我想将Google电子表格数据添加到我的Android应用中。
我找了一些例子。
https://www.telerik.com/blogs/google-spreadsheet-as-data-source-android
这是我发现的样本。
它可以运行,但是当我将他的电子表格更改为我的电子表格时。
它会失败。
我不知道怎么了。
这是我的工作表: https://docs.google.com/spreadsheets/d/1pIj08MUjTNZscHbKkbJJ2eNR1RYlhJLW7qDrcWRnJMM/edit?usp=sharing
这是我的代码:
AsyncResult.java
interface AsyncResult
{ void onResult(JSONObject object);
}
DownloadWebpageTask.java
public class DownloadWebpageTask extends AsyncTask<String, Void, String> {
AsyncResult callback;
public DownloadWebpageTask(AsyncResult callback) {
this.callback = callback;
}
@Override
protected String doInBackground(String... urls) {
// params comes from the execute() call: params[0] is the url.
try {
return downloadUrl(urls[0]);
} catch (IOException e) {
return "Unable to download the requested page.";
}
}
// onPostExecute displays the results of the AsyncTask.
@Override
protected void onPostExecute(String result) {
// remove the unnecessary parts from the response and construct a JSON
int start = result.indexOf("{", result.indexOf("{") + 1);
int end = result.lastIndexOf("}");
String jsonResponse = result.substring(start, end);
try {
JSONObject table = new JSONObject(jsonResponse);
callback.onResult(table);
} catch (JSONException e) {
e.printStackTrace();
}
}
private String downloadUrl(String urlString) throws IOException {
InputStream is = null;
try {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000 /* milliseconds */);
conn.setConnectTimeout(15000 /* milliseconds */);
conn.setRequestMethod("GET");
conn.setDoInput(true);
// Starts the query
conn.connect();
int responseCode = conn.getResponseCode();
is = conn.getInputStream();
String contentAsString = convertStreamToString(is);
return contentAsString;
} finally {
if (is != null)
is.close();
}
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {}
return sb.toString();
}
}
Team.java
public class Team {
private String position;
public Team(String position)
{
this.setPosition(position);
}
public String getPosition() {
return position;
}
public void setPosition(String position) {
this.position = position;
}
}
TeamsAdapter.java
public class TeamsAdapter extends ArrayAdapter<Team> {
Context context;
private ArrayList<Team> teams;
public TeamsAdapter(Context context, int textViewResourceId, ArrayList<Team>
items) {
super(context, textViewResourceId, items);
this.context = context;
this.teams = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.team, null);
}
Team o = teams.get(position);
if (o != null) {
TextView pos = (TextView) v.findViewById(R.id.position);
pos.setText(String.valueOf(o.getPosition()));
}
return v;
}
}
mainactivity.java
public class MainActivity extends AppCompatActivity {
private static final String DEBUG_TAG = "HttpExample";
ArrayList<Team> teams = new ArrayList<Team>();
ListView listview;
Button btnDownload;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listview = (ListView) findViewById(R.id.listview);
btnDownload = (Button) findViewById(R.id.btnDownload);
ConnectivityManager connMgr = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected()) {
btnDownload.setEnabled(true);
} else {
btnDownload.setEnabled(false);
}
}
public void buttonClickHandler(View view) {
new DownloadWebpageTask(new AsyncResult() {
@Override
public void onResult(JSONObject object) {
processJson(object);
}
}).execute("https://spreadsheets.google.com/tq?
key=1pIj08MUjTNZscHbKkbJJ2eNR1RYlhJLW7qDrcWRnJMM");
}
private void processJson(JSONObject object) {
try {
JSONArray rows = object.getJSONArray("rows");
for (int r = 0; r < rows.length(); ++r) {
JSONObject row = rows.getJSONObject(r);
JSONArray columns = row.getJSONArray("c");
String position = columns.getJSONObject(0).getString("v");
Team team = new Team(position);
teams.add(team);
}
final TeamsAdapter adapter = new TeamsAdapter(this, R.layout.team,
teams);
listview.setAdapter(adapter);
} catch (JSONException e) {}
}
}
答案 0 :(得分:0)