怎么做？下面是我显示标签的代码。

Question

在我的Android活动中，我有radio button group和tab layout使用viewpager。有两个标签和2个单选按钮。

第一个标签是附件标签
第二个是事件标签。

当我选中第一个单选按钮时，不允许用户看到第一个选项卡，所以我需要禁用第一个选项卡并显示用户的第二个选项卡。如果我选择了第二个单选按钮，我需要启用第一个标签和用户可以访问第一个标签。我不想删除标签，我只想禁用它，以便用户无法通过滑动或点击标签来访问它。

怎么做？下面是我显示标签的代码。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.create_asset);
    //remaining code
    viewPager2 = (ViewPager) findViewById(R.id.viewPager2);
    setupViewPager2(viewPager2);
    tabLayout2 = (TabLayout) findViewById(R.id.tab_layout2);
    tabLayout2.setupWithViewPager(viewPager2);//setting tab over viewpager
    rdbGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
    }
    });

        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {

    //Implementing tab selected listener over tablayout
    tabLayout2.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            viewPager2.setCurrentItem(tab.getPosition());//setting current selected item over viewpager
            switch (tab.getPosition()) {
                case 0:
                    Log.e("TAG","TAB1");
                    break;
                case 1:
                    Log.e("TAG","TAB2");
                    break;
            }
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {
        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {
        }
    });
    }  

//Setting View Pager
private void setupViewPager2(ViewPager viewPager) {
    expAttList = new ArrayList<COAAccount>();
    adapter2 = new ViewPagerAdapter(getSupportFragmentManager());
    adapter2.addFrag(new AttachmentFragment("Attachments",expAttList,fontFamily), "Attachments");
    adapter2.addFrag(new EventFragment("Events",fontFamily), "Events");
    viewPager2.setAdapter(adapter2);
}


//View Pager fragments setting adapter class
class ViewPagerAdapter extends FragmentPagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();//fragment arraylist
    private final List<String> mFragmentTitleList = new ArrayList<>();//title arraylist

    public ViewPagerAdapter(FragmentManager manager) {
        super(manager);
    }

    @Override
    public Fragment getItem(int position) {
        return mFragmentList.get(position);
    }

    @Override
    public int getCount() {
        return mFragmentList.size();
    }


    //adding fragments and title method
    public void addFrag(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return mFragmentTitleList.get(position);
    }
}

layout档案

                <?xml version="1.0" encoding="utf-8"?>
 <android.support.v4.widget.DrawerLayout
    android:id="@+id/drawer_layout"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:fab="http://schemas.android.com/apk/res-auto"
    xmlns:local="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">
 <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

    <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="130dp"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/collapsing_toolbar"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:contentScrim="?attr/colorPrimary"
                app:layout_scrollFlags="scroll|exitUntilCollapsed">
            <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    app:layout_collapseMode="pin"/>

        </android.support.design.widget.CollapsingToolbarLayout>

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.widget.NestedScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:paddingTop="24dp">


            <android.support.v7.widget.CardView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@color/Lavender"
                    android:layout_marginBottom="16dp"
                    android:layout_marginLeft="16dp"
                    android:layout_marginRight="16dp">

                <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="vertical"
                        android:padding="16dp">


                    <android.support.design.widget.TextInputLayout

                            android:layout_width="match_parent"
                            android:layout_height="wrap_content">

                        <EditText
                                android:id="@+id/edtName"
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:inputType="text"
                                android:hint="Name" />

                    </android.support.design.widget.TextInputLayout>

                    <RadioGroup
                            android:id="@+id/rdbGroup"
                            android:layout_width="match_parent"
                            android:layout_height="25dp"
                            android:layout_marginTop="1dp"
                            android:layout_marginBottom="1dp"
                            android:background="@drawable/round_border"
                            android:orientation="horizontal" >

