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 import android.view.Display; 25 import android.view.WindowManager; 26 27 public class Plasma extends Activity 28 { 29 /** Called when the activity is first created. */ 30 @Override 31 public void onCreate(Bundle savedInstanceState) 32 { 33 super.onCreate(savedInstanceState); 34 Display display = getWindowManager().getDefaultDisplay(); 35 setContentView(new PlasmaView(this, display.getWidth(), display.getHeight())); 36 } 37 38 /* load our native library */ 39 static { 40 System.loadLibrary("plasma"); 41 } 42 } 43 44 class PlasmaView extends View { 45 private Bitmap mBitmap; 46 private long mStartTime; 47 48 /* implementend by libplasma.so */ 49 private static native void renderPlasma(Bitmap bitmap, long time_ms); 50 51 public PlasmaView(Context context, int width, int height) { 52 super(context); 53 mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); 54 mStartTime = System.currentTimeMillis(); 55 } 56 57 @Override protected void onDraw(Canvas canvas) { 58 //canvas.drawColor(0xFFCCCCCC); 59 renderPlasma(mBitmap, System.currentTimeMillis() - mStartTime); 60 canvas.drawBitmap(mBitmap, 0, 0, null); 61 // force a redraw, with a different time-based pattern. 62 invalidate(); 63 } 64 } 65
