Question

我的问题是我要从活动中删除Fragment。有两个步骤：

通过查看Fragment将FrameLayout添加到CheckBox（R.id.frame_for_des_details）。

点击Fragment

删除TextView

public class CreateTripActivity extends FragmentActivity {

//Vars for Destination Fragment
private CheckBox checkBox;
private DestinationDetailsFragment destinationDetailsFragment;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

//Setting the ContentView
setContentView(R.layout.activity_create_trip);

//Set the Destination Checkbox listener
checkBox = (CheckBox) this.findViewById(R.id.checkBox_destination_now);

CheckBox的听众：

    checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

            //Adding the Fragment. THIS WORK
            destinationDetailsFragment = new DestinationDetailsFragment();
            FragmentManager fm = getFragmentManager();
            fm.beginTransaction().add(R.id.frame_for_des_details, destinationDetailsFragment).commit();

        }
    });

TextView的听众：

    findViewById(R.id.label_later).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            //Removing the Fragment. DOES NOT WORK
            FragmentManager fm = getFragmentManager();
            fm.beginTransaction().remove(destinationDetailsFragment).commit();              
        }
    });

    }

当我查看CheckBox时，我可以看到片段。但是当我点击TextView将其删除时，它仍然存在。当我再次检查CheckBox时，似乎新Fragment覆盖旧片段，因此我可以在EditText中覆盖占位符。

我希望有人了解我并能帮助我。

感谢。

Answer 1

尝试android.support.v4.app.FragmentManager。这是代码。

        destinationDetailsFragment = new DestinationDetailsFragment();
    checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(CompoundButton compoundButton,
                boolean b) {

            // Adding the Fragment. THIS WORK

            FragmentManager fm = getSupportFragmentManager();
            fm.beginTransaction()
                    .add(R.id.frame_for_des_details,
                            destinationDetailsFragment).commit();

        }
    });
    findViewById(R.id.label_later).setOnClickListener(
            new View.OnClickListener() {
                @Override
                public void onClick(View view) {

                    FragmentManager fm = getSupportFragmentManager();
                    fm.beginTransaction()
                            .remove(destinationDetailsFragment).commit();
                }
            });

Answer 2

固定

我将Fragment实现为android.support.v4.app.Fragment，但这不是问题。

在我添加片段之前，我删除了复选框。并且要删除片段我再次将复选框添加到视图中。但我也称为checkbox.setChecked（false）。那再次解雇了onCheckedChanged！

我的新代码

@Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
            if (isChecked) {
                LinearLayout layout = (LinearLayout) findViewById(R.id.layout_destination);
                //Remove and Add Content
                layout.removeView(checkBox);

                destinationDetailsFragment = new DestinationDetailsFragment();
                FragmentManager fm = getSupportFragmentManager();
                fm.beginTransaction().add(R.id.frame_for_des_details, destinationDetailsFragment).commit();

                //Enable Later Button
                findViewById(R.id.img_later).setVisibility(View.VISIBLE);
                findViewById(R.id.label_later).setVisibility(View.VISIBLE);
            }

        }

感谢。

添加后删除片段不起作用

2 个答案: