Skip to main content

Android is a multitasking operating system -- Explanation

Android is a true multitasking operating system . Android decides that it has sufficient resources it will maintain the app in a background state that can be brought quickly back to the foreground (for example, by clicking on the app's icon, or clicking the Back button---the curved back arrow---on the device). Many phones facilitate multitasking by making it easy to find the applications that have most recently been executing in the foreground.


Comments

Popular posts from this blog

Passing Images between Activities in Android

in First Activity:
Intent intent=new Intent(FirstClass.this, SecondClass.class); Bundle bundle=new Bundle(); bundle.putInt("image",R.drawable.ic_launcher); intent.putExtras(bundle); startActivity(intent); in Second Acticity:
Bundle bundle=this.getIntent().getExtras(); int pic=bundle.getInt("image"); v.setImageResource(pic);another method:
in First Activity:
Drawable drawable=imgv.getDrawable(); Bitmap bitmap= ((BitmapDrawable)drawable).getBitmap(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos); byte[] b = baos.toByteArray(); Intent intent=new Intent(Passimage.this,myclass.class); intent.putExtra("picture", b); startActivity(intent); in Second Acticity:
Bundle extras = getIntent().getExtras(); byte[] b = extras.getByteArray("picture"); Bitmap bmp = BitmapFactory.decodeByteArray(b, 0, b.length); Image…

Get a single record from SQLite in ANDROID

For COMPLETE TUTORIALS see here :
in DATABASE HELPER class: String[] coloumns = new String[] { KEY_ROWID, KEY_NAME, KEY_NICKNAME }; // calling elements in an array Cursor c = db.query(DATABASE_TABLE, coloumns, KEY_ROWID + "=" + l,null, null, null, null); if (c != null) { c.moveToFirst(); String name = c.getString(1); // since name is in position 1 ie second coloumn return name; } return null; in sqlite.java : String s =editinfo.getText().toString(); long l=Long.parseLong(s); DBAdapter adapter=new DBAdapter(SQliteExample.this); adapter.open(); String returnedname=adapter.returnName(l); String returnednickname=adapter.returnickname(l); adapter.close(); editName.setText(returnedname); editNickName.setText(returnednickname);

TextView Animation or Alpha animation (FadeIn , FadeOut) in ANDROID

An Alpha Animation is animation that controls the alpha level of an object, i.e. fading it in and out. In Android, you can apply that fading effect to almost anything, from simple text, to images, buttons, check boxes, etc…

This can be done both from xml and from java class.

Here I will explain a simple way to give a FadeIn and FadeOut for a textview on button click.. public class Textviewanimation extends Activity { Animation fadeIn,fadeOut; TextView tv; Button startanimation; Boolean fadeflag=true; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_textviewanimation); tv=(TextView) findViewById(R.id.textview); startanimation=(Button) findViewById(R.id.button1); fadeIn = new AlphaAnimation(0.0f , 1.0f ) ; fadeIn.setDuration(1200); fadeIn.setFillAfter(true); fadeOut = new AlphaAnimation(1.0f , 0.0f); fadeOut.setDurati…