Question

我是Android编程的新手，我需要你的帮助。请。我想做的事。

我创建了listview，从listview我创建了OnItemClickListener到TabbedActivity。

现在我希望每个listview项目在TabbedActivity上显示不同的文本。

这是MainActivity：

public class MainActivity extends AppCompatActivity {

Toolbar toolbar;
ListView listview;

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

    toolbar = (Toolbar) findViewById(R.id.toolbar);
    toolbar.setTitle(getResources().getString(R.string.app_name));
    listview = (ListView) findViewById(R.id.listview);

    ArrayAdapter<String> mAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, getResources().getStringArray(R.array.bolesti));

    listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int i, long id) {
            switch (i){
                case 0:
                    Intent intent = new Intent(MainActivity.this, TabbedActivity.class);
                    startActivity(intent);
                    break;
                case 1:
                    Intent intent1 = new Intent(MainActivity.this, TabbedActivity.class);
                    startActivity(intent1);
                    break;
            }

        }
    });

    listview.setAdapter(mAdapter);

}}

TabbedActivity：

public class TabbedActivity extends AppCompatActivity {

/**
 * The {@link android.support.v4.view.PagerAdapter} that will provide
 * fragments for each of the sections. We use a
 * {@link FragmentPagerAdapter} derivative, which will keep every
 * loaded fragment in memory. If this becomes too memory intensive, it
 * may be best to switch to a
 * {@link android.support.v4.app.FragmentStatePagerAdapter}.
 */
private SectionsPagerAdapter mSectionsPagerAdapter;

/**
 * The {@link ViewPager} that will host the section contents.
 */
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_tabbed);

    // Create the adapter that will return a fragment for each of the three
    // primary sections of the activity.
    mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

    // Set up the ViewPager with the sections adapter.
    mViewPager = (ViewPager) findViewById(R.id.container);
    mViewPager.setAdapter(mSectionsPagerAdapter);

    TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(mViewPager);

}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_tabbed, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

/**
 * A placeholder fragment containing a simple view.
 */
public static class PlaceholderFragment extends Fragment {
    /**
     * The fragment argument representing the section number for this
     * fragment.
     */
    private static final String ARG_SECTION_NUMBER = "section_number";

    public PlaceholderFragment() {
    }

    /**
     * Returns a new instance of this fragment for the given section
     * number.
     */
    public static PlaceholderFragment newInstance(int sectionNumber) {
        PlaceholderFragment fragment = new PlaceholderFragment();
        Bundle args = new Bundle();
        args.putInt(ARG_SECTION_NUMBER, sectionNumber);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_tabbed, container, false);
        TextView textView = (TextView) rootView.findViewById(R.id.section_label);
        textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
        return rootView;
    }
}

/**
 * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
 * one of the sections/tabs/pages.
 */
public class SectionsPagerAdapter extends FragmentPagerAdapter {

    public SectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        // getItem is called to instantiate the fragment for the given page.
        // Return a PlaceholderFragment (defined as a static inner class below).
        switch (position){
            case 0:
                Tab1Opis tab1 = new Tab1Opis();
                return tab1;
            case 1:
                Tab2Simptomi tab2 = new Tab2Simptomi();
                return tab2;
            case 2:
                Tab3Uzroci tab3 = new Tab3Uzroci();
                return tab3;
            case 3:
                Tab4Lijecenje tab4 = new Tab4Lijecenje();
                return tab4;
            default:
                return null;
        }
    }

    @Override
    public int getCount() {
        // Show 3 total pages.
        return 4;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        switch (position) {
            case 0:
                return "Opis";
            case 1:
                return "Simptomi";
            case 2:
                return "Uzroci";
            case 3:
                return "Lijecenje";
        }
        return null;
    }
}}

TabbedActivity包含4个选项卡，所有选项卡都有不同的.java类示例：

public class Tab2Simptomi extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_simptomi, container, false);
    return rootView;
}}