                        <RadioButton
                                android:id="@+id/rdb1"
                                android:layout_width="wrap_content"
                                android:layout_height="23dp"
                                android:layout_weight="1"
                                android:background="@drawable/bg_blue"
                                android:button="@android:color/transparent"
                                android:textColor="@drawable/txt_color"
                                android:gravity="center"
                                android:paddingBottom="2dp"
                                android:paddingTop="2dp"
                                android:singleLine="true"
                                android:text="radio1"
                                android:checked="true"
                                android:textSize="13sp" />

                        <View
                                android:id="@+id/vSep2"
                                android:layout_width="1dp"
                                android:layout_height="match_parent"
                                android:background="#000000"
                                android:visibility="visible" />

                        <RadioButton
                                android:id="@+id/rdb2"
                                android:layout_width="wrap_content"
                                android:layout_height="23dp"
                                android:layout_weight="1"
                                android:background="@drawable/bg_red"
                                android:button="@android:color/transparent"
                                android:textColor="@drawable/txt_color"
                                android:gravity="center"
                                android:paddingBottom="2dp"
                                android:paddingTop="2dp"
                                android:singleLine="true"
                                android:text="radio2"
                                android:textSize="13sp" />
                    </RadioGroup>
                </LinearLayout>
            </android.support.v7.widget.CardView>

            <android.support.v7.widget.CardView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@color/SkyBlue"
                    android:layout_marginBottom="16dp"
                    android:layout_marginLeft="16dp"
                    android:layout_marginRight="16dp">
                <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:orientation="vertical">

                    <android.support.design.widget.TabLayout
                            android:id="@+id/tab_layout2"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                    android:background="?attr/colorPrimary"
                     android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                    app:tabIndicatorColor="@android:color/holo_red_dark"
                    app:tabIndicatorHeight="4dp"
                            local:tabMode="scrollable" />
                    <android.support.v4.view.ViewPager
                            android:id="@+id/viewPager2"
                            android:layout_width="match_parent"
                            android:layout_height="200dp"
                            android:layout_below="@id/tab_layout"/>

                </LinearLayout>
            </android.support.v7.widget.CardView>
        </LinearLayout>
</android.support.v4.widget.NestedScrollView>

</android.support.design.widget.CoordinatorLayout>


<android.support.design.widget.NavigationView
        android:id="@+id/navigation_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="right"
        app:headerLayout="@layout/drawer_header_expense"
        app:menu="@menu/drawer"/>
</android.support.v4.widget.DrawerLayout>

Answer 1

你可以试试这个：

ViewPager viewPager2;
TabLayout tabLayout2;
ViewPagerAdapter adapter2;
RadioGroup rdbGroup;
RadioButton rdb1, rdb2;

LinearLayout tabstrip;

int pos;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //remaining code
    viewPager2 = (ViewPager) findViewById(R.id.viewPager2);
    setupViewPager2(viewPager2);
    tabLayout2 = (TabLayout) findViewById(R.id.tab_layout2);
    rdbGroup = (RadioGroup) findViewById(R.id.rdbGroup);
    rdb1 = (RadioButton) findViewById(R.id.rdb1);
    rdb2 = (RadioButton) findViewById(R.id.rdb2);

    tabLayout2.setupWithViewPager(viewPager2);//setting tab over viewpager

    //get position of already checked radiobutton
    int radioButtonID = rdbGroup.getCheckedRadioButtonId();
    View radioButton = rdbGroup.findViewById(radioButtonID);
    pos = rdbGroup.indexOfChild(radioButton);

    tabstrip = (LinearLayout) tabLayout2.getChildAt(0);

    //check which radiobutton is already checked and as per its pos disbale or enable the tabs as below
    if (pos == 0) {
        tabLayout2.getTabAt(1).select();
        tabstrip.getChildAt(0).setClickable(false);
        tabstrip.getChildAt(0).setEnabled(false);
    } else if (pos == 1) {
        tabstrip.getChildAt(0).setClickable(true);
        tabstrip.getChildAt(0).setEnabled(true);
    }

    rdbGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            pos = rdbGroup.indexOfChild(findViewById(checkedId));

            switch (pos) {
                case 0:
                    tabstrip.getChildAt(0).setClickable(false);
                    tabstrip.getChildAt(0).setEnabled(false);
                    break;
                case 1:
                    tabstrip.getChildAt(0).setClickable(true);
                    tabstrip.getChildAt(0).setEnabled(true);
                    break;
                default:
                    //here add whatever you like
                    tabstrip.getChildAt(0).setClickable(true);
                    tabstrip.getChildAt(0).setEnabled(true);
                    break;
            }
        }
    });


