.exoplayer2.source.MergingMediaSource;
import com.google.android.exoplayer2.source.SingleSampleMediaSource;
import com.google.android.exoplayer2.trackselection.AdaptiveTrackSelection;
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
import com.google.android.exoplayer2.trackselection.TrackSelection;
import com.google.android.exoplayer2.ui.PlayerView;
import com.google.android.exoplayer2.upstream.DataSource;
import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter;
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.util.MimeTypes;
import com.google.android.exoplayer2.util.Util;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity
{
SimpleExoPlayer video_player;
PlayerView player_screen;
DefaultTrackSelector track_selector;
DefaultBandwidthMeter band_width_meter = new DefaultBandwidthMeter();
MediaSource mediaSource_both;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
player_screen = findViewById (R.id.player_screen);
player_screen.requestFocus();
TrackSelection.Factory video_track_selection_factory = new AdaptiveTrackSelection.Factory(band_width_meter);
track_selector = new DefaultTrackSelector(video_track_selection_factory);
video_player = ExoPlayerFactory.newSimpleInstance(this, track_selector);
player_screen.setPlayer(video_player);
video_player.setPlayWhenReady(true);
DataSource.Factory data_source_factory = new DefaultDataSourceFactory(this, Util.getUserAgent(this, "Application Name"), new DefaultBandwidthMeter());
Uri url = Uri.parse("http://dash.akamaized.net/akamai/bbb/bbb_1280x720_60fps_6000k.mp4");
mediaSource_both = new ExtractorMediaSource.Factory(data_source_factory).createMediaSource(url);
video_player.prepare(mediaSource_both);
}
}
The activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
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"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<com.google.android.exoplayer2.ui.PlayerView
android:id="#+id/player_screen"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_gravity="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:use_controller="true" />
</android.support.constraint.ConstraintLayout>
Video Clip of the problem (The video has been uploaded on OpenLoad server):
https://openload.co/embed/NrlMUxUP0C4/problem.mp4

I made a very easy sample app to reproduce the issue
but yet too see any problem neither with the player or video
here is the code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
SimpleExoPlayerView simpleExoPlayerView = findViewById(R.id.player_view);
SimpleExoPlayer player = ExoPlayerFactory.newSimpleInstance(this, new DefaultTrackSelector(new DefaultBandwidthMeter.Builder().build()));
SimpleCache downloadCache = new SimpleCache(new File(getCacheDir(), "exoCache"), new NoOpCacheEvictor());
String uri = "http://dash.akamaized.net/akamai/bbb/bbb_1280x720_60fps_6000k.mp4";
DataSource.Factory dataSourceFactory = new CacheDataSourceFactory(downloadCache, new DefaultDataSourceFactory(this, "seyed"));
MediaSource mediaSource = new ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(Uri.parse(uri));
player.addListener(new Player.EventListener() {
#Override
public void onTimelineChanged(Timeline timeline, Object manifest, int reason) {
Log.d("exo", "timeLine Changed");
}
#Override
public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) {
}
#Override
public void onLoadingChanged(boolean isLoading) {
Log.d("exo", "loding changed= " + isLoading);
}
#Override
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
Log.d("exo", "state changed");
}
#Override
public void onRepeatModeChanged(int repeatMode) {
}
#Override
public void onShuffleModeEnabledChanged(boolean shuffleModeEnabled) {
}
#Override
public void onPlayerError(ExoPlaybackException error) {
Log.e("exo", "exoplayer error", error);
}
#Override
public void onPositionDiscontinuity(int reason) {
}
#Override
public void onPlaybackParametersChanged(PlaybackParameters playbackParameters) {
}
#Override
public void onSeekProcessed() {
Log.d("exo", "seek processed");
}
});
player.prepare(mediaSource);
simpleExoPlayerView.setPlayer(player);
player.setPlayWhenReady(true);
}
here is the layout:
<android.support.design.widget.CoordinatorLayout 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"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<android.support.constraint.ConstraintLayout 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"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".MainActivity"
tools:showIn="#layout/activity_main">
<com.google.android.exoplayer2.ui.SimpleExoPlayerView
android:id="#+id/player_view"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.constraint.ConstraintLayout>
manifest:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.INTERNET" />
<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"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MyDownloadService"
android:exported="false"/>
</application>
and lastly the build gradle file:
dependencies {
implementation 'com.android.support:appcompat-v7:27.0.2'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.android.support:design:27.0.2'
implementation 'com.google.android.exoplayer:exoplayer:2.8.2'
}
Update 17/18/2018
Actually the problem you are facing is because of this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); line.
when you run your activity it starts in portrait mode and everything is fine (without this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);) and one exoplayer is created and starts the playback.
but when you change the orientation during startup of the activity. android trys to destroy the activity and create another one here comes your problem:
first activity does not get destroyed because you forget to realease the ExoPlayer in onDestroy() and when the new activity is created a new exoplayer is also created and both of them keep the playback going. when you pause the playback you actually pausing the second one not the first one. this behavior is called memory leak.
first of all make sure you call .release() in onDestroy() of the activity.
and then for orientation you have couple of options:
1.specify the orientation of the activity in the manifest so android apply it before the creation of the activity
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar"
android:screenOrientation="sensorLandscape">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
2.prevent android from killing the activity on config changes:
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar"
android:configChanges="orientation">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
hope it helps you
you can also chek out this sample (with a small and minor difference) on github:

