Question

我正在尝试将这两个功能都集成到Fragment中，但到目前为止还没有成功。它向我显示Cannot resolve method findViewById和ListView中的错误ViewPager以及Cannot resolve constructor ArrayAdapter(this, android.R.layout.simple_list_item_1, categoria)我要做的是从我的IntroActivity.java进入FmMenu.java并使用导航抽屉导航到我的其他片段FmContact.java，导航抽屉位于MenuActivity.java的单独班级中。

这是我的FmMenu.java

import java.util.ArrayList;
import java.util.List;

import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;

import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * Created by WiLo on 2/13/2015.
 */
public class FmMenu extends Fragment {

    String[] categoria = {
            "Jeans"
    };

    int[] imagenes = {
            R.drawable.veroxjeans1,
            R.drawable.veroxjeans2,
            R.drawable.veroxjeans3,
            R.drawable.veroxjeans4,
            R.drawable.veroxjeans5,
            R.drawable.veroxjeans6,
            R.drawable.veroxjeans7
    };

    SectionsPagerAdapter mSectionsPagerAdapter;
    ViewPager mViewPager;

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

        View rootView = inflater.inflate(R.layout.lay_menufragment, container, false);



        //lista
        ListView lista = (ListView) findViewById(R.id.listView1);
        ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, categoria);
        lista.setAdapter(adapter);

        //galeria de imagenes

        mSectionsPagerAdapter = new SectionsPagerAdapter(getChildFragmentManager());

        mViewPager = (ViewPager) findViewById(R.id.pager);
        mSectionsPagerAdapter.addfragments(PlaceholderFragment.newInstance(imagenes[0]));
        mSectionsPagerAdapter.addfragments(PlaceholderFragment.newInstance(imagenes[1]));
        mSectionsPagerAdapter.addfragments(PlaceholderFragment.newInstance(imagenes[2]));
        mSectionsPagerAdapter.addfragments(PlaceholderFragment.newInstance(imagenes[3]));
        mSectionsPagerAdapter.addfragments(PlaceholderFragment.newInstance(imagenes[4]));
        mSectionsPagerAdapter.addfragments(PlaceholderFragment.newInstance(imagenes[5]));
        mSectionsPagerAdapter.addfragments(PlaceholderFragment.newInstance(imagenes[6]));

        mViewPager.setAdapter(mSectionsPagerAdapter);

        return rootView;

    }

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


    }**/

    public class SectionsPagerAdapter extends FragmentPagerAdapter {

        List<Fragment> fragmentos;
        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
            fragmentos = new ArrayList<Fragment>();
        }

        public void addfragments(Fragment xfragment){
            fragmentos.add(xfragment);
        }


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

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


    public static class PlaceholderFragment extends Fragment {

        private static final String ARG_IMAGE = "imagen";
        private int imagen;

        public static PlaceholderFragment newInstance(int imagen) {
            PlaceholderFragment fragment = new PlaceholderFragment();
            Bundle args = new Bundle();
            args.putInt(ARG_IMAGE, imagen);
            fragment.setArguments(args);
            fragment.setRetainInstance(true);
            return fragment;
        }

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            if(getArguments() != null) {
                imagen = getArguments().getInt(ARG_IMAGE);
            }
        }

        public PlaceholderFragment() {
        }

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

            ImageView imagenView = (ImageView) rootView.findViewById(R.id.imageView1);
            imagenView.setImageResource(imagen);
            return rootView;
        }
    }

}

这是我的IntroActivity.java

import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;

/**
 * Created by WiLo on 2/13/2015.
 */
public class IntroActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
        /*getActionBar().hide();*/
        setContentView(R.layout.activity_intro);
        Log.i("BunBunUp", "MainActivity Created");
    }

    /**@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_intro, 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);
    }**/

    public void startMenuActivity(View v){
        Intent intent = new Intent(IntroActivity.this, MenuActivity.class);
        startActivity(intent);
    }

    protected void onResume(){
        super.onResume();
        Log.i("BunBunUp", "IntroActivity Resumed");
    }

    protected void onPause(){
        super.onPause();
        Log.i("BunBunUp", "IntroActivity Paused");
    }

    protected void onStop(){
        super.onStop();
        Log.i("BunBunUp", "IntroActivity Stopped");
    }
}

欢迎任何帮助

Answer 1

您需要引用其View对象（rootView）来调用方法，如：

ListView lista = (ListView) rootView.findViewById(R.id.listView1);

我假设 lay_menufragment xml包含listView1作为ListView元素的ID。以相同的方式修复其他类似的编译错误。

我不知道您是如何通过Intent，布局或其他方式启动FmMenu片段的。请发布布局文件，如lay_menufragment，以节省时间。

带有导航抽屉的片段中的ListView和ViewPager

1 个答案: