Android用xml中的另一个线性布局替换线性布局

Question

我正在创建一个应用程序，其中包含上面的地图和下面国家/地区的列表视图。当用户单击列表中的数据时，带有列表的布局将被替换并成为国家/地区的配置文件，上面的地图将会粘贴。你能否建议一种覆盖列表布局的方法，并将其替换为国家/地区的个人资料。具有id = layout的linearlayout将替换为由国家/地区的配置文件组成的布局

  

MainActivity

public class MainActivity extends AppCompatActivity implements LocationListener {

    GoogleMap map;

    List<CountryModel> GetCountry;
    Context context = this;
    DatabaseHelper dbhelper;
    DatabaseHelper db = new DatabaseHelper(this);
    ListView lv;

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

        dbhelper = new DatabaseHelper(MainActivity.this);

        try{
            dbhelper.createDataBase();
        }
        catch(IOException e){
            e.printStackTrace();
        }
        try {
            dbhelper.openDataBase();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        GetCountry = dbhelper.getCountry();
        lv = (ListView) findViewById(R.id.listView);
        lv.setAdapter(new ViewAdapter());

        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

                LatLng latlngtofocus = new LatLng(Double.parseDouble(GetCountry.get(i).getlatitude()),  Double.parseDouble(GetCountry.get(i).getlongitude()));

                map.animateCamera(CameraUpdateFactory.newLatLngZoom(latlngtofocus, 17.0f));

                MarkerOptions markerOptions = new MarkerOptions();
                markerOptions.position(latlngtofocus);
                //adding marker to the map
                map.addMarker(markerOptions);




            }
        });



        //To get MapFragment reference from xml layout
        MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);

        //To get map object
        map = mapFragment.getMap();
        map.getUiSettings().setZoomControlsEnabled(true);

       /* //to show current location in the map
        map.setMyLocationEnabled(true);

        map.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
            @Override
            public void onMapClick(LatLng latLng) {

                Toast.makeText(getApplicationContext(), latLng.toString(), Toast.LENGTH_LONG).show();
            }
        });*/

        //To setup location manager
        LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        //To request location updates
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1, 1, this);

    }


    @Override
    public void onLocationChanged(Location location) {

        //To clear map data
        map.clear();

        //To hold location
        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());

        //To create marker in map
        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(latLng);
        markerOptions.title("My Location");
        //adding marker to the map
        map.addMarker(markerOptions);

        //opening position with some zoom level in the map
        map.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 17.0f));
    }

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

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }

    /****************************************************************************************
     *                                      CUSTOM LIST
     ****************************************************************************************/
    public class ViewAdapter extends BaseAdapter {

        LayoutInflater mInflater;

        public ViewAdapter() {
            mInflater = LayoutInflater.from(context);
        }

        @Override
        public int getCount() {
            return GetCountry.size();
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {

            if (convertView == null) {
                convertView = mInflater.inflate(R.layout.item_country,null);
            }

            final TextView country = (TextView) convertView.findViewById(R.id.country);
            final TextView latitude = (TextView) convertView.findViewById(R.id.latitude);
            final TextView longitude = (TextView) convertView.findViewById(R.id.longitude);

            country.setText(GetCountry.get(position).getcountry());
            latitude.setText(GetCountry.get(position).getlatitude());
            longitude.setText(GetCountry.get(position).getlongitude());

            return convertView;
        }
    }
}

  

activity_main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:name="com.google.android.gms.maps.MapFragment"
        />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/layout">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/listView"
        android:layout_gravity="center_horizontal" />

    </LinearLayout>

</LinearLayout>

  

已编辑的主要活动

public class MainActivity extends AppCompatActivity implements LocationListener {

    GoogleMap map;

    List<CountryModel> GetCountry;
    Context context = this;
    DatabaseHelper dbhelper;
    DatabaseHelper db = new DatabaseHelper(this);
    ListView lv;
    View yourListView,yourProfileView;



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

        dbhelper = new DatabaseHelper(MainActivity.this);

        try{
            dbhelper.createDataBase();
        }
        catch(IOException e){
            e.printStackTrace();
        }
        try {
            dbhelper.openDataBase();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        GetCountry = dbhelper.getCountry();
        lv = (ListView) findViewById(R.id.listView);
        lv.setAdapter(new ViewAdapter());

        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

                LatLng latlngtofocus = new LatLng(Double.parseDouble(GetCountry.get(i).getlatitude()),  Double.parseDouble(GetCountry.get(i).getlongitude()));

                map.animateCamera(CameraUpdateFactory.newLatLngZoom(latlngtofocus, 17.0f));

                MarkerOptions markerOptions = new MarkerOptions();
                markerOptions.position(latlngtofocus);
                //adding marker to the map
                map.addMarker(markerOptions);


                View yourListView = findViewById(R.id.layout);
                ViewGroup parent = (ViewGroup) yourListView.getParent();
                parent.removeView(yourListView);
                // inflate your profile view (or get the reference to it if it's already inflated)
                View yourProfileView = getLayoutInflater().inflate(R.layout.profile_country, parent, false);
                // add it to the parent
                parent.addView(yourProfileView);

