Android AsyncTask HTTP POST - Printable Version

Android AsyncTask HTTP POST - Printable Version

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Android AsyncTask HTTP POST - crAyon - 07-26-2012

Code:
package com.example.t;

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.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.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class Action extends Activity {
	   private TextView textView;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_action);
		getActionBar().setDisplayHomeAsUpEnabled(false);
		Intent intent = getIntent();
		String user = intent.getStringExtra(Home.USER_NAME);
		String pass = intent.getStringExtra(Home.PASS_WORD);
		String dest = intent.getStringExtra(Home.END_POINT);
		download(dest, user, pass);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.activity_action, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case android.R.id.home:
			NavUtils.navigateUpFromSameTask(this);
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	public void download(String endpoint, String user, String pass) {
		getHTML task = new getHTML();
		task.execute(endpoint, user, pass);
		textView = (TextView) findViewById(R.id.textView1);
		textView.setText("User: "+ user +" Pass: "+ pass +" URL: "+ endpoint);
	}

	class getHTML extends AsyncTask<String, Integer, String> {
		@Override
		protected String doInBackground(String... params) {
			try {
				get_data(params[0], params[1], params[2]);
			} catch (IOException e) {
				e.printStackTrace();
			}
			return null;
	
		}

		protected void onPostExecute(String result) {
						
		}

	
	}
	
	public String get_data(String dest, String user, String pass) throws IOException{
		InputStream is = null;
		
	  try {    
		  HttpClient httpclient = new DefaultHttpClient();
		  HttpPost httppost = new HttpPost(dest);
		        try {
		            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(4);
		            nameValuePairs.add(new BasicNameValuePair("email", user));
		            nameValuePairs.add(new BasicNameValuePair("password", pass));
		            nameValuePairs.add(new BasicNameValuePair("do","user_login"));
		            nameValuePairs.add(new BasicNameValuePair("akey", "android_app"));
		            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
		            HttpResponse response;
		            Log.d("http", "Dest: " + dest);
		            Log.d("http", "User: " + user);
		            Log.d("http", "Pass: " + pass);
		            Log.d("http", "Device: " + System.currentTimeMillis());
		            response = httpclient.execute(httppost);
		            Boolean outp = request(response);
		            if(outp) {
		            	Log.i("auth", "Login Successful");
		            	return "0x00";
		            } else {
		            	Log.i("auth", "Login Failed with " + outp);
		            	return "0x01";
		            }
		        } catch (ClientProtocolException e) {
		            e.printStackTrace();
		        } catch (IOException e) {
		            e.printStackTrace();
		        }
		    } finally {
		        if (is != null) {
		            is.close();
		        } 
		    }
	return null;
	}
	
	public static Boolean request(HttpResponse response){
        String result = "";
        try{
            InputStream in = response.getEntity().getContent();
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));
            StringBuilder str = new StringBuilder();
            String line = null;
            while((line = reader.readLine()) != null){
                str.append(line);
            }
            in.close();
            result = str.toString();
            if(str.toString().equals("0")) {
            	return true;
            } else {
            	return false;
            }
        }catch(Exception ex){
            result = "Error";
        }
        return false;
    }
}

RE: Android AsyncTask HTTP POST - crAyon - 07-26-2012

Code:
package com.example.t;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import com.workfeed.beta.R;

public class Home extends Activity {
	public final static String PASS_WORD = "com.example.t.PASS_WORD";
	public final static String USER_NAME = "com.example.t.USER_NAME";
	public final static String END_POINT = "com.example.t.END_POINT";
	private EditText inputEmail;
	private EditText inputPassword;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
        
        if (getIntent().getBooleanExtra("EXIT", false)) {
       	 finish();
       	}
       
    }

    public void error(String error, String message) {
    	TextView nstatus = (TextView) findViewById(R.id.nstatus);
        nstatus.setTextSize(40);
        nstatus.setText(message);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_home, menu);
        return true;
    }

    public void startNet(View view) {
    	ConnectivityManager connMgr = (ConnectivityManager) 
    	        getSystemService(Context.CONNECTIVITY_SERVICE);
    	    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
    	    if (networkInfo != null && networkInfo.isConnected()) {
    	    	 Intent intent = new Intent(this, Action.class);
    	    	 inputEmail = (EditText) findViewById(R.id.email);
    	    	 inputPassword = (EditText) findViewById(R.id.password);
    	    	 String dest = "http://workfeed.co/core/wf_auth.php";
    	    	 String user = inputEmail.getText().toString();
    	    	 String pass = inputPassword.getText().toString();
    	    	 intent.putExtra(USER_NAME, user);
    	    	 intent.putExtra(PASS_WORD, pass);
    	    	 intent.putExtra(END_POINT, dest);
    	    	 startActivity(intent);
    	    } else {
    	    	TextView nstatus = (TextView) findViewById(R.id.nstatus);
    	        nstatus.setTextSize(40);
    	        nstatus.setText("No Network...");
    	    }
    	
    }
    
}

Code:
package com.example.t;

