Android 导航抽屉打开空白活动
我正在开发一个使用导航抽屉的应用程序。我通过点击按钮呼叫导航抽屉。但问题是,当我按下按钮时,我得到的是空白页,我的第一个项目并没有被选为主要项目,甚至我把它指示为主要项目 这是我的代码,这是我的主要活动:Android 导航抽屉打开空白活动,android,android-fragments,android-activity,navigation-drawer,Android,Android Fragments,Android Activity,Navigation Drawer,我正在开发一个使用导航抽屉的应用程序。我通过点击按钮呼叫导航抽屉。但问题是,当我按下按钮时,我得到的是空白页,我的第一个项目并没有被选为主要项目,甚至我把它指示为主要项目 这是我的代码,这是我的主要活动: package sightsOfAlmaty; import sightsOfAlmaty.NavDrawerListAdapter; import sightsOfAlmaty.NavDrawerItem; import java.util.ArrayList; import
package sightsOfAlmaty;
import sightsOfAlmaty.NavDrawerListAdapter;
import sightsOfAlmaty.NavDrawerItem;
import java.util.ArrayList;
import com.example.new1.R;
import android.app.Activity;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.app.FragmentManager;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.FrameLayout;
import android.widget.ListView;
public class sightsOfAlmaty extends ActionBarActivity {
private DrawerLayout mDrawerLayout;
protected ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private static boolean isLaunch = true;
// nav drawer title
private CharSequence mDrawerTitle;
// used to store app title
protected CharSequence mTitle;
// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;
private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;
protected FrameLayout frameLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sights);
mTitle = mDrawerTitle = getTitle();
// load slide menu items
navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
// nav drawer icons from resources
navMenuIcons = getResources()
.obtainTypedArray(R.array.nav_drawer_icons);
frameLayout = (FrameLayout)findViewById(R.id.frame_container);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.list_slidermenu);
navDrawerItems = new ArrayList<NavDrawerItem>();
// adding nav drawer items to array
// Home
navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
// Find People
navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
// Photos
navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1)));
// Communities, Will add a counter here
//navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1), true, "22"));
// Pages
navDrawerItems.add(new NavDrawerItem(navMenuTitles[4], navMenuIcons.getResourceId(4, -1)));
// What's hot, We will add a counter here
// navDrawerItems.add(new NavDrawerItem(navMenuTitles[5], navMenuIcons.getResourceId(5, -1), true, "50+"));
// Recycle the typed array
navMenuIcons.recycle();
// setting the nav drawer list adapter
adapter = new NavDrawerListAdapter(getApplicationContext(),
navDrawerItems);
mDrawerList.setAdapter(adapter);
mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
// enabling action bar app icon and behaving it as toggle button
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
//R.drawable.ic_drawer, //nav menu toggle icon
R.string.app_name, // nav drawer open - description for accessibility
R.string.app_name // nav drawer close - description for accessibility
) {
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
super.onDrawerClosed(view);
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
super.onDrawerOpened(drawerView);
}
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
super.onDrawerSlide(drawerView, slideOffset);
}
@Override
public void onDrawerStateChanged(int newState) {
super.onDrawerStateChanged(newState);
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
/**
* As we are calling BaseActivity from manifest file and this base activity is intended just to add navigation drawer in our app.
* We have to open some activity with layout on launch. So we are checking if this BaseActivity is called first time then we are opening our first activity.
* */
if(isLaunch){
/**
*Setting this flag false so that next time it will not open our first activity.
*We have to use this flag because we are using this BaseActivity as parent activity to our other activity.
*In this case this base activity will always be call when any child activity will launch.
*/
isLaunch = false;
displayView(0);
}
}
/**
* Slide menu item click listener
* */
private class SlideMenuClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// display view for selected nav drawer item
displayView(position);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// toggle nav drawer on selecting action bar app icon/title
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle action bar actions click
switch (item.getItemId()) {
case R.id.action_settings:
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/* *
* Called when invalidateOptionsMenu() is triggered
*/
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// if nav drawer is opened, hide the action items
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
/**
* Diplaying fragment view for selected nav drawer list item
* */
private void displayView(int position) {
// update the main content by replacing fragments
Fragment fragment = null;
Intent intent;
switch (position) {
case 0:
/*intent = new Intent(this, HomeFragment.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
this.startActivity(intent);*/
startActivity(new Intent(this, HomeFragment.class));
return;
case 1:
//fragment = new FindPeopleFragment();
break;
/*case 2:
fragment = new PhotosFragment();
