通过HTTP GET验证登录信息:Android版 [英] Verifying login details via http get : Android
问题描述
我似乎有一个问题,通过HTTP GET验证用户登录信息:
下面是我的code:
公共静态无效的登录信息(用户名字符串,字符串密码){
HttpClient的HttpClient的=新DefaultHttpClient();
// prepare请求对象
HTTPGET HTTPGET =新HTTPGET(HTTP:// reallinkhere /登录/+ userName的
+/+密码); //执行请求
HTT presponse响应;
尝试{
响应= httpclient.execute(HTTPGET);
//检查响应状态
的System.out.println(response.getStatusLine()的toString()); //获取响应实体持有
HttpEntity实体= response.getEntity();
//如果响应未包封的实体,也没有必要
//担心连接释放 如果(实体!= NULL){ //一个简单的JSON响应读取
InputStream的河道= entity.getContent();
字符串结果= convertStreamToString(插播广告);
Log.i(TAG,结果); //一个简单的JSONObject创建
JSONObject的JSON =新的JSONObject(结果);
Log.i(TAG,<&JSONObject的GT; \\ n+ json.toString()+\\ n< / JSONObject的>); //一个简单的JSONObject解析
JSONArray nameArray = json.names();
JSONArray的valarray = json.toJSONArray(nameArray);
的for(int i = 0; I< valArray.length();我++)
{
Log.i(TAG,< jsonname+ I +> \\ n+ nameArray.getString(我)+\\ n< / jsonname+ I +> \\ N
+&下; jsonvalue+ I +> \\ N+ valArray.getString(I)+\\ N'下; / jsonvalue+ I +>中);
} //一个简单的JSONObject值推
json.put(样本键,采样值);
Log.i(TAG,<&JSONObject的GT; \\ n+ json.toString()+\\ n< / JSONObject的>); //关闭输入流会触发连接释放
instream.close();
}
}赶上(ClientProtocolException E){
// TODO自动生成catch块
e.printStackTrace();
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}赶上(JSONException E){
// TODO自动生成catch块
e.printStackTrace();
}}
和这里是我的logcat错误:
07-20 18:48:07.469:ERROR / AndroidRuntime(16013):致命异常:主要
java.lang.IllegalStateException:无法执行活动的方法
在android.view.View $ 1.onClick(View.java:3599)
在android.view.View.performClick(View.java:4204)
在android.view.View $ PerformClick.run(View.java:17355)
在android.os.Handler.handleCallback(Handler.java:725)
在android.os.Handler.dispatchMessage(Handler.java:92)
在android.os.Looper.loop(Looper.java:137)
在android.app.ActivityThread.main(ActivityThread.java:5041)
在java.lang.reflect.Method.invokeNative(本机方法)
在java.lang.reflect.Method.invoke(Method.java:511)
在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:793)
在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
在dalvik.system.NativeStart.main(本机方法)
java.lang.reflect.InvocationTargetException:产生的原因
在java.lang.reflect.Method.invokeNative(本机方法)
在java.lang.reflect.Method.invoke(Method.java:511)
在android.view.View $ 1.onClick(View.java:3594)
... 11更多
android.os.NetworkOnMainThreadException:产生的原因
在android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
在java.net.InetAddress.lookupHostByName(InetAddress.java:385)
在java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
在java.net.InetAddress.getAllByName(InetAddress.java:214)
在org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
在org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
在org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
在org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
在org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
在org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
在org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
在com.example.tempo.RestClient.login(RestClient.java:67)
在com.example.tempo.MainActivity.onClickLogin(MainActivity.java:31)
... 14个
我知道了reallinkhere是正确的,因为工作,当我去从浏览器我得到以下链接:
{ID:2,电子邮件:一,级别:3,第一:调试,最后:
测试,诞生:2013年7月19日,lastlogin:二零一三年七月二十日
十八点38分50秒,平衡:0.00}
此异常发生时,以往我们正在尝试在UI线程尝试网络操作。
公共类LongOperation扩展的AsyncTask<弦乐,太虚,字符串> { @覆盖
保护字符串doInBackground(字符串... PARAMS){
//通话功能
登录(用户名,密码);
返回null;
} @覆盖
保护无效onPostExecute(字符串结果){
} @覆盖
在preExecute保护无效(){
} @覆盖
保护无效onProgressUpdate(虚空......值){
}
}
如何执行任务:
新LongOperation()执行();
不要忘了将它添加到AndroidManifest.xml文件:
