onClick open browser with given URL

onClick open browser with given URL

Output :

// on click its open in browser with url = http://www.google.com


Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse("http://www.google.com"));

intent.setComponent(new ComponentName("com.android.browser",
"com.android.browser.BrowserActivity"));

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

getApplicationContext().startActivity(intent);

Line Chart using achartengine

Here, 2 Line Graphs

1. Random values
2. Sin()

• Download achartengine-1.1.0.jar
• import in lib

MainActivity.java

package com.example.linechatachart;

import org.achartengine.ChartFactory;
import org.achartengine.chart.PointStyle;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.model.XYSeries;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.view.Menu;

public class MainActivity extends Activity {

private static final int SERIES_NR = 2;

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

Intent intent = ChartFactory.getLineChartIntent(this, getDataset(),
getRenderer());
startActivity(intent);
}

private XYMultipleSeriesDataset getDataset() {
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
final int n = 30;
double v = 0;

// Random r = new Random();

XYSeries series1 = new XYSeries("Demo series 1");

for (int i = 0; i < n; i++) {
v += 0.9;
series1.add(i, Math.sin(v));
}

XYSeries series2 = new XYSeries("Demo series 2");

series2.add(1.0, 4.2);
series2.add(5.0, 6.2);
series2.add(3.5, 12.2);
series2.add(12.3, 23.2);
series2.add(25.0, 14.2);
series2.add(14.0, 2.2);
series2.add(5.5, 9.2);
series2.add(10.3, 12.2);
series2.add(8, 25);
series2.add(5, 15.2);

dataset.addSeries(series2);
dataset.addSeries(series1);

return dataset;
}

private XYMultipleSeriesRenderer getRenderer() {
XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
renderer.setAxisTitleTextSize(20);
renderer.setChartTitleTextSize(20);
renderer.setLabelsTextSize(25);
renderer.setLegendTextSize(25);
renderer.setPointSize(5f);
renderer.setMargins(new int[] { 20, 30, 15, 0 });
XYSeriesRenderer r = new XYSeriesRenderer();
r.setColor(Color.BLUE);
r.setPointStyle(PointStyle.SQUARE);
r.setFillBelowLine(true);
r.setFillBelowLineColor(Color.rgb(225, 225, 225));
r.setFillPoints(true);
renderer.addSeriesRenderer(r);
r = new XYSeriesRenderer();
r.setPointStyle(PointStyle.CIRCLE);
r.setColor(Color.RED);
r.setFillPoints(true);
r.setFillBelowLine(true);
// r.setFillBelowLineColor(Color.rgb(234, 241, 245));
renderer.addSeriesRenderer(r);
renderer.setAxesColor(Color.DKGRAY);
renderer.setLabelsColor(Color.LTGRAY);
return renderer;
}

@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;
}


}



-----------------------------------------------------------------------------------------------------------------------


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


</RelativeLayout>

-----------------------------------------------------------------------------------------------------------------------

OutPut:

How to Change Size of Text in WebView in android

WebSettings settings= webview.getSettings();

settings.setTextSize(WebSettings.TextSize.NORMAL);

Database Helper Class Example

public class DBHelper extends SQLiteOpenHelper

{

       private static final String DATABASE_NAME = "Student";

       private static final int DATABASE_VERSION =  1;

       private static final String TABLE_USER = "Marks";

       private SQLiteDatabase db;

       private static String DB_PATH = "";

       private Context mycontext;

       private String today;

       private static String CREATE_TABLE_USER = "create table Marks (ASid integer primary key autoincrement, Name text, Marks integer);";

      

public DBHelper(Context context) {

            

super(context, DATABASE_NAME, null, DATABASE_VERSION);

       DB_PATH = "/data/data/" + context.getPackageName() + "/databases/";

}

@Override

public void onCreate(SQLiteDatabase db) {

       //db.execSQL(CREATE_TABLE_USER);

}

public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {}

public static boolean isTableExist(SQLiteDatabase db)

