我有3个微调器，其中数据来自服务器，如果我们点击搜索按钮而不选择任何微调器然后在下一个活动，它应该显示所有列表（所有产品没有条件），但是如果我们根据3个微调器选择然后它应该只显示相关项目。我在点击搜索按钮时没有选择任何东西，但我没有在下一个活动中获得所选项目时获得所有项目。
这是我的搜索活动：
public class PMSearchActivity extends AppCompatActivity {
/**
* Id to identity READ_CONTACTS permission request.
*/
private static final int REQUEST_READ_CONTACTS = 0;
// UI references.
private AutoCompleteTextView mEmailView;
private EditText mPasswordView;
private View mProgressView;
private View mLoginFormView;
private ImageButton mtoolbar,pmplus;
private Button mpigeonSearchbtn;
private Spinner pmcountry;
private Spinner pmstrain;
private Spinner pmdistance;
private TextView error_text;
// distance part
ArrayList<String> listItems = new ArrayList<>();
ArrayAdapter<String> adapter;
ArrayList<String> listItems2 = new ArrayList<>();
ArrayAdapter<String> adapter2;
// distance part
ArrayList<String> listItems3 = new ArrayList<>();
ArrayAdapter<String> adapter3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pmsearch);
getSupportActionBar().hide();
pmplus = (ImageButton) findViewById(R.id.plus);
pmplus.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(PMSearchActivity.this, PMAddPigeonActivity.class);
startActivity(intent);
finish();
}
}) ;
mtoolbar = (ImageButton) findViewById(R.id.toolbar_new);
mtoolbar.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Intent intent = new Intent(PMSearchActivity.this, PMDashboardActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish(); //
return false;
}
});
mpigeonSearchbtn = (Button) findViewById(R.id.pmaddcompanybtn);
mpigeonSearchbtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
attemptLogin();
}
});
mLoginFormView = findViewById(R.id.login_form);
mProgressView = findViewById(R.id.login_progress);
pmcountry = (Spinner) findViewById(R.id.sname);
pmstrain = (Spinner) findViewById(R.id.fbcountry);
pmdistance = (Spinner) findViewById(R.id.pstrain);
error_text = (TextView) findViewById(R.id.error_text);
adapter = new ArrayAdapter<String>(this, R.layout.spinner_layout, R.id.txt, listItems);
pmstrain.setAdapter(adapter);
ListDistanceTask distanceTask = new ListDistanceTask();
distanceTask.execute();
adapter2 = new ArrayAdapter<String>(this, R.layout.spinner_layout, R.id.txt, listItems2);
pmdistance.setAdapter(adapter2);
ListStrainTask strainTask = new ListStrainTask();
strainTask.execute();
adapter3 = new ArrayAdapter<String>(this, R.layout.spinner_layout, R.id.txt, listItems3);
pmcountry.setAdapter(adapter3);
ListCountryTask listCountryTask = new ListCountryTask();
listCountryTask.execute();
}
private void attemptLogin() {
// Reset errors.
// mEmailView.setError(null);
//mPasswordView.setError(null);
// Store values at the time of the login attempt.
String PMcountry = pmcountry.getSelectedItem().toString();
String PMstrains = pmstrain.getSelectedItem().toString();
String PMdistance = pmdistance.getSelectedItem().toString();
boolean cancel = false;
View focusView = null;
// Check for a valid password, if the user entered one.
if (cancel) {
// There was an error; don't attempt login and focus the first
// form field with an error.
focusView.requestFocus();
}
Intent intent = new Intent(PMSearchActivity.this, PMPigeonListingActivity.class);
intent.putExtra("Country_name", PMcountry);
intent.putExtra("Strain_name", PMstrains);
intent.putExtra("Distance_name", PMdistance);
startActivity(intent);
}
public class ListStrainTask extends AsyncTask<Void, Void, Void> {
ArrayList<String> list;
protected ProgressDialog progressDialog;
;
ListStrainTask() {
}
@Override
protected Void doInBackground(Void... params) {
String result = "";
try {
list.add("-Select Strain-");
// Json coding
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(PMSearchActivity.this, "Please wait...", "Fetching data", true, false);
list = new ArrayList<>();
}
@Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems.addAll(list);
adapter.notifyDataSetChanged();
}
@Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
// listdistancetask
public class ListDistanceTask extends AsyncTask<Void, Void, Void> {
ArrayList<String> list;
protected ProgressDialog progressDialog;
;
ListDistanceTask() {
}
// Json coding
}
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(PMSearchActivity.this, "Please wait...", "Fetching data", true, false);
list = new ArrayList<>();
}
@Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems2.addAll(list);
adapter2.notifyDataSetChanged();
}
@Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
public class ListCountryTask extends AsyncTask<Void, Void, Void> {
ArrayList<String> list;
protected ProgressDialog progressDialog;
;
ListCountryTask() {
}
@Override
protected Void doInBackground(Void... params) {
String result = "";
try {
list.add("-Select Country-");
// Json coding
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(PMSearchActivity.this, "Please wait...", "Fetching data", true, false);
list = new ArrayList<>();
}
@Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems3.addAll(list);
adapter3.notifyDataSetChanged();
}
@Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
}
这里是PiegonListing活动：
public class PMPigeonListingActivity extends AppCompatActivity {
private Button mpigeonListBtn;
private ImageView mimg3;
private ImageButton mtoolbar;
private String PostCountry;
private String PostStrain;
private String PostDistance;
private Button listpigeonbutton;
private Spinner lsDistance;
private Spinner lsStrain;
private Spinner lsCountry;
private Button lssearchbutton;
private TextView listallbtn;
//Web api url
// distance part
ArrayList<String> listItems = new ArrayList<>();
ArrayAdapter<String> adapter;
ArrayList<String> listItems2 = new ArrayList<>();
ArrayAdapter<String> adapter2;
// distance part
ArrayList<String> listItems3 = new ArrayList<>();
ArrayAdapter<String> adapter3;
//Tag values to read from json
public static final String TAG_IMAGE_URL = "pimage";
public static final String TAG_NAME = "pprice";
public static final String TAG_PID = "pid";
public static final String TAG_PNAME = "pname";
public static final String TAG_PDETAILS = "pdetails";
public static final String TAG_MOBILE = "pmobile";
public static final String TAG_EMAIL = "pemail";
//GridView Object
private GridView gridView;
private GridView gridView2;
//ArrayList for Storing image urls and titles
private ArrayList<String> images;
private ArrayList<String> names;
private ArrayList<Integer> pid;
private ArrayList<String> pname;
private ArrayList<String> pdetails;
private ArrayList<String> pimage;
private ArrayList<String> pmobile;
private ArrayList<String> pemail;
//for inline search
private ArrayList<String> images2;
private ArrayList<String> names2;
private ArrayList<Integer> pid2;
private ArrayList<String> pname2;
private ArrayList<String> pdetails2;
private ArrayList<String> pimage2;
private ArrayList<String> pmobile2;
private ArrayList<String> pemail2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pmpigeon_listing);
getSupportActionBar().hide();
gridView = (GridView) findViewById(R.id.gridView);
gridView2 = (GridView) findViewById(R.id.gridView);
Bundle extras = getIntent().getExtras();
if (extras != null) {
PostCountry = extras.getString("Country_name");
PostStrain = extras.getString("Strain_name");
