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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
public class Signin extends Activity {
EditText edt_mail, edt_password;
Button btn_login, btn_pass, btn_reg, btn_forget;
ImageView iv1, iv2;
String strmail, strpassword, strres;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.signin);
btn_forget = (Button) findViewById(R.id.btnforget);
edt_mail = (EditText) findViewById(R.id.edt_Username);
edt_password = (EditText) findViewById(R.id.edt_Password);
btn_login = (Button) findViewById(R.id.btnlogin);
btn_pass = (Button) findViewById(R.id.btncancel);
btn_reg = (Button) findViewById(R.id.btnReg);
iv1 = (ImageView) findViewById(R.id.imgfacebook);
iv2 = (ImageView) findViewById(R.id.imgtwitter);
btn_forget.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(Signin.this, ForgetPassword.class);
startActivity(intent);
}
});
iv2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(Signin.this, Twitter.class);
startActivity(intent);
}
});
iv1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(Signin.this, Facebook.class);
startActivity(intent);
}
});
btn_reg.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(Signin.this, Signup.class);
startActivity(intent);
}
});
btn_pass.setOnClickListener(new OnClickListener() {
public void onClick(View v) { // TODO Auto-generated method stub
cleartext();
}
public void cleartext() { // TODO Auto-generated method stub
edt_mail.setText("");
edt_password.setText("");
}
});
btn_login.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (!edt_mail.getText().toString().equals("")) {
if (!edt_password.getText().toString().equals("")) {
try {
if (CheckConnection()) {
// new GetAccess().execute("");
getLogin();
} else {
Toast.makeText(
Signin.this,
"Please check your internet connection",
Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
Toast.makeText(Signin.this,
"Error caught = " + e.toString(),
Toast.LENGTH_LONG).show();
}
} else {
Toast.makeText(Signin.this, "please enter Password",
Toast.LENGTH_LONG).show();
}
} else {
Toast.makeText(Signin.this, "please enter Username",
Toast.LENGTH_LONG).show();
}
}
private boolean CheckConnection() {
final ConnectivityManager conMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
final NetworkInfo activeNetwork = conMgr.getActiveNetworkInfo();
if (activeNetwork != null
&& activeNetwork.getState() == NetworkInfo.State.CONNECTED) {
// notify user you are online
// System.out.println("Internet connected = 1");
return true;
} else {
// notify user you are not online
// System.out.println("Internet not connected = 0");
Toast.makeText(getApplicationContext(),
"Please check your internet connection ",
Toast.LENGTH_SHORT).show();
return false;
}
}
});
}
public boolean CheckConnection() {
final ConnectivityManager conMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
final NetworkInfo activeNetwork = conMgr.getActiveNetworkInfo();
if (activeNetwork != null
&& activeNetwork.getState() == NetworkInfo.State.CONNECTED) {
// notify user you are online
// System.out.println("Internet connected = 1");
return true;
} else {
// notify user you are not online
System.out.println("Internet not connected = 0");
Toast.makeText(getApplicationContext(),
"Please check your internet connection ",
Toast.LENGTH_SHORT).show();
return false;
}
}
private void loadList() {
/*
* ArrayAdapter<String> adapter = new ArrayAdapter<String>(
* MainActivity.this, android.R.layout.simple_list_item_1, eventlist);
* view.setAdapter(adapter);
*/
Intent intent = new Intent(Signin.this, MainList.class);
startActivity(intent);
}
public void getLogin() {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(
"my link");
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
// nameValuePairs.add(new BasicNameValuePair("id", "12345"));
nameValuePairs.add(new BasicNameValuePair("email", edt_mail
.getText().toString().trim()));
nameValuePairs.add(new BasicNameValuePair("password", edt_password
.getText().toString().trim()));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse httpResponse = httpclient.execute(httppost);
HttpEntity entity = httpResponse.getEntity();
InputStream inputStream = entity.getContent();
// EntityUtils.toString(httpResponse.getEntity());
String strres = convertStreamToString(inputStream);
if (!strres.toString().trim().equals("0")) {
Toast.makeText(Signin.this, "Successfully logged in ",
Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Signin.this, NewMainList.class);
startActivity(intent);
}
else if (strres.toString().trim().equals("0")) {
Toast.makeText(Signin.this, "Invalid login and password",
Toast.LENGTH_SHORT).show();
}
System.out.println("Response = " + strres);
// username.setText("");
// password.setText("");// clear text box
} catch (ClientProtocolException e) {
System.out.println(e);
} catch (IOException e) {
System.out.println(e);
}
}
public String convertStreamToString(InputStream inputStream)
throws IOException {
if (inputStream != null) {
StringBuilder sb = new StringBuilder();
String line;
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream, "UTF-8"));
while ((line = reader.readLine()) != null) {
sb.append(line).append("\n");
}
} finally {
inputStream.close();
}
return sb.toString();
} else {
return "";
}
}
public class GetAccess extends AsyncTask<String, String, String> {
ProgressDialog dialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(Signin.this);
dialog.setTitle("Please wait");
dialog.setMessage("Getting login access");
dialog.show();
}
@Override
protected String doInBackground(String... params) {
getLogin();
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
dialog.dismiss();
setSession();
loadList();
// System.out.println(result);
}
private void setSession() {
SharedPreferences preferences = getSharedPreferences("CurrentUser",
MODE_WORLD_READABLE);
SharedPreferences.Editor editor = preferences.edit();
editor.putString("Save", edt_mail.getText().toString());
editor.putString("Save1", edt_password.getText().toString());
editor.putString("Save2", strres.toString().trim());
System.out.println("Response = " + strres);
editor.commit();
edt_mail.setText("");
edt_password.setText("");
}
}
}
注意:此代码在 android 2.3 模拟器和设备中完美运行。但是当我在 android 4.0 或更高版本中运行此代码时。它给我强制关闭错误。请帮忙解决这个问题。在 logcat 中，它显示 android.os.NetworkOnMainThreadException 错误。我该如何解决这个问题。？？？