Develop Reference

How to display map using fragment

MainActivity.java
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import android.os.Bundle;
import android.annotation.TargetApi;
import android.app.Activity;
public class MainActivity extends Activity
{
static final LatLng latlng = new LatLng(13 , 80);
private GoogleMap googleMap;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
if (googleMap == null) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
}
googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
Marker mar = googleMap.addMarker(new MarkerOptions().
position(latlng).title("Google Map"));
} catch (Exception e) {
e.printStackTrace();
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
manifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<permission
android:name="com.example.mapp.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.mapp.permission.MAPS_RECEIVE" />
<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_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" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main" >
<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="AIzaSyDXYlSDkAo4z45GwjRkE2qiNMQoFeQCDUY" />
</application>
</manifest>
Am new to android .i dont know how to display map using fragment.this is my code.i dont get map.my program is unfortunately stopped.and i got error in logcat:No Activity Found to handle.can anyone help me please

You need to activate Google Map API V2 from your google developer console, from there you need to generate map api key, then you need to give that key to map.
Additionally, you need to declare some classes in Android Manifect file, after that you can see map. Its a process and you must need to follow it.
Just visit some good sites like :https://developers.google.com/maps/documentation/android/start

Try this......
<fragment
android:id="#+id/map"
android:class="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
Instead of..
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>

Here is the complete code to show google maps v2..
activity_main.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.movingmarkergooglemaps.MainActivity"
tools:ignore="MergeRootFrame" >
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="fill_parent"
android:layout_height="match_parent" />
MainActivity.java
package com.example.movingmarkergooglemaps;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMarkerDragListener;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity{
GoogleMap Mmap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
gps=new GPSTracker(MainActivity.this);
Mmap=((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
}
#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 PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
return rootView;
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<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" >
<uses-library android:name="com.google.android.maps" />
<activity
android:name="com.example.movingmarkergooglemaps.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.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="**Replace with your key**" />
</application>
Dont forget add google-play-services_lib

location manager in Android apps

I create simple android apps which show location of device but when I run in emulator it show error in run the apps.
package my.loc;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;
public class LocActivity extends Activity {
/** Called when the activity is first created. */
TextView textView;
#Override
public void onCreate(Bundle savedInstanceState) {
textView = (TextView) findViewById(R.id.text_view);
LocationManager manager =
(LocationManager) getSystemService(Context.LOCATION_SERVICE);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Location loc =
manager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
textView.setText("latitude: " + loc.getLatitude()
+ "\nlongitude: " + loc.getLongitude());
} }
Activity.xml file is such As
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/text_view"
/>
and manifest is such as
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="my.loc"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:label="#string/app_name"
android:name=".LocActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Error is:
The application loc has stopped unexpected.

You must have your class implement LocationListener and call manager.requestLocationUpdates() in order to obtain location information. See further details at http://developer.android.com/training/location/receive-location-updates.html

Not able to dynamically add items to RelativeLayout one below other

I'm facing a problem in adding items one below the other for relativeLayout created dynamically. I'm not able to see the first element added to it . Everytime I'm able to see only the last element added to it.
I'm providing here with this mail java source code & xml file . Please help me in sorting out this issue:
DynamicRelativeLayoutActivity.java
==================================
package com.andr.rlayout;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.RelativeLayout;
import android.widget.ScrollView;
import android.widget.TextView;
public class DynamicRelativeLayoutActivity extends Activity {
/** Called when the activity is first created. */
RelativeLayout rLayout;
ScrollView sview;
RelativeLayout dynamiclayout;
LinearLayout horizontalllayout;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.rlayout);
sview = (ScrollView)findViewById(R.id.slayout);
dynamiclayout = new RelativeLayout(DynamicRelativeLayoutActivity.this);
dynamiclayout.setBackgroundColor(Color.WHITE);
sview.addView(dynamiclayout);
RelativeLayout.LayoutParams lp_btn;
horizontalllayout = new LinearLayout(DynamicRelativeLayoutActivity.this);
horizontalllayout.setOrientation(android.widget.LinearLayout.HORIZONTAL);
TextView tv = new TextView(DynamicRelativeLayoutActivity.this);
tv.setText("Hi");
horizontalllayout.addView(tv);
lp_btn = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
lp_btn.addRule(RelativeLayout.BELOW);
dynamiclayout.addView(horizontalllayout, lp_btn);
horizontalllayout = new LinearLayout(DynamicRelativeLayoutActivity.this);
horizontalllayout.setOrientation(android.widget.LinearLayout.HORIZONTAL);
TextView tv1 = new TextView(DynamicRelativeLayoutActivity.this);
tv1.setText("Hello");
horizontalllayout.addView(tv1);
lp_btn = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
lp_btn.addRule(RelativeLayout.BELOW);
dynamiclayout.addView(horizontalllayout, lp_btn);
}
}
rlayout.xml
===========
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/slayout"
>
</ScrollView>
</RelativeLayout>
AndroidManifest.xml
-==================
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.andr.rlayout"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".DynamicRelativeLayoutActivity"
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>

