如何选择整个列表视图并提取整个内容？

Question

我的应用程序从手机的收件箱中读取消息并将其显示在应用程序的列表视图中。这些消息包含要在谷歌地图中显示的坐标。我已经可以一一提取内容，当我单击选定的列表视图行时，标记将显示在谷歌地图上。现在我想做的是，由于列表视图中有很多坐标，我希望能够一次性提取所有坐标并将其显示在谷歌地图上，所以它会在谷歌地图上显示很多标记，然后是 ill poly划线。我需要使用数组吗？我该怎么办？

这是我的主要活动代码：

public class MainActivity extends AppCompatActivity implements         OnClickListener {

//  GUI Widget
Button getSmsButton, viewGoogleMapButton;
TextView lblMsg, lblNumber;
ListView messageListView;
Context ctx = this;
String msg;
String lat, lng, latTag = "latTag", lngTag = "lngTag";
double latd, lngd;


// Cursor Adapter
SimpleCursorAdapter adapter;

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

    // Init GUI Widget
    getSmsButton = (Button) findViewById(R.id.getSmsButton);
    getSmsButton.setOnClickListener(this);

    messageListView = (ListView) findViewById(R.id.messageListView);


    viewGoogleMapButton = (Button) findViewById(R.id.viewGoogleMapButton);
    viewGoogleMapButton.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View view) {

            Intent startGoogleMap = new Intent(ctx, MapsActivity.class);
            startActivity(startGoogleMap);


        }

    });

    messageListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            //for getting the position
            String data=messageListView.getItemAtPosition(position).toString();

            //for getting the text from selected item
            TextView textView = (TextView) view.findViewById(R.id.lblMsg); //textView in your listView
            String text = textView.getText().toString();
            //Log.i("msg", text);

            String[] coordinate = text.split(", ");
            lat = coordinate[0];
            lng = coordinate[1];

            latd = Double.parseDouble(lat);
            lngd = Double.parseDouble(lng);

            Intent passVariable = new Intent(ctx, MapsActivity.class);
            passVariable.putExtra(latTag,latd);
            passVariable.putExtra(lngTag,lngd);
            startActivity(passVariable);
        }
    });

}

@Override
public void onClick(View v) {

    if (v == getSmsButton) {

        // Create Inbox box URI
        Uri inboxURI = Uri.parse("content://sms/inbox");

        // List required columns
        String[] reqCols = new String[]{"_id", "address", "body"};

        // Get Content Resolver object, which will deal with Content Provider
        ContentResolver cr = getContentResolver();


        // Fetch Inbox SMS Message from Built-in Content Provider
        Cursor c = cr.query(inboxURI, reqCols, null, null, null);

        // Attached Cursor with adapter and display in listview
        adapter = new SimpleCursorAdapter(this, R.layout.row, c,
                new String[]{"body", "address"}, new int[]{
                R.id.lblMsg, R.id.lblNumber});
        messageListView.setAdapter(adapter);



    }

}
}

这是我的谷歌地图活动代码：

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

private GoogleMap mMap;
String latTag = "latTag", lngTag = "lngTag";
double latd, lngd;
@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);
}


/**
 * Manipulates the map once available.
 * This callback is triggered when the map is ready to be used.
 * This is where we can add markers or lines, add listeners or move the camera. In this case,
 * we just add a marker near Sydney, Australia.
 * If Google Play services is not installed on the device, the user will be prompted to install
 * it inside the SupportMapFragment. This method will only be triggered once the user has
 * installed Google Play services and returned to the app.
 */
@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);

    Bundle extras = getIntent().getExtras();
    if (extras != null) {
        latd = extras.getDouble(latTag);
        lngd = extras.getDouble(lngTag);
    }

    // Add a marker in Singapore and move the camera
    LatLng singapore = new LatLng(latd, lngd);
    /*LatLng singapore0 = new LatLng(1.3347954, 103.7760273);
    LatLng singapore1 = new LatLng(1.3350862, 103.7765259);
    LatLng singapore2 = new LatLng(1.3347714, 103.776533);
    LatLng singapore3 = new LatLng(1.3345733, 103.776867);
    LatLng singapore4 = new LatLng(1.334255, 103.775617);
    LatLng singapore5 = new LatLng(1.333447, 103.7752314);
    LatLng singapore6 = new LatLng(1.332072, 103.774257);
    LatLng singapore7 = new LatLng(1.330976, 103.775757);
    LatLng singapore8 = new LatLng(1.332358, 103.777676);*/

    mMap.addMarker(new MarkerOptions().position(singapore).title("Marker in Singapore"));
    /*mMap.addMarker(new MarkerOptions().position(singapore0).title("Marker in Singapore"));
    mMap.addMarker(new MarkerOptions().position(singapore1).title("Marker in Singapore"));
    mMap.addMarker(new MarkerOptions().position(singapore2).title("Marker in Singapore"));
    mMap.addMarker(new MarkerOptions().position(singapore3).title("Marker in Singapore"));
    mMap.addMarker(new MarkerOptions().position(singapore4).title("Marker in Singapore"));
    mMap.addMarker(new MarkerOptions().position(singapore5).title("Marker in Singapore"));
    mMap.addMarker(new MarkerOptions().position(singapore6).title("Marker in Singapore"));
    mMap.addMarker(new MarkerOptions().position(singapore7).title("Marker in Singapore"));
    mMap.addMarker(new MarkerOptions().position(singapore8).title("Marker in Singapore"));*/

    mMap.addPolyline((new PolylineOptions())
            .add(singapore));
                    //singapore0, singapore1, singapore2, singapore3, singapore4, singapore5, singapore6, singapore7, singapore8));

    mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(singapore,16));
}

}

这是我的行 xml 文件代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="TextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/lblMsg"></TextView>

<TextView
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="TextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#00f"
android:id="@+id/lblNumber"></TextView>

</LinearLayout>

Answer 1

当我想绘制多个标记时，这就是我解决的方法。首先创建一个模型类来保存经纬度坐标，然后创建一个列表。这样：

    public class LatLong {

    private Double lat;
    private Double lng;
    private String name;
    private String address;

    /**
     *
     * @return
     * The lat
     */
    public Double getLat() {
        return lat;
    }

    /**
     *
     * @param lat
     * The lat
     */
    public void setLat(Double lat) {
        this.lat = lat;
    }

    /**
     *
     * @return
     * The lng
     */
    public Double getLng() {
        return lng;
    }

    /**
     *
     * @param lng
     * The lng
     */
    public void setLng(Double lng) {
        this.lng = lng;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public String getAddress()
    {
        return address;
    }

    public void setAddress(String address)
    {
        this.address = address;
    }

    }

然后在你的 MapsActivity 里面：

private List<LatLong> list_location;

然后将数据作为Parcelable 或以您自己喜欢的方式传递到此列表。获得数据后，这就是您绘制它的方式：

 @Override
public void onMapReady(GoogleMap map) {

    for(LatLong x:list_location)
    {
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(x.getLat(),x.getLng()), 15));
        map.addMarker(new MarkerOptions()
                .title(x.getName())
                .snippet(x.getAddress())
                .icon(BitmapDescriptorFactory.fromResource(R.drawable.dine))
                .position(new LatLng(x.getLat(),x.getLng())));
    }


    MapStyleOptions style = MapStyleOptions.loadRawResourceStyle(
            this, R.raw.style_json); // ignore this if you are not using the map with a custom design
    map.setMapStyle(style);
}