The great unknown GRADLE

Thanks God, André is enlightening us http://andreborud.com/android-studio-automatic-incremental-gradle-versioning

FUCK HTTPS

How to use Markdown to edit Blogger posts

Written with StackEdit.

this is the new platform I’ve found to publish with markdown.

via: http://blog.g14n.info/2013/12/how-to-use-markdown-to-edit-blogger.html#publish-on-blogger

Changing Menu Icons and the Drawer layout Icon depending the Theme

First generate the attrs.xml in values folder:

<resources>
    <declare-styleable name="customAttrs">
        <attr name="customUserInfoIcon" format="reference" />
        <attr name="customDrawerLayoutIcon" format="reference" />
        <attr name="customInfoDetailsIcon" format="reference" />
    </declare-styleable>
</resources>

Second generate your diferent styles:

    <style name="REDAppTheme" parent="AppTheme">
        <item name="android:actionBarStyle">@style/REDActionBar</item>
        <item name="customUserInfoIcon">@drawable/ic_action_userinfo_black</item>
        <item name="customDrawerLayoutIcon">@drawable/ic_drawer_black</item>
        <item name="customInfoDetailsIcon">@drawable/ic_action_info_details_black</item>
    </style>

    <style name="REDActionBar" parent="@android:style/Widget.Holo.Light.ActionBar">
        <item name="android:background">@color/vbz_red</item>
        <item name="android:titleTextStyle">@style/RED.ActionBar.TitleTextStyle</item>
        <item name="android:icon">@drawable/icon_red</item>
    </style>

    <style name="RED.ActionBar.TitleTextStyle" parent="@android:style/TextAppearance.Holo.Widget.ActionBar.Title">
        <item name="android:textColor">@color/black</item>
    </style>

    <style name="BLUEAppTheme" parent="AppTheme">
        <item name="android:actionBarStyle">@style/BLUEActionBar</item>
        <item name="customUserInfoIcon">@drawable/ic_action_userinfo_white</item>
        <item name="customDrawerLayoutIcon">@drawable/ic_drawer_white</item>
        <item name="customInfoDetailsIcon">@drawable/ic_action_info_details_white</item>
    </style>

    <style name="BLUEActionBar" parent="@android:style/Widget.Holo.Light.ActionBar">
        <item name="android:background">@color/vbz_blue</item>
        <item name="android:titleTextStyle">@style/BLUE.ActionBar.TitleTextStyle</item>
        <item name="android:icon">@drawable/icon</item>
    </style>

    <style name="BLUE.ActionBar.TitleTextStyle" parent="@android:style/TextAppearance.Holo.Widget.ActionBar.Title">
        <item name="android:textColor">@color/white</item>
    </style>

Then you can use the different icons in your menu depending of the style you have chosen:

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/userinfo"
        android:orderInCategory="100"
        android:showAsAction="always"
        android:title="@string/userinfo"
        android:icon="?attr/customUserInfoIcon"/>

     <item
        android:id="@+id/info"
        android:orderInCategory="100"
        android:showAsAction="always"
        android:title="@string/info"
        android:icon="?attr/customInfoDetailsIcon"/>

</menu>

And for the drawer layout you have to get the referenced Id and put it in the ActionBarDrawerToggle constructor:

    TypedArray a = getTheme().obtainStyledAttributes(R.style.AppTheme, new int[] {R.attr.customDrawerLayoutIcon});     
    int attributeResourceId = a.getResourceId(0, 0);

    // ActionBarDrawerToggle ties together the the proper interactions
    // between the sliding drawer and the action bar app icon
    drawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
    drawerLayout, /* DrawerLayout object */
    attributeResourceId, /* nav drawer image to replace 'Up' caret */
    R.string.drawer_open, /* "open drawer" description for accessibility */
    R.string.drawer_close /* "close drawer" description for accessibility */
    ) {
        public void onDrawerClosed(View view) {
            getActionBar().setTitle(mTitle);
            invalidateOptionsMenu(); // creates call to
                                        // onPrepareOptionsMenu()
        }

        public void onDrawerOpened(View drawerView) {
            getActionBar().setTitle(mDrawerTitle);
            invalidateOptionsMenu(); // creates call to
                                        // onPrepareOptionsMenu()
        }
    };

Binding Services

Creating timer service for update Listview

Flip Card

Displaying Card Flip Animations

Open SoftKeyboard when starting DialogGragment

Create blurry bitmap

Custom Toast

via: http://blog.webagesolutions.com/archives/161

Call after drawing view

This is a Listener which gets called once that particular gets drawn completely.
via: http://stackoverflow.com/questions/12477026/how-to-understand-that-android-finished-drawing-a-view

