Question

我正在使用滑动屏幕进行Android应用。我做了以下教程：http://developer.android.com/training/animation/screen-slide.html#fragment

我想使用html标签对我的字符串值中的文本进行一些编辑。我希望能够做段落和粗体字。但我不知道怎么样，我似乎无法在任何地方找到解决方案。通常我只是用这个：

textView.setText(Html.fromHtml(getString(R.string.instruct)));

但是我不明白我如何使用Fragment类和ViewPager来做到这一点。

以下是我的Fragment类：

public class InstructSSPageFrag1 extends Fragment{

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.instruct, container, false);

        return rootView;
    }
}

这是instructionactivity_screen_slide.xml：

<android.support.v4.view.ViewPager
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

这是我的Fragment活动以及适配器和寻呼机适配器：

    public class InstructionActivity extends FragmentActivity{

        private static final int NUM_PAGES=5;

        private ViewPager mPager;

        private PagerAdapter mPagerAdapter;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.instructionactivity_screen_slide);


            // Instantiate a ViewPager and a PagerAdapter.
            mPager = (ViewPager) findViewById(R.id.pager);
            mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
            mPager.setAdapter(mPagerAdapter);
        }

        public void onBackPressed() {
            if (mPager.getCurrentItem() == 0) {

                super.onBackPressed();
            } else {
                // Otherwise, select the previous step.
                mPager.setCurrentItem(mPager.getCurrentItem() - 1);
            }
        }

        private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
            public ScreenSlidePagerAdapter(FragmentManager fm) {
                super(fm);
            }

            @Override
            public Fragment getItem(int position) {
                return new InstructSSPageFrag1();
            }

            @Override
            public int getCount() {
                return NUM_PAGES;
            }
        }
}

是否可以为Fragment class / Viewpager使用html标签？

编辑：我尝试使用Atul O Holic的代码

public class InstructSSPageFrag1 extends Fragment{
    private TextView tvFrag;
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.instruct, container, false);
        String text = getActivity().getString(R.string.instructionstring);
        tvFrag.setText(Html.fromHtml(text));
        return rootView;
    }

然而，当我进入片段时它会导致力量关闭。以下是错误：

03-20 16:14:06.329: E/AndroidRuntime(7039): FATAL EXCEPTION: main
03-20 16:14:06.329: E/AndroidRuntime(7039): java.lang.NullPointerException
03-20 16:14:06.329: E/AndroidRuntime(7039):     at com.apps.swipeapp.InstructSSPageFrag1.onCreateView(InstructSSPageFrag1.java:18)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.app.Fragment.performCreateView(Fragment.java:1500)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:472)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.view.View.measure(View.java:15473)
03-20 16:14:06.329: E/AndroidRuntime(7039):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5056)

Answer 1

首先使用Fragment中的上下文从strings.xml文件中访问字符串。

 String text = getActivity().getString(R.string.yourString);

然后以您遵循的常规方式应用格式。

 myFragmentTextView.setText(Html.fromHtml(text));

您也可以在一行中完成。希望这可以帮助。：）

修改

初始化TextView，

tvFrag = (TextView) rootView.findViewById(R.id.yourTextViewID);

然后再做，

tvFrag.setText(Html.fromHtml(text));

在滑动页面中使用HTML标签？

1 个答案: