Question

我是Android开发人员的新手，我的自定义列表视图中存在问题，条件是当我点击我的列表视图时应该转到详细活动。是的，它的确有效！但细节数据和图像不会出现。只有 detail.xml ，没有数据和图片。

Ymainactivity.java

<div id="grid1" ui-grid="gridOptions" class="grid" ui-grid-grouping></div>

DetailActivity.java

private class GetData extends AsyncTask<String, Void, String> {     

    JSONArray str_json = null;
    JSONObject json = null;
     JSONParser jParser = new JSONParser();

    ListView listx;
    LazyAdapter adapter;
    ArrayList<HashMap<String, String>> data_map = new ArrayList<HashMap<String, String>>();

    ProgressDialog dialog = new ProgressDialog(YmainActivity.this);

     protected void onPreExecute() { 
         super.onPreExecute();
         this.dialog.setMessage("Memuat Item..");
         this.dialog.show();
     }

     protected String doInBackground(String... param) { 
         json = jParser.AmbilJson(link_url);

        try {
            str_json = json.getJSONArray("berita");

            for(int i = 0; i < str_json.length(); i++){
                JSONObject ar = str_json.getJSONObject(i);

                String kodebrg = "kode barang : "+ar.getString("kodebrg");
                String gambar = ar.getString("gambar2");
                String nama = ar.getString("nama");
                String stok = "Stok : "+ar.getString("stok")+" "+ar.getString("satauan");
                String harga = "Rp. "+ar.getString("harga")+" per "+ar.getString("satauan");
                String info = ar.getString("info");

                HashMap<String, String> map = new HashMap<String, String>();

                map.put(in_nama, nama);
                map.put(in_stok, stok);
                map.put(in_kodebrg, kodebrg);
                map.put(in_gambar, gambar);
                map.put(in_harga, harga);
                map.put(in_info, info);

                data_map.add(map);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null; 
        }

     protected void onPostExecute(String result) { 
         dialog.dismiss();          
         listx = (ListView)findViewById(R.id.listos);
         adapter = new LazyAdapter(YmainActivity.this, data_map); 

        listx.setAdapter(adapter);

        if (adapter.getCount()==0) {   
            Toast.makeText(YmainActivity.this,"data tidak ditemukan",Toast.LENGTH_SHORT).show();
            }

        listx.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,int position, long id) {

                HashMap<String, String> map = (HashMap<String, String>) adapter.getItem(position);

                String kodebrgs = ((TextView) view.findViewById(R.id.kodebrgs)).getText().toString();                               
                Intent inx = new Intent(YmainActivity.this, DetailActivity.class);
                inx.putExtra(kodebrgs, map2.get(in_kodebrg));
                startActivity(inx); 

     }

LazyAdapter.java

private class GetData extends AsyncTask<String, Void, String> {

    JSONArray artikel = null;
    JSONObject json = null;
    JSONParser jParser = new JSONParser();

    Intent ins = getIntent();
    String kode1s = ins.getStringExtra(in_kodebrg);
    String link_url = "http:// my php file that call all data using primary id from table in my database mySQL"+kode1s;

    ProgressDialog dialog = new ProgressDialog(DetailActivity.this);

     protected void onPreExecute() { 
         super.onPreExecute();
         this.dialog.setMessage("Memuat Detail Produk..");
         this.dialog.show();
     }
    protected String doInBackground(String... params) {

        json = jParser.AmbilJson(link_url);         
        return null;
    }

 protected void onPostExecute(String result) { 
     dialog.dismiss();  
        try {
            artikel = json.getJSONArray("artikel");

            for(int i = 0; i < artikel.length(); i++){
                JSONObject ar = artikel.getJSONObject(i);

                TextView judul1 = (TextView) findViewById(R.id.judul2);
                TextView detail1 = (TextView) findViewById(R.id.detail2);
                TextView isi1 = (TextView) findViewById(R.id.isi2);
                TextView info1 = (TextView) findViewById(R.id.infobarang2);
                TextView kodebarang1 = (TextView) findViewById(R.id.kodenyabrg2);

                String judul_1 = ar.getString("nama");
                String detail_1 = "harga Rp. "+ ar.getString("harga");
                String isi_1 = "Stok Barang : "+ ar.getString("stok")+" "+ar.getString("satauan");
                String info_1 = "Info : "+ar.getString("info");
                String kodebarang_1 = "Kode Barang : "+ar.getString(in_kodebrg);

                judul1.setText(judul_1);
                detail1.setText(detail_1);
                isi1.setText(isi_1);
                info1.setText(info_1);
                kodebarang1.setText(kodebarang_1);

            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
 }
}

这是我自定义的listiview pict

http://cdn.gudangimages.com/v1/2015/06/05/gambarlistview.png

这是详细的xml，当我点击我的自定义列表视图中的一个列表时，结果为空，没有数据和图像。

http://cdn.gudangimages.com/v1/2015/06/05/gambardetail.png

我不知道代码有什么问题，因为当我运行该程序时，它并没有强行关闭。

Answer 1

我认为问题出在inx.putExtra(kodebrgs, map2.get(in_kodebrg)); 你应该使用不会改变的密钥......

Intent i = new Intent(<currentActivity>.this,
                    <newactivity>.class);
            i.putExtra("ticket", ticket);
            i.putExtra("ticketid", tid);                                
            startActivity(i);

以及其他意图：

String ticketid = getIntent().getStringExtra("ticketid").toString();
String ticket = getIntent().getStringExtra("ticket").toString();

你也可以用不同的密钥发送每个字符串，并在密钥的帮助下获取详细信息。

Answer 2

首先，你需要调试detailActivity来找出getIntent（）是否有你想要的数据，如果你有，然后使用视图来包含这些数据，如果没有，你需要考虑是否onitemclicklistener没问题

无法在自定义列表视图中显示/发送数据和图像到详细信息活动

2 个答案: