Android Programming: 2014

Friday, August 15, 2014

Android Program take notes(Add & List only)

Android Program take notes(Add & List only)

ListNotes Activity

package com.ramki.takenotes;

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;

public class ListNotes extends Activity implements OnClickListener {
Button bAdd, bDelete, bUpdate;
EditText etNotes;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.listnotes);
TextView tv = (TextView) findViewById(R.id.list);
etNotes = (EditText) findViewById(R.id.etnotes);

bAdd = (Button) findViewById(R.id.badd);
bAdd.setOnClickListener(this);

DBAdapter ListRec = new DBAdapter(this);
ListRec.open();
String getInfo = ListRec.getInfo();

ListRec.close();

tv.setText(getInfo);

}

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.badd:

String notes2 = etNotes.getText().toString();
DBAdapter WriteDB = new DBAdapter(ListNotes.this);
WriteDB.open();

WriteDB.writeInfo(notes2);
WriteDB.close();

break;

}
}

}

DBAdapter

package com.ramki.takenotes;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DBAdapter {

public static final String ROWID = "rowid";
public static final String FIELDNOTES = "notes";

private static final String DBNAME = "takenotes1.db";
private static final String DBTABLE = "takenotes";
private static final int DBVERSION = 1;

private final Context ourContext;
private SQLiteDatabase ourDB;
private DBHelper ourHelper;

private class DBHelper extends SQLiteOpenHelper{

public DBHelper(Context context) {
// TODO Auto-generated constructor stub
super(context, DBNAME, null, DBVERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub

db.execSQL("CREATE TABLE " + DBTABLE + " (" +
ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
FIELDNOTES + " TEXT NOT NULL);"
);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF NOT EXIST " + DBTABLE);
onCreate(db);

}
}

public DBAdapter(Context c)
{
ourContext = c;

}

public DBAdapter open() throws SQLException
{
ourHelper = new DBHelper(ourContext);
ourDB = ourHelper.getWritableDatabase();
return this;
}

public void close(){
ourHelper.close();
}

//INSERT THE RECORDS INTO TABLE
public long writeInfo(String notes2)
{
// TODO Auto-generated method stub
ContentValues cv = new ContentValues();
cv.put(FIELDNOTES, notes2);
return ourDB.insert(DBTABLE, null, cv);

}

//LIST THE RECORDS FROM TABLE
public String getInfo() {
// TODO Auto-generated method stub
String[] columns = new String[]{ROWID, FIELDNOTES};
Cursor c = ourDB.query(DBTABLE, columns, null,null, null, null,null);
String results = "";
int iRow = c.getColumnIndex(ROWID);
int iNotes = c.getColumnIndex(FIELDNOTES);

for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){
results = results + c.getString(iRow) + " " +c.getString(iNotes) + "\n";
}

return results;
}

}

XML Layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >

<EditText
android:id="@+id/etnotes"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:text="Enter the Notes" >

<requestFocus />
</EditText>

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<Button
android:id="@+id/badd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add" />

<Button
android:id="@+id/bdelete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Delete" />

<Button
android:id="@+id/bupdate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Update" />
</LinearLayout>

<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >

<TableRow>

<TextView
android:id="@+id/notes"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="List Notes from DB"
android:textAppearance="?android:attr/textAppearanceMedium" />
</TableRow>
</TableLayout>

<TextView
android:id="@+id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Record not found"
android:textAppearance="?android:attr/textAppearanceMedium" />

</LinearLayout>

Saturday, August 9, 2014

Task Manager App using SQLiteDatabase

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Task Details" />

<EditText
android:id="@+id/task"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Enter the Task" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Due Date"
android:inputType="date"/>

<EditText
android:id="@+id/duedate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Enter the Date"/>


<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<Button
android:id="@+id/add"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add" />

<Button
android:id="@+id/view"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="View" />

</LinearLayout>

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Enter the Row ID" />

<EditText
android:id="@+id/etrowid"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Enter the Row ID"
android:inputType="number"/>

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<Button
android:id="@+id/getinfo"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Get Info" />

<Button
android:id="@+id/update"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Modify" />

<Button
android:id="@+id/delete"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Delete" />
</LinearLayout>

</LinearLayout>

----------------------------------------------------------------------------------------------------------
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >

<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >

<TableRow>

<TextView
android:id="@+id/task"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Task"
android:ems="10" >
</TextView>
<TextView
android:id="@+id/date1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Date"
android:ems="10" >

</TextView>

</TableRow>

</TableLayout>
<TextView
android:id="@+id/getinfo"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="get the stored info."
android:ems="10" >

</TextView>
</LinearLayout>

----------------------------------------------------------------------------------------------------------
package com.ramki.taskmanager;

import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
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 AddTask extends Activity implements OnClickListener {

Button bAdd, bView, bgetInfo, bUpdate, bDelete;
EditText etTask, etDate, etRowid;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.addtask);

bAdd = (Button) findViewById(R.id.add);
bView = (Button) findViewById(R.id.view);

etTask = (EditText) findViewById(R.id.task);
etDate = (EditText) findViewById(R.id.duedate);

bgetInfo = (Button) findViewById(R.id.getinfo);
bUpdate = (Button) findViewById(R.id.update);
bDelete = (Button) findViewById(R.id.delete);

etRowid = (EditText) findViewById(R.id.etrowid);

bAdd.setOnClickListener(this);
bView.setOnClickListener(this);

bgetInfo.setOnClickListener(this);
bUpdate.setOnClickListener(this);
bDelete.setOnClickListener(this);
}

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.add:

boolean didItWork = true;

try {

String task = etTask.getText().toString();
String duedate = etDate.getText().toString();

DBAdapter entry = new DBAdapter(AddTask.this);

entry.open();
entry.createTask(task, duedate);
entry.close();
} catch (Exception e) {
didItWork = false;
String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("Error Message");
TextView tv = new TextView(this);
tv.setText(error);
d.setContentView(tv);
d.show();

} finally {
if (didItWork) {
Dialog d = new Dialog(this);
d.setTitle("Message");
TextView tv = new TextView(this);
tv.setText("Successfully Updated");
// tv.setTextAlignment(ALIGN_CENTER);
d.setContentView(tv);
d.show();
}
}

break;
case R.id.view:
Intent intent = new Intent("com.ramki.taskmanager.LISTTASK");
startActivity(intent);
break;

case R.id.getinfo:
try {

String s = etRowid.getText().toString();
long l = Long.parseLong(s);
DBAdapter db = new DBAdapter(this);
db.open();

// db.getInfo();
String getTask = db.getTask(l);
String getDate = db.getDate(l);

db.close();

etTask.setText(getTask);
etDate.setText(getDate);
} catch (Exception e) {

String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("Error Message");
TextView tv = new TextView(this);
tv.setText(error);
d.setContentView(tv);
d.show();

}
break;

case R.id.update:
try {
String uRow = etRowid.getText().toString();
long lRow = Long.parseLong(uRow);

String utask = etTask.getText().toString();
String uduedate = etDate.getText().toString();

DBAdapter dUpdate = new DBAdapter(this);
dUpdate.open();

dUpdate.UpdateEntry(lRow, utask, uduedate);
//

dUpdate.close();

} catch (Exception e) {

String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("Error Message");
TextView tv = new TextView(this);
tv.setText(error);
d.setContentView(tv);
d.show();

}

break;

case R.id.delete:
try {
String uRow1 = etRowid.getText().toString();
long lRow1 = Long.parseLong(uRow1);

DBAdapter dDelete = new DBAdapter(this);
dDelete.open();

dDelete.DeleteRow(lRow1);

dDelete.close();
} catch (Exception e) {

String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("Error Message");
TextView tv = new TextView(this);
tv.setText(error);
d.setContentView(tv);
d.show();

}
break;

}
}

}

----------------------------------------------------------------------------------------------------------
package com.ramki.taskmanager;

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

public class ListTask extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.listtask);
TextView tv = (TextView) findViewById(R.id.getinfo);
DBAdapter getInfo = new DBAdapter(this);

getInfo.open();

String getData = getInfo.getData();

getInfo.close();
tv.setText(getData);

