Question

我创建了2个复选框，并将其值保存在共享首选项中的布尔数据类型中。如何在另一个类中获取它并在if-else条件下使用它？

头等舱

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

        onPassCodeListener();

        cb1 = (CheckBox) findViewById(R.id.cb1);
        cb1.setChecked(getfromsp("cb1"));
        cb1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                switch (buttonView.getId()){
                    case R.id.cb1:
                        saveinsp("cb1",isChecked);
                        break;
                }
            }
        });

        cb2 = (CheckBox) findViewById(R.id.cb2);
        cb2.setChecked(getfromsp("cb2"));
        cb2.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                switch (buttonView.getId()){
                    case R.id.cb2:
                        saveinsp("cb2",isChecked);
                        break;
                }
            }
        });


    }

    public Boolean getfromsp(String key){
        sp1 = getApplicationContext().getSharedPreferences("checkbox", android.content.Context.MODE_PRIVATE);
        return sp1.getBoolean(key , false);
    }

    public void saveinsp(String key, Boolean value){
        sp1 = getApplicationContext().getSharedPreferences("checkbox", android.content.Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp1.edit();
        editor.putBoolean(key , value);
        editor.commit();
    }

和第二类

public class MyReceiver extends BroadcastReceiver {
    SharedPreferences sp1, sp2;


    @Override
    public void onReceive(Context context, Intent intent) {

        Bundle bundle = intent.getExtras();

        if(bundle != null){
            Object[] pdus = (Object[]) bundle.get("pdus");

            for (int i = 0; i < pdus.length ; i++) {
                SmsMessage sms = SmsMessage.createFromPdu((byte[]) pdus[i]);
                String message = sms.getMessageBody();

                Toast.makeText(context, "Broadcast received", Toast.LENGTH_SHORT).show();
            }
        }
        sp2 = context.getSharedPreferences("passcode", Context.MODE_PRIVATE);
        String pass = sp2.getString("passcode","");
        sp1 = context.getSharedPreferences("checbox",Context.MODE_PRIVATE);
        Boolean cb1 = sp1.getBoolean("cb1", )
        if(bundle.equals(pass)){

        }


    }

Answer 1

设置SharedPreferences

SharedPreferences sp =getSharedPreferences("checkbox", MODE_PRIVATE);
SharedPreferences.Editor et = sp.edit();
et.putBoolean("isLogin", true);
et.commit();

从SharedPreferences获取价值

SharedPreferences sp = getSharedPreferences("checkbox", 0);
boolean cb1 = sp.getBoolean("isLogin", false);

Answer 2

像这样有一百万个questons，只需1分钟谷歌搜索，你就可以实现它。

this is the same question，我复制粘贴解决方案：您可以在任何活动中使用此代码

在首选项中设置值：

// MY_PREFS_NAME - a static String variable like: 
//public static final String MY_PREFS_NAME = "MyPrefsFile";
SharedPreferences.Editor editor = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE).edit();
 editor.putString("name", "Elena");
 editor.putInt("idName", 12);
 editor.commit();

从首选项中检索数据：

SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE); 
String restoredText = prefs.getString("text", null);
if (restoredText != null) {
  String name = prefs.getString("name", "No name defined");//"No name defined" is the default value.
  int idName = prefs.getInt("idName", 0); //0 is the default value.
}

更多信息：

Using Shared Preferences

Shared Preferences

从另一个类访问共享首选项布尔值

2 个答案:

在首选项中设置值：

从首选项中检索数据：