当我将应用程序放入清单中时，我的应用程序中的Google地图存在问题：
<activity
android:name="com.journaldev.MapsInAction.MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
但是，当此活动在我的第二地点时，我只会看到白屏，而且我不知道我做错了什么
这是我的activity_main：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:id="@+id/cor"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".activities.MainActivity">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".activities.MainActivity" />
</RelativeLayout>
这是我的日志
12:40:26.416 17851-17985/pl.logistic I/System.out: (HTTPLog)-Static: isShipBuild true
04-04 12:40:26.416 17851-17985/pl.logistic I/System.out: (HTTPLog)-Static: getDebugLevel 0x4f4c
04-04 12:40:26.416 17851-17985/pl.logistic I/System.out: (HTTPLog)-Thread-4478-211231246: SmartBonding Enabling is true, SHIP_BUILD is true, log to file is false, DBG is false, DEBUG_LEVEL (1-LOW, 2-MID, 3-HIGH) is 1
04-04 12:40:26.416 17851-17985/pl.eltegps.logistic I/System.out: (HTTPLog)-Thread-4478-211231246: SMARTBONDING_FEATURE_ENABLED is true
04-04 12:40:26.416 17851-17985/pl.logistic I/System.out: (HTTPLog)-Static: isSBSettingEnabled true
这是我的MainActivity代码：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pgoList = ((PGOList) getIntent().getSerializableExtra("list"));
view = getWindow().getCurrentFocus();
// Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
// setSupportActionBar(toolbar);
File excelFile = Environment.getExternalStorageDirectory();
tts = new TextToSpeech(this, this);
// coordinatorLayout = (CoordinatorLayout) findViewById(R.id.cor);
File f = new File(excelFile + "/b.json");
final List<Uri> uris = new ArrayList<>();
uris.add(Uri.fromFile(f));
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
gMap = googleMap;
gMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
}
我认为这是我的难题：
private class LoginTask extends AsyncTask<Void, Void, Result> {
LoginRequest request = null;
@Override
protected void onPreExecute() {
taskRunning(true);
progressDialog.show();
}
@Override
protected Result doInBackground(Void... params) {
request = new LoginRequest();
String currentLang = Locale.getDefault().getLanguage();
if (!StringUtils.isEmpty(currentLang)) {
request.lang = currentLang;
}
request.os = "ANDROID " + android.os.Build.VERSION.RELEASE;
try {
PackageInfo pInfo = getPackageManager().getPackageInfo(getPackageName(), 0);
String version = pInfo.versionName;
if (!StringUtils.isEmpty(version)) {
request.ver = version;
}
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
request.login = etLogin.getText().toString();
request.firm = etFirm.getText().toString();
request.password = etPassword.getText().toString();
request.device_id = prefs.getDeviceID();
Log.d("device id ", "device id " + prefs.getDeviceID());
if (TextUtils.isEmpty(request.device_id)) {
LoginResult result = new LoginResult();
result.status = Result.Code.STATUS_ERR_LOGIN_AD;
return result;
}
return new SoapManager(LoginActivity.this).invokeSoapMethod(request, this);
}
protected void onCancelled() {
Tools.makeToast(LoginActivity.this, LoginActivity.this.getString(R.string.operationCancelled));
taskRunning(false);
}
@SuppressLint("StringFormatInvalid")
@Override
protected void onPostExecute(Result result) {
taskRunning(false);
progressDialog.dismiss();
if (result != null) {
switch (((LoginResult) result).status) {
case Result.Code.STATUS_OK:
prefs.set(Preferences.Key.PERSISTANT_USER_UID, ((LoginResult) result).uid);
prefs.set(Preferences.Key.IS_NOT_FIRST_RUN, true);
/**
* Used for user session refreshing - getting new PERSISTANT_USER_UID.
*/
prefs.set(Preferences.Key.PERSISTANT_USER_NAME, etLogin.getText().toString());
prefs.set(Preferences.Key.PERSISTANT_USER_PASSWORD, etPassword.getText().toString());
prefs.set(Preferences.Key.PERSISTANT_USER_FIRM, etFirm.getText().toString());
if (!StringUtils.isEmpty(request.ver)) {
prefs.set(Preferences.Key.PERSISTANT_USER_VER, request.ver);
}
if (!StringUtils.isEmpty(request.lang)) {
prefs.set(Preferences.Key.PERSISTANT_USER_LANG, request.lang);
}
/**
* Starting database update service - downloading dictionaries.
*/
// if (Preferences.runUpdateService)
// startService(new Intent(LoginActivity.this, UpdateService.class));
editor.putString("login", etLogin.getText().toString()).apply();
editor.putString("firm", etFirm.getText().toString()).apply();
startActivity(new Intent(LoginActivity.this, RMActivity.class));
return;
case Result.Code.STATUS_ERR_LOGIN_AD:
Tools.showOkDialog(LoginActivity.this,
R.string.accessDeniedTitle,
!TextUtils.isEmpty(request.device_id) ?
String.format(getString(R.string.accessDeniedMessage), request.device_id) :
getString(R.string.noIMEIAvailable));
return;
case Result.Code.STATUS_ERR:
default:
break;
}
}
Tools.makeToast(LoginActivity.this, LoginActivity.this.getString(R.string.loginFailed));
}
}
答案 0 :(得分：0)
1.Add required permisson on manifeast:
<!--Permissions-->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.
READ_GSERVICES" />
<!--Google MAP API key-->(i think you are not mentioned mapkey)
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="YOUR MAP KEY" />
在xml文件中
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map"
tools:context=".MapsActivity"
android:name="com.google.android.gms.maps.SupportMapFragment" />
在Java中
private GoogleMap mMap;
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Add a marker in Sydney, Australia, and move the camera.
LatLng india= new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(india).title("Marker in india"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(india));
}