[android help] Update issue of an app widget using collection

I have created an app widget using collection for my app, The widget shows date and list of item on that particular date. Everything works fine and the widget are updating as required, But sometimes what happen while changing the date in the widget by clicking next and previous button, the list is not refresh means the items are not updated on that particular date. This behaviour is random and its occur sometimes only. So why this happen, anything wrong in my code.

Code that i have use is:

WidgetProvider.class

public class WidgetProvider extends AppWidgetProvider 
{   
    private ThemeManager    m_ThemeManagerObject;

    private static String   WIDGET_NEXT_BUTTON = "in.test.widgetApp.WIDGET_NEXT_BUTTON";

    private static String   WIDGET_PREV_BUTTON = "in.test.widgetApp.WIDGET_PREV_BUTTON";    

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) 
    {               
        super.onUpdate(context, appWidgetManager, appWidgetIds);

        // Set Date to current Date
        NoteManager.getSingletonObject().setWidgetToCurrentDate();

        // Code to update the widget by current date 
        updateAppWidget(context, AppWidgetManager.getInstance(context), appWidgetIds);
    }   

    @Override
    public void onReceive(Context context, Intent intent) 
    {           
        super.onReceive(context, intent);

        int numOfDays = 1;

        ComponentName thisWidget = new ComponentName(context, WidgetProvider.class);
        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
        int[] appWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);

        if (intent.getAction().equals(WIDGET_NEXT_BUTTON)) 
        {
            // Increase no of days by one
            // Update the widget by new date 
            NoteManager.getSingletonObject().setWidgetDate(numOfDays);          
            updateAppWidget(context, AppWidgetManager.getInstance(context), appWidgetIds);
        }   
        else if (intent.getAction().equals(WIDGET_PREV_BUTTON)) 
        {
            // Decrease no of days by one
            // Update the widget by new date 
            NoteManager.getSingletonObject().setWidgetDate(-numOfDays);         
            updateAppWidget(context, AppWidgetManager.getInstance(context), appWidgetIds);
        }                   
    }

        public void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
{
    // Get the folder path of all-page-view
    ContextWrapper cw = new ContextWrapper(context.getApplicationContext());
    File customDirectoryPath = cw.getDir(Utilities.CUSTOM_DIRECTORY_NAME_PREFIX, Context.MODE_PRIVATE);
    File allPageDirectoryPath = new File(customDirectoryPath.getPath() + "/" + Utilities.All_PAGE_DIRECTORY_NAME_PREFIX); 

    if (!(allPageDirectoryPath.exists()))
        allPageDirectoryPath.mkdirs();

    // Create an singleton object of ThemeManager class
    m_ThemeManagerObject = ThemeManager.getSingletonObject();
    m_ThemeManagerObject.readTheme(allPageDirectoryPath.getPath());

    // Create an instance of SimpleDateFormat class
    SimpleDateFormat dateFormater = new SimpleDateFormat("dd-MMM, EEE", Locale.US);

    /* loop through all widget instances */
    for (int widgetId : appWidgetIds) 
    { 
        // Create an instance of remote view class
        RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.layout.widget_list);       
        Intent svcIntent = new Intent(context, WidgetService.class);
        svcIntent.setData(Uri.fromParts("content", String.valueOf(widgetId), null));        
        remoteView.setRemoteAdapter(R.id.widget_list, svcIntent);   

        // Show day, month and week day inside the widget
        remoteView.setTextViewText(R.id.txt_date, dateFormater.format(NoteManager.getSingletonObject().getWidgetDate().getTime()));

        // If the list is empty. Show empty widget with juswrite-icon & empty text to the user          
        remoteView.setEmptyView(R.id.widget_list, R.id.widget_empty_text);              

        // On click of next button
        Intent nextButtonIntent = new Intent(WIDGET_NEXT_BUTTON);
        /* use widgetId as second parameter - it helped me to better address particular widget instance */
        PendingIntent nextButtonPendingIntent = PendingIntent.getBroadcast(context, widgetId, nextButtonIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteView.setOnClickPendingIntent(R.id.btn_next_month, nextButtonPendingIntent);
        remoteView.setInt(R.id.btn_next_month, "setBackgroundResource", m_ThemeManagerObject.getNextButtonBgImage());

