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

android app read build.prop

        String key = "ro.product.name";
        String prop = getProp(key);
        Log.e(TAG, key + ": [" + prop + "]");



public String getProp(String key) {
        Process p = null;
        String prop = "";
        try {
        p = new ProcessBuilder("/system/bin/getprop", key).redirectErrorStream(true).start();
        BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String line = "";
        while ((line=br.readLine()) != null) {
        prop = line;
        }
        p.destroy();
        } catch (IOException e) {
        e.printStackTrace();
        }
        return prop;
}

build android application on command line

http://incise.org/android-development-on-the-command-line.html

http://incise.org/android-development-on-the-command-line.html

build android library on command line

android create lib-project --name UnityLibProject --target 1 --path . --package com.ebmajor.unitylib

- create project      : Creates a new Android project.

- create lib-project  : Creates a new Android library project.

UnityLibProject.java:

package com.ebmajor.unitylib;

public class UnityLibProject

{

    public static float GetValue()

    {

        return 1.0f;

    }

}

build.xml

<?xml version="1.0" encoding="UTF-8"?>

<project name="AndroidPlugin" default="help">

    ... default stuff ...

    <target name="jar" depends="debug">

        <jar

            destfile="bin/UnityLib.jar"

            basedir="bin/classes" />

    </target>

</project>

ant jar

android update lib-project
android update project

android update -h

unity calls method in android plugin

for non-static method in android plugin return void

Calls a Java method on an object (non-static).
jo.Call("setToDefaults");

for non-static method in android plugin return int
        AndroidJavaObject jo = new AndroidJavaObject("java.lang.String", "some string");

        int hash = jo.Call<int>("hashCode");

for static method in android plugin

AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity");


AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer")
jc.CallStatic("UnitySendMessage", "Main Camera", "JavaMessage", "whoowhoo");

AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
AndroidJavaObject context = activity.Call<AndroidJavaObject>("getApplicationContext");
pluginClass.CallStatic("initialize", context);

    static public void initialize (Context unityContext){
        try {
            MyApp.initialize(unityContext);
        } catch (NullPointerException e){
            Log.d("UnityPlugin", "Null PTR Exception");
            e.printStackTrace();
        }
    }

 void OnDestroy() {
        int ret;
        AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
        AndroidJavaObject context = activity.Call<AndroidJavaObject>("getApplicationContext");
        AndroidJavaClass plugIn = new AndroidJavaClass("com.ebmajor.plugin.MyReceiver");
        ret = plugIn.CallStatic<int>("sendExitEvent", context, 10);
        Debug.LogError("android lib: sendExitEvent returned: " + ret);
    }


public static int sendExitEvent(Context context, int val) {
    Intent intent = new Intent();
    intent.setAction("com.ebmajor.ACTION");
    context.sendBroadcast(intent);
    return 1;
}

=========================================================================================

==========================================================================================

android plug-in under Unity

==========================================================================================

package com.le.androidlib;

public class MyActivity extends UnityPlayerActivity {

    static public String getArgs() {

        return uri_arg;

    }

}

==========================================================================================

Unity.cs

==========================================================================================

void Awake()

{

        AndroidJavaObject jo = new AndroidJavaObject("com.le.androidlib.MyActivity");

        string arg = jo.CallStatic<string>("getArgs"); //string return

        Debug.Log("MediaPlayer: arg: " + arg);
        jo.CallStatic<int>("getArgsInt"); //int return
        jo.CallStatic("flushPendingCommands"); //void return

}

==========================================================================================