现在我可以解析来自 JSON 的数据 如何从 Listview 获取值 OnItemClickListener 并将其传递给另一个 Activity ？像这样/p>
这是我的代码
JSON 字符串
[
{
"project_id": "10",
"cat_id": "0",
"project_name": "BMW Showroom",
"project_status": "1",
"project_date": "2014-11-28",
"project_ordering": "1",
"project_start": "2014-11-28",
"project_finish": "2014-11-29",
"project_location": "Pattanakarn",
"project_pm": "11",
"project_foreman": "9",
"user_id": "9",
"user_fname": "Panya",
"user_lname": "Smunya",
"user_nickname": "Foreman4",
"user_address": "",
"user_email": "pan@gmail.com",
"user_pass": "12345",
"user_status": "1",
"user_dateregis": "2014-01-23",
"depart_id": "2",
"position": "Foreman"
},
{
"project_id": "9",
"cat_id": "1",
"project_name": "TRUE Big-C ",
"project_status": "1",
"project_date": "2014-11-28",
"project_ordering": "1",
"project_start": "2014-11-28",
"project_finish": "2014-11-29",
"project_location": "Nakhon Pathom",
"project_pm": "0",
"project_foreman": "6",
"user_id": "6",
"user_fname": "Tongdang",
"user_lname": "Boonlap",
"user_nickname": "Foreman1",
"user_address": "",
"user_email": "tong@gmail.com",
"user_pass": "12345",
"user_status": "1",
"user_dateregis": "2014-01-23",
"depart_id": "2",
"position": "Foreman"
},
{
"project_id": "8",
"cat_id": "1",
"project_name": "PTT Srinakarin",
"project_status": "1",
"project_date": "2014-11-08",
"project_ordering": "1",
"project_start": "2014-11-04",
"project_finish": "2014-12-31",
"project_location": "Srinakarin",
"project_pm": "10",
"project_foreman": "2",
"user_id": "2",
"user_fname": "Patcharin",
"user_lname": "Udsaha",
"user_nickname": "Patcha",
"user_address": "Bangkok",
"user_email": "p@gmail.com",
"user_pass": "12345",
"user_status": "3",
"user_dateregis": "2014-01-22",
"depart_id": "2",
"position": "Programmer"
},
{
"project_id": "6",
"cat_id": "1",
"project_name": "CIMB ",
"project_status": "1",
"project_date": "2014-01-23",
"project_ordering": "1",
"project_start": "2014-01-23",
"project_finish": "2014-08-15",
"project_location": "Sathon Branch",
"project_pm": "13",
"project_foreman": "7",
"user_id": "7",
"user_fname": "Apisit",
"user_lname": "Jannual",
"user_nickname": "Foreman2",
"user_address": "",
"user_email": "ap@gmail.com",
"user_pass": "12345",
"user_status": "1",
"user_dateregis": "2014-01-23",
"depart_id": "2",
"position": "Foreman"
}
]
PrePostActivity.java
public class PrePostActivity extends Activity {
private ListView listViewPost;
private ListView mListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_project);
listViewPost = (ListView) findViewById(R.id.listViewPost);
listViewPost.setOnItemClickListener(menuLsnr);
}
@Override
protected void onResume() {
super.onResume();
buildList();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
Intent i = new Intent(PrePostActivity.this, addProjectActivity.class);
startActivity(i);
return true;
}
if (id == R.id.feed) {
Intent i = new Intent(PrePostActivity.this, MainActivity.class);
startActivity(i);
return true;
}
return super.onOptionsItemSelected(item);
}
private void parseJson(String jsonStr){
try
{
// Our data is json array
JSONArray resultArray = new JSONArray(jsonStr);
// Array list stores each row data
// Array member is HashMap stores <col_name, col_value>
ArrayList<HashMap<String, String>> list_data
= new ArrayList<HashMap<String, String>>();
// Loop read each member of JSONArray
for(int i=0; i<resultArray.length(); i++)
{
JSONObject recordObj = resultArray.getJSONObject(i);
String project_id = recordObj.getString("project_id");
String project_name = recordObj.getString("project_name");
String project_location = recordObj.getString("project_location");
String foremanName = recordObj.getString("user_fname");
String foremanSur = recordObj.getString("user_lname");
// Create HashMap to store row values
HashMap<String, String> recordData =
new HashMap<String, String>();
recordData.put("project_name", project_name);
recordData.put("project_location","AREA: " + project_location + "| PM:" + foremanName + " " + foremanSur );
list_data.add(recordData);
}
// Load data from ArrayList list_data onto ListView
// List Entry Layout use Android's simple_list_item_2
String[] from = new String[]{"project_name", "project_location"};
int[] to = new int[]{android.R.id.text1, android.R.id.text2};
SimpleAdapter adapter = new SimpleAdapter(PrePostActivity.this,
list_data, android.R.layout.simple_list_item_2,
from, to);
listViewPost.setAdapter(adapter);
}
catch (Exception e)
{
Toast.makeText(PrePostActivity.this,
"JSON Format Error", Toast.LENGTH_LONG).show();
}
}
private AdapterView.OnItemClickListener menuLsnr =
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent();
intent.setClass(PrePostActivity.this, PostActivity.class);
intent.putExtra("position", position);
Toast.makeText(PrePostActivity.this,"Welcome ", Toast.LENGTH_LONG).show();
startActivity(intent);
}
};
//////////GET POST FROM SERVER //////////
private void buildList(){
getPostTask task = new getPostTask();
task.execute();
}
private class getPostTask extends AsyncTask<Void, Void,String> {
@Override
protected String doInBackground(Void... params) {
String url ="MY_JSON_URL";
HttpClient httpClient = new DefaultHttpClient();
HttpGet get = new HttpGet(url);
try
{
HttpResponse response = httpClient.execute(get);
HttpEntity response_entity= response.getEntity();
InputStream is = response_entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"),8);
StringBuilder sb = new StringBuilder();
String line =null;
while ((line = reader.readLine()) !=null){
sb.append(line+ "\n");
}
is.close();
return sb.toString();
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
if(s!=null){
parseJson(s);
}
//Toast.makeText(MainActivity.this,s,Toast.LENGTH_LONG).show();
}
}
}
最佳答案
您可以简单地在列表项点击时从 arraylist 中获取值
String project_name = list_data.get(position).get("project_name");
String project_location = list_data.get(position).get("project_location");
作为
传递给 Activity intent.putExtra("project_name ", project_name);
intent.putExtra("project_location ", project_location);
现在像在另一个 Activity 中一样检索
String projectname = getIntent().getStringExtra("project_name");
String project_location = getIntent().getStringExtra("project_location");
编辑:
public class PrePostActivity extends Activity {
private ListView listViewPost;
private ListView mListView;
ArrayList<HashMap<String, String>> list_data
= new ArrayList<HashMap<String, String>>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_project);
listViewPost = (ListView) findViewById(R.id.listViewPost);
listViewPost.setOnItemClickListener(menuLsnr);
}
private AdapterView.OnItemClickListener menuLsnr =
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
try {
String project_name = list_data.get(position).get("project_name");
String project_location = list_data.get(position).get("project_location");
Intent intent = new Intent();
intent.setClass(PrePostActivity.this, PostActivity.class);
// intent.putExtra("position", position);
intent.putExtra("project_name ", project_name);
intent.putExtra("project_location ", project_location);
Toast.makeText(PrePostActivity.this,"Welcome ", Toast.LENGTH_LONG).show();
startActivity(intent);
}catch (NullPointerException ex){
}
}
};
private void parseJson(String jsonStr){
try
{
// Our data is json array
JSONArray resultArray = new JSONArray(jsonStr);
// Loop read each member of JSONArray
for(int i=0; i<resultArray.length(); i++)
{
JSONObject recordObj = resultArray.getJSONObject(i);
String project_id = recordObj.getString("project_id");
String project_name = recordObj.getString("project_name");
String project_location = recordObj.getString("project_location");
String foremanName = recordObj.getString("user_fname");
String foremanSur = recordObj.getString("user_lname");
// Create HashMap to store row values
HashMap<String, String> recordData =
new HashMap<String, String>();
recordData.put("project_name", project_name);
recordData.put("project_location","AREA: " + project_location + "| PM:" + foremanName + " " + foremanSur );
list_data.add(recordData);
}
// Load data from ArrayList list_data onto ListView
// List Entry Layout use Android's simple_list_item_2
String[] from = new String[]{"project_name", "project_location"};
int[] to = new int[]{android.R.id.text1, android.R.id.text2};
SimpleAdapter adapter = new SimpleAdapter(PrePostActivity.this,
list_data, android.R.layout.simple_list_item_2,
from, to);
listViewPost.setAdapter(adapter);
}
catch (Exception e)
{
Toast.makeText(PrePostActivity.this,
"JSON Format Error", Toast.LENGTH_LONG).show();
}
}
关于android - 如何从 ListView 中获取值并将 JSON 数据传递给另一个 Activity，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27309727/