APP_Activity_Redirection

[RedirectEnter]
 

           Intent intent = new Intent(RedirectEnter.this, RedirectMain.class);
           startActivity(intent);

[RedirectMain.java]

    static final int INIT_TEXT_REQUEST = 0;
    static final int NEW_TEXT_REQUEST = 1;

  @Override
 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.redirect_main);

          if (!loadPrefs()) {
            Intent intent = new Intent(this, RedirectGetter.class);
            startActivityForResult(intent, INIT_TEXT_REQUEST);
}

 @Override
 protected void onActivityResult(int requestCode, int resultCode,
  Intent data) {
        if (requestCode == INIT_TEXT_REQUEST) {

            if (resultCode == RESULT_CANCELED) {
                finish();

            } else {
                loadPrefs();
            }

        } else if (requestCode == NEW_TEXT_REQUEST) {

            if (resultCode != RESULT_CANCELED) {
                loadPrefs();
            }

        }
    }

  private final boolean loadPrefs() {
  SharedPreferences preferences = getSharedPreferences("RedirectData", 0);

        mTextPref = preferences.getString("text", null);
        if (mTextPref != null) {
            TextView text = (TextView)findViewById(R.id.text);
            text.setText(mTextPref);
            return true;
        }

        return false;
    }

    private OnClickListener mClearListener = new OnClickListener() {
        public void onClick(View v) {
   
SharedPreferences preferences = getSharedPreferences("RedirectData", 0);
            preferences.edit().remove("text").commit();
            finish();
        }
    };

    private OnClickListener mNewListener = new OnClickListener() {
        public void onClick(View v) {
         
            Intent intent = new Intent(RedirectMain.this, RedirectGetter.class);
         startActivityForResult(intent, NEW_TEXT_REQUEST);
        }
    };

    private String mTextPref;
}

[RedirectGetter.java]

 private final boolean loadPrefs()
    {

   SharedPreferences preferences = getSharedPreferences("RedirectData", 0);

        mTextPref = preferences.getString("text", null);
        if (mTextPref != null) {
            mText.setText(mTextPref);
            return true;
        }

        return false;
    }

    private OnClickListener mApplyListener = new OnClickListener()
    {
        public void onClick(View v)
        {
   SharedPreferences preferences = getSharedPreferences("RedirectData", 0);
  SharedPreferences.Editor editor = preferences.edit();
  editor.putString("text", mText.getText().toString());

            if (editor.commit()) {
                setResult(RESULT_OK);
            }

            finish();
        }
    };

// "RedirectData"는 String name, "text"는 String key

** RedirectEnter.java에서 RedirectMain.java를 호출하고 RedirectMain은 prefrences의 내용 유무에 따라서 sub activity를 실행하여 그 데이터를 저장하고 출력한다. **