Question

您好我正在使用app android注意到卡牌游戏的得分。我正在寻找如何保存实际比分和团队的能力。当应用程序被破坏或停止时命名，以便在我再次打开它时找到它们。

public class ShowScore extends AppCompatActivity {

SharedPreferences save = null;

private TextView nameTeam1= null;
private TextView nameTeam2= null;

private TextView scoreTeam1 = null;
private TextView scoreTeam2 = null;

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_show_score);

    nameTeam1= (TextView) findViewById(R.id.team1);
    nameTeam2= (TextView) findViewById(R.id.team2);
    scoreTeam1 = (TextView) findViewById(R.id.score1);
    scoreTeam2 = (TextView) findViewById(R.id.score2);

    nameTeam1.setText(save.getString("Team1","Team 1"));
    nameTeam2.setText(save.getString("Team2","Team 2"));
    scoreTeam1.setText(String.valueOf(save.getInt("Score1", 0)));
    scoreTeam2.setText(String.valueOf(save.getInt("Score2", 0)));
}

@Override
protected void onStop() {
    super.onStop();
    getDelegate().onStop();
    save = getApplicationContext().getSharedPreferences("MyPref", 0);
    SharedPreferences.Editor editor = save.edit();

    editor.putString("Team1", nameTeam1.getText().toString());
    editor.putString("Team2", nameTeam2.getText().toString());
    editor.putInt("Score1", Integer.parseInt(scoreTeam1.getText().toString()));
    editor.putInt("Score2", Integer.parseInt(scoreTeam2.getText().toString()));

    editor.commit();
    }
}

编辑我应该添加修复 save = getApplicationContext（）。getSharedPreferences（＆＃34; MyPref＆＃34;，0）; 进入onCreate（）。

Answer 1

最近我开始投资sqlite数据库，纯粹是因为它停留在系统上，并且可以进一步导出。但我遵循的一个很棒的教程是 http://www.androidhive.info/2011/11/android-sqlite-database-tutorial/
这具有用于数据库应用的所有C.R.U.D。

Answer 2

如果数据很小，您可以尝试多种选项，只需变量即可尝试共享首选项

SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", 0); // 0 - for private mode
Editor editor = pref.edit();

editor.putBoolean("key_name", true); // Storing boolean - true/false
editor.putString("key_name", "string value"); // Storing string

editor.commit(); // commit changes

就像这样，值将被存储然后你需要

来获取数据

pref.getString("key_name", null); // getting String

在Android APP上保存数据

2 个答案: