【igl nanovg part-1】Android : add seperate nanovg sample project

build/android/app/src/main/java/com/facebook/igl/sample/SampleActivity.java

@@ -10,21 +10,30 @@
 package com.facebook.igl.shell;
 
 import android.app.Activity;
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.graphics.Color;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.Gravity;
 import android.view.SurfaceView;
 import android.view.View;
 import android.widget.FrameLayout;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+
 public class SampleActivity extends Activity implements View.OnClickListener {
   // UI
   LinearLayout mMainView;
   LinearLayout mTabBar;
   FrameLayout mBackendViewFrame;
 
+  private static String TAG = "SampleActivity";
+
   // initialize runtime backend configuration / context
   private int curConfig = 0;
   private SampleLib.RenderSessionConfig[] mConfigs;
@@ -89,6 +98,16 @@ protected void onCreate(Bundle icicle) {
     mMainView.addView(mTabBar);
     mMainView.addView(mBackendViewFrame);
     setContentView(mMainView);
+
+    boolean hasCopy = getSharedPreferences("data", Context.MODE_PRIVATE).getBoolean("HasCopyAssets", false);
+
+    if (!hasCopy) {
+      copyAssetsDirToSDCard(this, "", getFilesDir().getAbsolutePath());
+
+      SharedPreferences.Editor editor = getSharedPreferences("data", Context.MODE_PRIVATE).edit();
+      editor.putBoolean("HasCopyAssets",true);
+      editor.commit();
+    }
   }
 
   @Override
@@ -136,4 +155,47 @@ protected void onResume() {
       ((SampleView) mTabViews[curConfig]).onResume();
     }
   }
+
+  public static void copyAssetsDirToSDCard(Context context, String assetsDirName, String sdCardPath) {
+    Log.d(TAG, "copyAssetsDirToSDCard() called with: context = [" + context + "], assetsDirName = [" + assetsDirName + "], sdCardPath = [" + sdCardPath + "]");
+    try {
+      String list[] = context.getAssets().list(assetsDirName);
+      if (list.length == 0) {
+        InputStream inputStream = context.getAssets().open(assetsDirName);
+        byte[] mByte = new byte[1024];
+        int bt = 0;
+        File file = new File(sdCardPath + File.separator
+                + assetsDirName);
+        if (!file.exists()) {
+          file.createNewFile();
+        } else {
+          return;
+        }
+        FileOutputStream fos = new FileOutputStream(file);
+        while ((bt = inputStream.read(mByte)) != -1) {
+          fos.write(mByte, 0, bt);
+        }
+        fos.flush();
+        inputStream.close();
+        fos.close();
+      } else {
+        String subDirName = assetsDirName;
+        if (assetsDirName.contains("/")) {
+          subDirName = assetsDirName.substring(assetsDirName.lastIndexOf('/') + 1);
+        }
+        sdCardPath = sdCardPath + File.separator + subDirName;
+        File file = new File(sdCardPath);
+        if (!file.exists())
+          file.mkdirs();
+        for (String s : list) {
+          String fileName = assetsDirName.length() > 0 ?  assetsDirName + File.separator + s : s;
+          copyAssetsDirToSDCard(context, fileName , sdCardPath);
+        }
+      }
+    } catch (
+            Exception e) {
+      e.printStackTrace();
+    }
+  }
+
 }