ramsandroid: December 2013

Monday, 30 December 2013

Download project : ForwardGeoCodingExample.zip

activity_main.xml:

MainActivity.java:

package com.ram.forwardgeocoding;

import java.io.IOException;
import java.util.List;

import android.app.Activity;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {
    EditText edit;
    TextView text;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);

       edit = (EditText) findViewById(R.id.editText);
       text = (TextView) findViewById(R.id.textView);

       Button findBtn = (Button) findViewById(R.id.button_find);

       findBtn.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View v) {
               String address = edit.getText().toString();

               Geocoder geoCoder = new Geocoder(getApplicationContext());

               try {
                   List<Address> locations = geoCoder.getFromLocationName(
                           address, 1);

                   for (Address a : locations) {
                       double latti = a.getLatitude();
                       double longi = a.getLongitude();

                       text.append(latti + "," + longi);
                   }

               } catch (IOException e) {
                   // TODO Auto-generated catch block
                   e.printStackTrace();
               }

           }
       });

    }
}

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.ram.forwardgeocoding"
    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.ram.forwardgeocoding.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>

Wednesday, 25 December 2013

IntentService with WebService Example

activity_main.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="getData"
        android:text="get data" />

    <ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/textView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceLarge" />
        </LinearLayout>
    </ScrollView>

</LinearLayout>

MyWebService.java:
package com.ram.intentservice;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.IntentService;
import android.content.Intent;

public class MyWebService extends IntentService {

    public MyWebService() {
        super("DownloadService");
        // TODO Auto-generated constructor stub
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(
                "http://www.cheesejedi.com/rest_services/get_big_cheese.php?puzzle=");

        try {

            HttpResponse response = httpclient.execute(httppost);
            String jsonResult = inputStreamToString(
                    response.getEntity().getContent()).toString();

            if (jsonResult != null) {
                sendResultBroadcast(jsonResult);
            }

        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private StringBuilder inputStreamToString(InputStream is) {
        String rLine = "";
        StringBuilder answer = new StringBuilder();

        InputStreamReader isr = new InputStreamReader(is);

        BufferedReader rd = new BufferedReader(isr);

        try {
            while ((rLine = rd.readLine()) != null) {
                answer.append(rLine);
            }
        }

        catch (IOException e) {
            e.printStackTrace();
        }
        return answer;
    }

    void sendResultBroadcast(String jsonResult) {
        Intent in = new Intent();

        in.putExtra("jsonresult", jsonResult);

        in.setAction("com.ram.CUSTOM_BROADCAST");

        sendBroadcast(in);
    }
}

MainActivity.java:
package com.ram.intentservice;

import org.json.JSONArray;
import org.json.JSONException;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends Activity {
    TextView textView;
    ProgressDialog pd;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);

       registerReceiver(new WebServiceBroadcast(), new IntentFilter(
               "com.ram.CUSTOM_BROADCAST"));

       textView = (TextView) findViewById(R.id.textView);

    }

    public void getData(View v) {
       pd = ProgressDialog.show(MainActivity.this, "loading", "plz wait");

       Intent intentService = new Intent(getApplicationContext(),
               MyWebService.class);
       startService(intentService);
    }

    class WebServiceBroadcast extends BroadcastReceiver {

       @Override
       public void onReceive(Context context, Intent intent) {

           pd.cancel();

           String jsonResult = intent.getStringExtra("jsonresult");

           JSONArray jsonArray = null;

           try {
               jsonArray = new JSONArray(jsonResult);

               for (int i = 0; i < jsonArray.length(); i++) {

                   textView.append("id: "
                           + jsonArray.getJSONObject(i).getString("id")
                                   .toString() + "\n");

                   textView.append("level: "
                           + jsonArray.getJSONObject(i).getString("level")
                                   .toString() + "\n");
                   textView.append("time_in_secs: "
                           + jsonArray.getJSONObject(i)
                                   .getString("time_in_secs").toString()
                           + "\n");
                   textView.append("par: "
                           + jsonArray.getJSONObject(i).getString("par")
                                   .toString() + "\n");
                   textView.append("initials: "
                           + jsonArray.getJSONObject(i).getString("initials")
                                   .toString() + "\n");
                   textView.append("quote: "
                           + jsonArray.getJSONObject(i).getString("quote")
                                   .toString() + "\n");
                   textView.append("time_stamp: "
                           + jsonArray.getJSONObject(i)
                                   .getString("time_stamp").toString() + "\n");
                   textView.append("" + "\n");

               }
           } catch (JSONException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }

