import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;

public class UpdateApp extends Activity implements CallBackUpdateApp {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        String url = getIntent().getExtras().getString("url");
        if (url != null) {
            UpdateAsyncTask task = new UpdateAsyncTask(UpdateApp.this, this,
                    url);
            task.execute();
        }
    }

    @Override
    public void processResponse() {
        File SDCardRoot = Environment.getExternalStorageDirectory();
        File file = new File(SDCardRoot, "File.apk");
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.fromFile(file),
                "application/vnd.android.package-archive");
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);
        finish();
    }
}

interface CallBackUpdateApp {
    /**
     * Used getting response from async task and sending back to parent activity
     *
     * @param response
     *            : response received by webService
     */
    public void processResponse();
}