两天前我在here
提问我没有得到任何解决方案。现在我尝试了另一个例子。 MainActivity.java
public class MainActivity extends Activity {
String url;
private static final String TAG_RESULT = "predictions";
JSONObject json;
JSONArray contacts = null;
AutoCompleteTextView ed;
String[] search_text;
ArrayList<String> names;
ArrayAdapter<String> adp;
String browserKey="AIzaSyBdOTK4q66CloIbg1y71YSsy03yodXKxiI";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ed=(AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);
ed.setThreshold(0);
names=new ArrayList<String>();
ed.addTextChangedListener(new TextWatcher()
{
public void afterTextChanged(Editable s)
{
}
public void beforeTextChanged(CharSequence s, int start,
int count, int after)
{
}
public void onTextChanged(CharSequence s, int start,
int before, int count)
{
search_text= ed.getText().toString().split(",");
url="https://maps.googleapis.com/maps/api/place/autocomplete/json?input="+search_text[0]+"&location=37.76999,-122.44696&radius=500&sensor=true&key="+browserKey;
if(search_text.length<=1){
names=new ArrayList<String>();
Log.d("URL",url);
paserdata parse=new paserdata();
parse.execute();
}
}
});
}
public class paserdata extends AsyncTask<Void, Integer, Void>{
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
JSONParser jParser = new JSONParser();
// getting JSON string from URL
json = jParser.getJSONFromUrl(url.toString());
if(json !=null)
{
try {
// Getting Array of Contacts
contacts = json.getJSONArray(TAG_RESULT);
for(int i = 0; i < contacts.length(); i++){
JSONObject c = contacts.getJSONObject(i);
String description = c.getString("description");
Log.d("description", description);
names.add(description);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(Void result) {
adp = new ArrayAdapter<String>(getApplicationContext(),
android.R.layout.simple_list_item_1, names) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
TextView text = (TextView) view.findViewById(android.R.id.text1);
text.setTextColor(Color.BLACK);
return view;
}
};
ed.setAdapter(adp);
}
}
}
和
JSONParser.java
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
以上示例运行并没有给我任何建议。
这里我粘贴了我的LogCat跟踪
03-01 17:34:07.546: E/Buffer Error(6043): Error converting result java.lang.NullPointerException: lock == null
03-01 17:34:07.546: E/JSON Parser(6043): Error parsing data org.json.JSONException: End of input at character 0 of
03-01 17:34:07.835: D/URL(6043): https://maps.googleapis.com/maps/api/place/autocomplete/json?input=moda&location=37.76999,-122.44696&radius=500&sensor=true&key=AIzaSyBdOTK4q66CloIbg1y71YSsy03yodXKxiI
03-01 17:34:07.843: W/System.err(6043): java.net.UnknownHostException: Unable to resolve host "maps.googleapis.com": No address associated with hostname
03-01 17:34:07.843: W/System.err(6043): at java.net.InetAddress.lookupHostByName(InetAddress.java:424)
03-01 17:34:07.851: W/System.err(6043): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
03-01 17:34:07.851: W/System.err(6043): at java.net.InetAddress.getAllByName(InetAddress.java:214)
03-01 17:34:07.851: W/System.err(6043): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
03-01 17:34:07.851: W/System.err(6043): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
03-01 17:34:07.851: W/System.err(6043): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
03-01 17:34:07.851: W/System.err(6043): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
03-01 17:34:07.851: W/System.err(6043): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
03-01 17:34:07.851: W/System.err(6043): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
03-01 17:34:07.851: W/System.err(6043): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
03-01 17:34:07.851: W/System.err(6043): at com.example.autocompleted.JSONParser.getJSONFromUrl(JSONParser.java:38)
03-01 17:34:07.851: W/System.err(6043): at com.example.autocompleted.MainActivity$paserdata.doInBackground(MainActivity.java:83)
03-01 17:34:07.851: W/System.err(6043): at com.example.autocompleted.MainActivity$paserdata.doInBackground(MainActivity.java:1)
03-01 17:34:07.851: W/System.err(6043): at android.os.AsyncTask$2.call(AsyncTask.java:287)
03-01 17:34:07.851: W/System.err(6043): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
03-01 17:34:07.851: W/System.err(6043): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
03-01 17:34:07.851: W/System.err(6043): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
03-01 17:34:07.851: W/System.err(6043): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
03-01 17:34:07.851: W/System.err(6043): at java.lang.Thread.run(Thread.java:856)
03-01 17:34:07.851: W/System.err(6043): Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
03-01 17:34:07.859: W/System.err(6043): at libcore.io.Posix.getaddrinfo(Native Method)
03-01 17:34:07.859: W/System.err(6043): at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:59)
03-01 17:34:07.859: W/System.err(6043): at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
03-01 17:34:07.859: W/System.err(6043): ... 18 more
03-01 17:34:07.859: W/System.err(6043): Caused by: libcore.io.ErrnoException: getaddrinfo failed: ENETUNREACH (Network is unreachable)
03-01 17:34:07.859: W/System.err(6043): ... 21 more
03-01 17:34:07.859: E/Buffer Error(6043): Error converting result java.lang.NullPointerException: lock == null
03-01 17:34:07.859: E/JSON Parser(6043): Error parsing data org.json.JSONException: End of input at character 0 of
03-01 17:34:23.257: W/IInputConnectionWrapper(6043): getTextBeforeCursor on inactive InputConnection
03-01 17:34:23.273: W/IInputConnectionWrapper(6043): getCursorCapsMode on inactive InputConnection
03-01 17:34:23.312: W/IInputConnectionWrapper(6043): getCursorCapsMode on inactive InputConnection
我希望得到直接的帮助，因为我在过去的4天里被困在这一点
答案 0 :(得分：0)
你的代码非常好。
提出您的API请求：
https://maps.googleapis.com/maps/api/place/autocomplete/json?input=moda&location=37.76999,-122.44696&radius=500&sensor=true&key=AIzaSyBdOTK4q66CloIbg1y71YSsy03yodXKxiI
在REST客户端中取出此结果：
{
error_message: "The provided API key is expired."
predictions: [0]
status: "REQUEST_DENIED"
}
请注意在开始使用Place Autcomplete服务之前，您需要自己的Google Places API浏览器或服务器API密钥。请注意，Android API密钥不适用于地方自动填充服务。
请访问此link以获取浏览器的API密钥。
有关此部分的详细信息，请访问this页面的底部。