Send SMS android

SmsManager sm = SmsManager.getDefault();
sm.sendTextMessage("03336851469", null, "abc", null, null);


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

Implement shape of oval using XML in Android

/res/drawable/oval.xml

<?xml version="1.0" encoding="utf-8"?>
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">

    <gradient
        android:angle="90"
        android:startColor="#FF000000"
        android:endColor="#FFFFFFFF"
        android:type= "linear" />   
    <stroke
        android:width="1dp"
        android:color="#FF000000" />
    <padding
        android:left="15dp"
        android:top="15dp"
        android:right="15dp"
        android:bottom="15dp" />
</shape>

Layout with shape of oval.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="10dp"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:background="@drawable/oval" >
        
        <ImageView 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_launcher"
            android:background="@drawable/oval" />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="normal TextView"
            android:layout_margin="5dp" />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TextView with roundrect"
            android:layout_margin="5dp"
            android:background="@drawable/oval" />
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="normal EditText"
            android:layout_margin="5dp" />
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="EditText with roundrect"
            android:text="Hello"
            android:layout_margin="5dp"
            android:background="@drawable/oval" />
    </LinearLayout>

</LinearLayout>

Get memory information of Android Deveice

Example to get memory information using Runtime.

package com.example.androidmem;

import android.os.Bundle;
import android.app.Activity;
import android.widget.TextView;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        TextView memInfo = (TextView)findViewById(R.id.meminfo);
        
        String info = "";
        
        info += "Total memory: " + Runtime.getRuntime().totalMemory() + "\n";
        info += "Free memory: " + Runtime.getRuntime().freeMemory() + "\n";
        info += "Max memory: " + Runtime.getRuntime().maxMemory() + "\n";
        
        memInfo.setText(info);
    }

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    <TextView
        android:id="@+id/meminfo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

Circle on Android Google MAP

Draw Circle on GoogleMap

With Google Play services v3.0, now we can draw circle on Google Maps API V2. To use the new feature, you have to update Android SDK Platform-tools.

The code modify from the exercise of Draw Polygon on GoogleMap.

package com.example.androidmapsv2;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.CircleOptions;
import com.google.android.gms.maps.model.LatLng;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.FragmentManager;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity 
 implements OnMapLongClickListener{
 
 final int RQS_GooglePlayServices = 1;
 private GoogleMap myMap;
 
 TextView tvLocInfo;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  tvLocInfo = (TextView)findViewById(R.id.locinfo);
  
  FragmentManager myFragmentManager = getFragmentManager();
  MapFragment myMapFragment 
   = (MapFragment)myFragmentManager.findFragmentById(R.id.map);
  myMap = myMapFragment.getMap();

  myMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);

  myMap.setOnMapLongClickListener(this);

 }
 
 @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;
 }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
     case R.id.menu_legalnotices:
      String LicenseInfo = GooglePlayServicesUtil.getOpenSourceSoftwareLicenseInfo(
        getApplicationContext());
      AlertDialog.Builder LicenseDialog = new AlertDialog.Builder(MainActivity.this);
      LicenseDialog.setTitle("Legal Notices");
      LicenseDialog.setMessage(LicenseInfo);
      LicenseDialog.show();
         return true;
     }
  return super.onOptionsItemSelected(item);
 }

 @Override
 protected void onResume() {

  super.onResume();

  int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
  
  if (resultCode == ConnectionResult.SUCCESS){
   Toast.makeText(getApplicationContext(), 
     "isGooglePlayServicesAvailable SUCCESS", 
     Toast.LENGTH_LONG).show();
  }else{
   GooglePlayServicesUtil.getErrorDialog(resultCode, this, RQS_GooglePlayServices);
  }
  
 }

 @Override
 public void onMapLongClick(LatLng point) {
  tvLocInfo.setText("New circle added@" + point.toString());
  
  CircleOptions circleOptions = new CircleOptions()
  .center(point)   //set center
  .radius(1000)   //set radius in meters
  .fillColor(Color.RED)
  .strokeColor(Color.BLACK)
  .strokeWidth(5);
  
  myMap.addCircle(circleOptions);
 }

}

Download the files.

Android GPS Method for Calculate the distance between two GPS coordinates..

A simple function that takes two GPS coordinates as input and outputs the distance between them in meter. 

private double gps2m(float lat_a, float lng_a, float lat_b, float lng_b) {

  float pk = (float) (180/3.14169);

  float a1 = lat_a / pk;

  float a2 = lng_a / pk;

  float b1 = lat_b / pk;

  float b2 = lng_b / pk;

  float t1 = FloatMath.cos(a1)*FloatMath.cos(a2)*

     FloatMath.cos(b1)*FloatMath.cos(b2);

  float t2 = FloatMath.cos(a1)*FloatMath.sin(a2)*

     FloatMath.cos(b1)*FloatMath.sin(b2);

  float t3 = FloatMath.sin(a1)*FloatMath.sin(b1);

  double tt = Math.acos(t1 + t2 + t3);

  return 6366000*tt;

}