how to open android application if installed and go to android market if not install

Question

I would like to make android button and able to launch other application if already installed and go to android market if not yet installed.

How to do this?

Answer 1

Try with this -

Just create one Button in your layout. And, onClick of that button check below condition -

Button calculateButton = (Button) findViewById(R.id.buttonCalculate);
    calculateButton.setOnClickListener(new View.OnClickListener() {

          public void onClick(View v) 
          {
              if(check() == true)
              {
                  PackageManager pack = this.getPackageManager();
                  Intent app = pack.getLaunchIntentForPackage(packagename);
                  startActivity(app);
              }else
              {
                  Intent marketIntent = new Intent(Intent.ACTION_VIEW);
                  marketIntent.setData(Uri.parse("market://details?id=packagename"));
                  startActivity(marketIntent);
              }
         }
    });
}

public boolean check()
{
    try{
        ApplicationInfo info = getPackageManager().getApplicationInfo("packagename", 0 );
        return true;
    } catch( PackageManager.NameNotFoundException e ){
        return false;
    }
}