StatusBar Notification in Android

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" >

    <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="96dp"

        android:text="Send Notification" />

    <Button

        android:id="@+id/button2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignRight="@+id/button1"

        android:layout_below="@+id/button1"

        android:layout_marginTop="81dp"

        android:text="Stop Notification" />

</RelativeLayout>

MainActivity.java:

package com.statusbarnotification.ram;

import android.app.Activity;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

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;

public class MainActivity extends Activity {

NotificationManager notificationManager;

Notification notification;

int NOTIFICATION_ID = 1;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Button sendNotification = (Button) findViewById(R.id.button1);

Button stopNotification = (Button) findViewById(R.id.button2);

notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

int icon = R.drawable.player;

String tickerText = "hi you have notification";

long when = System.currentTimeMillis();

notification = new Notification(icon, tickerText, when);

Intent in = new Intent(getApplicationContext(), MainActivity.class);

PendingIntent pendingIntent = PendingIntent.getActivity(

getApplicationContext(), 0, in, 0);

String contentTitle = "Notification title";

String contentText = "Notification description";

notification.setLatestEventInfo(getApplicationContext(), contentTitle,

contentText, pendingIntent);

sendNotification.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

notificationManager.notify(NOTIFICATION_ID, notification);

}

});

stopNotification.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

notificationManager.cancel(NOTIFICATION_ID);

}

});

}

}

AsyncTask in Android(2)

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" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:padding="@dimen/padding_medium"

        android:text="@string/async_task"

        tools:context=".AsyncTaskActivity" />

    <ProgressBar

        android:id="@+id/progress"

        style="?android:attr/progressBarStyleHorizontal"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_below="@+id/textView1"

        android:layout_marginTop="34dp" />

    <Button

        android:id="@+id/btn_start"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/progress"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="40dp"

        android:minWidth="120dp"

        android:text="@string/start_btn" />

    <TextView

        android:id="@+id/txt_percentage"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_below="@+id/progress"

        android:text="downloading  0%"

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

</RelativeLayout>

MainActivity.java:

package com.async.ram;

import android.os.AsyncTask;

import android.os.Bundle;

import android.os.SystemClock;

import android.app.Activity;

import android.view.View;

import android.widget.Button;

import android.widget.ProgressBar;

import android.widget.TextView;

import android.widget.Toast;

public class AsyncTaskActivity extends Activity {

Button btn_start;

ProgressBar progressBar;

TextView txt_percentage;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_async_task);

btn_start = (Button) findViewById(R.id.btn_start);

progressBar = (ProgressBar) findViewById(R.id.progress);

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

btn_start.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

btn_start.setEnabled(false);

new ShowDialogAsyncTask().execute();

}

});

}

private class ShowDialogAsyncTask extends AsyncTask<Void, Integer, Void> {

int progress_status;

@Override

protected void onPreExecute() {

// update the UI immediately after the task is executed

super.onPreExecute();

progress_status = 0;

txt_percentage.setText("downloading 0%");

}

@Override

protected Void doInBackground(Void... params) {

while (progress_status < 100) {

progress_status += 2;

publishProgress(progress_status);

SystemClock.sleep(300);

}

return null;

}

@Override

protected void onProgressUpdate(Integer... values) {

super.onProgressUpdate(values);

progressBar.setProgress(values[0]);

txt_percentage.setText("downloading " + values[0] + "%");

}

@Override

protected void onPostExecute(Void result) {

super.onPostExecute(result);

txt_percentage.setText("download complete");

btn_start.setEnabled(true);

}

}

}

Fragment Example in Android(2)

activity_main.xml:

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

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="horizontal" >

    <TextView

        android:layout_width="0px"

        android:layout_height="match_parent"

        android:layout_weight="1"

        android:background="#555555"

        android:text="It's TextView in main Activity"

        android:textColor="#ffccff"

        android:textSize="30dp" />

    <FrameLayout

        android:id="@+id/myfragment"

        android:layout_width="0px"

        android:layout_height="match_parent"

        android:layout_weight="4" >

    </FrameLayout>

</LinearLayout>

fragmentlayout.xml:

<?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:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="It's a Fragment" />

    <ImageView

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:src="@drawable/ic_launcher" />

</LinearLayout>

MyFragment.java:

package com.example.frag5;

import android.annotation.SuppressLint;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

@SuppressLint("NewApi")

public class MyFragment extends Fragment {

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container,

Bundle savedInstanceState) {

// TODO Auto-generated method stub

View myFragmentView = inflater.inflate(R.layout.fragmentlayout,

container, false);

return myFragmentView;

}

}

MainActivity.java:

package com.example.frag5;

import android.annotation.SuppressLint;

import android.app.FragmentTransaction;

import android.os.Bundle;

import android.support.v4.app.FragmentActivity;

public class MainActivity extends FragmentActivity {

@SuppressLint("NewApi")

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

FragmentTransaction fragmentTransaction = getFragmentManager()

.beginTransaction();

MyFragment myFragment = new MyFragment();

fragmentTransaction.add(R.id.myfragment, myFragment);

fragmentTransaction.commit();

}

}

Fragment example in Android(1)

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"

    tools:context=".MainActivity" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Large Text"

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

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Button" />

    <fragment

        android:id="@+id/frag"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        class="com.example.frag4.MainActivity$SSFFragment" />

</LinearLayout>

hellofrag.xml:

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

<TextView

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

   android:layout_width="fill_parent"

   android:layout_height="wrap_content"

   android:text="hello"

