小编neo*_*neo的帖子

我想使用导航抽屉中的开关按钮从主布局中添加和删除片段。

这是我的代码- menuitem.xml`

<group
    android:id="@+id/drawer_group1"
    android:checkableBehavior="single">
    <item
        android:id="@+id/nav_timer"
        android:icon="@drawable/ic_timer"
        android:title="Timer">

    </item>

    <item
        android:id="@+id/addFragment_Bt"
        app:actionViewClass="android.widget.Switch"
        android:title="Most Used" />
    <item
        android:id="@+id/nav_settings"
        android:icon="@drawable/ic_settings"
        android:title="Settings">

    </item>
</group>`

主Activity.class

public class MainActivity extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {

public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
    switch (menuItem.getItemId()) {
        switch (menuItem.getItemId()) {
            case R.id.addFragment_Bt:

                Switch switchCompat = findViewById(R.id.addMostUsed_Bt);
                switchCompat.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                    @Override
                    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                        FragmentManager fragmentManager = getSupportFragmentManager();
                        Fragment fragment = fragmentManager.findFragmentById(R.id.Most_Used_Fragment_container);
                        if (isChecked == true) {
                            if (fragment != null) {
                                fragmentManager.popBackStack(); …