在 Android Studio 中保存 CheckBox

Question

我是一名 Java 初学者，我无法保存复选框的状态，我需要创建一个列表，这些选项将保存在应用程序本身的本地。

该代码仅适用于 1 个复选框，当我尝试添加另一个复选框时，第二个不起作用，它保存与第一个相同的数据。

public class MainActivity extends AppCompatActivity {

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

    final CheckBox checkBox = (CheckBox) findViewById(R.id.checkBox);
    final CheckBox checkBox2 = (CheckBox) findViewById(R.id.checkBox2);

    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
    final SharedPreferences.Editor editor = preferences.edit();
    if (preferences.contains("checked") && preferences.getBoolean("checked", false) == true) {
        checkBox.setChecked(true);
    } else {
        checkBox.setChecked(false);

    }
    checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if (checkBox.isChecked()) {
                editor.putBoolean("checked", true);
                editor.apply();
            } else {
                editor.putBoolean("checked", false);
                editor.apply();
            }
        }
    });

    SharedPreferences preferences2 = PreferenceManager.getDefaultSharedPreferences(this);
    final SharedPreferences.Editor editor2 = preferences2.edit();
    if (preferences2.contains("checked") && preferences2.getBoolean("checked", false) == true) {
        checkBox2.setChecked(true);
    } else {
        checkBox2.setChecked(false);

    }
    checkBox2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if (checkBox2.isChecked()) {
                editor2.putBoolean("checked", true);
                editor2.apply();
            } else {
                editor2.putBoolean("checked", false);
                editor2.apply();
            }
        }
    });
}

Answer 1

它保持相同的状态，因为您对两个复选框使用相同的共享首选项。 您也只能使用一个编辑器

public class MainActivity extends AppCompatActivity {

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

final CheckBox checkBox = (CheckBox) findViewById(R.id.checkBox);
final CheckBox checkBox2 = (CheckBox) findViewById(R.id.checkBox2);

SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
final SharedPreferences.Editor editor = preferences.edit();
if (preferences.getBoolean("checkbox1", false) == true) {
    checkBox.setChecked(true);
} else {
    checkBox.setChecked(false);

}
checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
        if (checkBox.isChecked()) {
            editor.putBoolean("checkbox1", true);
            editor.apply();
        } else {
            editor.putBoolean("checkbox1", false);
            editor.apply();
        }
    }
});


if (preferences.getBoolean("checkbox2", false) == true) {
    checkBox2.setChecked(true);
} else {
    checkBox2.setChecked(false);

}
checkBox2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
        if (checkBox2.isChecked()) {
            editor.putBoolean("checkbox2", true);
            editor.apply();
        } else {
            editor.putBoolean("checkbox2", false);
            editor.apply();
        }
    }
});

}