Question

我在Android Studio中使用导航抽屉。当我在导航栏中选择一个项目时，我使用以下代码：

public void onNavigationDrawerItemSelected(int position) {
    switch(position)
        {
            case 0:
                Intent intent1 = new Intent(MainActivity.this,HomeActivity.class);
                startActivity(intent1);
                break;
            case 1:
                Intent intent2 = new Intent(MainActivity.this,DayActivity_1.class);
                startActivity(intent2);
                break;
        }
}

当我从导航抽屉项目中调用我的活动时，操作栏将消失，活动将全屏打开。如何管理导航抽屉不会消失？

Answer 1

如果要保留导航抽屉，则应更改内容片段，而不是显示活动。

在你的情况下，它会改变

Intent intent1 = new Intent(MainActivity.this,HomeActivity.class); startActivity(intent1);

使用：

FragmentManager fragmentManager = ...
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.your_fragment_container_id, new HomeFragment())
transaction.commit();

Answer 2

不要使用DayActivity_1.class活动使用片段而是当你点击导航项jst创建片段并将其替换为drawerlayout

Answer 3

在主导航活动类中扩展FragmentActivity，如下所示。

public void setContent(Fragment fragment) {
        // Fragment fragment = new content_home();
        FragmentTransaction fragmentManager = getFragmentManager().beginTransaction();
        fragmentManager.setCustomAnimations(R.animator.enter_from_left, R.animator.exit_to_left);
       // fragmentManager.beginTransaction()
        fragmentManager.replace(R.id.mainContent, fragment).commit();

    }

public void onNavigationDrawerItemSelected(int position) {
    switch(position)
        {
            case 0:

                break;
            case 1:
                Intent intent2 = new Intent(MainActivity.this,DayActivity_1.class);
                startActivity(intent2);
                break;
        }
}

public void onNavigationDrawerItemSelected(int position) {
    switch(position)
        {
            case 0:
                 Fragment homeActivityFragment = new HomeActivityFragment();
                 //if you want to pass data to fragment
                  //Bundle bundle = new Bundle();
                  //bundle.putString("id", "" + item.get("id"));
                  //homeActivityFragment.setArguments(bundle);
                 setContent(homeActivityFragment)
                break;
            case 1:
                Fragment dayActivity_1Fragment = new DayActivity_1Fragment();
                setContent(dayActivity_1Fragment)
                break;
        }
}

现在使用以下代码解决您的问题

newModel

碎片和活动

3 个答案: