我正在一个Android应用程序上工作。我在Tab布局中有两个片段，两个片段都有带有自定义适配器的列表视图。片段一个加载列表，我想将片段1的列表视图的选定项添加到的列表视图中片段2.片段一个代码，我的适配器看起来像这样。
public class TestFragment2 extends Fragment{
TextView textView;
public ListView listView;
String text;
static YukilanAdapter yukilanAdapter;
private static List<YukilanModel> list = new ArrayList<YukilanModel>();
static OkHttpClient client;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
yukilanAdapter=new YukilanAdapter(list,getContext());
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_test2, container, false);
GetTask getTask=new GetTask();
getTask.execute();
listView=(ListView)rootView.findViewById(R.id.yukilanliste_view);
listView.setAdapter(yukilanAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
});
return rootView;
}
static class GetTask extends AsyncTask<String, Void, String> {
List<YukilanModel> gelenveri;
private Exception exception;
protected String doInBackground(String... urls) {
try {
ClientOlustur();
String getResponse = get("url");
return getResponse;
} catch (Exception e) {
this.exception = e;
return null;
}
}
protected void onPostExecute(String getResponse) {
try {
Log.d("TEST FRAGMENT2","EXECUTED");
JSONObject jsonObject = new JSONObject(getResponse);
JSONArray yukilanarray = jsonObject.getJSONArray("result");
gelenveri = new ArrayList<>();
for (int i = 0; i < yukilanarray.length(); i++) {
YukilanModel yeniilan = new YukilanModel();
JSONObject yukilanobject = yukilanarray.getJSONObject(i);
yeniilan.setSehir(yukilanobject.getString("a_sehir"));
yeniilan.setHedefsehir(yukilanobject.getString("hedef_sehir"));
yeniilan.setYukcins(yukilanobject.getString("yukcins"));
yeniilan.setAgirlik(yukilanobject.getString("agirlik"));
yeniilan.setArac(yukilanobject.getString("aractipi"));
/* if (yukilanobject.getString("yukcins").equals("sebze"))
{
yeniilan.setResim(getContext().getResources().getDrawable(R.drawable.sebze));
}*/
gelenveri.add(yeniilan);
}
} catch (Exception e) {
Log.d("error", e.toString());
return;
}
list.clear();
list.addAll(gelenveri);
yukilanAdapter.notifyDataSetChanged();
// listView.setAdapter(tazele);
}
public String get(String url) throws IOException {
Request request = new Request.Builder()
.url(url)
.build();
Response response = client.newCall(request).execute();
return response.body().string();
}
public void ClientOlustur() {
client = new OkHttpClient.Builder()
.authenticator(new Nakliyeauthenticator())
.build();
}
class Nakliyeauthenticator implements Authenticator {
//gets called if server responds with 401 http response to retry authentication
@Override
public Request authenticate(Route route, Response response) throws IOException {
String credential = Credentials.basic("user", "password");
//prevent infinite loop , if same credentials already tired, no need to try again
if (credential.equals(response.request().header("Authorization"))) {
return null;
}
return response.request().newBuilder()
.header("Authorization", credential)
.build();
}
}
}
@Override
public void onResume() {
super.onResume();
}
}
public class YukilanAdapter extends ArrayAdapter<YukilanModel> {
private static final String KEY_ADRES="Şehir: ";
private static final String KEY_TAKIPKODU="Takipkodu: ";
private static final String KEY_AGIRLIK="Ağırlık: ";
private static final String KEY_YUKCINS="Yukcins: ";
OkHttpClient client;
String gelennumara;
private List<YukilanModel> veriliste;
public YukilanAdapter(List<YukilanModel> veriliste, Context mContext) {
super(mContext, R.layout.ilanitem,veriliste);
this.veriliste = veriliste;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.ilanitem,null);
}
YukilanModel yukilan = veriliste.get(position);
if (yukilan != null) {
TextView a_adresview = (TextView) v.findViewById(R.id.sehir1);
TextView hedef_adres_view = (TextView) v.findViewById(R.id.sehir2);
TextView agirlikview = (TextView) v.findViewById(R.id.yuk);
TextView arac_view=(TextView) v.findViewById(R.id.arac);
View cizgi1=(View)v.findViewById(R.id.cizgi1);
View cizgi2=(View)v.findViewById(R.id.cizgi2);
a_adresview.setText(yukilan.getSehir());
hedef_adres_view.setText(yukilan.getHedefsehir());
agirlikview.setText(yukilan.getAgirlik());
arac_view.setText(yukilan.getArac());
if((arac_view.getText().toString()).equals("tır"))
{
cizgi1.setBackgroundColor(ContextCompat.getColor(getContext(), R.color.mavi));
}else
{
cizgi1.setBackgroundColor(ContextCompat.getColor(getContext(), R.color.kirmizi));
}
}
v.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String cins=getItem(position).getYukcins();
String sehir=getItem(position).getSehir();
String hedef=getItem(position).getHedefsehir();
String agirlik=getItem(position).getAgirlik();
Bundle bundle=new Bundle();
Intent newintent=new Intent(getContext(),Ilandetay.class);
bundle.putString("YUKCINS",cins);
bundle.putString("SEHIR",sehir);
bundle.putString("HEDEF",hedef);
bundle.putString("AGIRLIK",agirlik);
newintent.putExtras(bundle);
getContext().startActivity(newintent);
// Log.d("ON CLICK TEST",agirlik);
}
});
return v;
}
}
答案 0 :(得分：0)
创建一个自定义的回调接口。从一个片段的一个列表视图中调用此方法，然后在回调中传递选定的值。
现在在另一个片段中实现它以获取该值。
然后调用adapter.notifydatasetchanged（）函数以通知数据集更改。
您还可以访问此链接：