当我点击不同的listview项目时，我需要更改每个片段中的文本。

你能帮帮我吗？谢谢。

检查图片。非常感谢你。

ListView 1

ListView 2

Answer 1

您可以将text从MainActivity传递到TabbedActivity片段Tab2Simptomi，如下所示：

1。使用text个附加内容，将MainActivity从TabbedActivity传递到Intent。

更新onItemClick()，如下所示：

listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int i, long id) {
        switch (i){
            case 0:
                Intent intent = new Intent(MainActivity.this, TabbedActivity.class);
                intent.putExtra("YOUR_TEXT", "Text One");
                startActivity(intent);
                break;
            case 1:
                Intent intent1 = new Intent(MainActivity.this, TabbedActivity.class);
                intent1.putExtra("YOUR_TEXT", "Text Two");
                startActivity(intent1);
                break;
        }

    }
});

2。将text从TabbedActivity传递到Tab2Simptomi，将bundle设置为arguments内的SectionsPagerAdapter个片段}。

在TabbedActivity onCreate()方法中，获取从text传递的MainActivity

public class TabbedActivity extends AppCompatActivity {

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

        // Get text
        String text = getIntent().getStringExtra("YOUR_TEXT"); 

        // Pass text to SectionsPagerAdapter
        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager(), text);

        .............
        ......................     
    }
}

更新SectionsPagerAdapter以将text传递给Fragments：

public class SectionsPagerAdapter extends FragmentPagerAdapter {

    private String yourText;

    public SectionsPagerAdapter(FragmentManager fm, String yourText) {
        super(fm);
        this.yourText = yourText;
    }

    @Override
    public Fragment getItem(int position) {

        Bundle bundle = new Bundle();
        bundle.putString("YOUR_TEXT", yourText);

        switch (position){
            case 0:
                Tab1Opis tab1 = new Tab1Opis();
                tab1.setArguments(bundle); // Pass text to Tab1Opis fragment                   
                return tab1;

            case 1:
                Tab2Simptomi tab2 = new Tab2Simptomi();
                tab2.setArguments(bundle);
                return tab2;

            case 2:
                Tab3Uzroci tab3 = new Tab3Uzroci();
                tab3.setArguments(bundle);                    
                return tab3;

            case 3:
                Tab4Lijecenje tab4 = new Tab4Lijecenje();
                tab4.setArguments(bundle);
                return tab4;

            default:
                return null;
        }
    }

    @Override
    public int getCount() {
        // Show 3 total pages.
        return 4;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        switch (position) {
            case 0:
                return "Opis";
            case 1:
                return "Simptomi";
            case 2:
                return "Uzroci";
            case 3:
                return "Lijecenje";
        }
        return null;
    }
}}

3。最后从个人text获取Frgament并做任何你想做的事。

更新Tab2Simptomi，如下所示：

public class Tab2Simptomi extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_simptomi, container, false);

        String finalText = getArguments().getString("YOUR_TEXT");

        // Do something with finalText
        Toast.makeText(getActivity(), "Final Text: " + finalText, Toast.LENGTH_SHORT).show();

        return rootView;
    }
}

<强>更新

假设您的片段texts为static。

1。使用texts个附加内容，将MainActivity从TabbedActivity传递到Intent。

更新onItemClick()，如下所示：

listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int i, long id) {
        switch (i){
            case 0:
                Intent intent = new Intent(MainActivity.this, TabbedActivity.class);
                intent.putExtra("OPIS", "Item1 :: Text for Fragment OPIS");
                intent.putExtra("SIMPTOMI", "Item1 :: Text for Fragment SIMPTOMI");
                intent.putExtra("UZROCI", "Item1 :: Text for Fragment UZROCI");
                intent.putExtra("LIJECENJE", "Item1 :: Text for Fragment LIJECENJE");
                startActivity(intent);
                break;
            case 1:
                Intent intent1 = new Intent(MainActivity.this, TabbedActivity.class);
                intent1.putExtra("OPIS", "Item2 :: Text for Fragment OPIS");
                intent1.putExtra("SIMPTOMI", "Item2 :: Text for Fragment SIMPTOMI");
                intent1.putExtra("UZROCI", "Item2 :: Text for Fragment UZROCI");
                intent1.putExtra("LIJECENJE", "Item2 :: Text for Fragment LIJECENJE");
                startActivity(intent1);
                break;
        }

    }
});

2。将texts从TabbedActivity传递到Tab2Simptomi，将bundle设置为arguments内的SectionsPagerAdapter个片段}。

在TabbedActivity onCreate()方法中，获取从text传递的MainActivity

public class TabbedActivity extends AppCompatActivity {

    ArrayList<String> stringArray;