        // On click of previous button
        Intent prevButtonIntent = new Intent(WIDGET_PREV_BUTTON);
        /* use widgetId as second parameter - same as above */
        PendingIntent prevButtonPendingIntent = PendingIntent.getBroadcast(context, widgetId, prevButtonIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteView.setOnClickPendingIntent(R.id.btn_prev_month, prevButtonPendingIntent);
        remoteView.setInt(R.id.btn_prev_month, "setBackgroundResource", m_ThemeManagerObject.getPrevButtonBgImage());

        // Open application on click of app widget
        Intent clickIntent = new Intent(context, AllPageViewActivity.class);
        PendingIntent clickPI = PendingIntent.getActivity(context, 0,clickIntent,PendingIntent.FLAG_UPDATE_CURRENT);
        remoteView.setOnClickPendingIntent(R.id.widget_empty_text, clickPI);
        remoteView.setOnClickPendingIntent(R.id.txt_date, clickPI);

        /* update one widget instance at a time*/
        appWidgetManager.updateAppWidget(widgetId, remoteView);
    }
}
}

WidgetService.class

public class WidgetService extends RemoteViewsService 
{
    @Override
    public RemoteViewsFactory onGetViewFactory(Intent intent) 
    {
        return(new WidgetDisplay(this.getApplicationContext(), intent));
    }
}

WidgetDisplay.class

public class WidgetDisplay implements RemoteViewsService.RemoteViewsFactory
{
    private File m_CustomDirectoryPath, m_AllPageDirectoryPath;

    private NoteManager m_NoteManagerObject;

    private ThemeManager m_ThemeManagerObject;

    private ArrayList   m_AlarmItemNameArrayList;

    private ArrayList  m_ItemIndexArray;

    private Context ctxt=null;

    int appWidgetId;

    Bitmap canvasBackground;

    public WidgetDisplay(Context ctxt, Intent intent) 
    {
        this.ctxt=ctxt;

        appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);

        setImageInView(this.ctxt);

    }

    private void setImageInView(Context context) 
    {
        ContextWrapper cw = new ContextWrapper(ctxt.getApplicationContext());
        m_CustomDirectoryPath = cw.getDir(Utilities.CUSTOM_DIRECTORY_NAME_PREFIX, Context.MODE_PRIVATE);
        m_AllPageDirectoryPath = new File(m_CustomDirectoryPath.getPath() + "/" + Utilities.All_PAGE_DIRECTORY_NAME_PREFIX); 

        m_NoteManagerObject = NoteManager.getSingletonObject();
        m_ThemeManagerObject = ThemeManager.getSingletonObject();

        m_NoteManagerObject.readSettings(m_AllPageDirectoryPath.getPath());
        m_NoteManagerObject.readAllPageChangesFromFile(m_AllPageDirectoryPath.getPath());
        m_NoteManagerObject.readAlarmFromFile(m_AllPageDirectoryPath.getPath());
        m_ThemeManagerObject.readTheme(m_AllPageDirectoryPath.getPath());

        m_AlarmItemNameArrayList = new ArrayList(m_NoteManagerObject.getAlarmCount());
        m_ItemIndexArray = new ArrayList(m_NoteManagerObject.getAlarmCount());

        SimpleDateFormat sdFormatter = new SimpleDateFormat("dd-MMM-yyyy", Locale.US);      
        String selectedDate = sdFormatter.format(m_NoteManagerObject.getWidgetDate());

        for(int i=0; i        {
            String ArrayDate = sdFormatter.format(m_NoteManagerObject.getAlarmTime(i));         
            if(selectedDate.equals(ArrayDate))
            {
                File noteDirectoryPath = new File(m_CustomDirectoryPath.getPath() + "/" + m_NoteManagerObject.getAlarmFolder(i));
                m_AlarmItemNameArrayList.add(noteDirectoryPath.getPath() + "/" + m_NoteManagerObject.getAlarmItem(i));

                m_ItemIndexArray.add(i);
            }
        }
    }

    @Override
    public int getCount() 
    {
        return(m_AlarmItemNameArrayList.size());
    }

    @Override
    public RemoteViews getViewAt(int position) 
    {       
        new ImageLoaderTask(position).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);