}

}

----------------------------------------------------------------------------------------------------------
package com.ramki.taskmanager;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DBAdapter {

public static final String ROWID = "rowid";
public static final String TASK = "task";
public static final String DUEDATE = "duedate";

private static final String DBNAME = "taskmanager";
private static final String DBTABLE = "task";
private static final int DBVERSION = 1;

private DBHelper ourHelper;
private SQLiteDatabase ourDB;
private final Context ourContext;

private class DBHelper extends SQLiteOpenHelper{

public DBHelper(Context context) {
super(context, DBNAME, null, DBVERSION);
// TODO Auto-generated constructor stub
}

@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE " + DBTABLE + " (" +

ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
TASK + " TEXT NOT NULL, " +
DUEDATE + " TEXT NOT NULL);"
);
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF NOT EXIST " + DBTABLE);
onCreate(db);
}

}

public DBAdapter(Context c){
ourContext = c;

}

public DBAdapter open() throws SQLException{
ourHelper = new DBHelper(ourContext);
ourDB = ourHelper.getWritableDatabase();
return this;
}

public void close(){
ourHelper.close();
}

public long createTask(String task2, String duedate2) {
// TODO Auto-generated method stub
ContentValues cv = new ContentValues();
cv.put(TASK, task2);
cv.put(DUEDATE, duedate2);
//ourDB.insert(DBTABLE, null, cv);
return ourDB.insert(DBTABLE, null, cv);

}

public String getData() {
// TODO Auto-generated method stub
String[] columns = new String[]{ROWID, TASK, DUEDATE};
Cursor c = ourDB.query(DBTABLE, columns, null, null, null, null, null);
String result = "";

int iRow = c.getColumnIndex(ROWID);
int iTask = c.getColumnIndex(TASK);
int iDueDate = c.getColumnIndex(DUEDATE);

for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){
result = result + c.getString(iRow) + " " + c.getString(iTask) + " " + c.getString(iDueDate) + "\n";
}

return result;
}

public String getTask(long l) throws SQLException{
// TODO Auto-generated method stub
String[] columns = new String[]{ROWID, TASK, DUEDATE};
Cursor c = ourDB.query(DBTABLE, columns, ROWID + "=" + l, null, null, null, null);
if (c != null){
c.moveToFirst();
String task = c.getString(1);
return task;
}
return null;
}

public String getDate(long l) throws SQLException{
// TODO Auto-generated method stub
String[] columns = new String[]{ROWID, TASK, DUEDATE};
Cursor c = ourDB.query(DBTABLE, columns, ROWID + "=" + l, null, null, null, null);
if (c != null){
c.moveToFirst();
String date = c.getString(2);
return date;
}
return null;
}

public void UpdateEntry(long lRow, String utask, String uduedate) throws SQLException{
// TODO Auto-generated method stub
ContentValues cvUpdate = new ContentValues();
cvUpdate.put(TASK, utask);
cvUpdate.put(DUEDATE, uduedate);
//ourDB.insert(DBTABLE, null, cv);
ourDB.update(DBTABLE, cvUpdate, ROWID + "=" + lRow, null);
}

public void DeleteRow(long lRow1) throws SQLException{
// TODO Auto-generated method stub
ourDB.delete(DBTABLE, ROWID + "=" + lRow1, null);

}

/*private DBHelper ourHelper;
private SQLiteDatabase ourDB;
private final Context ourContext;

private static class DBHelper extends SQLiteOpenHelper{

public DBHelper(Context context) {
super(context, DBNAME, null, DBVERSION);
// TODO Auto-generated constructor stub
}

@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub

}

}

public DBAdapter(Context c){
ourContext = c;

}

public DBAdapter open(){
ourHelper = new DBHelper(ourContext);
ourDB = ourHelper.getWritableDatabase();
return this;
}
*/

}

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

Friday, August 1, 2014

SIGNUP

SIGNUP

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.Toast;

public class SignUp extends Activity{

EditText usrname, password, confirmpassword;
Button createbutton;

DBAdapter dbAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.signup);

dbAdapter = new DBAdapter(this);
dbAdapter = dbAdapter.open();

usrname = (EditText) findViewById(R.id.sname);
password = (EditText) findViewById(R.id.spwd);
confirmpassword = (EditText) findViewById(R.id.spwd2);

createbutton = (Button) findViewById(R.id.sconfirm);

createbutton.setOnClickListener(new OnClickListener() {

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

String usrname1 = usrname.getText().toString();
String password1 = password.getText().toString();

String confirmpass1 = confirmpassword.getText().toString();

dbAdapter.insertRecord(usrname1, password1);
Toast.makeText(getApplicationContext(), "Accont Succesfully Created ", Toast.LENGTH_LONG).show();

}
});

}

@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
dbAdapter.close();
}

}

LOGINPAGE

import android.app.Activity;

import android.content.Intent;

import android.database.sqlite.SQLiteDatabase;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class LoginPage extends Activity

{

Button bsignin, bsignup;

EditText userid, pwd;

DBAdapter dbadapter;

public SQLiteDatabase db;

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.login);

userid = (EditText) findViewById(R.id.userid);

pwd = (EditText) findViewById(R.id.pwd);

bsignin = (Button) findViewById(R.id.signin);

bsignup = (Button) findViewById(R.id.signup);

bsignup.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

Toast.makeText(getApplicationContext(), "Signup clicked", Toast.LENGTH_LONG).show();

Intent signupint = new Intent(getApplicationContext(), SignUp.class);

startActivity(signupint);

}

});

bsignin.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

String getuserid = userid.getText().toString();

String getpwd = pwd.getText().toString();

String storedPwd = dbadapter.getSingleEntry(getuserid);

if(getpwd.equals(storedPwd))

{

Toast.makeText(getApplicationContext(), "Login Successfull", Toast.LENGTH_LONG).show();

}

else

{

Toast.makeText(getApplicationContext(), "Login Fail", Toast.LENGTH_LONG).show();

}

Toast.makeText(getApplicationContext(), "Signin clicked" + (getuserid + getpwd) , Toast.LENGTH_LONG).show();

}

});

}

DBAdapter

DBAdapter

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class DBAdapter {
public static final String DBNAME = "ramkidb";
public static final String DBTABLE = "usrmstp";
public static final int DBVERSION = 1;

public static final String ROWID ="id";
public static final String NAME1 = "name1";
public static final String PASSWORD = "password";
//public static final String CONTENT = "Content";
private static final String TAG = "DBAdapter1";

private static final String DBCREATE = "create table " + DBNAME +
" (" +ROWID + "integer primary key autoincrement, " + NAME1 + "text not null"
+ PASSWORD + "text not null);";

/*"create table if not exist usrmstp (id integer primary key autoincrement,"
+ "name1 VARCHAR not null, password VARCHAR);";
*/

private SQLiteHelper DBHelper;

private SQLiteDatabase db;

private Context context;

public class SQLiteHelper extends SQLiteOpenHelper
{
public SQLiteHelper(Context context, String name,CursorFactory factory, int version)
{
super(context,DBNAME,null,DBVERSION);
}

@Override
public void onCreate(SQLiteDatabase db1)
{
try{
db1.execSQL(DBCREATE);
} catch (SQLException e){
e.printStackTrace();
}
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");

db.execSQL("DROP TABLE IF EXISTS "+ DBTABLE);
onCreate(db);
}

}

public DBAdapter(Context ctx)
{
context = ctx;
DBHelper = new SQLiteHelper(context, DBNAME, null, DBVERSION);

}

public DBAdapter openToRead() throws SQLException
{
// DBHelper = new SQLiteHelper(context);
DBHelper = new SQLiteHelper(context, DBNAME, null, DBVERSION);
db = DBHelper.getReadableDatabase();
return this;
}

public DBAdapter openToWrite() throws android.database.SQLException {
// DBHelper = new SQLiteHelper(context);
DBHelper = new SQLiteHelper(context, DBNAME, null, DBVERSION);
db = DBHelper.getWritableDatabase();
return this;
}

//close the database
public void close()
{
DBHelper.close();
}

public long insertRecord(String name1, String password)
{
ContentValues intialValues = new ContentValues();
intialValues.put(NAME1, name1);
intialValues.put(PASSWORD, password);
return db.insert(DBTABLE, null, intialValues);
}

public String getSingleEntry(String name1)
{
Cursor cursor = db.query("RAMKIDB",null, " NAME1=?", new String[] {name1}, null, null, null);

if(cursor.getCount() < 1)
{
cursor.close();
return "NOT EXIST";
}

cursor.moveToFirst();
String password = cursor.getString(cursor.getColumnIndex("PASSWORD"));
cursor.close();
return password;