Upload File to server

via http://androidexample.com/Upload_File_To_Server_-_Android_Example/index.php?view=article_discription&aid=83&aaid=106

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
  
public class UploadToServer extends Activity {
     
    TextView messageText;
    Button uploadButton;
    int serverResponseCode = 0;
    ProgressDialog dialog = null;
        
    String upLoadServerUri = null;
     
    /**********  File Path *************/
    final String uploadFilePath = "/mnt/sdcard/";
    final String uploadFileName = "service_lifecycle.png";
     
    @Override
    public void onCreate(Bundle savedInstanceState) {
         
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_upload_to_server);
          
        uploadButton = (Button)findViewById(R.id.uploadButton);
        messageText  = (TextView)findViewById(R.id.messageText);
         
        messageText.setText("Uploading file path :- '/mnt/sdcard/"+uploadFileName+"'");
         
        /************* Php script path ****************/
        upLoadServerUri = "http://www.androidexample.com/media/UploadToServer.php";
         
        uploadButton.setOnClickListener(new OnClickListener() {            
            @Override
            public void onClick(View v) {
                 
                dialog = ProgressDialog.show(UploadToServer.this, "", "Uploading file...", true);
                 
                new Thread(new Runnable() {
                        public void run() {
                             runOnUiThread(new Runnable() {
                                    public void run() {
                                        messageText.setText("uploading started.....");
                                    }
                                });                      
                           
                             uploadFile(uploadFilePath + "" + uploadFileName);
                                                      
                        }
                      }).start();        
                }
            });
    }
      
    public int uploadFile(String sourceFileUri) {
           
           
          String fileName = sourceFileUri;
  
          HttpURLConnection conn = null;
          DataOutputStream dos = null;  
          String lineEnd = "\r\n";
          String twoHyphens = "--";
          String boundary = "*****";
          int bytesRead, bytesAvailable, bufferSize;
          byte[] buffer;
          int maxBufferSize = 1 * 1024 * 1024; 
          File sourceFile = new File(sourceFileUri); 
           
          if (!sourceFile.isFile()) {
               
               dialog.dismiss(); 
                
               Log.e("uploadFile", "Source File not exist :"
                                   +uploadFilePath + "" + uploadFileName);
                
               runOnUiThread(new Runnable() {
                   public void run() {
                       messageText.setText("Source File not exist :"
                               +uploadFilePath + "" + uploadFileName);
                   }
               }); 
                
               return 0;
            
          }
          else
          {
               try { 
                    
                     // open a URL connection to the Servlet
                   FileInputStream fileInputStream = new FileInputStream(sourceFile);
                   URL url = new URL(upLoadServerUri);
                    
                   // Open a HTTP  connection to  the URL
                   conn = (HttpURLConnection) url.openConnection(); 
                   conn.setDoInput(true); // Allow Inputs
                   conn.setDoOutput(true); // Allow Outputs
                   conn.setUseCaches(false); // Don't use a Cached Copy
                   conn.setRequestMethod("POST");
                   conn.setRequestProperty("Connection", "Keep-Alive");
                   conn.setRequestProperty("ENCTYPE", "multipart/form-data");
                   conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
                   conn.setRequestProperty("uploaded_file", fileName); 
                    
                   dos = new DataOutputStream(conn.getOutputStream());
          
                   dos.writeBytes(twoHyphens + boundary + lineEnd); 
                   dos.writeBytes("Content-Disposition: form-data; name="uploaded_file";filename=""
                                             + fileName + """ + lineEnd);
                    
                   dos.writeBytes(lineEnd);
          
                   // create a buffer of  maximum size
                   bytesAvailable = fileInputStream.available(); 
          
                   bufferSize = Math.min(bytesAvailable, maxBufferSize);
                   buffer = new byte[bufferSize];
          
                   // read file and write it into form...
                   bytesRead = fileInputStream.read(buffer, 0, bufferSize);  
                      
                   while (bytesRead > 0) {
                        
                     dos.write(buffer, 0, bufferSize);
                     bytesAvailable = fileInputStream.available();
                     bufferSize = Math.min(bytesAvailable, maxBufferSize);
                     bytesRead = fileInputStream.read(buffer, 0, bufferSize);   
                      
                    }
          
                   // send multipart form data necesssary after file data...
                   dos.writeBytes(lineEnd);
                   dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
          
                   // Responses from the server (code and message)
                   serverResponseCode = conn.getResponseCode();
                   String serverResponseMessage = conn.getResponseMessage();
                     