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.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.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Looper;
import android.support.v4.app.NavUtils;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

import com.workfeed.beta.R;

public class Action extends Activity {
	public TextView textView;
	public final static String USER_NAME = "com.example.t.USER_NAME";
	public final static String INVALID_PASS = "com.example.t.INVALID_PASS";
	static final int DIALOG_ERROR_LOGIN = 1;
	static final int DIALOG_OK_LOGIN = 2;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_action);
		getActionBar().setDisplayHomeAsUpEnabled(false);
		Intent intent = getIntent();
		String user = intent.getStringExtra(Home.USER_NAME);
		String pass = intent.getStringExtra(Home.PASS_WORD);
		String dest = intent.getStringExtra(Home.END_POINT);
		download(dest, user, pass);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.activity_action, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case android.R.id.home:
			NavUtils.navigateUpFromSameTask(this);
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	public void download(String endpoint, String user, String pass) {
		getHTML task = new getHTML();
		task.execute(endpoint, user, pass);
	}

	class getHTML extends AsyncTask<String, Integer, String> {
		@Override
		protected String doInBackground(String... params) {
			try {
				get_data(params[0], params[1], params[2]);
			} catch (IOException e) {
				e.printStackTrace();
			}
			return null;

		}

		protected void onPostExecute(String result) {

		}

	}

	public String get_data(String dest, String user, String pass)
			throws IOException {
		InputStream is = null;

		try {
			HttpClient httpclient = new DefaultHttpClient();
			HttpPost httppost = new HttpPost(dest);
			try {
				List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
						4);
				nameValuePairs.add(new BasicNameValuePair("email", user));
				nameValuePairs.add(new BasicNameValuePair("password", pass));
				nameValuePairs.add(new BasicNameValuePair("do", "user_login"));
				nameValuePairs
						.add(new BasicNameValuePair("akey", "android_app"));
				httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
				HttpResponse response;
				Log.d("http", "Dest: " + dest);
				Log.d("http", "User: " + user);
				Log.d("http", "Pass: " + pass);
				Log.d("http", "Device: " + System.currentTimeMillis());
				response = httpclient.execute(httppost);
				Boolean outp = request(response);
				if (outp) {
					Log.i("auth", "Login Successful");
					final Intent intent = new Intent(this, Workfeed.class);
					startActivity(intent);
					Action.this.finish();
					return "0x00";
				} else {
					Log.e("auth", "Login Failed with " + outp);
					fireAlert(1);
					return "0x01";
				}
			} catch (ClientProtocolException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
		} finally {
			if (is != null) {
				is.close();
			}
		}
		return null;
	}

	public void fireAlert(final Integer alertID) {
		Action.this.runOnUiThread(new Runnable() {
			public void run() {
				switch (alertID) {
				case 1:
					showDialog(DIALOG_ERROR_LOGIN);
					break;
				case 2:
					// do the work to define the game over Dialog
					break;
				}

			}
		});
	}

	public Dialog onCreateDialog(int id) {
		Dialog dialog;

		switch (id) {
		case DIALOG_ERROR_LOGIN:
			final Intent intent = new Intent(this, Home.class);
			AlertDialog.Builder builder = new AlertDialog.Builder(this);
			builder.setMessage("Error Logging In")
					.setCancelable(false)
					.setPositiveButton("Ok",
							new DialogInterface.OnClickListener() {
								public void onClick(DialogInterface dialog,
										int id) {
									startActivity(intent);
									Action.this.finish();
								}
							});
			AlertDialog alert = builder.create();
			return alert;
		case DIALOG_OK_LOGIN:

			break;
		default:
			dialog = null;
		}
		return null;
	}

	public static Boolean request(HttpResponse response) {
		@SuppressWarnings("unused")
		String result = "";
		try {
			InputStream in = response.getEntity().getContent();
			BufferedReader reader = new BufferedReader(
					new InputStreamReader(in));
			StringBuilder str = new StringBuilder();
			String line = null;
			while ((line = reader.readLine()) != null) {
				str.append(line);
			}
			in.close();
			result = str.toString();
			if (str.toString().equals("0")) {
				return true;
			} else {
				return false;
			}
		} catch (Exception ex) {
			result = "Error";
		}
		return false;
	}
}

Code:
package com.example.t;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;

import com.workfeed.beta.R;

public class Workfeed extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_workfeed);
        getActionBar().setDisplayHomeAsUpEnabled(false);
        TabHost tabHost=(TabHost)findViewById(R.id.tabHost);
        tabHost.setup();

        TabSpec spec1=tabHost.newTabSpec("Latest");
        spec1.setContent(R.id.tab1);
        spec1.setIndicator("Latest");

        TabSpec spec2=tabHost.newTabSpec("All");
        spec2.setIndicator("All");
        spec2.setContent(R.id.tab2);

        TabSpec spec3=tabHost.newTabSpec("Profile");
        spec3.setIndicator("Profile");
        spec3.setContent(R.id.tab3);

        tabHost.addTab(spec1);
        tabHost.addTab(spec2);
        tabHost.addTab(spec3);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_workfeed, menu);
        return true;
    }

    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                NavUtils.navigateUpFromSameTask(this);
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onBackPressed() {
    	Intent intent = new Intent(this, Home.class);
    	intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    	intent.putExtra("EXIT", true);
    	startActivity(intent);
    }
}