showing dialog after activity finished

android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@6346ff9 is not valid; is your activity running?

if(((Activity) context).isFinishing()) {
    return;
}

Java Interface callback example

***** Interface class
public class ExtServiceCallback {
    static ExtServiceCallback.Callback sCallbacks = null;

    public void runServiceCallback(String path, String method, String query, HashMap<String, String> headers, String msgBody) {
        sCallbacks.downToExtService(path, method, query, headers, msgBody);
    }

    public void setCallback(ExtServiceCallback.Callback callback) {
        sCallbacks = callback;
    }

    public interface Callback {
        public void downToExtService(String path, String method, String query, HashMap<String, String> headers, String msgBody);
    }
}

***** App usage

protected void onCreate(Bundle savedInstanceState) {
    ServerCallback callback  = new ServerCallback();
}

public class ServerCallback extends ExtServiceCallback implements ExtServiceCallback.Callback {
    private static final String TAG = "ServerCallback";

    public ServerCallback() {
        Log.e(TAG, "ServerCallback");
        setCallback(this);
    }

    @Override    public void downToExtService(String path, String method, String query, HashMap<String, String> headers, String msgBody) {
        Log.e(TAG, "path: " + path + ", " +
                "method: " + method + ", " +
                "query: " + query + ", " +
                "msgBody: " + msgBody);
    }
}

Android Studio - add new module

File -> New -> Import Module...

src/app/main/build.gradle

dependencies {

    compile project (':apolloRegistry')

}

customized list view and helper APIs

import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;

import java.util.List;

public class CustomListViewAdapter extends ArrayAdapter<RowItem> {
    private static final String TAG = "ListAdapter";
    Context mContext;
    Activity mActivity;

    public CustomListViewAdapter(Context context, Activity activity, int resourceId,
                                 List<RowItem> items) {
        super(context, resourceId, items);
        this.mContext = context;
        this.mActivity = activity;
    }

    /*private view holder class*/
    private class ViewHolder {
        ImageView imageView;
        TextView txtTitle;
        TextView txtDesc;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        RowItem rowItem = getItem(position);

        LayoutInflater mInflater = (LayoutInflater) mContext
                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.video_list_layout, null);
            holder = new ViewHolder();
            holder.imageView = (ImageView) convertView.findViewById(R.id.icon);
            holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
            holder.txtDesc = (TextView) convertView.findViewById(R.id.desc);
            convertView.setTag(holder);
        } else
            holder = (ViewHolder) convertView.getTag();

        holder.imageView.setImageResource(rowItem.getImageId());
        holder.txtTitle.setText(rowItem.getTitle());
        holder.txtDesc.setText(rowItem.getDesc());

        return convertView;
    }

    RowItem getRowItem(int index) {
        ListView selectList = (ListView) mActivity.findViewById(R.id.video_list_view);
        ListAdapter lAdapter = selectList.getAdapter();
        RowItem item = (RowItem) lAdapter.getItem(index);
        Log.i(TAG, "item.link:" + item.getLink());

        return item;
    }

    int getItemIndex(String title) {
        int index;
        ListView selectList = (ListView) mActivity.findViewById(R.id.video_list_view);
        ListAdapter adapter = selectList.getAdapter();

        for (index = 0; index < adapter.getCount(); index++) {
            RowItem item = (RowItem) adapter.getItem(index);
            if (item.getTitle().matches(title)) {
                break;
            }
        }

        if (index == adapter.getCount())
            return -1;

        return index;
    }

    public void setImageByIndex(TypedArray images, int index, int image_index) {
        ListView listView = (ListView) mActivity.findViewById(R.id.video_list_view);
        ListAdapter adapter = listView.getAdapter();

        int wantedPosition = index; // Whatever position you're looking for
        int firstPosition = listView.getFirstVisiblePosition() - listView.getHeaderViewsCount(); // This is the same as child #0
        int wantedChild = wantedPosition - firstPosition;

        if (wantedChild < 0 || wantedChild >= listView.getChildCount()) {
            Log.w(TAG, "Unable to get view for desired position, because it's not being displayed on screen.");
            return;
        }

        View wantedView = listView.getChildAt(wantedChild);
        ViewHolder holder = (ViewHolder) wantedView.getTag();
        holder.imageView.setImageResource(images.getResourceId(image_index, 0));
    }
}

Creating a native Android plugin for Unity3d

using command lines

http://www.what-could-possibly-go-wrong.com/creating-a-native-android-plugin-for-unity3d/

android file path convert content:// into file://

public void onActivityResult(int requestCode, int resultCode, Intent resultData) {
    Uri uri;
    uri = resultData.getData();
    String path = UriHelpers.getFileForUri(getContext(), uri).getAbsolutePath();
   
    public static File getFileForUri(final Context context, final Uri uri) {
        String path = null;
        // DocumentProvider
        if (DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                if ("primary".equalsIgnoreCase(type)) {
                    path = Environment.getExternalStorageDirectory() + "/" + split[1];
                }
            } else if (isDownloadsDocument(uri)) {
                // DownloadsProvider
                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris
                        .withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));

                path = getDataColumn(context, contentUri, null, null);
            } else if (isMediaDocument(uri)) {
                // MediaProvider
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }

                final String selection = "_id=?";
                final String[] selectionArgs = new String[] {
                        split[1]
                };

                path = getDataColumn(context, contentUri, selection, selectionArgs);
            }
        } else if ("content".equalsIgnoreCase(uri.getScheme())) {
            // MediaStore (and general)
            path = getDataColumn(context, uri, null, null);
        } else if ("file".equalsIgnoreCase(uri.getScheme())) {
            // File
            path = uri.getPath();
        }

        if (path != null) {
            return new File(path);
        }
        return null;
    }

    private static String getDataColumn(Context context, Uri uri, String selection,
                                        String[] selectionArgs) {

        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {
                column
        };

        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
                    null);
            if (cursor != null && cursor.moveToFirst()) {
                final int column_index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(column_index);
            }
        } finally {
            if (cursor != null) {
                cursor.close();
            }
        }
        return null;
    }


    private static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    private static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    private static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }
}

ubuntu git clone gnutls_handshake() failed: Illegal parameter

http://askubuntu.com/questions/186847/error-gnutls-handshake-failed-when-connecting-to-https-servers

Trouble shootings

* Unmet build dependencies: libcurl4-openssl-dev
   add "-d" option to override

 sudo dpkg-buildpackage -rfakeroot -b -d

remove "NO_OPENSSL=1" from debian/rules