                   Log.i("uploadFile", "HTTP Response is : "
                           + serverResponseMessage + ": " + serverResponseCode);
                    
                   if(serverResponseCode == 200){
                        
                       runOnUiThread(new Runnable() {
                            public void run() {
                                 
                                String msg = "File Upload Completed.\n\n See uploaded file here : \n\n"
                                              +" http://www.androidexample.com/media/uploads/"
                                              +uploadFileName;
                                 
                                messageText.setText(msg);
                                Toast.makeText(UploadToServer.this, "File Upload Complete.", 
                                             Toast.LENGTH_SHORT).show();
                            }
                        });                
                   }    
                    
                   //close the streams //
                   fileInputStream.close();
                   dos.flush();
                   dos.close();
                     
              } catch (MalformedURLException ex) {
                   
                  dialog.dismiss();  
                  ex.printStackTrace();
                   
                  runOnUiThread(new Runnable() {
                      public void run() {
                          messageText.setText("MalformedURLException Exception : check script url.");
                          Toast.makeText(UploadToServer.this, "MalformedURLException", 
                                                              Toast.LENGTH_SHORT).show();
                      }
                  });
                   
                  Log.e("Upload file to server", "error: " + ex.getMessage(), ex);  
              } catch (Exception e) {
                   
                  dialog.dismiss();  
                  e.printStackTrace();
                   
                  runOnUiThread(new Runnable() {
                      public void run() {
                          messageText.setText("Got Exception : see logcat ");
                          Toast.makeText(UploadToServer.this, "Got Exception : see logcat ", 
                                  Toast.LENGTH_SHORT).show();
                      }
                  });
                  Log.e("Upload file to server Exception", "Exception : "
                                                   + e.getMessage(), e);  
              }
              dialog.dismiss();       
              return serverResponseCode; 
               
           } // End else block 
         } 
}

via http://androidexample.com/Upload_File_To_Server_-_Android_Example/index.php?view=article_discription&aid=83&aaid=106

Recover commit file version from git repository (eclipse)

This can be done via the context menu "Replace with/File in Git index" on the file in package view.

http://stackoverflow.com/questions/1750997/eclipse-git-checkout-aka-revert/4104149#4104149

change up and moreover actionbar icon style

in values/styles.xml:

Adding % in strings.xml

just add formatted="false" in the entry:

Please the field %s, in %s, should have a value!

Get connectivity in android

Common solution:

ConnectivityManager cm =
        (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
 
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
boolean isConnected = activeNetwork != null &&
                      activeNetwork.isConnectedOrConnecting();

Using a broadcast receiver when the network state change:

Post data in body part

try {
  URL url = new URL("http://requestb.in/14a9s7m1");
     HttpURLConnection conn;
      conn = (HttpURLConnection) url.openConnection();
     conn.setRequestMethod("POST");
     
      conn.setDoOutput(true);
     
  
     OutputStream os = null;
     try {
      os = conn.getOutputStream();
      os.write("fkdlsakl!".getBytes());
   } catch (Exception e) {
      e.printStackTrace();
     }   
     os.close();
     
     conn.connect();
      int respCode = conn.getResponseCode();
  
      if(respCode == 200) {
       InputStream ip = conn.getInputStream();
//       response.headers = conn.getHeaderFields();
       int s = ip.read();
       ip.close();
      }
  } catch (Exception e) {}

Adjust image size to avoid memory issues with images so big

this is the code for decoding images inside a rectangle:

        private int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
     // Raw height and width of image
     final int height = options.outHeight;
     final int width = options.outWidth;
     int inSampleSize = 1;
 
     if (height > reqHeight || width > reqWidth) {
 
         // Calculate ratios of height and width to requested height and width
         final int heightRatio = Math.round((float) height / (float) reqHeight);
         final int widthRatio = Math.round((float) width / (float) reqWidth);
 
         // Choose the smallest ratio as inSampleSize value, this will guarantee
         // a final image with both dimensions larger than or equal to the
         // requested height and width.
         inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
     }
 
     return inSampleSize;
 }
 
 private Bitmap decodeBitmapFromResource(byte[] data,
         int reqWidth, int reqHeight) {

     // First decode with inJustDecodeBounds=true to check dimensions
     final BitmapFactory.Options options = new BitmapFactory.Options();
     options.inJustDecodeBounds = true;
     
     BitmapFactory.decodeByteArray(data, 0, data.length,options);

     // Calculate inSampleSize
     options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
     

     // Decode bitmap with inSampleSize set
     options.inJustDecodeBounds = false;
     
     return BitmapFactory.decodeByteArray(data, 0, data.length,options);
     
 }

Then you can use it in this way:

byte[] data = getImageFromUrl(url);
    
if(data!=null){
    bitmap = decodeBitmapFromResource(data, image_size, image_size);
}

Horizontal View Swipe Eclipse Example

via: http://just-another-blog.net/

The Goal is to implement horizontal View swiping with Tabs in Android like the Google Play Store.

