Question

我有一个TableView 60 TextView，用户可以通过另一个Dialog Activity触摸并输入其中的数据。 DialogActivity设置了所触摸的TextView的文字和颜色。问题是当我触摸另一个TextView时，我失去了之前触及的TextView。我是否可以逐步使用SharedPreference存储所有被触及的TextView？例如，如果我将TextView设置在位置1：1（行：columm）并且我想设置TextView 2：2，我如何逐步保存所有TextView以及don ＃39;丢失了他们输入的数据？

调用DialogActivity的Activity的一些java

public class ActivitySetOrario extends ActionBarActivity {

//Static perch� cosi non perdo i dati inseriti in precedenza!
static DataBase DB = new DataBase();
static int clickedTextViewId; // Declare TextView as class level member field


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_set_orario);

}//Fine oncreate

//Prende indietro la materia aggiunta dall'ActivityAddMateria
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == 1) {
        if (resultCode == RESULT_OK) {

            String result = data.getStringExtra("result"); //Take the materia from Dialog
            int color = data.getIntExtra("color", 1); //Take the color from Dialog

            Materia materia;
            materia = new Materia();
            materia.setMateria(result); //put the name materia into class materia
            materia.setColor(color); //put the color materia into class materia
            DB.getMaterie().add(materia);
            // Now use mTextView  here
            //View view = findViewById(clickedTextViewId);
            TextView clickedtextView = (TextView) findViewById(clickedTextViewId); //(TextView) view;
            if(clickedTextViewId == clickedtextView.getId()) {
                clickedtextView.setText(result);
                clickedtextView.setBackgroundColor(color);
            }
        }

        if (resultCode == RESULT_CANCELED) {
            //Nessuna materia inserita
        }
    }
}//onActivityResult

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.activity_set_orario, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.

    switch (item.getItemId()) {
    case R.id.draw_orario:
        //addMateria();
        return true;
    case R.id.save_data_orario:
        //SERIALIZZO I DATI CHE DOVRA PRENDERE ActivityOrario
        backToOrario();
        return true;     
    case R.id.exit_orario:
        //Torno alla schermata orario annullo ogni modifica NON SERIALIZZO
        backToOrario();
        finish();
        return true;     
    case R.id.action_settings:
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }
}

//Torna alla ActivityOrario
public void backToOrario(){
    Intent myIntent = new Intent(ActivitySetOrario.this, ActivityOrario.class);
    startActivity(myIntent);
}

public void addMateria(View v){
    //To get ID of your TextView do this
    clickedTextViewId = v.getId();
    //StartActivityForResult perche mi aspetto la materia inserita dall'altra activity
    Intent myIntent = new Intent(ActivitySetOrario.this, ActivityAddMateria.class);
    ActivitySetOrario.this.startActivityForResult(myIntent, 1);
}
}

DialogActivty代码

public class ActivityAddMateria extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add_materia);

    final Button exit_button = (Button) findViewById(R.id.exit_dialog_materia);
    exit_button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            //No input
            Intent returnIntent = new Intent();
            setResult(RESULT_CANCELED, returnIntent);
            //Exit from Dialog
            finish();
        }
    });

    final Button accept_button = (Button) findViewById(R.id.add_materia);
    accept_button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            //Find EditText for take data
            EditText nome_materia = (EditText)findViewById(R.id.nome_materia);
            //Put result into variable result that is send back
            String result = nome_materia.getText().toString();
            int color = getResources().getColor(R.color.rosso);
            Intent returnIntent = new Intent();
            returnIntent.putExtra("result",result).putExtra("color",color);
            setResult(RESULT_OK,returnIntent);
            // Exit to Dialog
            finish();
        }
    });

}
}

这是一个很好的共享偏好还是更好的另一种方式？

Answer 1

SharedPreferences适用于少量数据，否则您需要查看sqllite以获取大量数据。

对于您的问题，请看一下这篇文章：How to use SharedPreferences in Android to store, fetch and edit values

如何使用SharedPreferences保存TextView值？

1 个答案: