switch语句中的toast一直不消失

Question

@Override

public boolean onOptionsItemSelected(MenuItem item) {

mDrawerToggle.onOptionsItemSelected(item);

// TODO 自动生成的方法存根

switch(item.getItemId()){

case 1:

mBaiduMap = mMapView.getMap();

// 开启定位图层

mBaiduMap.setMyLocationEnabled(true);

// 定位初始化

mLocClient = new LocationClient(getApplicationContext());

mLocClient.registerLocationListener(myListener);

LocationClientOption option = new LocationClientOption();

option.setOpenGps(true);// 打开gps

option.setCoorType("bd09ll"); // 设置坐标类型

option.setScanSpan(1000);

mLocClient.setLocOption(option);

mLocClient.start();

mCurrentMode = LocationMode.NORMAL;

mLocClient.registerLocationListener(new BDLocationListener() {

   
        

           @Override

           public void onReceiveLocation(BDLocation location) {

               // TODO Auto-generated method stub

               if (location == null) {

                   return;

               }

               StringBuffer sb = new StringBuffer(256);

               sb.append("纬度 : ");

               sb.append(location.getLatitude());

               sb.append("n经度 : ");

               sb.append(location.getLongitude());

               Toast.makeText(NavigationDrawerActivity.this, sb.toString(), Toast.LENGTH_SHORT).show();

               

           }

            

           @Override

           public void onReceivePoi(BDLocation location) {finish();

           }

           

       });

mBaiduMap

.setMyLocationConfigeration(new MyLocationConfiguration(

mCurrentMode, true, mCurrentMarker));

break;

Answer 1

public class NavigationDrawerActivity extends Activity implements

AdapterView.OnItemClickListener {

private DrawerLayout mDrawerLayout;
// private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mCityNames;
private int[] mCityImages;
private LinearLayout left_drawer;
private ListView lv_pos;
MapView mMapView = null;  
LocationClient mLocClient;
BaiduMap mBaiduMap;
public MyLocationListenner myListener = new MyLocationListenner();
boolean isFirstLoc =true;// 是否首次定位
private LocationMode mCurrentMode;
BitmapDescriptor mCurrentMarker; 
layout geolay;

@Override
protected void

onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SDKInitializer.initialize(getApplicationContext()); 
setContentView
(R.layout.activity_navigation_drawer);
mMapView = (MapView) findViewById(R.id.bmapView);  
left_drawer = (LinearLayout) findViewById(R.id.left_drawer);// 左侧控件
lv_pos = (ListView) findViewById(R.id.lv_pos);
mTitle = mDrawerTitle = getTitle();//这里获取---没搞懂，哪位大神看到了 麻烦回下贴
mCityNames = getResources().getStringArray(R.array.drawer_items);// 城市数据，从XML文件中获取到的数组内容
TypedArray typedArray = getResources().obtainTypedArray(
R.array.city_images);
mCityImages = new int[typedArray.length()];
for (int i = 0; i < typedArray.length(); ++i) {
mCityImages[i] = typedArray.getResourceId(i, 0);
}
typedArray.recycle();
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
// mDrawerList = (ListView) findViewById(R.id.left_drawer);
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
// mDrawerList.setAdapter(new ArrayAdapter<String>(this,
// R.layout.drawer_list_item, mCityNames));
lv_pos.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, mCityNames));
lv_pos.setOnItemClickListener(this);
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);

}

public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {// 当内容为空的时候默认启动的页面
selectItem(0);
}
}
@Override  
   protected void onDestroy() {  
if (mLocClient!=null) {
mLocClient.stop();
}
//  
// // 关闭定位图层
// mBaiduMap.setMyLocationEnabled(false);
// mMapView.onDestroy();
// mMapView = null;
super.onDestroy();
   }  
   @Override  
   protected void onResume() {  
       super.onResume();  
       //在activity执行onResume时执行mMapView. onResume ()，实现地图生命周期管理  
       mMapView.onResume();  
       }  
   @Override  
   protected void onPause() {  
       super.onPause();  
       //在activity执行onPause时执行mMapView. onPause ()，实现地图生命周期管理  
       mMapView.onPause();  
       }  
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
mDrawerToggle.onOptionsItemSelected(item);
// TODO 自动生成的方法存根
switch(item.getItemId()){
case 1:
mBaiduMap = mMapView.getMap();
// 开启定位图层
mBaiduMap.setMyLocationEnabled(true);
// 定位初始化
mLocClient = new LocationClient(getApplicationContext());
mLocClient.registerLocationListener(myListener);
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true);// 打开gps
option.setCoorType("bd09ll"); // 设置坐标类型
option.setScanSpan(1000);
mLocClient.setLocOption(option);
mLocClient.start();
mCurrentMode = LocationMode.NORMAL;
mLocClient.registerLocationListener(new BDLocationListener() {
            
           @Override
           public void onReceiveLocation(BDLocation location) {
               // TODO Auto-generated method stub
               if (location == null) {
                   return;
               }
               StringBuffer sb = new StringBuffer(256);
               sb.append("纬度 : ");
               sb.append(location.getLatitude());
               sb.append("n经度 : ");
               sb.append(location.getLongitude());
               Toast.makeText(NavigationDrawerActivity.this, sb.toString(), Toast.LENGTH_SHORT).show();
               
           }
            
           @Override
           public void onReceivePoi(BDLocation location) {finish();
           }
           
       });

mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
break;
case 2:
mBaiduMap = mMapView.getMap();
// 开启定位图层
mBaiduMap.setMyLocationEnabled(true);
// 定位初始化
mLocClient = new LocationClient(getApplicationContext());
mLocClient.registerLocationListener(myListener);
LocationClientOption option1 = new LocationClientOption();
option1.setOpenGps(true);// 打开gps
option1.setCoorType("bd09ll"); // 设置坐标类型
option1.setScanSpan(1000);
mLocClient.setLocOption(option1);
mLocClient.start();
mCurrentMode = LocationMode.FOLLOWING;
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
break;
case 3:
 Intent intent = new Intent(this, Offline.class);
       startActivity(intent);
//        finish();
break;

}
return false;
//return super.onOptionsItemSelected(item);
}
// @Override
// public boolean onOptionsItemSelected(MenuItem item) {
// return mDrawerToggle.onOptionsItemSelected(item)
// || super.onOptionsItemSelected(item);
// }
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
selectItem(position);
}

private void selectItem(int position) {// 选中
Fragment fragment = new SampleFragment();
FragmentManager fragmentManager = getFragmentManager();
Bundle args = new Bundle();
switch(position){
case 0:args.putInt(SampleFragment.ARG_IMAGE_RES, mCityImages[position]);
args.putInt(SampleFragment.ARG_ACTION_BG_RES, R.drawable.drawer_shadow);
fragment.setArguments(args);

fragmentManager.beginTransaction()
.replace(R.id.content_frame, fragment).commit();
lv_pos.setItemChecked(position, true);// Listview被选中时候设置的背景色
setTitle(mCityNames[position]);
mDrawerLayout.closeDrawer(left_drawer);
  break;
case 1:
Intent geo = new Intent(this, GeoCoderDemo.class);
        startActivity(geo);
        break;

 
case 2:Intent poi = new Intent(this, PoiSearchDemo.class);
        startActivity(poi);
        break;
 
case 3:Intent route = new Intent(this, RoutePlanDemo.class);
        startActivity(route);
        break;
}

}

@Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
SubMenu subMenu = menu.addSubMenu("action item");
subMenu.add(0, 1, 0, "定位").setIcon(R.drawable.indoor_loc_suc);;
subMenu.add(0, 2, 0, "跟随").setIcon(R.drawable.icon_track_mark_focus);
subMenu.add(0, 3, 0, "离线地图 ").setIcon(R.drawable.icon_realtime_select);
MenuItem menuItem = subMenu.getItem();
menuItem.setIcon(R.drawable.track_point_bubble);
menuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS
| MenuItem.SHOW_AS_ACTION_WITH_TEXT);
return super.onCreateOptionsMenu(menu);
}
public class MyLocationListenner implements BDLocationListener {

@Override
public void onReceiveLocation(BDLocation location) {
// map view 销毁后不在处理新接收的位置
if (location == null || mMapView == null)
return;
MyLocationData locData = new MyLocationData.Builder()
.accuracy(location.getRadius())
// 此处设置开发者获取到的方向信息，顺时针0-360
.direction(100).latitude(location.getLatitude())
.longitude(location.getLongitude()).build();
mBaiduMap.setMyLocationData(locData);
if (isFirstLoc) {
isFirstLoc = false;
LatLng ll = new LatLng(location.getLatitude(),
location.getLongitude());
MapStatusUpdate u = MapStatusUpdateFactory.newLatLng(ll);
mBaiduMap.animateMapStatus(u);
}
}

public void onReceivePoi(BDLocation poiLocation) {
}
}

Answer 2

就是你点击屏幕一下，就消失一下 ，但是过一会又显示了

Answer 3

Toast 
的显示 跟 手机系统以及 型号都有关系, 可能会产生 细微的差距. 但是不明白 你说的 不消失 是什么意
思.