        // Set combine image to the image view using remote view instance
        RemoteViews remoteView = new RemoteViews(ctxt.getPackageName(), R.layout.widget_list_item);
        remoteView.setImageViewBitmap(R.id.image_view, canvasBackground);

        // Set time text view using remote view instance
        SimpleDateFormat timeFormater;

        if(m_NoteManagerObject.get24HourFormat())
        {
            timeFormater = new SimpleDateFormat("HH:mm", Locale.US);
        }
        else
        {
            timeFormater = new SimpleDateFormat("hh:mm a", Locale.US );
        }

        // Show time on the top of each image view
        String time = timeFormater.format(m_NoteManagerObject.getAlarmTime(m_ItemIndexArray.get(position)));            
        remoteView.setTextViewText(R.id.text_alarm_time,  time);        

        Intent clickIntent = new Intent(ctxt, AllPageViewActivity.class);
        PendingIntent clickPI=PendingIntent.getActivity(ctxt, 0,clickIntent,PendingIntent.FLAG_UPDATE_CURRENT);
        remoteView.setOnClickPendingIntent(R.id.image_view, clickPI);

        return(remoteView);
    }

    class ImageLoaderTask extends AsyncTask
    {
        private int position;

        ImageLoaderTask(int position)
        {
            this.position = position;
        }

        @Override
        protected void onPreExecute()
        {
            // Get foreground and background image
            Bitmap bitmapImage = BitmapFactory.decodeFile(m_AlarmItemNameArrayList.get(position)).copy(Bitmap.Config.ARGB_8888, true);
            canvasBackground = BitmapFactory.decodeResource(ctxt.getResources(), m_ThemeManagerObject.getWidgetListItemBgImage(m_ItemIndexArray.get(position), bitmapImage)).copy(Bitmap.Config.ARGB_8888, true);

            // Scaled foreground image and combine with the background image
            bitmapImage = Bitmap.createScaledBitmap(bitmapImage, 380, bitmapImage.getHeight() / 2, true);               
            Canvas comboImage = new Canvas(canvasBackground);
            comboImage.drawBitmap(bitmapImage, 0f, 0f, null);
        }

        @Override
        protected Long doInBackground(URL... urls)
        {
            return null;
        }

        @Override
        protected void onProgressUpdate(Integer... progress)
        {

        }

        @Override
        protected void onPostExecute(Long result)
        {

        }
    }

    @Override
    public void onCreate(){ 
    }

    @Override
    public void onDestroy(){
    }

    @Override
    public RemoteViews getLoadingView()
    {
        return(null);
    }

    @Override
    public int getViewTypeCount(){
        return(1);
    }

    @Override
    public long getItemId(int position){
        return(position);
    }

    @Override
    public boolean hasStableIds(){
        return(true);
    }

    @Override
    public void onDataSetChanged(){
    }
}

.

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[android help] How to use a timer to change the position of a imageview continuously

I want to change the location of a image view every short period. The location is random numbers. Here is my code:

    rl = (RelativeLayout) findViewById(R.id.relativeLayout);
    final ImageView i = (ImageView) findViewById(R.id.imageView1);
    i.setImageResource(R.drawable.rat);

    Timer t = new Timer();
    final Handler h = new Handler();
    final Runnable r = new Runnable(){

        @Override
        public void run() {
            // TODO Auto-generated method stub
            i.requestLayout();
            rl.removeView(i);
            Display display = getWindowManager().getDefaultDisplay(); 
            int sw = display.getWidth();
            int sh = display.getHeight();
            Random w = new Random();
            Random h = new Random();
            int width = w.nextInt(sw);
            int height = h.nextInt(sh);
            tv.setText(String.format("%s",height));

            LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            params.leftMargin = width;
            params.topMargin = height;
            i.setLayoutParams(params);
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        }

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        @Override
        public void run() {
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        }

    };
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This does not work for me, the image does not change. I need someone to help me solve this. Thanks.

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[android help] How to cancel Asynch task in below case

Please dont downvote considering its repeated question. I have already read all questions to related to cancelling asynch task

Basicaly I hav three function which execute three different queries and shows the list On click of corresponding radio button.Before doing db operation I hide list container and display progress bar spining and on post execute vice versa. at any time user can click other radio button and select differnt list.

Now my problem is once asynch task is started I am not able to stop it Since I m calling function inside asynch task.I could only check isCanclelled before executing the function.Once function is invoked from Asynch task I dont have controll and function which is bieng called takes most of the time to execute.So how does I stop that function to execute. when user press another radio.

One possible solution would be to use different subclass of asynch task for each function/task. or instead of calling function put enitre code in do in Background function

I would like to know more Ideal way of achieving this task.

Currently my code which does not work properly.

public class ShopListView extends FragmentActivity {

public static Location currentLocation;
private static LocationTracker lTracker;
private static final String TAG = "ShopListView";
private GetList mTask=null;
private String mIntent="showPopular";
ListView lview;
boolean flagCategory=false;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_shop_list_view);
    lview= (ListView) findViewById(R.id.listView1);
    RadioGroup radioGroupListSelector = (RadioGroup) findViewById(R.id.radio_group_list_selector);
    radioGroupListSelector.setOnCheckedChangeListener(new OnCheckedChangeListener() 
    {

        public void onCheckedChanged(RadioGroup group, int checkedId) {
            // checkedId is the RadioButton selected

            switch (checkedId) {
          case R.id.radioPopular : 
              Log.i(TAG,"Popular Radio Button Selected");

              if(mTask!=null)
              {
              mTask.cancel(true);
              Log.i(TAG,"Canceling Current Task");
              }
              else
              {
              mTask=new GetList();    
              mTask.execute("showPopular");
              }

                                          break;
          case R.id.radioAZ :
              Log.i(TAG,"AZ Radio Button Selected");

             if(mTask!=null)
              {
              mTask.cancel(true);
              Log.i(TAG,"Canceling Current Task");
              }
              else
              {
                 mTask=new GetList();     
              mTask.execute("showAZ");
              }

               break;
          case R.id.radioCategory: 
              Log.i(TAG,"Category Radio Button Selected");

             if(mTask!=null)
              {
              mTask.cancel(true);
              Log.i(TAG,"Canceling Current Task");

              }
              else
              {
              mTask=new GetList();
              mTask.execute("showCategory");
              }
               break;

          case R.id.radioNearBy :
              Log.i(TAG,"NearBy Radio Button Selected");


             if(mTask!=null)
              {
              mTask.cancel(true);
              Log.i(TAG,"Canceling Current Task");

              }
              else
              {
              mTask=new GetList();
              mTask.execute("showNearBy");
              }
               break;

          default:
             if(mTask!=null)
              {
              mTask.cancel(true);
              Log.i(TAG,"Canceling Current Task");

              }

              showFeatured();
              Log.i(TAG,"No Radio Selected");

        }
        }
    });




}



public void showFeatured()
{

}

public ArrayList showPopular(){
    flagCategory=false;
    ArrayList list=new ArrayList();
    String sql="select  S.shopName shopName from streetShopInfo AS S JOIN ratings AS R  where S.shopName=R.shopName and R.overall >0 order by S.shopName";
    Log.i(TAG,"Creating Adapter for Fetching Data");
    StreetFoodDataBaseAdapter mDBAdapter= new StreetFoodDataBaseAdapter(this);
    Log.i(TAG,"Adapter Ready..");
    Log.i(TAG,"Creating/Opening Database");
    mDBAdapter.createDatabase();       
    mDBAdapter.open();
    Log.i(TAG,"Requesting info from getInfo function");
    list=mDBAdapter.getInfo(sql,"shopName");
    Log.i(TAG,"Information Retrived Passing it to SetView");
    //setView(list);
    mDBAdapter.close();
    return list;
}

public ArrayList showNearBy() {

    flagCategory=false;
    ArrayList list=new ArrayList();
    list=null;

    String sql="select shopName shopName from streetShopInfo where distance<3";
    //currentLocation=lTracker.getLocation();
    Log.i(TAG,"Location Tracker Started");
    StreetFoodDataBaseAdapter mDBAdapter= new StreetFoodDataBaseAdapter(this);
    mDBAdapter.createDatabase();       
    mDBAdapter.open();
    currentLocation=lTracker.getLocation();
    if(mDBAdapter.validDistance() && currentLocation!=null && currentLocation.getLatitude()!=0)   
    {
    Log.i(TAG,"Now Fetching Near By Location from DB");
    list=mDBAdapter.getInfo(sql,"shopName");
    Log.i(TAG,"Cursor Values Retrived into Array list");
    mDBAdapter.close();
    }
    else
    {
        if(currentLocation!=null && currentLocation.getLatitude()!=0 )   
           {
                   Log.i(TAG,"Location Received");   
                   mDBAdapter.updateDistance();
                   list=mDBAdapter.getInfo(sql,"shopName");
                   mDBAdapter.close();

           }
    }
     return list;
}


public ArrayList showAZ(){
    ArrayList list=new ArrayList();
    flagCategory=false;
    String sql="select shopName from streetShopInfo order by shopName";
    StreetFoodDataBaseAdapter mDBAdapter= new StreetFoodDataBaseAdapter(this);
    mDBAdapter.createDatabase();       
    mDBAdapter.open();
    list=mDBAdapter.getInfo(sql,"shopName");
    Log.i(TAG,"Cursor Values Retrived into Array list");
    //setView(list);
    mDBAdapter.close();
    return list;
}

public ArrayList showCategory(){
    ArrayList list=new ArrayList();
    flagCategory=true;
    String sql="select  distinct category from streetShopInfo order by category";
    StreetFoodDataBaseAdapter mDBAdapter= new StreetFoodDataBaseAdapter(this);
    mDBAdapter.createDatabase();       
    mDBAdapter.open();
    list=mDBAdapter.getInfo(sql,"category");
    Log.i(TAG,"Cursor Values Retrived into Array list");
    //setView(list);
    mDBAdapter.close();
    return list;
}










   /*
    * Sub Class for Asynchronous Task
    */
   class GetList extends AsyncTask >
   {

    LinearLayout linlaHeaderProgress = (LinearLayout) findViewById(R.id.linlaHeaderProgress);
    LinearLayout linlaContainer = (LinearLayout) findViewById(R.id.ListViewContainer); 
    @Override
    protected void onPreExecute() 
    {
        // TODO Auto-generated method stub
        super.onPreExecute();
        linlaContainer.setVisibility(View.GONE);
        linlaHeaderProgress.setVisibility(View.VISIBLE);

    }


    protected ArrayList  doInBackground(String... params) 
    {
        ArrayList result = null;
        // TODO Auto-generated method stub
        if(params[0].equals("showNearBy") && !isCancelled())
            result=showNearBy();
        else if(params[0].equals("showPopular")  && !isCancelled())
            result=showPopular();
        else if(params[0].equals("showAZ") && !isCancelled())
            result=showAZ();
        else if(params[0].equals("showCategory") && !isCancelled()) 
            result=showCategory();
        return result;
    }

    @Override
    protected void onCancelled() {
        super.onCancelled();

        linlaHeaderProgress.setVisibility(View.GONE);
        linlaContainer.setVisibility(View.VISIBLE);

        // ask if user wants to try again
    }

    @Override
    protected void onPostExecute(ArrayList result) 
    {
        // TODO Auto-generated method stub
        super.onPostExecute(result);
        linlaHeaderProgress.setVisibility(View.GONE);
        linlaContainer.setVisibility(View.VISIBLE);

        if(result!=null)
          setView(result);
        else
        Toast.makeText(ShopListView.this,"Sorry Your Location not available..",Toast.LENGTH_LONG).show();


    }

   }

}

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            android:layout_height="fill_parent"
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                                android:layout_width="fill_parent"
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I am using below line to connect to local server Xampp:

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Secondly, i have written php class code:

    
$objConnect = mysql_connect("localhost","root","");
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$_POST["sPassword"] = "b";
$_POST["sName"] = "c";
$_POST["sEmail"] = "d";
$_POST["sTel"] = "e";

$strUsername = $_POST["sUsername"];
$strPassword = $_POST["sPassword"];
$strName = $_POST["sName"];
$strEmail = $_POST["sEmail"];
$strTel = $_POST["sTel"];

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$arr['StatusID'] = "0";
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echo json_encode($arr);
exit();
}

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}

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'".$strUsername."',
'".$strPassword."',
'".$strName."',
'".$strEmail."',
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{
$arr['StatusID'] = "1";
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}

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I'm using Terminal-IDE as my development environment. (Google code site here.)

Please Note

The Terminal-IDE environment is unique and its problems are likely unique. Would someone with enough "reputation" PLEASE create the tag "Terminal-IDE" for us? I don't have enough...

