1
我對android應用程序開發完全陌生，目前我正在爲學校開發一個項目。如何使用導航抽屜選擇視圖預覽器
從我的理解到目前爲止，您可以使用導航抽屜來換出UI片段。 我犯了一個導航抽屜裏說的那麼遠基於這裏給出的教程正常工作：
https://developer.android.com/training/implementing-navigation/nav-drawer.html
我試圖把它切換視圖會針對與選擇的每一個項目。我做了一個視圖分頁器片段活動，我希望程序在導航抽屜（索引3）中選擇第4個項目時用我的視圖分頁器替換視圖。我在我的片段類中添加了一個switch語句，以確定要加載哪個佈局。
下面是爲導航抽屜的活動：
package com.mkge.mkg;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.widget.DrawerLayout;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class MainActivity extends FragmentActivity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mTitle;
private String[] mPageTitles;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTitle = getTitle();
mPageTitles = getResources().getStringArray(R.array.nav_draw_array);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, mPageTitles));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(
this,
mDrawerLayout,
R.drawable.ic_drawer,
R.string.drawer_open,
R.string.drawer_close
) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(R.string.drawer_open);
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) return true;
return super.onOptionsItemSelected(item);
}
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
}
private void selectItem(int position) {
Fragment fragment = new PageFragment();
Bundle args = new Bundle();
args.putInt(PageFragment.ARG_PAGE_NUMBER, position);
fragment.setArguments(args);
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
mDrawerList.setItemChecked(position, true);
setTitle(mPageTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
public static class PageFragment extends Fragment {
public static final String ARG_PAGE_NUMBER = "page_number";
public PageFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
int i = getArguments().getInt(ARG_PAGE_NUMBER);
View rootView;
switch(i) {
case 0:
rootView = inflater.inflate(R.layout.page_home, container, false);
break;
case 1:
rootView = inflater.inflate(R.layout.page_services, container, false);
break;
case 2:
rootView = inflater.inflate(R.layout.page_packages, container, false);
break;
case 3:
View view = new MeetViewPager().getViewPager();
rootView = view;
break;
case 4:
rootView = inflater.inflate(R.layout.page_about, container, false);
break;
case 5:
rootView = inflater.inflate(R.layout.page_contact, container, false);
break;
case 6:
rootView = inflater.inflate(R.layout.page_extras, container, false);
break;
default:
rootView = null;
}
String page = getResources().getStringArray(R.array.nav_draw_array)[i];
getActivity().setTitle(page);
return rootView;
}
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
我做了這個片段活動在這裏創建視圖尋呼機。我試着把我在這裏製作的view pager對象傳遞給我的導航抽屜活動的switch語句。
package com.mkge.mkg;
import java.util.ArrayList;
import java.util.List;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
@SuppressLint("ValidFragment")
public class MeetViewPager extends FragmentActivity {
public ViewPager mViewPager;
public FragmentPagerAdapter mViewPagerAdapter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.page_meet);
List<Fragment> fragments = getFragments();
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPagerAdapter = new mPageAdapter(getSupportFragmentManager(), fragments);
mViewPager.setAdapter(mViewPagerAdapter);
}
public View getViewPager() {
return mViewPager;
}
private List<Fragment> getFragments() {
List<Fragment> fList = new ArrayList<Fragment>();
Fragment fragment = new mFragment();
Bundle args = new Bundle();
args.putInt("position", 0);
fragment.setArguments(args);
fList.add(fragment);
fragment = new mFragment();
args = new Bundle();
args.putInt("position", 1);
fragment.setArguments(args);
fList.add(fragment);
return fList;
}
private class mPageAdapter extends FragmentPagerAdapter {
private List<Fragment> fragments;
public mPageAdapter(FragmentManager f, List<Fragment> fragments) {
super(f);
this.fragments = fragments;
}
@Override
public Fragment getItem(int position) {
return this.fragments.get(position);
}
@Override
public int getCount() {
return this.fragments.size();
}
}
@SuppressLint("ValidFragment")
public static class mFragment extends Fragment {
public mFragment() {
}
public static final mFragment newInstance(int i) {
mFragment f = new mFragment();
Bundle args = new Bundle(1);
args.putInt("position", i);
f.setArguments(args);
return f;
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v;
int i = getArguments().getInt("postion");
switch(i) {
case 0:
v = inflater.inflate(R.layout.page_meet_0, container, false);
break;
case 1:
v = inflater.inflate(R.layout.page_meet_1, container, false);
break;
default:
v = null;
}
return v;
}
}
}
任何幫助，將不勝感激謝謝。
您是否找到解決方案？我被困在從導航抽屜中調用ViewPager。 – VipulKumar