android - 共享首选项未更新

Question

我有一项主要 Activity 是创建共享偏好并每小时为其分配一个值。那里的共享首选项正在创建，并传递给一个 ListView ，该 ListView 使用适配器类填充并从相同的共享首选项中提取值在第二个 Activity 中，用于检索的代码写在简历中，以便它可以按下后退时显示更新的数字。看起来像这样，onlisttem click listener 将控件转发给这个 Activity ，该 Activity 应该添加或减去值并更新共享首选项，我在 onpause 和 onBackPressed 中更新它，因为我认为它太多了，无法放入 onClickListener，这是上次计数器 Activity 的代码。问题是共享首选项没有得到更新。

ImageButton add,sub,push;
TextView countkeeper, countpusher;
String []hours={"8:30 - 9:30","9:30 - 10:30","10:30 - 11:30","11:30 - 12:30","12:30 - 1:30","1:30 - 2:30","2:30 - 3:30","3:30 - 4:30","4:30 - 5:30"};
int lip,c,target;
Intent i;
SharedPreferences sp,sp1;

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

    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new PlaceholderFragment()).commit();
    }

    add=(ImageButton)findViewById(R.id.imageButton1);
    sub=(ImageButton)findViewById(R.id.imageButton2);
    push=(ImageButton)findViewById(R.id.imageButton3);
    countkeeper=(TextView)findViewById(R.id.countkeeper);
    countpusher=(TextView)findViewById(R.id.countpusher);

    sp= getSharedPreferences("Count", MODE_APPEND);
    Log.d("CurrentCountFor"+hours[lip],""+sp.getInt("CurrentCountFor"+hours[lip], 10));
    c=sp.getInt("CurrentCountFor"+hours[lip], 10);
    target=sp.getInt("TargetFor"+hours[lip], 10);



    i=getIntent();
    lip= i.getIntExtra("lip", 0);


    add.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            c = c+1;
            countkeeper.setText("Count for "+hours[lip]+" is "+c+"/"+target);



        }
    });

    sub.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            c=c-1;
            countkeeper.setText("Count for "+hours[lip]+" is "+c+"/"+target);


        }
    });
}

@Override
public void onBackPressed() {
    super.onBackPressed();
    sp1= getSharedPreferences("Count", MODE_APPEND);
    SharedPreferences.Editor edit=sp1.edit();
    edit.putInt("CurrentCountFor"+hours[lip], c);
    sp1.edit().commit();

};

@Override
protected void onPause() {
    super.onPause();
    sp1= getSharedPreferences("Count", MODE_APPEND);
    SharedPreferences.Editor edit=sp1.edit();
    edit.putInt("CurrentCountFor"+hours[lip], c);
    sp1.edit().commit();


};

请帮助任何人。

Answer 1

将 sp1.edit().commit(); 替换为 edit.commit();

你有两次相同的问题。