I'm running Terminal-IDE v 2.02 - the very latest. My Android versions are:

• Android 4.0.3


• Software version 2.14.531.3 71ORD


• (the rest aren't likely pertinent, but more on request)

I'm in a suitable development directory with a simple enough c source code file ready and run 'make'.

I have never yet gotten any compilation to work successfully. Most likely, there's a version mis-match with regard to what executable is available versus what the software is looking for.

Here's the command and error message:

terminal-gcc -c -Wall -I/data/data/com.spartacusrex.spartacuside/files/local/include tester.c -o tester.o
/data/data/com.spartacusrex.spartacuside/files/system/bin/terminal-gcc[43]: arm-eabi-gcc: not found
make: *** [tester.o] Error 127

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It may also be that PATH is set wrong. All input appreciated.

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repo init

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repo sync

This will update your current working directory to the exact state specified by the master version of the manifest you downloaded. To checkout a different version of the AOSP, you use:

repo init -b version_name

This updates the manifest to the one that contains information about the Android version you want (also called a branch).

Don't forget to sync.

To switch to another manifest branch, repo init -b otherbranch may be used in an existing client. However, as this only updates the manifest, a subsequent repo sync (or repo sync -d) is necessary to update the working directory files.

The behavior you are experiencing may seem weird because you're probably not used to working with a system that overwrites your local state so easily. When using git, you're not supposed to init a bunch of times in the same directory. Another option, then, is to make new directories for each project. The purpose of the .repo directory is to store all the information relevant to your current repo setup (also like the .git directory). In fact, running repo init does many things:

1. Downloads the manifest from the specified url.


2. Tries to open or create the .repo directory.


3. Makes sure your GPG key is set up.


4. Clones the specified branch (which defaults to REPO_REV if none is specified).


5. Verifies it.


6. Checks out the appropriate branch for each of the projects.

I would assume the clone operation writes over information in the .repo folder. The reason it takes ages after the first command you run:

repo init -u https://android.googlesource.com/platform/manifest
repo sync

Is because it has to download many gigabytes of information. Now, going from the master branch to gingerbread repo knows it simply needs to drop about 68 commits which can be done very quickly.

$ repo init -u https://android.googlesource.com/platform/manifest -b gingerbread
$ repo sync
...
.repo/manifests/: discarding 68 commits
...

Ramping back up to android_4.2.2_r1 means repo needs to not just download any information needed by those commits again, but also update the current branches on all the referenced projects. This will take a long time. We are trading disk usage for processing time (=

really?

Now, this presents a problem: what if you want to compare two repo branches at once? This is difficult because when you repo init && repo sync you lose the old information you were looking at. The answer, then, is to copy the relevant information and then repo init && repo sync again. This will get annoying really fast -- thankfully repo provides a way to speed up this process if you have the disk space.

One strategy to make things quicker is to create a local mirror in a workspace/master directory. Then, checkout your desired branch from the mirror in a new directory, e.g. workspace/gingerbread . Now you can switch between branches simply by changing to the appropriate directory.

Mirror the AOSP locally:

cd workspace
mkdir master && cd master
repo init --mirror

will cause repo to mirror the remote server on your local machine. Then, when you want to switch to a new branch, you can:

mkdir ../gingerbread && cd ../gingerbread
repo init -b version_name --reference=../master

The result is a workspace with a folder containing the mirror and a folder containing the gingerbread branch referencing the mirror where possible.

The other option is to simply initialize and sync the branch you want, then copy the folder to another location and use the copy to initialize and sync again. Repo should only download what's missing.

Other repo uses:

Beyond init, repo provides support for passing commands, such as branch, to all the different git repositories in a given manifest so that you don't have to worry about that when working with the code. It also facilitates collaboration by making it easy to submit your local changes to the gerrit code review system. I'm unsure what the official reason for partitioning the AOSP into multiple git repositories is, but I would imagine it was done in order to manage the scaling issues of version control and in order to keep the project robust and fault-tolerant (if someone brakes one git repo it doesn't destroy the entire AOSP). It is also necessary to provide a way that vendors can contribute back to the source and letting them manage their own git repositories which can simply be registered with, or entered into, a overarching manifest makes sense. I didn't answer your questions line-item, but does this give you the information you are looking for?

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