//add id to your horizontalllayout view
horizontalllayout.setId(100);
//then call
lp_btn.addRule(RelativeLayout.BELOW,horizontalllayout.getId());
//finally at end add to your scroll view
sview.addView(dynamiclayout);

How to use third-party jar file in Android

I know this question asked before but any answer helped me.
I want to use SVG but Android can't see SVG jar. I added build path. And I attach library resuorce as libs folder. And also added tag in Android Manifest. But it didn't work.
Regards
Here is my Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.svgexample2"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.svgexample2.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>
<uses-library android:name="svg-android" android:required="true" />
</application>
</manifest>
My Main Activity :
package com.example.svgexample2;
import com.larvalabs.svgandroid.SVG;
import com.larvalabs.svgandroid.SVGParser;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.Menu;
import android.widget.ImageView;
import android.widget.RelativeLayout;
public class MainActivity extends Activity {
RelativeLayout mainLayout;
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
ImageView myImg;
SVG svgFile;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mainLayout = new RelativeLayout(this);
myImg = new ImageView(this);
myImg.setBackgroundColor(Color.WHITE);
SVG svgFile = SVGParser.getSVGFromResource(getResources(), R.drawable.image);
myImg.setImageDrawable(svgFile.createPictureDrawable());
mainLayout.addView(myImg);
setContentView(mainLayout);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
Here is my additional svgandroid.xml file :
<?xml version="1.0" encoding="utf-8">
<permissions>
<libraryname="svg-android" file="/home/breed/dev/Android/androidWorkspace/SvgExample2/libs/"/>
</permissions>

AFAIK there is no need that you place a uses-library in your Manifest. The svgandroid.xml should be useless, too. Just place the .jar files in the libs folder from your Android Eclipse Project.

Android SecurityException ACCESS_WIFI_STATE

I am building an Android app that uses wifi.
I have properly declared these uses permissions in the manifest, however for some reason the app is throwing a SecurityException that causes the app to force-close.
I traced the cause of the security exception in LogCat to the system saying it doesn't have the access_wifi_state permission. This is strange and confusing to me because I have already declared it in the manifest.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="android.wifi"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="ACCESS_WIFI_STATE" />
<uses-permission android:name="CHANGE_WIFI_STATE" />
<uses-feature android:name="android.hardware.wifi" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name="android.wifi.AndroidWiFiActivity"
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>
And here is the code that causes the exception:
package android.wifi;
import android.app.Activity;
import android.content.Context;
import android.net.wifi.WifiManager;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;
import android.wifi.R;
public class AndroidWiFiActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView tv = (TextView) findViewById(R.id.textbox);
tv.setText("ABC 123");
WifiManager wifiMgr = (WifiManager) getSystemService(Context.WIFI_SERVICE);
if(wifiMgr.isWifiEnabled())
{
tv.append("Wifi is enabled");
}
else
{
tv.append("Wifi is disabled");
}
}
}
Any help is greatly appreciated. Thanks.

The permission is:
android.permission.ACCESS_WIFI_STATE