android 动态壁纸源码

package ca.jvsh.livewallpaper; import android.content.SharedPreferences; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.drawable.GradientDrawable; import android.graphics.drawable.GradientDrawable.Orientation; import android.os.Handler; import android.service.wallpaper.WallpaperService; import android.util.DisplayMetrics; import android.view.Display; import android.view.MotionEvent; import android.view.Surface; import android.view.SurfaceHolder; import android.view.WindowManager; public class LiveWallpaper extends WallpaperService { public static final String SHARED_PREFS_NAME = "livewallpapersettings"; @Override public void onCreate() { super.onCreate(); } @Override public void onDestroy() { super.onDestroy(); } @Override public Engine onCreateEngine() { return new TestPatternEngine(); } class TestPatternEngine extends Engine implements SharedPreferences.OnSharedPreferenceChangeListener { private final Handler mHandler = new Handler(); private float mTouchX = -1; private float mTouchY = -1; private final Paint mPaint = new Paint(); private final Runnable mDrawPattern = new Runnable() { public void run() { drawFrame(); } }; private boolean mVisible; private SharedPreferences mPreferences; private Rect mRectFrame; private Rect[] mColorRectangles; private int[] rectColor; private int mRectCount; // private private Rect mGradientRect; GradientDrawable mGradient; private boolean mHorizontal = false; private int mFrameCounter = 0; private boolean mMotion = true; private String mShape = "smpte"; TestPatternEngine() { final Paint paint = mPaint; paint.setColor(0xffffffff); paint.setAntiAlias(true); paint.setStrokeWidth(2); paint.setStrokeCap(Paint.Cap.ROUND); paint.setStyle(Paint.Style.STROKE); mPreferences = LiveWallpaper.this.getSharedPreferences(SHARED_PREFS_NAME, 0); mPreferences.registerOnSharedPreferenceChangeListener(this); onSharedPreferenceChanged(mPreferences, null); } public void onSharedPreferenceChanged(SharedPreferences prefs, String key) { mShape = prefs.getString("livewallpaper_testpattern", "smpte"); mMotion = prefs.getBoolean("livewallpaper_movement", true); readColors(); } private void readColors() { int pid = getResources().getIdentifier(mShape + "colors", "array", getPackageName()); rectColor = getResources().getIntArray(pid); mRectCount = rectColor.length; mColorRectangles = new Rect[mRectCount]; System.out.println("mRectCount "+mRectCount); initFrameParams(); } @Override public void onCreate(SurfaceHolder surfaceHolder) { super.onCreate(surfaceHolder); setTouchEventsEnabled(true); } @Override public void onDestroy() { super.onDestroy(); mHandler.removeCallbacks(mDrawPattern); } @Override public void onVisibilityChanged(boolean visible) { mVisible = visible; if (visible) { drawFrame(); } else { mHandler.removeCallbacks(mDrawPattern); } } @Override public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) { super.onSurfaceChanged(holder, format, width, height); initFrameParams(); drawFrame(); } @Override public void onSurfaceCreated(SurfaceHolder holder) { super.onSurfaceCreated(holder); } @Override public void onSurfaceDestroyed(SurfaceHolder holder) { super.onSurfaceDestroyed(holder); mVisible = false; mHandler.removeCallbacks(mDrawPattern); } @Override public void onOffsetsChanged(float xOffset, float yOffset, float xStep, float yStep, int xPixels, int yPixels) { drawFrame(); } /* * Store the position of the touch event so we can use it for drawing * later */ @Override public void onTouchEvent(MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_MOVE) { mTouchX = event.getX(); mTouchY = event.getY(); } else { mTouchX = -1; mTouchY = -1; } super.onTouchEvent(event); } /* * Draw one frame of the animation. This method gets called repeatedly * by posting a delayed Runnable. You can do any drawing you want in * here. This example draws a wireframe cube. */ void drawFrame() { final SurfaceHolder holder = getSurfaceHolder(); Canvas c = null; try { c = holder.lockCanvas(); if (c != null) { // draw something drawPattern(c); drawTouchPoint(c); } } finally { if (c != null) holder.unlockCanvasAndPost(c); } mHandler.removeCallbacks(mDrawPattern); if (mVisible) { mHandler.postDelayed(mDrawPattern, 1000 / 25); } } void drawPattern(Canvas c) { c.save(); c.drawColor(0xff000000); Paint paint = new Paint(); if (mMotion) { mFrameCounter++; if (mHorizontal) { int right; int left; if (mFrameCounter > mRectFrame.right) mFrameCounter = 0; for (int i = 0; i < mRectCount; i++) { paint.setColor(rectColor[i]); right = mColorRectangles[i].right + mFrameCounter; left = mColorRectangles[i].left + mFrameCounter; if(right > mRectFrame.right) { c.drawRect(left - mRectFrame.right, mColorRectangles[i].top, right - mRectFrame.right, mColorRectangles[i].bottom, paint); } if(left < mRectFrame.right) { c.drawRect(left, mColorRectangles[i].top, right, mColorRectangles[i].bottom, paint); } } if(mShape.compareToIgnoreCase("smpte") == 0) { right =mGradientRect.right + mFrameCounter; left = mGradientRect.left + mFrameCounter; if(right > mRectFrame.right) { mGradient.setBounds(left - mRectFrame.right, mGradientRect.top, right - mRectFrame.right, mGradientRect.bottom); mGradient.draw(c); } if(left < mRectFrame.right) { mGradient.setBounds(left, mGradientRect.top, right, mGradientRect.bottom); mGradient.draw(c); } } } else { int top; int bottom; if (mFrameCounter > mRectFrame.bottom) mFrameCounter = 0; for (int i = 0; i < mRectCount; i++) { paint.setColor(rectColor[i]); top = mColorRectangles[i].top + mFrameCounter; bottom = mColorRectangles[i].bottom + mFrameCounter; if(bottom > mRectFrame.bottom) { c.drawRect(mColorRectangles[i].left, top - mRectFrame.bottom, mColorRectangles[i].right, bottom - mRectFrame.bottom, paint); } if(top < mRectFrame.bottom) { c.drawRect(mColorRectangles[i].left, top, mColorRectangles[i].right, bottom, paint); } } if(mShape.compareToIgnoreCase("smpte") == 0) { top = mGradientRect.top + mFrameCounter; bottom = mGradientRect.bottom + mFrameCounter; if(bottom > mRectFrame.bottom) { mGradient.setBounds(mGradientRect.left, top - mRectFrame.bottom, mGradientRect.right, bottom - mRectFrame.bottom); mGradient.draw(c); } if(top < mRectFrame.bottom) { mGradient.setBounds(mGradientRect.left, top, mGradientRect.right, bottom); mGradient.draw(c); } } } } else { for (int i = 0; i < mRectCount; i++) { paint.setColor(rectColor[i]); c.drawRect(mColorRectangles[i], paint); } if(mShape.compareToIgnoreCase("smpte") == 0) { mGradient.setBounds(mGradientRect); mGradient.draw(c); } } c.restore(); } void drawTouchPoint(Canvas c) { if (mTouchX >= 0 && mTouchY >= 0) { c.drawCircle(mTouchX, mTouchY, 40, mPaint); } } void initFrameParams() { DisplayMetrics metrics = new DisplayMetrics(); Display display = ((WindowManager) getSystemSer