I used the default code from Eclipse.

public class MainActivity extends FragmentActivity {

 /**
  * The {@link android.support.v4.view.PagerAdapter} that will provide
  * fragments for each of the sections. We use a
  * {@link android.support.v4.app.FragmentPagerAdapter} derivative, which
  * will keep every loaded fragment in memory. If this becomes too memory
  * intensive, it may be best to switch to a
  * {@link android.support.v4.app.FragmentStatePagerAdapter}.
  */
 SectionsPagerAdapter mSectionsPagerAdapter;

 /**
  * The {@link ViewPager} that will host the section contents.
  */
 ViewPager mViewPager;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  // Create the adapter that will return a fragment for each of the three
  // primary sections of the app.
  mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

  // Set up the ViewPager with the sections adapter.
  mViewPager = (ViewPager) findViewById(R.id.pager);
  mViewPager.setAdapter(mSectionsPagerAdapter);

 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }

 /**
  * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
  * one of the sections/tabs/pages.
  */
 public class SectionsPagerAdapter extends FragmentPagerAdapter {

  public SectionsPagerAdapter(FragmentManager fm) {
   super(fm);
  }

  @Override
  public Fragment getItem(int position) {
   // getItem is called to instantiate the fragment for the given page.
   // Return a DummySectionFragment (defined as a static inner class
   // below) with the page number as its lone argument.
   Fragment fragment = new DummySectionFragment();
   Bundle args = new Bundle();
   args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
   fragment.setArguments(args);
   return fragment;
  }

  @Override
  public int getCount() {
   // Show 3 total pages.
   return 3;
  }

  @Override
  public CharSequence getPageTitle(int position) {
   Locale l = Locale.getDefault();
   switch (position) {
   case 0:
    return getString(R.string.title_section1).toUpperCase(l);
   case 1:
    return getString(R.string.title_section2).toUpperCase(l);
   case 2:
    return getString(R.string.title_section3).toUpperCase(l);
   }
   return null;
  }
 }

 /**
  * A dummy fragment representing a section of the app, but that simply
  * displays dummy text.
  */
 public static class DummySectionFragment extends Fragment {
  /**
   * The fragment argument representing the section number for this
   * fragment.
   */
  public static final String ARG_SECTION_NUMBER = "section_number";

  public DummySectionFragment() {
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
   View rootView = inflater.inflate(R.layout.fragment_main_dummy, container, false);
   TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
   dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
   return rootView;
  }
 }

}

The Layout XML for the MainActivity:

<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<!--
This title strip will display the currently visible page title, as well as the page
titles for adjacent pages.
-->

<android.support.v4.view.PagerTitleStrip
android:id="@+id/pager_title_strip"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:background="#33b5e5"
android:paddingBottom="4dp"
android:paddingTop="4dp"
android:textColor="#fff" />

</android.support.v4.view.ViewPager>

The Layout XML for the DummyFragment:

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity$DummySectionFragment" >

<TextView
android:id="@+id/section_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</RelativeLayout>

Instead of the Dummy Fragment you can create your own Fragments.
Just create a new java class that extends “Fragment”.
You can attach your own Fragments to the “MainActivity” that way:

 @Override
 public Fragment getItem(int position) {
  Fragment fragment = new Fragment();
  switch (position) {
  case 0:
   return fragment = new Fragment1();
  case 1:
   return fragment = new Fragment2();
  case 2:
   return fragment = new Fragment3();
  default:
   break;
  }
  return fragment;

That’s all

FIX: I think there's a mistake here: try:

 @Override
 public Fragment getItem(int position) {
  Fragment fragment = new Fragment();
  switch (position) {
  case 0:
   return new Fragment1();
  case 1:
   return new Fragment2();
  case 2:
   return new Fragment3();
  default:
   break;
  }
  return fragment;

via: http://just-another-blog.net/

Show ActionBar items within fragments

To enable OnCreateOptionsMenu, onPrepareOptionsMenu, onOptionsItemSelected, in fragment, you have to call setHasOptionsMenu within the fragment’s onCreate() method:

setHasOptionsMenu(true);

Delete item swipe out listview

Code: http://developer.android.com/shareables/devbytes/ListViewRemovalAnimation.zip