<使用许可权的android:NAME =android.permission.INTERNET对/>
另请参见下面链接的详细信息: -
<一个href=\"http://stackoverflow.com/questions/6343166/android-os-networkonmainthreadexception\">android.os.NetworkOnMainThreadException
<一个href=\"http://stackoverflow.com/questions/13136539/caused-by-android-os-networkonmainthreadexception\">Caused由:android.os.NetworkOnMainThreadException
I seem to be having a problem verifying user login details via http get:
Here is my code :
public static void login(String userName, String password) {
HttpClient httpclient = new DefaultHttpClient();
// Prepare a request object
HttpGet httpget = new HttpGet("http://reallinkhere/login/" + userName
+ "/" + password);
// Execute the request
HttpResponse response;
try {
response = httpclient.execute(httpget);
// Examine the response status
System.out.println(response.getStatusLine().toString());
// Get hold of the response entity
HttpEntity entity = response.getEntity();
// If the response does not enclose an entity, there is no need
// to worry about connection release
if (entity != null) {
// A Simple JSON Response Read
InputStream instream = entity.getContent();
String result= convertStreamToString(instream);
Log.i(TAG,result);
// A Simple JSONObject Creation
JSONObject json=new JSONObject(result);
Log.i(TAG,"<jsonobject>\n"+json.toString()+"\n</jsonobject>");
// A Simple JSONObject Parsing
JSONArray nameArray=json.names();
JSONArray valArray=json.toJSONArray(nameArray);
for(int i=0;i<valArray.length();i++)
{
Log.i(TAG,"<jsonname"+i+">\n"+nameArray.getString(i)+"\n</jsonname"+i+">\n"
+"<jsonvalue"+i+">\n"+valArray.getString(i)+"\n</jsonvalue"+i+">");
}
// A Simple JSONObject Value Pushing
json.put("sample key", "sample value");
Log.i(TAG,"<jsonobject>\n"+json.toString()+"\n</jsonobject>");
// Closing the input stream will trigger connection release
instream.close();
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
and here is my logcat errors:
07-20 18:48:07.469: ERROR/AndroidRuntime(16013): FATAL EXCEPTION: main
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:3599)
at android.view.View.performClick(View.java:4204)
at android.view.View$PerformClick.run(View.java:17355)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at android.view.View$1.onClick(View.java:3594)
... 11 more
Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
at java.net.InetAddress.getAllByName(InetAddress.java:214)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
at com.example.tempo.RestClient.login(RestClient.java:67)
at com.example.tempo.MainActivity.onClickLogin(MainActivity.java:31)
... 14 more
i know the "reallinkhere" is correct and working as when i go to the link from the browser i get the following :
{"id":"2","email":"a","level":"3","first":"debug","last":
"test","birth":"2013-07-19","lastlogin":"2013-07-20
18:38:50","balance":"0.00"}
This exception occur when ever we are try to attempt network operation on UI thread.
public class LongOperation extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
// call function
login(userName, password);
return null;
}
@Override
protected void onPostExecute(String result) {
}
@Override
protected void onPreExecute() {
}
@Override
protected void onProgressUpdate(Void... values) {
}
}
How to execute the task:
new LongOperation().execute();
Don't forget to add this to AndroidManifest.xml file:
<uses-permission android:name="android.permission.INTERNET"/>
Also see below link to more info:-
android.os.NetworkOnMainThreadException
Caused by: android.os.NetworkOnMainThreadException
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