小编Asd*_*tes的帖子

我试图在一个非常简单的应用程序(一个只有谷歌地图活动的新项目)中显示谷歌地图,清单具有以下权限:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.ivan.pruebamaps">

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">


<meta-data
    android:name="com.google.android.geo.API_KEY"
    android:value="@string/google_maps_key" />

<activity
    android:name=".MapsActivity"
    android:label="@string/title_activity_maps">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>
</application>

    </manifest>

我在@ string/google_maps_key中有一个有效的密钥.

它没有触及mainActivity,就像它在android studio中创建的一样.

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this); …

我在片段中加载谷歌地图时遇到问题.一切都从一个启动活动"ViatgeDetallViewActivity"的回收器视图适配器开始:

Context context = mActivity.getApplicationContext(); 
                    Intent intent = new Intent(context, ViatgeDetallViewActivity.class);
                   holder.mViatge.getId());
                    intent.putExtra("desc",p.getDesc());
                    intent.putExtra("location",p.getLocation());
                    mActivity.startActivityForResult(intent,ACTIVITY_View);

这是我的DetallViewActivity:

public class ViatgeDetallViewActivity extends AppCompatActivity {

ViatgeDetallViewFragment fragment;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_view);
    Bundle extras = getIntent().getExtras();
    if(extras != null)
    {

        String s =  getIntent().getStringExtra("desc");
        Location l = getIntent().getParcelableExtra("location");

        Log.d("myTag", "estoy en el oncreate de detallviewActivity pasando pro extras" + s );


    }

        fragment = new ViatgeDetallViewFragment();


        getSupportFragmentManager().beginTransaction()
                .add(R.id.activity_fragment_view, fragment)  
                .commit();
     getFragmentManager().beginTransaction().add(R.id.activity_fragment_view, fragment).commit();
    }
}

我的ViatgeDetallViewFragment是:

public class ViatgeDetallViewFragment extends Fragment implements …

我正在用指令启动一个进程

execl("./softCopia","softCopia",NULL);

softCopia只是一个在文件中写入整数的虚拟对象.

我想知道如何获得这个过程的pid？

我正在尝试在 android studio 中解析一个包含以下内容的 JSON：

"stops": 
[
    {
        "num": 1,
        "time": "2016-04-27T06:15:00.000Z",
        "title":"Flight to London",
        "desc":"Barcelona BCN-London-Gatwick LGW",
        "type":"0",
        "subtype":0
    },
    {
        "num": 2,
        "time": "2016-04-27T10:35:00.000Z",
        "title":"Gatwick express",
        "desc":"From Airport to London",
        "type":"0",
        "subtype":1
    },
    {
        "num": 3,
        "time": "2016-04-27T12:15:00.000Z",
        "title":"Pub the black horse",
        "desc":"From Airport to London",
        "type":1,
        "subtype":1,
        "location": "51.476334, -0.062700",
        "images": [                 "https://fitzrovianews.files.wordpress.com/2011/01/black_horse_rathbone_pl.jpg" 
        ]               
    },
    {
        "num": 4,
        "time": "2016-04-27T12:16:47.000Z",
        "title":"The Tower Bridge",
        "desc":"# The Tower Bridge Facts\n## Architecture\n**Tower Bridge** is a combined bascule and suspension bridge …

我正在使用netbeans,我创建了这个异常类:

public class VehicleException extends Exception{
    private String matricula;
    private Calendar dataMatricula;
    private ModelVehicle model;

    private int causa;

        public VehicleException(int causa, Object valor) throws Exception {
        this.causa = causa;
        switch (causa) {
            case 1:
                dataMatricula = (Calendar) valor;
                break;
            case 2:
                matricula = (String) valor;
                break;
            case 3:
                model = (ModelVehicle) valor;
                break;

            default:
                throw new Exception("Utilització errònia en construir VehicleException. Causa: " + causa);
        }
    }

         @Override
    public String getMessage() {
        switch (causa) {
            case 1:
                return "dataMatricula erroni: …