Skip to main content

How to Open Calculator In ANDROID

If we want to open the inbuilt calculator of ANDROID ,here is the sniffet...
public class CalculatorActivity extends Activity {
    public static final String CALCULATOR_PACKAGE ="";
    public static final String CALCULATOR_CLASS ="";
    public void onCreate(Bundle savedInstanceState) {
        Intent calculatorintent = new Intent();
        calculatorintent.setComponent(new ComponentName(CALCULATOR_PACKAGE,CALCULATOR_CLASS));

    } }
The above may not work with every devices, so you may need this one..
 ArrayList<HashMap<String,Object>> items =new ArrayList<HashMap<String,Object>>();
        PackageManager pm;
        final PackageManager p = getPackageManager();
        List<PackageInfo> packs = p.getInstalledPackages(0);  
        for (PackageInfo pi : packs) {
        if( pi.packageName.toString().toLowerCase().contains("calcul")){
            HashMap<String, Object> map = new HashMap<String, Object>();
            map.put("appName", pi.applicationInfo.loadLabel(p));
            map.put("packageName", pi.packageName);
         String packageName = (String) items.get(0).get("packageName");
         Intent i = p.getLaunchIntentForPackage(packageName);
         if (i != null)
               // Application not found


Post a Comment

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

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);

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(; startanimation=(Button) findViewById(; fadeIn = new AlphaAnimation(0.0f , 1.0f ) ; fadeIn.setDuration(1200); fadeIn.setFillAfter(true); fadeOut = new AlphaAnimation(1.0f , 0.0f); fadeOut.setDurati…