/>

MainActivity.java:

package com.example.frag4;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

@SuppressLint("NewApi")

public static class SSFFragment extends Fragment {

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container,

Bundle savedInstanceState) {

// Inflate the layout for this fragment

View v = inflater.inflate(R.layout.hellofrag, container, false);

return v;

}

}

}

GalleryView in Android

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"

    tools:context=".MainActivity" >

    <Gallery

        android:id="@+id/gallery1"

        android:layout_width="match_parent"

        android:layout_height="fill_parent" />

</LinearLayout>

MainActivity.java:

package com.ram.galleryview;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.Gallery;

import android.widget.ImageView;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Gallery g = (Gallery) findViewById(R.id.gallery1);

ImageAdapter ia = new ImageAdapter();

g.setAdapter(ia);

}

class ImageAdapter extends BaseAdapter {

@Override

public int getCount() {

// TODO Auto-generated method stub

return images.length;

}

@Override

public Object getItem(int arg0) {

// TODO Auto-generated method stub

return null;

}

@Override

public long getItemId(int arg0) {

// TODO Auto-generated method stub

return 0;

}

@Override

public View getView(int position, View view, ViewGroup vg) {

// TODO Auto-generated method stub

ImageView image = new ImageView(getApplicationContext());

image.setImageResource(images[position]);

return image;

}

}

int[] images = { R.drawable.p1, R.drawable.p2, R.drawable.p3,

R.drawable.p4, R.drawable.p5, R.drawable.p6, R.drawable.p7,

R.drawable.p8, R.drawable.p9, R.drawable.p10 };

}

GridView in Android

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"

    tools:context=".MainActivity" >

    <GridView

        android:id="@+id/gridView1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:numColumns="3" >

    </GridView>

</LinearLayout>

MainActivity.java:

package com.ram.gridview;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.GridView;

import android.widget.ImageView;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

GridView grid = (GridView) findViewById(R.id.gridView1);

ImageAdapter ia = new ImageAdapter();

grid.setAdapter(ia);

}

class ImageAdapter extends BaseAdapter {

@Override

public int getCount() {

// TODO Auto-generated method stub

return images.length;

}

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return null;

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return 0;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

ImageView image = new ImageView(getApplicationContext());

image.setLayoutParams(new GridView.LayoutParams(100, 100));

image.setImageResource(images[position]);

return image;

}

}

int[] images = { R.drawable.p1, R.drawable.p2, R.drawable.p3,

R.drawable.p4, R.drawable.p5, R.drawable.p6, R.drawable.p7,

R.drawable.p8, R.drawable.p9, R.drawable.p10 };

}

Scanning Wifi networks and Finding Strongest network in Android

main.xml:

<?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" >

    <Button

        android:id="@+id/Scan"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Scan" >

    </Button>

    <ScrollView

        android:id="@+id/Scroll"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" >

        <TextView

            android:id="@+id/Status"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:text="WiFiDemo" />

    </ScrollView>

</LinearLayout>

WiFiScanReceiver.java:

package com.wifiapp1.inspire.ram;

import java.util.List;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.net.wifi.ScanResult;

import android.net.wifi.WifiManager;

import android.widget.Toast;

public class WiFiScanReceiver extends BroadcastReceiver {

  WifiApp1Activity wifiDemo;

  public WiFiScanReceiver(WifiApp1Activity wifiDemo) {

    super();

    this.wifiDemo = wifiDemo;

  }

  @Override

  public void onReceive(Context c, Intent intent) {

    List<ScanResult> results = wifiDemo.wifi.getScanResults();

    ScanResult bestSignal = null;

    for (ScanResult result : results) {

      if (bestSignal == null

          || WifiManager.compareSignalLevel(bestSignal.level, result.level) < 0)

        bestSignal = result;

    }

    String message = String.format("%s networks found. %s is the strongest.",

        results.size(), bestSignal.SSID);

    Toast.makeText(wifiDemo, message, Toast.LENGTH_LONG).show();

   

  }

}

WifiApp1Activity.java:

package com.wifiapp1.inspire.ram;

import java.util.List;

import android.app.Activity;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.IntentFilter;

import android.net.wifi.WifiConfiguration;

import android.net.wifi.WifiInfo;

import android.net.wifi.WifiManager;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

public class WifiApp1Activity extends Activity implements OnClickListener {

WifiManager wifi;

BroadcastReceiver receiver;

TextView textStatus;

Button buttonScan;

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

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

// Setup UI

textStatus = (TextView) findViewById(R.id.Status);

buttonScan = (Button) findViewById(R.id.Scan);

buttonScan.setOnClickListener(this);

// Setup WiFi

wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);

// Get WiFi status

WifiInfo info = wifi.getConnectionInfo();

textStatus.append("\n\nWiFi Status: " + info.toString());

// List available networks

List<WifiConfiguration> configs = wifi.getConfiguredNetworks();

for (WifiConfiguration config : configs) {

textStatus.append("\n\n" + config.toString());

}

// Register Broadcast Receiver

if (receiver == null)

receiver = new WiFiScanReceiver(this);

registerReceiver(receiver, new IntentFilter(

WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

}

public void onClick(View view) {

Toast.makeText(this, "Scanning.......",

Toast.LENGTH_LONG).show();

 

wifi.startScan();

}

}

AndroidManifest.xml:

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

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

    package="com.wifiapp1.inspire.ram"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" />

    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:name=".WifiApp1Activity"

            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>