我在导航抽屉中显示地图活动时遇到问题。这是我的代码。
MainActivity.java（这是我的导航抽屉）
public class MainActivity extends ActionBarActivity {
private ListView mDrawerList;
private DrawerLayout mDrawerLayout;
private ArrayAdapter<String> mAdapter;
private ActionBarDrawerToggle mDrawerToggle;
private String mActivityTitle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDrawerList = (ListView)findViewById(R.id.navList);
mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
mActivityTitle = getTitle().toString();
addDrawerItems();
setupDrawer();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
private void addDrawerItems() {
String[] Array = { "Driver Details", "Track Me", "Contact", "Report Driver", "Call For Emergency", "Rate Taxi", "Favorites", "Top Drivers", "Security Tips" };
mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, Array);
mDrawerList.setAdapter(mAdapter);
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch (position){
case 0:
startActivity(new Intent(getBaseContext(), DriverDetails.class));
break;
case 1:
startActivity(new Intent(getBaseContext(), MapsActivity.class));
break;
case 2:
Toast.makeText(MainActivity.this, "Contact", Toast.LENGTH_SHORT).show();
break;
case 3:
Toast.makeText(MainActivity.this, "Report Driver", Toast.LENGTH_SHORT).show();
break;
case 4:
Toast.makeText(MainActivity.this, "Call for Emergency", Toast.LENGTH_SHORT).show();
break;
case 5:
Toast.makeText(MainActivity.this, "Rate Taxi", Toast.LENGTH_SHORT).show();
break;
case 6:
Toast.makeText(MainActivity.this, "Favorites", Toast.LENGTH_SHORT).show();
break;
case 7:
Toast.makeText(MainActivity.this, "Top Drivers", Toast.LENGTH_SHORT).show();
break;
case 8:
Toast.makeText(MainActivity.this, "Security Tips", Toast.LENGTH_SHORT).show();
break;
}
}
});
}
private void setupDrawer() {
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getSupportActionBar().setTitle("TaxiSafe");
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getSupportActionBar().setTitle(mActivityTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerToggle.setDrawerIndicatorEnabled(true);
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
@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);
mDrawerToggle.onConfigurationChanged(newConfig);
}
@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_main, 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;
}
// Activate the navigation drawer toggle
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
MapsActivity.java
public class MapsActivity extends FragmentActivity {
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
setUpMapIfNeeded();
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
}
activity_maps.xml
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="386dp"
android:layout_height="573dp" android:id="@+id/map"
tools:context="com.example.group.taxisafe.MapsActivity"
android:name="com.google.android.gms.maps.SupportMapFragment" />
</LinearLayout>
的AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but are recommended.
-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@mipmap/taxisafe"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".Login"
android:label="TaxiSafe" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Register"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Home"
android:label="@string/title_activity_home" >
</activity>
<activity
android:name=".DriverDetails"
android:label="@string/title_activity_driver_details" >
</activity>
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
</activity>
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="@string/google_maps_key" />
<activity
android:name=".MapsActivity"
android:label="@string/title_activity_maps" >
</activity>
</application>
我在创建谷歌地图的单独项目中工作正常。当我把它放到我的项目中时，它总是在我每次选择导航抽屉中的跟踪时停止。我不知道我的代码有什么问题或我的代码缺少什么。
答案 0 :(得分：1)
将您的Mapfragemnt扩展为Fragemnt ..而不是FragmentActivity ...
然后在您的主要活动中，请拨打以下代码...
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.content_frame, MapActivity());
fragmentTransaction.commit();
R.id.content_frame是MainActivity.xml中的framelayout ...
由于你没有发布MainActivity.xml
，我不知道你给framelayout的id是多少答案 1 :(得分：1)
我只是清理我的项目并再次构建它。然后当我再次运行时它正在工作。我不知道会发生什么。 ：） 谢谢您的意见。 ：）