如何使用Android json将listview itemclick图像显示到警报框中? [英] how to show listview itemclick image into the alertbox using android json?
本文介绍了如何使用Android json将listview itemclick图像显示到警报框中?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有ListView个项目来自带有图像的服务器，现在的问题是，如果我单击ListView中的任何项目，警报框将打开，并且在该警报框中该特定图像也应存在，例如我单击起司比萨饼，这样它将打开一个警告对话框，并且在该框中显示与ListView相同的图像.
这是我的子菜单活动:
public class SubMenu extends AppCompatActivity {
JSONObject jsonobject;
JSONArray jsonarray;
ListView listview;
ListViewAdapter adapter;
ProgressDialog mProgressDialog;
ArrayList<HashMap<String, String>> arraylist;
static String RANK = "id";
static String COUNTRY = "name";
static String FLAG = "image";
Integer i = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sub_menu);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
String SelectedId = getIntent().getStringExtra("id");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// Get the view from listview_main.xml
// Execute DownloadJSON AsyncTask
new DownloadJSON().execute();
}
// DownloadJSON AsyncTask
private class DownloadJSON extends AsyncTask<Void, Void, Void> implements AdapterView.OnItemClickListener {
// @Override
// protected void onPreExecute() {
// super.onPreExecute();
// Create a progressdialog
// mProgressDialog = new ProgressDialog(SubMenu.this);
// Set progressdialog title
// mProgressDialog.setTitle("Categories of Main categories.....");
// Set progressdialog message
// mProgressDialog.setMessage("Loading...");
// mProgressDialog.setIndeterminate(false);
// Show progressdialog
// mProgressDialog.show();
// }
@Override
protected Void doInBackground(Void... params) {
// Create an array
arraylist = new ArrayList<HashMap<String, String>>();
// Retrieve JSON Objects from the given URL address
jsonarray = JsonFunctions
.getJSONfromURL("http://cloud......com/broccoli/menu_typeitem.php?id=" + getIntent().getStringExtra("id"));
try {
// Locate the array name in JSON
// jsonarray = jsonobject.getJSONArray("main_menu_items");
for (int i = 0; i < jsonarray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
jsonobject = jsonarray.getJSONObject(i);
// Retrive JSON Objects
// map.put("id", jsonobject.getString("id"));
map.put("name", jsonobject.getString("name"));
map.put("image", jsonobject.getString("image"));
// Set the JSON Objects into the array
arraylist.add(map);
}
} catch (JSONException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void args) {
// Locate the listview in listview_main.xml
listview = (ListView) findViewById(R.id.list1);
// Pass the results into ListViewAdapter.java
adapter = new ListViewAdapter(SubMenu.this, arraylist);
// Set the adapter to the ListView
listview.setAdapter(adapter);
listview.setOnItemClickListener(this);
// Close the progressdialog
// mProgressDialog.dismiss();
}
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long rowId) {
final AlertDialog customDialog = new AlertDialog.Builder(SubMenu.this).create();
final LayoutInflater inflater = getLayoutInflater();
final View dialogView = inflater.inflate(R.layout.popup
, null);
customDialog.setView(dialogView);
// set the custom customDialogimation components - text, image and button
final TextView tvDistance = (TextView) dialogView.findViewById(R.id.h2);
// crust.setOnItemSelectedListener(this);
// public void addListenerOnSpinnerItemSelection() {
final Button ok = (Button) dialogView.findViewById(R.id.ok);
ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
customDialog.dismiss();
}
});
final Button cncl = (Button) dialogView.findViewById(R.id.canc);
cncl.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
customDialog.dismiss();
}
});
Button _decrease = (Button) dialogView.findViewById(R.id.incr);
Button _increase = (Button) dialogView.findViewById(R.id.decr);
Spinner spinner1 = (Spinner) dialogView.findViewById(R.id.crst);
Spinner spinner2 = (Spinner) dialogView.findViewById(R.id.adson);
ArrayList<String> alspinner1 = new ArrayList<>();
ArrayList<String> alspinner2 = new ArrayList<>();
final String[] _spvalue1 = getResources().getStringArray(R.array.Crust_array);
final String[] _spvalue2 = getResources().getStringArray(R.array.AddsOn_array);
for (int i = 0; i < _spvalue1.length; i++) {
alspinner1.add(_spvalue1[i]);
}
for (int i = 0; i < _spvalue2.length; i++) {
alspinner2.add(_spvalue2[i]);
}
ArrayAdapter<String> adapter1 = new ArrayAdapter<>(dialogView.getContext(), android.R.layout.simple_spinner_item, alspinner1);
ArrayAdapter<String> adapter2 = new ArrayAdapter<>(dialogView.getContext(), android.R.layout.simple_spinner_item, alspinner2);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter1);
spinner2.setAdapter(adapter2);
final TextView _value = (TextView) dialogView.findViewById(R.id.value);
i = Integer.parseInt(_value.getText().toString());
_decrease.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String _stringVal;
Log.d("src", "Decreasing value...");
if (i > 0) {
i = i - 1;
_stringVal = String.valueOf(i);
_value.setText(_stringVal);
} else {
Log.d("src", "Value can't be less than 0");
}
}
});
_increase.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String _stringVal;
Log.d("src", "Increasing value...");
i = i + 1;
_stringVal = String.valueOf(i);
_value.setText(_stringVal);
}
});
customDialog.show();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
图片应该放在此处， 演示图片 这是我的列表视图适配器:
public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context context;
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data;
ImageLoader imageLoader;
HashMap<String, String> resultp = new HashMap<String, String>();
public ListViewAdapter(Context context,
ArrayList<HashMap<String, String>> arraylist) {
this.context = context;
data = arraylist;
imageLoader = new ImageLoader(context);
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// Declare Variables
TextView id;
TextView name;
TextView population;
ImageView image;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.list_item1, parent, false);
// Get the position
resultp = data.get(position);
// Locate the TextViews in listview_item.xml
// id = (TextView) itemView.findViewById(R.id.idq);
name = (TextView) itemView.findViewById(R.id.type1);
// Locate the ImageView in listview_item.xml
image = (ImageView) itemView.findViewById(R.id.subimg);
// Capture position and set results to the TextViews
// id.setText(resultp.get(SubMenu.RANK));
name.setText(resultp.get(SubMenu.COUNTRY));
// Capture position and set results to the ImageView
// Passes flag images URL into ImageLoader.class
imageLoader.DisplayImage(resultp.get(SubMenu.FLAG), image);
// Capture ListView item click
/**itemView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// Get the position
resultp = data.get(position);
Intent intent = new Intent(context, SingleItemView.class);
// Pass all data rank
intent.putExtra("rank", resultp.get(MainActivity.RANK));
// Pass all data country
intent.putExtra("country", resultp.get(MainActivity.COUNTRY));
// Pass all data population
intent.putExtra("population",resultp.get(MainActivity.POPULATION));
// Pass all data flag
intent.putExtra("flag", resultp.get(MainActivity.FLAG));
// Start SingleItemView Class
context.startActivity(intent);
}
});*/
return itemView;
}
}
这是实际图像:
解决方案
如何使用Android将ListView ItemClick图像显示到警报框中 json?
onItemClick使用position从arraylist获取被点击的行HashMap:
HashMap<String, String> map =arraylist.get(position);
从地图中获取单击的行名和图像URL，并像在ListViewAdapter的getView()方法中一样在AlertDialog中显示它.
i am having ListView where items are coming from server with images, now the problem is that if i click any item from ListView the alertbox will open and in that alertbox that particular image should also be there for example if i click cheese pizza so it will open an alert dialog box and it will show the same image in that box which is in ListView.
here is my submenu activity:
public class SubMenu extends AppCompatActivity {
JSONObject jsonobject;
JSONArray jsonarray;
ListView listview;
ListViewAdapter adapter;
ProgressDialog mProgressDialog;
ArrayList<HashMap<String, String>> arraylist;
static String RANK = "id";
static String COUNTRY = "name";
static String FLAG = "image";
Integer i = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sub_menu);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
String SelectedId = getIntent().getStringExtra("id");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// Get the view from listview_main.xml
// Execute DownloadJSON AsyncTask
new DownloadJSON().execute();
}
// DownloadJSON AsyncTask
private class DownloadJSON extends AsyncTask<Void, Void, Void> implements AdapterView.OnItemClickListener {
// @Override
// protected void onPreExecute() {
// super.onPreExecute();
// Create a progressdialog
// mProgressDialog = new ProgressDialog(SubMenu.this);
// Set progressdialog title
// mProgressDialog.setTitle("Categories of Main categories.....");
// Set progressdialog message
// mProgressDialog.setMessage("Loading...");
// mProgressDialog.setIndeterminate(false);
// Show progressdialog
// mProgressDialog.show();
// }
@Override
protected Void doInBackground(Void... params) {
// Create an array
arraylist = new ArrayList<HashMap<String, String>>();
// Retrieve JSON Objects from the given URL address
jsonarray = JsonFunctions
.getJSONfromURL("http://cloud......com/broccoli/menu_typeitem.php?id=" + getIntent().getStringExtra("id"));
try {
// Locate the array name in JSON
// jsonarray = jsonobject.getJSONArray("main_menu_items");
for (int i = 0; i < jsonarray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
jsonobject = jsonarray.getJSONObject(i);
// Retrive JSON Objects
// map.put("id", jsonobject.getString("id"));
map.put("name", jsonobject.getString("name"));
map.put("image", jsonobject.getString("image"));
// Set the JSON Objects into the array
arraylist.add(map);
}
} catch (JSONException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void args) {
// Locate the listview in listview_main.xml
listview = (ListView) findViewById(R.id.list1);
// Pass the results into ListViewAdapter.java
adapter = new ListViewAdapter(SubMenu.this, arraylist);
// Set the adapter to the ListView
listview.setAdapter(adapter);
listview.setOnItemClickListener(this);
// Close the progressdialog
// mProgressDialog.dismiss();
}
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long rowId) {
final AlertDialog customDialog = new AlertDialog.Builder(SubMenu.this).create();
final LayoutInflater inflater = getLayoutInflater();
final View dialogView = inflater.inflate(R.layout.popup
, null);
customDialog.setView(dialogView);
// set the custom customDialogimation components - text, image and button
final TextView tvDistance = (TextView) dialogView.findViewById(R.id.h2);
// crust.setOnItemSelectedListener(this);
// public void addListenerOnSpinnerItemSelection() {
final Button ok = (Button) dialogView.findViewById(R.id.ok);
ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
customDialog.dismiss();
}
});
final Button cncl = (Button) dialogView.findViewById(R.id.canc);
cncl.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
customDialog.dismiss();
}
});
Button _decrease = (Button) dialogView.findViewById(R.id.incr);
Button _increase = (Button) dialogView.findViewById(R.id.decr);
Spinner spinner1 = (Spinner) dialogView.findViewById(R.id.crst);
Spinner spinner2 = (Spinner) dialogView.findViewById(R.id.adson);
ArrayList<String> alspinner1 = new ArrayList<>();
ArrayList<String> alspinner2 = new ArrayList<>();
final String[] _spvalue1 = getResources().getStringArray(R.array.Crust_array);
final String[] _spvalue2 = getResources().getStringArray(R.array.AddsOn_array);
for (int i = 0; i < _spvalue1.length; i++) {
alspinner1.add(_spvalue1[i]);
}
for (int i = 0; i < _spvalue2.length; i++) {
alspinner2.add(_spvalue2[i]);
}
ArrayAdapter<String> adapter1 = new ArrayAdapter<>(dialogView.getContext(), android.R.layout.simple_spinner_item, alspinner1);
ArrayAdapter<String> adapter2 = new ArrayAdapter<>(dialogView.getContext(), android.R.layout.simple_spinner_item, alspinner2);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter1);
spinner2.setAdapter(adapter2);
final TextView _value = (TextView) dialogView.findViewById(R.id.value);
i = Integer.parseInt(_value.getText().toString());
_decrease.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String _stringVal;
Log.d("src", "Decreasing value...");
if (i > 0) {
i = i - 1;
_stringVal = String.valueOf(i);
_value.setText(_stringVal);
} else {
Log.d("src", "Value can't be less than 0");
}
}
});
_increase.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String _stringVal;
Log.d("src", "Increasing value...");
i = i + 1;
_stringVal = String.valueOf(i);
_value.setText(_stringVal);
}
});
customDialog.show();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
here on top the image should come, thts a demo image here is my listview adapter:
public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context context;
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data;
ImageLoader imageLoader;
HashMap<String, String> resultp = new HashMap<String, String>();
public ListViewAdapter(Context context,
ArrayList<HashMap<String, String>> arraylist) {
this.context = context;
data = arraylist;
imageLoader = new ImageLoader(context);
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// Declare Variables
TextView id;
TextView name;
TextView population;
ImageView image;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.list_item1, parent, false);
// Get the position
resultp = data.get(position);
// Locate the TextViews in listview_item.xml
// id = (TextView) itemView.findViewById(R.id.idq);
name = (TextView) itemView.findViewById(R.id.type1);
// Locate the ImageView in listview_item.xml
image = (ImageView) itemView.findViewById(R.id.subimg);
// Capture position and set results to the TextViews
// id.setText(resultp.get(SubMenu.RANK));
name.setText(resultp.get(SubMenu.COUNTRY));
// Capture position and set results to the ImageView
// Passes flag images URL into ImageLoader.class
imageLoader.DisplayImage(resultp.get(SubMenu.FLAG), image);
// Capture ListView item click
/**itemView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// Get the position
resultp = data.get(position);
Intent intent = new Intent(context, SingleItemView.class);
// Pass all data rank
intent.putExtra("rank", resultp.get(MainActivity.RANK));
// Pass all data country
intent.putExtra("country", resultp.get(MainActivity.COUNTRY));
// Pass all data population
intent.putExtra("population",resultp.get(MainActivity.POPULATION));
// Pass all data flag
intent.putExtra("flag", resultp.get(MainActivity.FLAG));
// Start SingleItemView Class
context.startActivity(intent);
}
});*/
return itemView;
}
}
here is the actual image:
解决方案
how to show listview itemclick image into the alertbox using android json?
onItemClick use position to get clicked row HashMap from arraylist :
HashMap<String, String> map =arraylist.get(position);
Get clicked row name and image URL from map and show it in AlertDialog as doing in getView() method of ListViewAdapter
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