            }


        });



        //To get MapFragment reference from xml layout
        MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);

        //To get map object
        map = mapFragment.getMap();
        map.getUiSettings().setZoomControlsEnabled(true);

       /* //to show current location in the map
        map.setMyLocationEnabled(true);

        map.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
            @Override
            public void onMapClick(LatLng latLng) {

                Toast.makeText(getApplicationContext(), latLng.toString(), Toast.LENGTH_LONG).show();
            }
        });*/

        //To setup location manager
        LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        //To request location updates
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1, 1, this);

    }


    @Override
    public void onLocationChanged(Location location) {

        //To clear map data
        map.clear();

        //To hold location
        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());

        //To create marker in map
        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(latLng);
        markerOptions.title("My Location");
        //adding marker to the map
        map.addMarker(markerOptions);

        //opening position with some zoom level in the map
        map.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 17.0f));
    }

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

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }

    /****************************************************************************************
     *                                      CUSTOM LIST
     ****************************************************************************************/
    public class ViewAdapter extends BaseAdapter {

        LayoutInflater mInflater;

        public ViewAdapter() {
            mInflater = LayoutInflater.from(context);
        }

        @Override
        public int getCount() {
            return GetCountry.size();
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {

            if (convertView == null) {
                convertView = mInflater.inflate(R.layout.item_country,null);
            }

            final TextView country = (TextView) convertView.findViewById(R.id.country);
            final TextView latitude = (TextView) convertView.findViewById(R.id.latitude);
            final TextView longitude = (TextView) convertView.findViewById(R.id.longitude);

            country.setText(GetCountry.get(position).getcountry());
            latitude.setText(GetCountry.get(position).getlatitude());
            longitude.setText(GetCountry.get(position).getlongitude());

            return convertView;
        }
    }

    @Override
    public void onBackPressed() {
        if(yourProfileView != null && yourProfileView.getVisibility() == View.VISIBLE) {
            // remove your profile view
            ViewGroup parent = (ViewGroup) yourListView.getParent();
            parent.removeView(yourProfileView);

            // a reference to yourListView has to be saved somewhere; just get it

            // add your listview to the parent
            parent.addView(yourListView);
        } else {
            super.onBackPressed();
        }
    }

}

Answer 1

最简单的方法可能是将一个视图替换为另一个视图：

// remove your listview
View yourListView = findViewById(R.id.listview);
ViewGroup parent = (ViewGroup) yourListView.getParent();
parent.removeView(yourListView);
// inflate your profile view (or get the reference to it if it's already inflated)
View yourProfileView = getLayoutInflater().inflate(R.layout.profile_view, parent, false);
// add it to the parent
parent.addView(yourProfileView);

另一种方法是使用片段。见卡勒姆的回答

修改

对于您的情况，最好的方法是使用碎片，但如果您的时间非常短，请尝试以下方法：

@Override
public void onBackPressed() {
    if(yourProfileView != null && yourProfileView.getParent() != null) {
        // remove your profile view
        ViewGroup parent = (ViewGroup) yourProfileView.getParent();
        parent.removeView(yourProfileView);

        // a reference to yourListView has to be saved somewhere; just get it

        // add your listview to the parent
        parent.addView(yourListView);
    } else {
        super.onBackPressed();
    }
}

Answer 2

您是否尝试过使用2 Fragment？您的ListView与您的contries列表是第一个，国家的详细信息是第二个。然后，您可以随意显示/隐藏片段（在您选择项目时隐藏ListView片段并显示详细信息）。

编辑：由于OP正在寻找其他选择：

其他解决方案是使用视图可见性。您不需要从布局中删除ListView，只需显示国家/地区详细信息即可隐藏它。因此，将布局设置为包含ListView的FrameLayout和包含国家/地区详细信息的View。默认情况下，将详细信息视图可见性设置为已消失，当您在列表中选择元素时，将其设置为可见。当ListView可见性消失时，添加反向行为onBackPressed()。

但如果我是你，我仍然会去寻找碎片。

Answer 3

有一个很好的课程可以帮助您在名为ViewSwitcher

的2个布局之间切换

您的布局可能如下所示：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

  <fragment
      android:id="@+id/map"
      android:layout_width="match_parent"
      android:layout_height="250dp"
      android:name="com.google.android.gms.maps.MapFragment"
      />

  <ViewSwitcher
      android:layout_width="wrap_content"
      android:layout_height="match_parent"
      android:id="@+id/viewSwitcher">

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal" />

    <FrameLayout
        android:id="@+id/profile_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        >

      <!-- Detailed fields here -->

    </FrameLayout>

  </ViewSwitcher>

</LinearLayout>

单击列表中的元素时，调用viewSwitcher.showNext（）。如果你想回到列表，请再次调用它。希望它有所帮助。

Answer 4

再添加一个片段以显示个人资料。单击列表视图时，将信息加载到Fragment组件。