Android Studio: Flashlight crashes when turning off

Im trying to develop a flashlight app as my first "real" app, and almost everything worked. But everytime I want to turn my flashlight off, my app just crashes. Code and Logcat log follows:
package com.leuchtstein.flashlight;
import android.hardware.Camera;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
public boolean stat = false;
TextView text;
Camera camera;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
text = (TextView) findViewById(R.id.textView);
}
public void triggerlight(View view) {
if (stat == false) {
camera = Camera.open();
Camera.Parameters parameters = camera.getParameters();
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
camera.setParameters(parameters);
camera.startPreview();
text.setText("ON");
stat = true;
} else {
camera = Camera.open();
Camera.Parameters parameters = camera.getParameters();
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
camera.setParameters(parameters);
camera.stopPreview();
camera.release();
text.setText("OFF");
stat = false;
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.leuchtstein.flashlight.MainActivity">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="#string/desc_textview"
android:textAppearance="#android:style/TextAppearance.DeviceDefault.Large"
app:layout_constraintHorizontal_bias="0.95"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="triggerlight"
android:text="Turn on/off"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView"
app:layout_constraintVertical_bias="0.387" />
</android.support.constraint.ConstraintLayout>
Logcat:
https://pastebin.com/tNyF6GvX
Thanks in advance, leuchtstein.
EDIT: Yes, I have the uses-permission function:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.leuchtstein.flashlight">
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<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>
</manifest>

Use the following permission in
AndroidManifest.xml
file
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
And follow this thread for more information
fail-to-connect-to-camera-service

Can't get overlays to show on own testing app

EDIT: Man this is awkward, MKer is right, I corrected the code and now can see the ScaleBar. No luck yet with the my location issue.
I have been trying for a few days and I'm starting to pull my hair. Noob at Android and Osmdroid.
I can build and have done so, with success, osmdroid demo apps. Also tried the OSMbonuspack and had the navigator working with the "find me" overlay, scale, etc.
Problem is whenever I make my own app, the only overlay that shows up and works in my map is the compass. I guess I am doing something wrong but can't find any info on the subject.
I have tested this with Genymotion virtual devices (there not even the compass shows) amd my 6.0 mobile where compass works, but no MyLocation or even Scale.
I have given the app permissions, and all I see in the android log are messages about tiles loading when moving the map. Plus this error which I haven't found much info about except in chinese.
E/IzatSvc_PassiveLocListener: E/Exiting with error virtual void izat_manager::IzatPassiveLocationListener::onLocationChanged(const izat_manager::IzatLocation*, izat_manager::IzatLocationStatus) line 113 "1"
Any help welcome!
Here is my manifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.anemptyappmap">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<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"
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>
</manifest>
Here is MainActivity.java
package com.example.anemptyappmap;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import org.osmdroid.api.IMapController;
import org.osmdroid.tileprovider.constants.OpenStreetMapTileProviderConstants;
import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.ScaleBarOverlay;
import org.osmdroid.views.overlay.compass.CompassOverlay;
import org.osmdroid.views.overlay.compass.InternalCompassOrientationProvider;
import org.osmdroid.views.overlay.mylocation.GpsMyLocationProvider;
import org.osmdroid.views.overlay.mylocation.MyLocationNewOverlay;
public class MainActivity extends AppCompatActivity {
//Vars para mapa
private MyLocationNewOverlay mLocationOverlay;
private CompassOverlay mCompassOverlay=null;
//private MinimapOverlay mMinimapOverlay;
private ScaleBarOverlay mScaleBarOverlay;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Context context = getApplicationContext();
final DisplayMetrics dm = context.getResources().getDisplayMetrics();
OpenStreetMapTileProviderConstants.setUserAgentValue(BuildConfig.APPLICATION_ID);
String cachePath = getCacheDir().getAbsolutePath();
org.osmdroid.tileprovider.constants.OpenStreetMapTileProviderConstants.setCachePath(cachePath);
//important! set your user agent to prevent getting banned from the osm servers
//Configuration.getInstance().load(ctx, PreferenceManager.getDefaultSharedPreferences(ctx));
MapView mMapView = (MapView) findViewById(R.id.mMapView);
mMapView.setTileSource(TileSourceFactory.MAPNIK);
//map.setBuiltInZoomControls(true);
mMapView.setMultiTouchControls(true);
mLocationOverlay = new MyLocationNewOverlay(new GpsMyLocationProvider(context),mMapView);
mLocationOverlay.enableMyLocation();
mLocationOverlay.setDrawAccuracyEnabled(true);
//mLocationOverlay.setPersonIcon();
mLocationOverlay.enableMyLocation();
mMapView.getOverlays().add(this.mLocationOverlay);
mCompassOverlay = new CompassOverlay(context, new InternalCompassOrientationProvider(context), mMapView);
mCompassOverlay.enableCompass();
mMapView.getOverlays().add(this.mCompassOverlay);
mScaleBarOverlay = new ScaleBarOverlay(mMapView);
mScaleBarOverlay.setScaleBarOffset(dm.widthPixels / 2, 10);
mScaleBarOverlay.setCentred(true);
mMapView.getOverlays().add(this.mScaleBarOverlay);
//this.mScaleBarOverlay.setAlignBottom(true);
//this.mScaleBarOverlay.setCentred(true);
this.mScaleBarOverlay.enableScaleBar();
//this.mMinimapOverlay = new MinimapOverlay();
IMapController mapController = mMapView.getController();
mapController.setZoom(13);
GeoPoint startPoint = new GeoPoint(43.3600, -8.2800);
mapController.setCenter(startPoint);
// mMapView.invalidate();
}
}
And the layout
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.anemptyappmap.MainActivity">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/crossfade_content"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<org.osmdroid.views.MapView android:id="#+id/mMapView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>