    //Implementing tab selected listener over tablayout
    tabLayout2.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            viewPager2.setCurrentItem(tab.getPosition());//setting current selected item over viewpager
            switch (tab.getPosition()) {
                case 0:
                    Log.e("TAG", "TAB1");
                    break;
                case 1:
                    Log.e("TAG", "TAB2");
                    break;
            }
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {
        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {
        }
    });
}

//Setting View Pager
private void setupViewPager2(ViewPager viewPager) {
    expAttList = new ArrayList<COAAccount>();
    expAttList = new ArrayList<COAAccount>();
    adapter2 = new ViewPagerAdapter(getSupportFragmentManager());
    adapter2.addFrag(new AttachmentFragment("Attachments", expAttList, fontFamily), "Attachments");
    adapter2.addFrag(new EventFragment("Events", fontFamily), "Events");
    viewPager2.setAdapter(adapter2);
}


//View Pager fragments setting adapter class
class ViewPagerAdapter extends FragmentPagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();//fragment arraylist
    private final List<String> mFragmentTitleList = new ArrayList<>();//title arraylist

    public ViewPagerAdapter(FragmentManager manager) {
        super(manager);
    }

    @Override
    public Fragment getItem(int position) {
        return mFragmentList.get(position);
    }

    @Override
    public int getCount() {
        return mFragmentList.size();
    }


    //adding fragments and title method
    public void addFrag(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return mFragmentTitleList.get(position);
    }
}

Answer 2

这是一个棘手的问题。你需要为此使用自定义ViewPager.Below是代码。将xml中的ViewPager更改为：

<yourPackage.NonSwipeableViewPager
                    android:id="@+id/pager"
                    android:layout_width="match_parent"
                    android:layout_height="400dp"
                    android:layout_below="@id/tab_layout"/>

以下是自定义视图分页器类：

public class NonSwipeableViewPager extends ViewPager {
private boolean enabled;

public NonSwipeableViewPager(Context context) {
    super(context);
    this.enabled = true;
}

public NonSwipeableViewPager(Context context, AttributeSet attrs) {
    super(context, attrs);
    this.enabled = true;
}

@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
    if (this.enabled) {
        return super.onInterceptTouchEvent(event);
    }

    return false;
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    if (this.enabled) {
        return super.onTouchEvent(event);
    }

    return false;
}

public void setPagingEnabled(boolean enabled) {
    this.enabled = enabled;
}
}

现在在您的活动中使用以下代码：

NonSwipeableViewPager viewPager = (NonSwipeableViewPager) findViewById(R.id.pager);
//write code to set viewpager to the tablayout that u have already done.Use the same.
rdbGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        pos = rdbGroup.indexOfChild(findViewById(checkedId));
        LinearLayout tabStrip = ((LinearLayout)tabLayout.getChildAt(0));
        switch (pos) {
            case 0:
                viewPager.setCurrentItem(1);
                viewPager.setPagingEnabled(false);
                tabstrip.getChildAt(0).setClickable(false);
                tabstrip.getChildAt(0).setEnabled(false);
                break;
            case 1:
                viewPager.setCurrentItem(0);
                viewPager.setPagingEnabled(true);
                tabstrip.getChildAt(0).setClickable(true);
                tabstrip.getChildAt(0).setEnabled(true);
                break;
            default:
                //here add whatever you like
                break;
        }
    }
});

根据您的要求使用swicth条件。

Android：如何根据radiobutton点击使选项卡无法选择/可转换

怎么做？下面是我显示标签的代码。

2 个答案: