Coderzworld

Ever wonder how to drag and drop in android. Lets check how to drag and drop image in android. MainActivity.java package com.example.dragdrop; import android.app.Activity; import android.content.ClipData; import android.content.ClipDescription; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Matrix; import android.os.Bundle; import android.util.Log; import android.view.DragEvent; import android.view.MotionEvent; import android.view.View; import android.view.View.DragShadowBuilder; import android.view.View.OnClickListener; import android.view.View.OnDragListener; import android.view.View.OnTouchListener; import android.widget.ImageView; import android.widget.SeekBar; import android.widget.ImageView.ScaleType; import android.widget.RelativeLayout; import android.widget.SeekBar.OnSeekBarChangeListener; public class MainActivity extends Activity { ImageView img_model, img_chain; private static final String IMAGEVI

 We can call fragment as a sub activity. By using fragment navigation will more easier and in tabs layouts look cool.Let us see an example..... Here we have 2 fragment class Details, and Detail2. MainActivity.java import android.app.Activity; import android.app.Fragment; import android.app.FragmentTransaction; import android.os.Bundle; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //Here we call the first fragment Fragment fragment = null; fragment = new Options(); FragmentTransaction fragmentTransaction = getFragmentManager() .beginTransaction(); fragmentTransaction.replace(R.id.frame1, fragment).commit(); } } Options.java import android.app.Fragment; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View

I always wonder the use of a flash light on a phone. This simple app is more useful than anything. So here is the code to build a flashlight app, MainActivity.java import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.pm.PackageManager; import android.hardware.Camera; import android.hardware.Camera.Parameters; import android.media.MediaPlayer; import android.media.MediaPlayer.OnCompletionListener; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.ImageButton; public class MainActivity extends Activity { ImageButton btnSwitch; private Camera camera; private boolean isFlashOn; private boolean hasFlash; Parameters params; MediaPlayer mp; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // flash switch button

We can easily save the contacts to the phone contacts without having any database of own . The code is very simple. import android.app.Activity; import android.app.AlertDialog; import android.content.ComponentName; import android.content.ContentValues; import android.content.DialogInterface; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.provider.Contacts; import android.provider.Contacts.People; import android.provider.ContactsContract; import android.provider.ContactsContract.CommonDataKinds.Phone; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; public class MainActivity extends Activity { protected static final int PICK_CONTACT = 0; EditText edt1,edt2; Button btn; String s1,s2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activ