       }

    }
}

AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.ram.intentservice"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <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.ram.intentservice.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>
        <service android:name="MyWebService"></service>
    </application>

</manifest>

Wednesday, 11 December 2013

Android Interview Questions and Answers

http://blog.icorethink.com/interviewque/android-interview-questions-and-answers/

Using HttpURLConnection class in Android

Download this project---->HttpUrlConnection.zip
ScreenShot:

activity_main.xml:

<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:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

<TextView

android:id="@+id/textView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:layout_marginLeft="17dp"

android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>

MainActivity.java:

package com.ram.httpurlconnection;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.os.Bundle;

import android.os.StrictMode;

import android.widget.TextView;

@SuppressLint("NewApi")

public class MainActivity extends Activity {

TextView text;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

text = (TextView) findViewById(R.id.textView);

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()

.permitAll().build();

StrictMode.setThreadPolicy(policy);

try {

// The URI class can be used to manipulate URLs of any protocol.

URL url = new URL("http://www.google.com");

// Obtain a new HttpURLConnection by calling URL.openConnection()

// and casting the result to HttpURLConnection.

HttpURLConnection con = (HttpURLConnection) url.openConnection();

// Returns an InputStream for reading data from the resource pointed

// by this URLConnection

readStream(con.getInputStream());

} catch (Exception e) {

e.printStackTrace();

* Toast.makeText(getApplicationContext(), e.getMessage(),

* Toast.LENGTH_LONG).show();

text.setText(e.getMessage());

}

private void readStream(InputStream in) {

StringBuffer sb = new StringBuffer();

BufferedReader reader = null;

try {

reader = new BufferedReader(new InputStreamReader(in));

String line = "";

while ((line = reader.readLine()) != null) {

sb.append(line);

}

text.setText(sb.toString());

} catch (IOException e) {

e.printStackTrace();

} finally {

if (reader != null) {

try {

reader.close();

} catch (IOException e) {

e.printStackTrace();

}

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.ram.httpurlconnection"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="18" />

<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.ram.httpurlconnection.MainActivity"

android:label="@string/app_name" >

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

Monday, 9 December 2013

Internal Storage Example in Android

Download this example here : InernalStorage.zip
Screen Shots:

you can check file creation in DDMS Perspective as follows:

activity_main.xml:

MainActivity.java:

package com.ram.internalstorage;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    private EditText editFile, editText;
    private TextView text;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);

       editFile = (EditText) findViewById(R.id.editText_filename);
       editText = (EditText) findViewById(R.id.editText_text);
       text = (TextView) findViewById(R.id.textView_display);

       Button saveBtn = (Button) findViewById(R.id.button_save);
       Button viewBtn = (Button) findViewById(R.id.button_view);

       saveBtn.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View arg0) {
               String fileName = editFile.getText().toString();
               String textToSave = editText.getText().toString();

               try {
                   FileOutputStream fos = openFileOutput(fileName + ".txt",
                           MODE_PRIVATE);

                   fos.write(textToSave.getBytes());

                   fos.close();

                   Toast.makeText(getApplicationContext(),
                           "file created and text saved", Toast.LENGTH_LONG)
                           .show();
               } catch (FileNotFoundException e) {
                   // TODO Auto-generated catch block
                   e.printStackTrace();
               } catch (IOException e) {
                   // TODO Auto-generated catch block
                   e.printStackTrace();
               }
           }
       });

       viewBtn.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View v) {
               // TODO Auto-generated method stub

               try {
                   FileInputStream fis = openFileInput(editFile.getText()
                           .toString() + ".txt");

                   StringBuffer sb = new StringBuffer();

                   int i;

                   while ((i = fis.read()) != -1) {

                       sb.append((char) i);
                   }

                   fis.close();

                   text.setText(sb.toString());
               } catch (FileNotFoundException e) {
                   // TODO Auto-generated catch block
                   e.printStackTrace();
               } catch (IOException e) {
                   // TODO Auto-generated catch block
                   e.printStackTrace();
               }

           }
       });
    }
}

Thursday, 5 December 2013

REST+JSON Web service Example in Android.

