小编Dan*_*ent的帖子

有没有办法让它ViewPager不是水平滚动,而是垂直滚动？!

我已将自定义字体文件添加到我的assets/fonts文件夹中.如何从我的XML中使用它？

我可以从代码中使用它如下:

TextView text = (TextView) findViewById(R.id.textview03);
Typeface tf = Typeface.createFromAsset(getAssets(), "fonts/Molot.otf");
text.setTypeface(tf);

我不能使用android:typeface="/fonts/Molot.otf"属性从XML做到吗？

当我点击谷歌地图上的标记时,出现"导航"和"GPS指针"按钮.如何在android开发中以编程方式隐藏这两个按钮？

我是Typescript的新手,不知道怎么说这个问题.

我需要访问构造函数中传递的对象的两个"可能"属性.我知道我缺少一些检查以确定它们是否已定义,但是Typescript正在向我抛出"'对象'上不存在属性"消息.消息显示在选择器上,模板返回.

class View {
    public options:Object = {};

   constructor(options:Object) {
       this.options = options;
   }

   selector ():string {
       return this.options.selector;
   }   

   template ():string {
       return this.options.template;
   }   

   render ():void {

   }   
}

我确信它相当简单,但是Typescript对我来说是新的.

我的应用程序的一部分需要位置服务,因此如果当前关闭位置,应用程序将提示用户启用它.下面是我正在做它:(也见于这个堆栈溢出的答案)

LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
            .addLocationRequest(mLocationRequest);
builder.setAlwaysShow(true);

PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());

result.setResultCallback(new ResultCallback<LocationSettingsResult>() 
{
     @Override
     public void onResult(LocationSettingsResult result) 
     {
         final Status status = result.getStatus();
         final LocationSettingsStates = result.getLocationSettingsStates();
         switch (status.getStatusCode()) 
         {
             case LocationSettingsStatusCodes.SUCCESS:
                 // All location settings are satisfied. The client can initialize location
                 // requests here.
                 ...
                 Log.d("onResult", "SUCCESS");
                 break;
             case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                 // Location settings are not satisfied. But could be fixed by showing the user
                 // a dialog.
                 Log.d("onResult", "RESOLUTION_REQUIRED");
                 try …

在清单文件中,我添加了粗略和精细的权限,当我在使用Android 6的设备上运行时,没有任何反应!我尝试了一切,但无法获得位置更新......

我究竟做错了什么？

public class MainActivity extends AppCompatActivity implements LocationListener {

    LocationManager locationManager;
    String provider;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        provider = locationManager.getBestProvider(new Criteria(), false);

        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. …

我想谷歌地图显示用户的位置.我尝试了这段代码,但它在Android 6上无效.

private GoogleMap map;
LocationManager lm;
LocationListener ll;
Location l;

LatLng pos;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.start_layout);

    lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
    ll = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            l = (Location) location;
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {}

        @Override
        public void onProviderEnabled(String provider) {}

        @Override
        public void onProviderDisabled(String provider) {}
    };

    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.nMap);
    mapFragment.getMapAsync(this);
}

@Override
public void onMapReady(GoogleMap googleMap) {
    map = …

我想替换已弃用的getMap方法getMapAsync,但我没有使用,MapFragment但是GoogleMap像这样:

private GoogleMap googleMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_map);

    try {
        if(googleMap == null) {
            googleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
        }
        googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
        googleMap.setMyLocationEnabled(true);
        googleMap.setTrafficEnabled(true);
        googleMap.setIndoorEnabled(true);
        googleMap.setBuildingsEnabled(true);
        googleMap.getUiSettings().setZoomControlsEnabled(true);

如果我更换googleMap与MapFragment这样我不能再对setMapType等.那么我怎么能改变getMapAsync我的情况呢？

MapFragment mapFragment = (MapFragment) getFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);

谷歌搜索,阅读数百万关于如何生成谷歌API密钥的建议,如何使用它但没有任何作用!

1. 启用了Google地图v2 API
2. 使用谷歌地图创建一个带有一个活动的项目(工作室中的默认向导)
3. 在谷歌上为调试项目创建了密钥,为其分配了SHA1;应用程序包的应用程序到谷歌上的项目密钥
4. API密钥已插入google_maps_api.xml(AndroidManifest.xml自动更新)
5. 在应用程序正在运行的AVD上构建和运行,将显示地图.

然后:

1. API已启用
2. 在Android studio中创建了用于发布的密钥库(keystore.rel.jks)
3. 生成的指纹(keytool -list -v -keystore C:\ Dropbox\AndroidKeyStore\keystore.rel.jks)
4. 谷歌上添加新指纹到新发布项目(发布SHA1;应用程序包) - 密钥生成AIza ...
5. API密钥已插入google_maps_api.xml(AndroidManifest.xml会自动更新)
6. 生成签名的应用程序(使用keystore.rel.jks)并在真实设备上安装...应用程序正在运行,地图仍然是空白,只有缩放按钮和谷歌标签打开

提前感谢任何建议.

兹德涅克

我想定期(比如每2分钟)当前位置更新为这个我下面的官方文档,我写了这个代码,但它不会给当前的位置即使在我传递requestLocationUpdates LocationRequest对象指定每两分钟更新( ),这里是代码:

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback,
    GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener{

private FusedLocationProviderClient FusedLocationClient;
private GoogleApiClient mGoogleApiClient;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    if (mGoogleApiClient == null) {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }

 SupportMapFragment map = 
  getSupportFragmentManager().findFragmentById(R.id.map));

  map.getMapAsync(this);

  FusedLocationClient LocationServices.getFusedLocationProviderClient(this);
}


@Override
public void onConnected(Bundle bundle) {
    FusedLocationClient.getLastLocation()
            .addOnSuccessListener(this, new OnSuccessListener<Location>() {
                @Override
                public void onSuccess(Location location) {

                    if (location != null) {
                        Log.i("MainActivity ", "" + location.getLongitude()) 
                    }
                }
            });
FusedLocationClient = …