break;
case 3:
fragment = new CommunityFragment();
break;
case 4:
fragment = new PagesFragment();
break;
case 5:
fragment = new WhatsHotFragment();
break;
*/
default:
break;
}
/*if (fragment != null) {
android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();*/
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
//} else {
// error in creating fragment
// Log.e("MainActivity", "Error in creating fragment");
//}
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggls
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
包裹瞄准;
进口Almaty.navDrawerlistatadapter;
进口Almaty.NavDrawerItem;
导入java.util.ArrayList;
导入com.example.new1.R;
导入android.app.Activity;
导入android.support.v4.app.Fragment;
导入android.support.v4.app.FragmentActivity;
导入android.app.FragmentManager;
导入android.content.Intent;
导入android.content.res.Configuration;
导入android.content.res.TypedArray;
导入android.os.Bundle;
导入android.support.v7.app.ActionBarActivity;
导入android.support.v7.app.ActionBarDrawerToggle;
导入android.support.v4.widget.DrawerLayout;
导入android.util.Log;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.view.view;
导入android.widget.AdapterView;
导入android.widget.FrameLayout;
导入android.widget.ListView;
公共级目击恐怖袭击扩大了行动范围{
私人抽屉布局mDrawerLayout;
受保护的ListView mDrawerList;
私有操作bardrawertoggle mDrawerToggle;
私有静态布尔值isLaunch=true;
//导航抽屉标题
私有字符序列mDrawerTitle;
//用于存储应用程序标题
受保护的字符序列mTitle;
//幻灯片菜单项
私有字符串[]navMenuTitles;
专用型雷达导航仪;
私人ArrayList NavWrites;
专用导航适配器;
受保护的框架布局;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.sights);
mTitle=mDrawerTitle=getTitle();
//加载幻灯片菜单项
navMenuTitles=getResources().getStringArray(R.array.nav\u抽屉\u项目);
//参考资料中的导航抽屉图标
navMenuIcons=getResources()
.obtainTypedArray(R.array.nav_drawer_图标);
frameLayout=(frameLayout)findviewbyd(R.id.frame\u容器);
mDrawerLayout=(抽屉布局)findViewById(R.id.抽屉布局);
mDrawerList=(ListView)findViewById(R.id.list\u slidermenu);
navDrawerItems=新的ArrayList();
//将导航抽屉项添加到阵列
//家
添加(新的NavDrawerItem(navMenuTitles[0],navMenuIcons.getResourceId(0,-1));
//找人
添加(新的NavDrawerItem(navMenuTitles[1],navMenuIcons.getResourceId(1,-1));
//照片
添加(新的NavDrawerItem(navMenuTitles[2],navMenuIcons.getResourceId(2,-1));
//社区,将在此处添加一个计数器
//添加(新的NavDrawerItem(navMenuTitles[3],navMenuIcons.getResourceId(3,-1),true,“22”);
//页数
add(新的NavDrawerItem(navMenuTitles[4],navMenuIcons.getResourceId(4,-1));
//什么是热的,我们将在这里加一个计数器
//add(新的NavDrawerItem(navMenuTitles[5],navMenuIcons.getResourceId(5,-1),true,“50+”));
//回收类型化数组
navMenuIcons.recycle();
//设置导航抽屉列表适配器
适配器=新的NavDroperListAdapter(getApplicationContext(),
纳维特姆斯);
mDrawerList.setAdapter(适配器);
setOnItemClickListener(新的SlideMenuClickListener());
//启用操作栏应用程序图标并将其作为切换按钮
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
mDrawerToggle=新操作BarDrawerToggle(此,mDrawerLayout,
//R.drawable.ic_抽屉,//导航菜单切换图标
R.string.app_name,//导航抽屉打开-可访问性说明
R.string.app_name//nav抽屉关闭-可访问性说明
) {
公共无效onDrawerClosed(视图){
getSupportActionBar().setTitle(mTitle);
//调用onPrepareOptions菜单()以显示操作栏图标
无效操作菜单();
super.onDrawerClosed(视图);
}
打开图纸上的公共空白(视图抽屉视图){
getSupportActionBar().setTitle(mDrawerTitle);
//调用onPrepareOptions菜单()隐藏操作栏图标
无效操作菜单();
super.onDrawerOpened(抽屉视图);
}
@凌驾
绘图滑块上的公共空白(视图抽屉视图、浮动滑块偏移){
super.onDrawerSlide(抽屉视图、滑块偏移);
}
@凌驾
DrawerStateChanged上的公共无效(int newState){
super.onDrawerStateChanged(newState);
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
/**
*因为我们正在从清单文件调用BaseActivity,这个基本活动只是为了在我们的应用程序中添加导航抽屉。
*我们必须在启动时打开一些布局为的活动。因此,我们正在检查此BaseActivity是否第一次调用,然后我们将打开第一个活动。
* */
如果(isLaunch){
/**
*将此标志设置为false,以便下次它不会打开我们的第一个活动。
*我们必须使用此标志,因为我们将此BaseActivity用作其他活动的父活动。
*在这种情况下,当任何子活动启动时,将始终调用此基本活动。
*/
isLaunch=false;
显示视图(0);
}
}
/**
*幻灯片菜单项单击“侦听器”
* */
私有类SlideMenuClickListener实现
ListView.com侦听器{
@凌驾
public void onItemClick(AdapterView父视图、视图、整型位置、,
长id){
//所选导航抽屉项目的显示视图
显示视图(位置);
}
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
getMenuInflater()。充气(R。
package sightsOfAlmaty;
import java.util.Hashtable;
import com.example.new1.GPSTracker;
import com.example.new1.R;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
public class HomeFragment extends sightsOfAlmaty {
public HomeFragment(){}
private GoogleMap map;
GPSTracker gps;
Marker marker;
private Hashtable<String, String> markers;
private ImageLoader imageLoader;
private DisplayImageOptions options;
protected static int position;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mDrawerList.setItemChecked(position, true);
setTitle(mTitle);
getLayoutInflater().inflate(R.layout.fragment_home, frameLayout);
/**
* Setting title and itemChecked
*/
gps = new GPSTracker(this);
LatLng myloc = new LatLng(gps.getLatitude(), gps.longitude);
map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map2)).getMap();
map.getUiSettings( ).setZoomControlsEnabled(true); // true to enable
map.moveCamera(CameraUpdateFactory.newLatLngZoom(myloc, 15));
map.animateCamera(CameraUpdateFactory.zoomTo(13), 2000, null);
}
}
if(isLaunch){
/**
*Setting this flag false so that next time it will not open our first activity.
*We have to use this flag because we are using this BaseActivity as parent activity to our other activity.
*In this case this base activity will always be call when any child activity will launch.
*/
isLaunch = false;
displayView(0);
}
if(savedInstanceState == null) {
displayView(0);
}