{

Cursor cursor = db.rawQuery("select DISTINCT tbl_name from sqlite_master where tbl_name = '"+TABLE_USER+"'", null);

       if(cursor!=null)

{

if(cursor.getCount()>0)

             {

                  cursor.close();

                  return true;

             }

             cursor.close();

            

    }

return false;

}

            

            

private static boolean isDataBaseExist()

{           

       File file =new File(DB_PATH + DATABASE_NAME);       

       return file.exists();

}

public DBHelper opendb() throws SQLException

{

isDataBaseExist();

       if (isDataBaseExist() == false)

       {

              db=getWritableDatabase();

              if (db.isOpen())

                    db.close();

       }

      

db = getWritableDatabase();

       boolean tableExsist = isTableExist(db);

      

if(! tableExsist)

       {

              db.execSQL(CREATE_TABLE_USER);

       }

       return this;

       }

       public void closedb() {

              db.close();

       }

      

       public void AddRecords(String Name, Integer Marks)

       {

              Date d = new Date();

              SimpleDateFormat curFormater = new SimpleDateFormat("dd/MM/yyyy");

              String today = curFormater.format(d);

                   

              try

              {

                    ContentValues initialValues = new ContentValues();

                    db =  getWritableDatabase();    

                    initialValues.put("Name", Name);

                    initialValues.put("Marks", Marks);

                    db.insert(TABLE_USER, null, initialValues);

                    }

                    catch(Exception e)

                    {

                           e.printStackTrace();

                    }

             }

            

       public boolean CheckASList(String Name, Integer Marks)

             {

                    db = getReadableDatabase();

                    boolean flg = false;

                    try

                    {

                           Cursor cursor = db.query(TABLE_USER,

                            null, "Name" + " = '" + Name +"'"  +" AND " + "Marks" + " = '" + Marks+"'", null,null, null, null);

                          

                    int size = cursor.getCount();

                    if(size > 0)

                    {

                           flg = true;               

                    }

                    }

                    catch(Exception e)

                    {

                           e.printStackTrace();

                    }

                    return flg;

             }

      

       public ArrayList<ListBean> SelectStudentList(Integer Marks)

       {

             db = getReadableDatabase();

            

            

             ArrayList<ListBean> Beans= new ArrayList<ListBean>() ;

             boolean flg = false;

             try

             {

                    Cursor cursor = db.query(TABLE_USER,

                            null, "Narks" + " > '" + Marks +"'"  , null,

                            null, null, null);

                   

                    int size = cursor.getCount();

                    if(size > 0)

                    {     

                           cursor.moveToFirst();

                           for(int i=0; i<size; i++)

                           {

                                  flg = true;

                                  String Name = cursor.getString(0);

                                  String Marks= cursor.getString(1);

                                  ListBean ASbean = new ListBean() ;

                                  ASbean.setName(Name);

                                  ASbean.Marks(Marks);

                                

Beans.add(i, ASbean);

                                  cursor.moveToNext();

                           }     

                           cursor.close();

                    }

             }

             catch(Exception e)

             {

                    e.printStackTrace();

             }

             return Beans;

       }

      

       public int getCount()

       {

             db = getReadableDatabase();

             Cursor cursor = db.query(TABLE_USER,

                     null, null, null,

                     null, null, null);

             int size = cursor.getCount();

             return size;

       }

}

How to get JSON Object form url in android

String response = null;

DefaultHttpClient httpClient = new DefaultHttpClient();

ResponseHandler <String> resonseHandler = new BasicResponseHandler();

HttpPost postMethod = new HttpPost("your url");

try

{

JSONObject json = new JSONObject();

       json.put("Fiedl1”,value1);

       json.put("Fiedl2",value2);

                              

       postMethod.setEntity(new ByteArrayEntity(json.toString().getBytes("UTF8")));

       postMethod.setHeader( "Content-Type", "application/json" );

       response = httpClient.execute(postMethod,resonseHandler);

}

catch(Exception e)

{      e.printStackTrace();

}