PostDistance = extras.getString("Distance_name");
}
images = new ArrayList<>();
names = new ArrayList<>();
pid = new ArrayList<>();
pname = new ArrayList<>();
pdetails = new ArrayList<>();
pmobile = new ArrayList<>();
pemail = new ArrayList<>();
images2 = new ArrayList<>();
names2 = new ArrayList<>();
pid2 = new ArrayList<>();
pname2 = new ArrayList<>();
pdetails2 = new ArrayList<>();
pmobile2 = new ArrayList<>();
pemail2 = new ArrayList<>();
lsStrain = (Spinner) findViewById(R.id.lsStrain);
lsDistance = (Spinner) findViewById(R.id.lsDistance);
lsCountry = (Spinner) findViewById(R.id.lsCountry);
lssearchbutton = (Button) findViewById(R.id.lssearchbutton);
listallbtn = (TextView) findViewById(R.id.listallbtn);
if (PostCountry.equals("Select Country") && PostStrain.equals("Select Strain") && PostDistance.equals("Select Distance")) {
listallbtn.setVisibility(View.GONE);
} else {
listallbtn.setVisibility(View.VISIBLE);
}
//Calling the getData method
getData();
mtoolbar = (ImageButton) findViewById(R.id.toolbar_new);
mtoolbar.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Intent intent = new Intent(PMPigeonListingActivity.this, PMDashboardActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish(); //
return false;
}
});
lssearchbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (lsCountry.getSelectedItemPosition() != 0 || lsStrain.getSelectedItemPosition() != 0 || lsDistance.getSelectedItemPosition() != 0) {
listallbtn.setVisibility(View.VISIBLE);
} else {
listallbtn.setVisibility(View.GONE);
}
images2.clear();
names2.clear();
pid2.clear();
pname2.clear();
pdetails2.clear();
pmobile2.clear();
pemail2.clear();
filter();
}
});
listallbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (lsCountry.getSelectedItemPosition() != 0 || lsStrain.getSelectedItemPosition() != 0 || lsDistance.getSelectedItemPosition() != 0) {
listallbtn.setVisibility(View.VISIBLE);
} else {
listallbtn.setVisibility(View.GONE);
}
lsCountry.setSelection(0);
lsStrain.setSelection(0);
lsDistance.setSelection(0);
images2.clear();
names2.clear();
pid2.clear();
pname2.clear();
pdetails2.clear();
pmobile2.clear();
pemail2.clear();
filter();
}
});
// button list
listpigeonbutton = (Button) findViewById(R.id.listpigeonbutton);
listpigeonbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(PMPigeonListingActivity.this, PMAddPigeonActivity.class);
startActivity(intent);
}
});
adapter = new ArrayAdapter<String>(this, R.layout.spinner_small, R.id.txt, listItems);
lsStrain.setAdapter(adapter);
ListDistanceTask distanceTask = new ListDistanceTask();
distanceTask.execute();
adapter2 = new ArrayAdapter<String>(this, R.layout.spinner_small, R.id.txt, listItems2);
lsDistance.setAdapter(adapter2);
ListStrainTask strainTask = new ListStrainTask();
strainTask.execute();
adapter3 = new ArrayAdapter<String>(this, R.layout.spinner_small, R.id.txt, listItems3);
lsCountry.setAdapter(adapter3);
ListCountryTask listCountryTask = new ListCountryTask();
listCountryTask.execute();
}
private void getData() {
//Showing a progress dialog while our app fetches the data from url
final ProgressDialog loading = ProgressDialog.show(this, "Please wait...", "Fetching data...", false, false);
String DATA_URL = "http://......searchPigeonList";
StringRequest stringRequest = new StringRequest(Request.Method.POST, DATA_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
//Toast.makeText(PMPigeonListingActivity.this,response,Toast.LENGTH_LONG).show();
loading.dismiss();
try {
JSONArray json = new JSONObject(response).getJSONArray("pigeon_list");
for (int i = 0; i < json.length(); i++) {
JSONObject obj = null;
try {
obj = json.getJSONObject(i);
pid.add(obj.getInt("id"));
pname.add(obj.getString("pigeon_name"));
pdetails.add(obj.getString("pigeon_details"));
pmobile.add(obj.getString("usr_mobile"));
pemail.add(obj.getString("usr_email"));
images.add(obj.getString("image"));
names.add(obj.getString("pigeon_price"));
} catch (JSONException e) {
e.printStackTrace();
}
}
}catch(JSONException je){
je.printStackTrace();
}catch(Exception e){
e.printStackTrace();
}
Log.d("Test",response);
//Creating GridViewAdapter Object
