1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.example.plasma; 17 18 import android.app.Activity; 19 import android.os.Bundle; 20 import android.content.Context; 21 import android.view.View; 22 import android.graphics.Bitmap; 23 import android.graphics.Canvas; 24 25 public class Plasma extends Activity 26 { 27 /** Called when the activity is first created. */ 28 @Override onCreate(Bundle savedInstanceState)29 public void onCreate(Bundle savedInstanceState) 30 { 31 super.onCreate(savedInstanceState); 32 setContentView(new PlasmaView(this)); 33 } 34 35 /* load our native library */ 36 static { 37 System.loadLibrary("plasma"); 38 } 39 } 40 41 class PlasmaView extends View { 42 private Bitmap mBitmap; 43 private long mStartTime; 44 45 /* implementend by libplasma.so */ renderPlasma(Bitmap bitmap, long time_ms)46 private static native void renderPlasma(Bitmap bitmap, long time_ms); 47 PlasmaView(Context context)48 public PlasmaView(Context context) { 49 super(context); 50 51 final int W = 200; 52 final int H = 200; 53 54 mBitmap = Bitmap.createBitmap(W, H, Bitmap.Config.RGB_565); 55 mStartTime = System.currentTimeMillis(); 56 } 57 onDraw(Canvas canvas)58 @Override protected void onDraw(Canvas canvas) { 59 //canvas.drawColor(0xFFCCCCCC); 60 renderPlasma(mBitmap, System.currentTimeMillis() - mStartTime); 61 canvas.drawBitmap(mBitmap, 0, 0, null); 62 // force a redraw, with a different time-based pattern. 63 invalidate(); 64 } 65 } 66