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| 1 package com.example; |
| 2 |
| 3 import java.util.Timer; |
| 4 import java.util.TimerTask; |
| 5 |
| 6 import android.app.Activity; |
| 7 import android.content.Context; |
| 8 import android.graphics.Bitmap; |
| 9 import android.graphics.Canvas; |
| 10 import android.os.Bundle; |
| 11 import android.os.SystemClock; |
| 12 import android.util.Log; |
| 13 import android.view.View; |
| 14 |
| 15 public class HelloSkiaActivity extends Activity |
| 16 { |
| 17 private SkiaDrawView fMainView; |
| 18 |
| 19 /** Called when the activity is first created. */ |
| 20 @Override |
| 21 public void onCreate(Bundle savedInstanceState) { |
| 22 super.onCreate(savedInstanceState); |
| 23 |
| 24 // Makes and sets a SkiaDrawView as the only thing seen in this activity |
| 25 fMainView = new SkiaDrawView(this); |
| 26 setContentView(fMainView); |
| 27 |
| 28 try { |
| 29 // Load Skia and then the app shared object in this order |
| 30 System.loadLibrary("skia_android"); |
| 31 System.loadLibrary("hello_skia_ndk"); |
| 32 |
| 33 } catch (UnsatisfiedLinkError e) { |
| 34 Log.d("HelloSkia", "Link Error: " + e); |
| 35 return; |
| 36 } |
| 37 |
| 38 // Set a timer that will periodically request an update of the SkiaDrawV
iew |
| 39 Timer fAnimationTimer = new Timer(); |
| 40 fAnimationTimer.schedule(new TimerTask() { |
| 41 public void run() |
| 42 { |
| 43 // This will request an update of the SkiaDrawView, even from ot
her threads |
| 44 fMainView.postInvalidate(); |
| 45 } |
| 46 }, 0, 5); // 0 means no delay before the timer starts; 5 means repeat ev
ery 5 milliseconds |
| 47 } |
| 48 |
| 49 private class SkiaDrawView extends View { |
| 50 Bitmap fSkiaBitmap; |
| 51 public SkiaDrawView(Context ctx) { |
| 52 super(ctx); |
| 53 } |
| 54 |
| 55 @Override |
| 56 protected void onSizeChanged(int w, int h, int oldw, int oldh) |
| 57 { |
| 58 // Create a bitmap for skia to draw into |
| 59 fSkiaBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); |
| 60 } |
| 61 |
| 62 @Override |
| 63 protected void onDraw(Canvas canvas) { |
| 64 // Call into our C++ code that renders to the bitmap using Skia |
| 65 drawIntoBitmap(fSkiaBitmap, SystemClock.elapsedRealtime()); |
| 66 |
| 67 // Present the bitmap on the screen |
| 68 canvas.drawBitmap(fSkiaBitmap, 0, 0, null); |
| 69 } |
| 70 } |
| 71 |
| 72 |
| 73 private native void drawIntoBitmap(Bitmap image, long elapsedTime); |
| 74 } |
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