I cannot get Google Maps API to work on my android Application (V2)

In main2.xml there are apparently no errors. Same thing for main.xml however I think the problem lies here somewhere.
Quick Summary of what the app is: It is meant to use Google Maps onClick of a button but I am getting errors so I can just load the main menu on testing.
XML
I don't have enough rep to post picture so error pic can be found here
main2.xml
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.google.android.gms.maps.MapFragment"/>
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Club Deals"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="#+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="GPS locations" />
<Button
android:id="#+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Closest Deals"
android:onClick="open_close_deals" />
<Button
android:id="#+id/button6"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Cheapest Deals"
android:onClick="open_cheap_deals" />
<Button
android:id="#+id/button7"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Best Value Deals"
android:onClick="best_value" />
<Button
android:id="#+id/button8"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Best Events"
android:onClick="best_events" />
<Button
android:id="#+id/button9"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="News"
android:onClick="news"/>
</LinearLayout>
AppActivity.java
In AppActivity I am given
"map cannot be resolved or is not a field" & "main2 cannot be resolved or is not a field"
package com.example.clubnightsdeals;
import android.R;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
public class AppActivity extends Activity {
Button button;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// addListenerOnButton();
}
public void addListenerOnButton() {
final Context context = this;
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Intent intent = new Intent(getApplicationContext(), App2Activity.class);
startActivity(intent);
}
});
};
public void addListenerOnButtonNews() {
final Context context = this;
button = (Button) findViewById(R.id.button9);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Intent intent = new Intent(getApplicationContext(), App2Activity.class);
startActivity(intent);
}
});
};
/* protected void onCreate1(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
}
*/
// Google Map
GoogleMap googleMap;
protected void onCreate1(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
try {
// Loading map
initilizeMap();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* function to load map. If map is not created it will create it for you
* */
private void initilizeMap() {
if (googleMap == null) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(
R.id.map)).getMap();
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getApplicationContext(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
#Override
protected void onResume() {
super.onResume();
initilizeMap();
}
}
In App2Activity I am given the error "The import com.example.clubnightsdeals.R cannot be resolved"
App2Activity.java
package com.example.clubnightsdeals;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import com.example.clubnightsdeals.R;
public class App2Activity extends Activity {
Button button;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
}
}
Manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.clubnightsdeals"
android:versionCode="1"
android:versionName="1.0" >
<permission
android:name="info.androidhive.googlemapsv2.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-sdk
android:minSdkVersion="12"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:label="#string/clubnightsdeals"
android:name=".AppActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<uses-library
android:name="com.google.android.maps" />
<activity
android:label="#string/clubnightsdeals"
android:name=".App2Activity" >
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyDetfYqNFORnvtR245fht3RIK25T6DRY" />
  <activity
            android:name="info.androidhive.googlemapsv2.MainActivity"
            android:label="#string/app_name"
            android:theme="#style/AppBaseTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
</application>
</manifest>

You are pointing to wrong R.java file. Replace your following import line
import android.R;
with
import com.example.clubnightsdeals.R;
in your AppActivity.java file.

Your error shows that you have not closed the <activity> tag in your manifest file.
Make sure you have closed your activity tag as <activity android:name=""...../> or <activity android:name=""> </activity>

First remove
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
in manifest (cannot have 2 start activity in a App) then try to import R library.
If it still has this R error, check your xml files - make sure check all xml files.