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

        stringArray = new ArrayList<String>();

        // Get texts
        String textOPIS = getIntent().getStringExtra("OPIS");
        String textSIMPTOMI = getIntent().getStringExtra("SIMPTOMI"); 
        String textUZROCI = getIntent().getStringExtra("UZROCI"); 
        String textLIJECENJE = getIntent().getStringExtra("LIJECENJE"); 

        // Add text to ArrayList
        stringArray.add(textOPIS); 
        stringArray.add(textSIMPTOMI); 
        stringArray.add(textUZROCI); 
        stringArray.add(textLIJECENJE); 

        // Pass ArrayList to SectionsPagerAdapter
        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager(), stringArray);

        .............
        ......................     
    }
}

更新SectionsPagerAdapter以将text传递给Fragments：

public class SectionsPagerAdapter extends FragmentPagerAdapter {

    private ArrayList<String> stringList;

    public SectionsPagerAdapter(FragmentManager fm, ArrayList<String> stringArray) {
        super(fm);
        this.stringList = stringArray;
    }

    @Override
    public Fragment getItem(int position) {

        Bundle bundle = new Bundle();
        bundle.putString("YOUR_TEXT", stringList.get(position)); // Get string from stringList using position

        switch (position){
            case 0:
                Tab1Opis tab1 = new Tab1Opis();
                tab1.setArguments(bundle); // Pass text to Tab1Opis fragment                   
                return tab1;

            case 1:
                Tab2Simptomi tab2 = new Tab2Simptomi();
                tab2.setArguments(bundle);
                return tab2;

            case 2:
                Tab3Uzroci tab3 = new Tab3Uzroci();
                tab3.setArguments(bundle);                    
                return tab3;

            case 3:
                Tab4Lijecenje tab4 = new Tab4Lijecenje();
                tab4.setArguments(bundle);
                return tab4;

            default:
                return null;
        }
    }

    @Override
    public int getCount() {
        // Show 3 total pages.
        return 4;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        switch (position) {
            case 0:
                return "Opis";
            case 1:
                return "Simptomi";
            case 2:
                return "Uzroci";
            case 3:
                return "Lijecenje";
        }
        return null;
    }
}}

3。最后从个人text获取Frgament并做任何你想做的事。

更新Tab2Simptomi，如下所示：

public class Tab2Simptomi extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_simptomi, container, false);

        String finalText = getArguments().getString("YOUR_TEXT");

        // Do something with finalText
        TextView yourTextView = (TextView) rootView.findViewById(R.id.your_textview);
        // Show text on TextView
        yourTextView.setText(finalText);

        Toast.makeText(getActivity(), "Final Text: " + finalText, Toast.LENGTH_SHORT).show();

        return rootView;
    }
}

希望这会有所帮助〜

Answer 2

在MainActivity中

<html>
    <head>
        <title>Form</title>
        
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
        
        <style type="text/css">
        
            #emailError{
                
                display: none;
            }
        
        </style>
        
    </head>
    <body>
        <div class="container">
          <form> 


            <div id="emailDiv" class="form-group">
              <label class="form-control-label" for="inputDanger1">Input with danger</label>
              <input type="text" class="form-control" id="email">
              <div class="form-control-feedback" id="emailError">Sorry, that username's taken. Try another?</div>
              <small class="form-text text-muted">Example help text that remains unchanged.</small>
            </div>

            <div class="form-element">
                <input type="submit" value="Sign Up" id="submitBtn">
            </div>
           </form>  
        </div>
        
                <script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
        
        <script type="text/javascript">
            

            $("#submitBtn").click(function(){
                
                $("#emailError").show();
                $("#emailDiv").addClass("has-danger");
                $("#email").addClass("form-control-danger");
            });
            
        </script>
    
    
    </body>
</html>

在TabbedActivity中，字符串标题是Title1或Title2，基于MainActivity中单击的内容。

    listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int i, long id) {
            Intent intent = new Intent(MainActivity.this, TabbedActivity.class);
            switch (i){
                case 0:
                    intent.putExtra("Title", "Title1");
                    break;
                case 1:
                    intent.putExtra("Title", "Title2");
                    break;
            }
            startActivity(intent);
        }
    });

Listview查看同一活动，其中包含选项卡式活动

2 个答案: