public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bt = (Button) findViewById(R.id.button2);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new MyasyncTask().execute("http://cdefgab.web.fc2.com/song.json");
}
});
}
// 下载JSON文体，解析为数组，自定义Adapter显示。
public class MyasyncTask extends AsyncTask<String, Integer, List<String>> {
@Override
protected List<String> doInBackground(String... params) {
InputStream is = null;
ByteArrayOutputStream baos = null;
List<String> data = null;
try {
URL url = new URL(params[0]);
HttpURLConnection huc = (HttpURLConnection) url.openConnection();
huc.setConnectTimeout(3000);
huc.setReadTimeout(3000);
huc.setDoInput(true);
huc.setRequestMethod("GET");
baos = new ByteArrayOutputStream();
if (huc.getResponseCode() == 200) {
is = huc.getInputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = is.read(buffer)) != -1) {
baos.write(buffer, 0, len);
}
JSONObject js = new JSONObject(baos.toString());
JSONObject js2 = js.getJSONObject("photos");
JSONArray ja1 = js2.getJSONArray("photo");
data = new ArrayList<String>();
for (int i = 0; i < ja1.length(); i++) {
JSONObject js3 = ja1.getJSONObject(i);
data.add(js3.getString("title"));
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return data;
}
@Override
protected void onPostExecute(final List<String> strings) {
super.onPostExecute(strings);
ListView lv = (ListView) findViewById(R.id.listview);
// lv.setAdapter(new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,strings));
mya m = new mya(strings);
m.notifyDataSetChanged();
lv.setAdapter(m);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, strings.get(position), Toast.LENGTH_SHORT).show();
}
});
}
}
public class mya extends BaseAdapter {
private List<String> temp;
public mya(List<String> temp) {
this.temp = temp;
}
@Override
public int getCount() {
return temp.size();
}
@Override
public Object getItem(int position) {
return temp.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = null;
if (convertView == null) {
view = LayoutInflater.from(MainActivity.this).inflate(R.layout.myadapter1, null);
} else {
view = convertView;
}
TextView tv = (TextView) view.findViewById(R.id.textView5);
tv.setText(temp.get(position));
return view;
}
}
}
