这个ListView类中，我在php和JSON调用的帮助下从服务器中引入了不同的元素到我的ListView。问题是，当我在listview上单击特定元素时，我想将元素的ID发送到另一个视图。在另一个视图中，我想发布关于我单击的元素的详细信息。你知道吗？
public class Forestillinger extends AppCompatActivity {
ListView dagensaktivitet;
TextView txt;
ArrayList<String> listItems = new ArrayList<String>();
ArrayAdapter<String> adapter;
JSONParser jsonParser = new JSONParser();
JSONObject hc = null;
JSONArray fstilling;
public String hk = "";
int success;
String msg;
final Context c = this;
StableArrayAdapter adb;
private static final String url_Forestillinger = "http://barnestasjonen.no/test/db_get_forestillinger.php";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_forestillinger);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
dagensaktivitet = (ListView) findViewById(R.id.forestillinglist);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, listItems) {
public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
TextView txt = (TextView) view.findViewById(android.R.id.text1);
txt.setTextColor(Color.WHITE);
return view;
}
};
dagensaktivitet.setAdapter(adapter);
Log.d("i oncreate", adapter.toString());
//if(!fromLocalDB())
try {
new getShows().execute().get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
//JSONObject tickets = task.getJSon();
adapter.notifyDataSetChanged();
dagensaktivitet.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent i = new Intent(getApplicationContext(), Forestilling.class);
i.putExtra("selectedItem", listItems.get(position));
startActivity(i);
}
});
}
public void fromExtDB() throws JSONException {
fstilling = hc.getJSONArray("forestillinger");
for (int i = 0; i < fstilling.length(); i++) {
listItems.add(fstilling.getJSONObject(i).getString("tittel")+fstilling.getJSONObject(i).getString("id"));
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_forestillinger, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void forestillingResult(){
new AlertDialog.Builder(Forestillinger.this)
.setTitle("OBS!!!")
.setMessage(msg)
.setCancelable(false)
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
hk = "";
finish();
}
})
.show();
}
private class StableArrayAdapter extends ArrayAdapter<String> {
HashMap<String, Integer> mIdMap = new HashMap<String, Integer>();
List<Integer> trialId;
public StableArrayAdapter(Context context, int textViewResourceId, List<String> objects, List<Integer> objectId) {
super(context, textViewResourceId, objects);
for (int i = 0; i < objects.size(); i++)
mIdMap.put(objects.get(i), i);
trialId = objectId;
}
public long getItemId(int position) {
String item = getItem(position);
return mIdMap.get(item);
}
public int getActualId(int position)
{
return trialId.get(position);
}
}
class getShows extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... args) {
Log.d("TEST", "jeg er her");
List<NameValuePair> params = new ArrayList<NameValuePair>();
//params.add(new BasicNameValuePair("id", "adam@gmail.com"));
//params.add(new BasicNameValuePair("type", "android"));
JSONObject json = jsonParser.makeHttpRequest(url_Forestillinger, "POST", params);
try {
if (json != null) {
success = Integer.parseInt(json.getString("success"));
msg = json.toString();
System.out.println("Vi er her:" + msg + " " + success);
}
if (success == 1) {
hc = json;
System.out.println("jojo"+json.toString());
}
else
{
msg=json.getString("message");
System.out.println(msg);
msg= Html.fromHtml(msg).toString();
hk = msg;
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
//run code
try {
Log.d("TAG23", "vi er in onpostExecute");
if(success == 1) {
fromExtDB();
}else{
forestillingResult();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
这是第二个视图。
public class Forestilling extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_forestilling);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
/*Bundle extras = getIntent().getExtras();
Log.d("TAG:", "" + extras.getInt("TryThis"));*/
Bundle extras = getIntent().getExtras();
String s = extras.getString("selectedItem");
Log.d("TAG:", "" + s);
TextView tit = (TextView)findViewById(R.id.tittel);
TextView dato = (TextView)findViewById(R.id.dato);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_forestilling, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
我现在不允许标记，但这可能与我如何使用listview中每行的textfield中的数字并调用该数字重复？
不管怎样，我在那里给出的答案可能会解决你的问题：
我是这样做的：
private class MyAdapter extends BaseAdapter {
private ListView listView;
...
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
this.listView = (ListView) viewGroup;
然后在每个View.OnClickListener中，我可以通过获得点击项目的位置
@Override
public void onClick(View view) {
...
MyAdapter.this.listView.getPositionForView((View) view.getParent()));