}

public boolean deleteRecord(long rowId)
{
return db.delete(DBTABLE, ROWID + "=" + rowId, null) > 0;
}

public int deleteAll() {
return db.delete(DBTABLE, null, null);
}

public Cursor getAllRecords()
{
return db.query(DBTABLE, new String[] {ROWID,NAME1,PASSWORD},null,null,null, null, null);
}

public Cursor getRecord(long rowid) throws SQLException
{
Cursor mCursor = db.query(true,DBTABLE,new String[] {ROWID,NAME1,PASSWORD}, ROWID

+ "=" , null, null, null, null, null);
if (mCursor != null)
{
mCursor.moveToFirst();
}
return mCursor;
}

public boolean updateRecord(long rowId, String name1, String password)
{
ContentValues args = new ContentValues();
args.put(NAME1, name1);
args.put(PASSWORD, password);
return db.update(DBTABLE, args, ROWID + "=" + rowId, null) > 0;
}

public DBAdapter open() throws SQLException
{
db = DBHelper.getWritableDatabase();
//db = DBHelper.getWritableDatabase();
return this;
}

}

Monday, July 21, 2014

Zoom Image Demo In Android

(Below sources are copied from web randomly)

(Note its not created by me...)

Zoom Image Demo In Android | Zoom Image Example with code in Android | MotionEvent, Matrix example in Android

Hello friends!
Today I am going to share zoom image code in Android using TouchListner, MotionEvent, Matrix.
Please copy paste below code and enjoy!

1-Print Screen

2-MainActivity

package com.manish.zoomimage;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Matrix;
import android.graphics.PointF;
import android.os.Bundle;
import android.util.FloatMath;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends Activity {
 ImageView imageDetail;
 Matrix matrix = new Matrix();
 Matrix savedMatrix = new Matrix();
 PointF startPoint = new PointF();
 PointF midPoint = new PointF();
 float oldDist = 1f;
 static final int NONE = 0;
 static final int DRAG = 1;
 static final int ZOOM = 2;
 int mode = NONE;

 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  imageDetail = (ImageView) findViewById(R.id.imageView1);
  /**
   * set on touch listner on image
   */
  imageDetail.setOnTouchListener(new View.OnTouchListener() {

   @Override
   public boolean onTouch(View v, MotionEvent event) {

    ImageView view = (ImageView) v;
    System.out.println("matrix=" + savedMatrix.toString());
    switch (event.getAction() & MotionEvent.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN:

     savedMatrix.set(matrix);
     startPoint.set(event.getX(), event.getY());
     mode = DRAG;
     break;

    case MotionEvent.ACTION_POINTER_DOWN:

     oldDist = spacing(event);

     if (oldDist > 10f) {
      savedMatrix.set(matrix);
      midPoint(midPoint, event);
      mode = ZOOM;
     }
     break;

    case MotionEvent.ACTION_UP:

    case MotionEvent.ACTION_POINTER_UP:
     mode = NONE;

     break;

    case MotionEvent.ACTION_MOVE:
     if (mode == DRAG) {
      matrix.set(savedMatrix);
      matrix.postTranslate(event.getX() - startPoint.x,
        event.getY() - startPoint.y);
     } else if (mode == ZOOM) {
      float newDist = spacing(event);
      if (newDist > 10f) {
       matrix.set(savedMatrix);
       float scale = newDist / oldDist;
       matrix.postScale(scale, scale, midPoint.x, midPoint.y);
      }
     }
     break;

    }
    view.setImageMatrix(matrix);

    return true;
   }

   @SuppressLint("FloatMath")
   private float spacing(MotionEvent event) {
    float x = event.getX(0) - event.getX(1);
    float y = event.getY(0) - event.getY(1);
    return FloatMath.sqrt(x * x + y * y);
   }

   private void midPoint(PointF point, MotionEvent event) {
    float x = event.getX(0) + event.getX(1);
    float y = event.getY(0) + event.getY(1);
    point.set(x / 2, y / 2);
   }
  });

 }

}

3-activity_main

<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" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scaleType="matrix"
        android:src="@drawable/images" />

</RelativeLayout>