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在回收器视图项目上,单击新建片段

fragment android

Kalai Selvan · 技术社区 · 7 年前

我有一个代码,用于在具有共享首选项的回收器视图中单击项目时打开活动。我正试图对碎片做同样的处理。

下面是活动代码。

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                switch(position){

                    case 0: {

                        startActivity(new Intent(WeekActivity.this, DayDetail.class));

                        sharedPreferences.edit().putString(SEL_DAY, "Monday").apply();

                        break;

                    }

                    case 1: {

                        startActivity(new Intent(WeekActivity.this, DayDetail.class));

                        sharedPreferences.edit().putString(SEL_DAY, "Tuesday").apply();

                        break;

                    }

                    case 2: {

                        startActivity(new Intent(WeekActivity.this, DayDetail.class));

                        sharedPreferences.edit().putString(SEL_DAY, "Wednesday").apply();

                        break;

                    }

                    case 3: {

                        startActivity(new Intent(WeekActivity.this, DayDetail.class));

                        sharedPreferences.edit().putString(SEL_DAY, "Thursday").apply();

                        break;

                    }

                    case 4: {

                        startActivity(new Intent(WeekActivity.this, DayDetail.class));

                        sharedPreferences.edit().putString(SEL_DAY, "Friday").apply();

                        break;

                    }

                    case 5: {

                        startActivity(new Intent(WeekActivity.this, DayDetail.class));

                        sharedPreferences.edit().putString(SEL_DAY, "Saturday").apply();

                        break;

                    }

                    default:break;
                }

            }

        });

我试过把它分成碎片

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                Fragment selectedFragment = null;

                switch (position) {

                    case 0: {

                        selectedFragment = Timetable.newInstance();

                        sharedPreferences.edit().putString(SEL_DAY, "Monday").apply();

                        break;

                    }

                    case 1: {

                        selectedFragment = Timetable.newInstance();

                        sharedPreferences.edit().putString(SEL_DAY, "Tuesday").apply();

                        break;

                    }

                    case 2: {

                        selectedFragment = Timetable.newInstance();

                        sharedPreferences.edit().putString(SEL_DAY, "Wednesday").apply();

                        break;

                    }

                    case 3: {

                        selectedFragment = Timetable.newInstance();

                        sharedPreferences.edit().putString(SEL_DAY, "Thursday").apply();

                        break;

                    }

                    case 4: {

                        selectedFragment = Timetable.newInstance();
                        sharedPreferences.edit().putString(SEL_DAY, "Friday").apply();

                        break;

                    }

                    case 5: {

                        selectedFragment = Timetable.newInstance();
                        sharedPreferences.edit().putString(SEL_DAY, "Saturday").apply();

                        break;

                    }

                    default:
                        break;

                }
                FragmentTransaction transaction = ((AppCompatActivity) getActivity()).getSupportFragmentManager().beginTransaction();
                transaction.replace(R.id.rel_layout, selectedFragment);
                transaction.commit();


            }

        });

我哪里出错了?我应该做哪些更改?我没有收到任何错误。与此同时,什么也没有发生。帮帮我:)

1 回复 | 直到 7 年前

Klevin Delimeta 7 年前

尝试:

case 0: {
         loadFragment(fragment);// method to load a fragment i.e
                               //(loadFragment(new MyFragment())

         sharedPreferences.edit().putString(SEL_DAY, "Monday").apply();
         break;
        }

然后创建loadFragment函数,如下所示:

private void loadFragment(Fragment fragment) {
    // create a FragmentManager
    FragmentManager fm = getFragmentManager();
    // create a FragmentTransaction to begin the transaction and replace the Fragment
    FragmentTransaction fragmentTransaction = fm.beginTransaction();
    // replace the FrameLayout with new Fragment
    fragmentTransaction.replace(R.id.YOUR_REPLACEMENT_LAYOUT, fragment);
    // save the changes
    fragmentTransaction.commit(); 
}