Download this project-->REST+JSONWebserviceExample.zip
output:

activity_main.xml:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/ScrollView1"

android:layout_width="match_parent"

android:layout_height="match_parent" >

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content" >

<TextView

android:id="@+id/textView1"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>

</ScrollView>

MainActivity.java:

package com.ram.restjsonwebserviceexample;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import org.apache.http.HttpResponse;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.json.JSONArray;

import org.json.JSONException;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.os.Bundle;

import android.os.StrictMode;

import android.widget.TextView;

@SuppressLint("NewApi")

public class MainActivity extends Activity {

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()

.permitAll().build();

StrictMode.setThreadPolicy(policy);

setContentView(R.layout.activity_main);

HttpClient httpclient = new DefaultHttpClient();

HttpPost httppost = new HttpPost(

"http://www.cheesejedi.com/rest_services/get_big_cheese.php?puzzle=");

TextView textView = (TextView) findViewById(R.id.textView1);

try {

HttpResponse response = httpclient.execute(httppost);

String jsonResult = inputStreamToString(

response.getEntity().getContent()).toString();

JSONArray jsonArray = new JSONArray(jsonResult);

for (int i = 0; i < jsonArray.length(); i++) {

textView.append("id: "

+ jsonArray.getJSONObject(i).getString("id").toString()

+ "\n");

textView.append("level: "

+ jsonArray.getJSONObject(i).getString("level")

.toString() + "\n");

textView.append("time_in_secs: "

+ jsonArray.getJSONObject(i).getString("time_in_secs")

.toString() + "\n");

textView.append("par: "

+ jsonArray.getJSONObject(i).getString("par")

.toString() + "\n");

textView.append("initials: "

+ jsonArray.getJSONObject(i).getString("initials")

.toString() + "\n");

textView.append("quote: "

+ jsonArray.getJSONObject(i).getString("quote")

.toString() + "\n");

textView.append("time_stamp: "

+ jsonArray.getJSONObject(i).getString("time_stamp")

.toString() + "\n");

textView.append("-------------------------------------------------"

+ "\n");

}

// textView.setText(jsonResult);

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} catch (JSONException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

private StringBuilder inputStreamToString(InputStream is) {

String rLine = "";

StringBuilder answer = new StringBuilder();

InputStreamReader isr = new InputStreamReader(is);

BufferedReader rd = new BufferedReader(isr);

try {

while ((rLine = rd.readLine()) != null) {

answer.append(rLine);

}

catch (IOException e) {

e.printStackTrace();

}

return answer;

}

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.ram.restjsonwebserviceexample"

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.ram.restjsonwebserviceexample.MainActivity"

android:label="@string/app_name" >

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

Tuesday, 3 December 2013

Custom BroadcastReceiver in Android

This example will show you how to create our own custom BroadCastReceiver in Android.

ScreenShots:

strings.xml:

<?xml version="1.0" encoding="utf-8"?>

<string name="app_name">CustomBroadcastReceiver</string>

<string name="action_settings">Settings</string>

<string name="hello_world">Hello world!</string>

<string name="textview_title">Custom BroadCast Receiver example</string>

<string name="button_title">Custom BroadCast</string>

</resources>

activity_main.xml:

<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:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentTop="true"

android:layout_centerHorizontal="true"

android:layout_marginTop="108dp"

android:text="@string/button_title"

android:onClick="customBroadCast"/>

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentTop="true"

android:layout_centerHorizontal="true"

android:layout_marginTop="18dp"

android:text="@string/textview_title"

android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>

CustomBroadCast.java:

package com.ram.custombroadcastreceiver;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.widget.Toast;

public class CustomBroadCast extends BroadcastReceiver {

@Override

public void onReceive(Context context, Intent arg1) {

Toast.makeText(context, "BroadCast Detected", Toast.LENGTH_LONG).show();

}

MainActivity.java:

package com.ram.custombroadcastreceiver;

import android.app.Activity;

import android.content.Intent;

import android.content.IntentFilter;

import android.os.Bundle;

import android.view.View;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

registerReceiver(new CustomBroadCast(), new IntentFilter(

"com.ram.CUSTOM_BROADCAST"));

}

public void customBroadCast(View v) {

Intent intent = new Intent();

intent.setAction("com.ram.CUSTOM_BROADCAST");

sendBroadcast(intent);

}

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.ram.custombroadcastreceiver"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="19" />

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.ram.custombroadcastreceiver.MainActivity"

android:label="@string/app_name" >

<intent-filter>

</intent-filter>

</activity>

<!--

<intent-filter>

</action>

</intent-filter>

</receiver>

-->

</application>

</manifest>

ramsandroid

Monday, 30 December 2013

Updated Google Android Maps API v2 Tutorial

Forward GeoCoding Example

Wednesday, 25 December 2013

IntentService with WebService Example

Wednesday, 11 December 2013

Android Interview Questions and Answers

Using HttpURLConnection class in Android

Monday, 9 December 2013

Internal Storage Example in Android

Thursday, 5 December 2013

REST+JSON Web service Example in Android.

Tuesday, 3 December 2013

Custom BroadcastReceiver in Android