Copy platforms and samples from ndk/ source tree.

The idea is to allow developing the NDK in the open, while
having the platforms and samples under a private branch until
the corresponding release are open-sourced.

Change-Id: Iee995fb6c4d3ee1387dea7486e599e079c9e4c6d

ndk/samples/bitmap-plasma/src/com/example/plasma/Plasma.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.example.plasma;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.content.Context;
+import android.view.View;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+
+public class Plasma extends Activity
+{
+    /** Called when the activity is first created. */
+    @Override
+    public void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        setContentView(new PlasmaView(this));
+    }
+
+    /* load our native library */
+    static {
+        System.loadLibrary("plasma");
+    }
+}
+
+class PlasmaView extends View {
+    private Bitmap mBitmap;
+    private long mStartTime;
+
+    /* implementend by libplasma.so */
+    private static native void renderPlasma(Bitmap  bitmap, long time_ms);
+
+    public PlasmaView(Context context) {
+        super(context);
+
+        final int W = 200;
+        final int H = 200;
+
+        mBitmap = Bitmap.createBitmap(W, H, Bitmap.Config.RGB_565);
+        mStartTime = System.currentTimeMillis();
+    }
+
+    @Override protected void onDraw(Canvas canvas) {
+        //canvas.drawColor(0xFFCCCCCC);
+        renderPlasma(mBitmap, System.currentTimeMillis() - mStartTime);
+        canvas.drawBitmap(mBitmap, 0, 0, null);
+        // force a redraw, with a different time-based pattern.
+        invalidate();
+    }
+}