public void checkFirstRun() {
    boolean isFirstRun = getSharedPreferences("PREFERENCE", MODE_PRIVATE).getBoolean("isFirstRun", true);
    if (isFirstRun){

        new AlertDialog.Builder(this)
                .setTitle("Agreement")
                .setMessage("Text")
                .setPositiveButton("Agree",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                getSharedPreferences("PREFERENCE", MODE_PRIVATE)
                                        .edit()
                                        .putBoolean("isFirstRun", false)
                                        .apply();
                            }
                        })
                .setNegativeButton("Cencel",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                dialog.dismiss();
                                finish();
                            }
                        })
                .show();

    }
}