PMPigeonListAdapter pmpigeonlistadapter = new PMPigeonListAdapter(getApplicationContext(), images, names, pid, pdetails, pmobile, pemail, pname);
//Adding adapter to gridview
gridView.setAdapter(pmpigeonlistadapter);
pmpigeonlistadapter.notifyDataSetChanged();
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//Toast.makeText(PMPigeonListingActivity.this, error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("country", PostCountry);
params.put("strain", PostStrain);
params.put("distance", PostDistance);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
private void filter() {
//Showing a progress dialog while our app fetches the data from url
final ProgressDialog loading = ProgressDialog.show(this, "Please wait...", "Fetching data...", false, false);
String DATA_URL = "http://......hPigeonList";
final String lstrain = lsStrain.getSelectedItem().toString();
final String ldistance = lsDistance.getSelectedItem().toString();
final String lcountry = lsCountry.getSelectedItem().toString();
StringRequest stringRequest = new StringRequest(Request.Method.POST, DATA_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
//Toast.makeText(PMPigeonListingActivity.this,response,Toast.LENGTH_LONG).show();
loading.dismiss();
try {
JSONArray json = new JSONObject(response).getJSONArray("pigeon_list");
for (int i = 0; i < json.length(); i++) {
JSONObject obj = null;
try {
obj = json.getJSONObject(i);
pid2.add(obj.getInt("id"));
pname2.add(obj.getString("pigeon_name"));
pdetails2.add(obj.getString("pigeon_details"));
pmobile2.add(obj.getString("usr_mobile"));
pemail2.add(obj.getString("usr_email"));
images2.add(obj.getString("image"));
names2.add(obj.getString("pigeon_price"));
} catch (JSONException e) {
e.printStackTrace();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
//Creating GridViewAdapter Object
PMPigeonSearchInlineAdapter pmPigeonSearchInlineAdapter = new PMPigeonSearchInlineAdapter(getApplicationContext(), images2, names2, pid2, pdetails2, pmobile2, pemail2, pname2);
//Adding adapter to gridview
pmPigeonSearchInlineAdapter.notifyDataSetChanged();
gridView2.setAdapter(pmPigeonSearchInlineAdapter);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(PMPigeonListingActivity.this, error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params2 = new HashMap<String, String>();
params2.put("country", lcountry);
params2.put("strain", lstrain);
params2.put("distance", ldistance);
return params2;
}
};
RequestQueue requestQueue2 = Volley.newRequestQueue(this);
gridView2.setAdapter(null);
requestQueue2.add(stringRequest);
}
public class ListStrainTask extends AsyncTask<Void, Void, Void> {
// some coding
}
// listdistancetask
public class ListDistanceTask extends AsyncTask<Void, Void, Void> {
// some coding
}
@Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems2.addAll(list);
adapter2.notifyDataSetChanged();
ArrayAdapter<String> array_spinner = (ArrayAdapter<String>) lsDistance.getAdapter();
lsDistance.setSelection(array_spinner.getPosition(PostDistance));
}
@Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
public class ListCountryTask extends AsyncTask<Void, Void, Void> {
ArrayList<String> list;
protected ProgressDialog progressDialog;
;
ListCountryTask() {
}
@Override
protected Void doInBackground(Void... params) {
String result = "";
try {
list.add("Select Country");
// some coding
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(PMPigeonListingActivity.this, "Please wait...", "Fetching data", true, false);
list = new ArrayList<>();
}
@Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems3.addAll(list);
adapter3.notifyDataSetChanged();
ArrayAdapter<String> array_spinner = (ArrayAdapter<String>) lsCountry.getAdapter();
lsCountry.setSelection(array_spinner.getPosition(PostCountry));
}
@Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
}
在Pigeon列表活动中，有一个选项，例如搜索活动，用户可以在不选择任何项目的情况下进行搜索，就像在搜索活动中一样。
答案 0 :(得分：0)
为每个微调器设置侦听器
setOnItemSelectedListener
在onItemSelected方法中，获取变量中的选定值并将这些值传递给下一个活动。
E.g。
yourSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
String yourValue = yourSpinner.getSelectedItem().toString();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});