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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.


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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

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 : String s =editinfo.getText().toString(); long l=Long.parseLong(s); DBAdapter adapter=new DBAdapter(SQliteExample.this);; String returnedname=adapter.returnName(l); String returnednickname=adapter.returnickname(l); adapter.close(); editName.setText(returnedname); editNickName.setText(returnednickname);

How To Finish All Previous Activities in ANDROID ?

Some times we may need to close previous all activities before calling an intent, so that the previous activity do not loads on clicking the Android back button.Here is a simple sniffet for it.. Intent intent = new Intent(getApplicationContext(), MainClass.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent);