Android 5.1 彩蛋游戏分析
Android 5.1，设置-->关于手机-->Android版本，快速３击(三次单击时长之和要小于0.5s)，然后出来一个圆，单击５次，变成棒棒糖，每次单击都变色。单击５次后，长按棒棒糖的那个圆，会出来彩蛋的游戏。
下面讲解下这个游戏的实现：
首先在，Package/app/Settins 里面\res\xml\device_info_settings.xml
android:title="@string/firmware_version"
android:summary="@string/device_info_default"/>
是“Android版本”的布局
后台控制是在src\com\android\settings\DeviceInfoSettings.java
DeviceInfoSettings是一个Fragment，
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
if (preference.getKey().equals(KEY_FIRMWARE_VERSION)) {//KEY_FIRMWARE_VERSIONshi是“Android版本”的KEY
System.arraycopy(mHits, 1, mHits, 0, mHits.length-1);
mHits[mHits.length-1] = SystemClock.uptimeMillis();//SystemClock.uptimeMillis()从开机到现在的毫秒数（手机睡眠的时间不包括在内）；
if (mHits[0] >= (SystemClock.uptimeMillis()-500)) {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.setClassName("android",
com.android.internal.app.PlatLogoActivity.class.getName());
try {
startActivity(intent);//启动com.android.internal.app.PlatLogoActivity这个Activity
} catch (Exception e) {
Log.e(LOG_TAG, "Unable to start activity " + intent.toString());
}
}
}
然后找到在./frameworks/base/core/res/AndroidManifest.xml里面有 如下 找到./frameworks/base/core/java/com/android/internal/app/PlatLogoActivity.java 代码如下 package com.android.internal.app; 找com.android.internal.category.PLATLOGO 在./frameworks/base/packages/SystemUI/AndroidManifest.xml里面，如下 找到./frameworks/base/packages/SystemUI/src/com/android/systemui/egg/LLandActivity.java /frameworks/base/packages/SystemUI/src/com/android/systemui/egg里面有LLand.java和LLandActivity.java LLandActivity.java如下： package com.android.systemui.egg; LLand.java如下 package com.android.systemui.egg; 控制机器人跳跃以及翻滚，是通过view 的animate http://blog.csdn.net/lmj623565791/article/details/38067475 亮点一：这个游戏中的所有图都是通过xml文件画出来的矢量图 这些图是怎么通过xml文件画出来的呢？先看看下面的这个三角形是怎么画出来的，参考http://www.w3.org/TR/SVG11/paths.html#PathData specifies a path in the shape of a triangle. (The M indicates a moveto, the Ls indicate linetos, and the z indicates a closepath). 我们主要看 这里面还讲了如何画曲线，圆，椭圆形的图，要深究的话可以参考下。 下面来举几个例子 游戏中作为背景的白色星星，代码位于code\frameworks\base\packages\SystemUI\res\drawable\star.xml，如下
android:configChanges="orientation|keyboardHidden"
android:process=":ui">
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.ContentResolver;
import android.content.Intent;
import android.content.res.ColorStateList;
import android.graphics.Canvas;
import android.graphics.Outline;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.graphics.drawable.RippleDrawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.os.Bundle;
import android.provider.Settings;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewOutlineProvider;
import android.view.animation.PathInterpolator;
import android.widget.FrameLayout;
import android.widget.ImageView;
public class PlatLogoActivity extends Activity {
final static int[] FLAVORS = {//棒棒糖中圆的颜色
0xFF9C27B0, 0xFFBA68C8, // grape
0xFFFF9800, 0xFFFFB74D, // orange
0xFFF06292, 0xFFF8BBD0, // bubblegum
0xFFAFB42B, 0xFFCDDC39, // lime
0xFFFFEB3B, 0xFFFFF176, // lemon
0xFF795548, 0xFFA1887F, // mystery flavor
};
FrameLayout mLayout;
int mTapCount;
int mKeyCount;
PathInterpolator mInterpolator = new PathInterpolator(0f, 0f, 0.5f, 1f);
static int newColorIndex() {
return 2*((int) (Math.random()*FLAVORS.length/2));
}
Drawable makeRipple() {
final int idx = newColorIndex();
final ShapeDrawable popbg = new ShapeDrawable(new OvalShape());
popbg.getPaint().setColor(FLAVORS[idx]);
final RippleDrawable ripple = new RippleDrawable(
ColorStateList.valueOf(FLAVORS[idx+1]),
popbg, null);
return ripple;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLayout = new FrameLayout(this);
setContentView(mLayout);
}
@Override
public void onAttachedToWindow() {
final DisplayMetrics dm = getResources().getDisplayMetrics();
final float dp = dm.density;
final int size = (int)
(Math.min(Math.min(dm.widthPixels, dm.heightPixels), 600*dp) - 100*dp);
final View stick = new View(this) {
Paint mPaint = new Paint();
Path mShadow = new Path();
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
setWillNotDraw(false);
setOutlineProvider(new ViewOutlineProvider() {
@Override
public void getOutline(View view, Outline outline) {
outline.setRect(0, getHeight() / 2, getWidth(), getHeight());
}
});
}
@Override
public void onDraw(Canvas c) {
final int w = c.getWidth();
final int h = c.getHeight() / 2;
c.translate(0, h);
final GradientDrawable g = new GradientDrawable();
g.setOrientation(GradientDrawable.Orientation.LEFT_RIGHT);
g.setGradientCenter(w * 0.75f, 0);
g.setColors(new int[] { 0xFFFFFFFF, 0xFFAAAAAA });
g.setBounds(0, 0, w, h);
g.draw(c);
mPaint.setColor(0xFFAAAAAA);
mShadow.reset();
mShadow.moveTo(0,0);
mShadow.lineTo(w, 0);
mShadow.lineTo(w, size/2 + 1.5f*w);
mShadow.lineTo(0, size/2);
mShadow.close();
c.drawPath(mShadow, mPaint);
}
};
mLayout.addView(stick, new FrameLayout.LayoutParams((int) (32 * dp),
ViewGroup.LayoutParams.MATCH_PARENT, Gravity.CENTER_HORIZONTAL));
stick.setAlpha(0f);
final ImageView im = new ImageView(this);
im.setTranslationZ(20);
im.setScaleX(0);
im.setScaleY(0);
final Drawable platlogo = getDrawable(com.android.internal.R.drawable.platlogo);
platlogo.setAlpha(0);
im.setImageDrawable(platlogo);
im.setBackground(makeRipple());
im.setClickable(true);
final ShapeDrawable highlight = new ShapeDrawable(new OvalShape());
highlight.getPaint().setColor(0x10FFFFFF);
highlight.setBounds((int)(size*.15f), (int)(size*.15f),
(int)(size*.6f), (int)(size*.6f));
im.getOverlay().add(highlight);
im.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mTapCount == 0) {
im.animate()
.translationZ(40)
.scaleX(1)
.scaleY(1)
.setInterpolator(mInterpolator)
.setDuration(700)
.setStartDelay(500)
.start();
final ObjectAnimator a = ObjectAnimator.ofInt(platlogo, "alpha", 0, 255);
a.setInterpolator(mInterpolator);
a.setStartDelay(1000);
a.start();
stick.animate()
.translationZ(20)
.alpha(1)
.setInterpolator(mInterpolator)
.setDuration(700)
.setStartDelay(750)
.start();
im.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
if (mTapCount < 5) return false;//点击次数要大于等于5，之后长按才能进入游戏
final ContentResolver cr = getContentResolver();
if (Settings.System.getLong(cr, Settings.System.EGG_MODE, 0)
== 0) {
// For posterity: the moment this user unlocked the easter egg
Settings.System.putLong(cr,
Settings.System.EGG_MODE,
System.currentTimeMillis());
}
im.post(new Runnable() {
@Override
public void run() {
try {
startActivity(new Intent(Intent.ACTION_MAIN)
.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TASK
| Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS)
.addCategory("com.android.internal.category.PLATLOGO"));//启动com.android.internal.category.PLATLOGO
} catch (ActivityNotFoundException ex) {
Log.e("PlatLogoActivity", "No more eggs.");
}
finish();
}
});
return true;
}
});
} else {
im.setBackground(makeRipple());
}
mTapCount++;
}
});
// Enable hardware keyboard input for TV compatibility.
im.setFocusable(true);
im.requestFocus();
im.setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode != KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN) {
++mKeyCount;
if (mKeyCount > 2) {
if (mTapCount > 5) {
im.performLongClick();
} else {
im.performClick();
}
}
return true;
} else {
return false;
}
}
});
mLayout.addView(im, new FrameLayout.LayoutParams(size, size, Gravity.CENTER));
im.animate().scaleX(0.3f).scaleY(0.3f)
.setInterpolator(mInterpolator)
.setDuration(500)
.setStartDelay(800)
.start();
}
}
android:exported="true"
android:label="@string/lland"
android:hardwareAccelerated="true"
android:launchMode="singleInstance"
android:screenOrientation="locked"
android:process=":sweetsweetdesserts"
android:excludeFromRecents="true">
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import com.android.systemui.R;
public class LLandActivity extends Activity {
LLand mLand;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.lland);
mLand = (LLand) findViewById(R.id.world);
mLand.setScoreField((TextView) findViewById(R.id.score));
mLand.setSplash(findViewById(R.id.welcome));
//Log.v(LLand.TAG, "focus: " + mLand.requestFocus());
}
@Override
public void onPause() {
mLand.stop();
super.onPause();
}
}
import android.animation.TimeAnimator;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Outline;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.media.AudioAttributes;
import android.media.AudioManager;
import android.os.Vibrator;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.util.Slog;
import android.view.View;
import android.view.ViewOutlineProvider;
import android.view.animation.DecelerateInterpolator;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;
import com.android.systemui.R;
import java.util.ArrayList;
public class LLand extends FrameLayout {
public static final String TAG = "LLand";
public static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
public static final boolean DEBUG_DRAW = false; // DEBUG
public static void L(String s, Object ... objects) {
if (DEBUG) {
Slog.d(TAG, objects.length == 0 ? s : String.format(s, objects));
}
}
public static final boolean AUTOSTART = true;
public static final boolean HAVE_STARS = true;
public static final float DEBUG_SPEED_MULTIPLIER = 1f; // 0.1f;
public static final boolean DEBUG_IDDQD = Log.isLoggable(TAG + ".iddqd", Log.DEBUG);
final static int[] POPS = {
// resid // spinny! // alpha
R.drawable.pop_belt, 0, 255,
R.drawable.pop_droid, 0, 255,
R.drawable.pop_pizza, 1, 255,
R.drawable.pop_stripes, 0, 255,
R.drawable.pop_swirl, 1, 255,
R.drawable.pop_vortex, 1, 255,
R.drawable.pop_vortex2, 1, 255,
R.drawable.pop_ball, 0, 190,
};
private static class Params {
public float TRANSLATION_PER_SEC;
public int OBSTACLE_SPACING, OBSTACLE_PERIOD;
public int BOOST_DV;
public int PLAYER_HIT_SIZE;
public int PLAYER_SIZE;
public int OBSTACLE_WIDTH, OBSTACLE_STEM_WIDTH;
public int OBSTACLE_GAP;
public int OBSTACLE_MIN;
public int BUILDING_WIDTH_MIN, BUILDING_WIDTH_MAX;
public int BUILDING_HEIGHT_MIN;
public int CLOUD_SIZE_MIN, CLOUD_SIZE_MAX;
public int STAR_SIZE_MIN, STAR_SIZE_MAX;
public int G;
public int MAX_V;
public float SCENERY_Z, OBSTACLE_Z, PLAYER_Z, PLAYER_Z_BOOST, HUD_Z;
public Params(Resources res) {
TRANSLATION_PER_SEC = res.getDimension(R.dimen.translation_per_sec);
OBSTACLE_SPACING = res.getDimensionPixelSize(R.dimen.obstacle_spacing);
OBSTACLE_PERIOD = (int) (OBSTACLE_SPACING / TRANSLATION_PER_SEC);
BOOST_DV = res.getDimensionPixelSize(R.dimen.boost_dv);
PLAYER_HIT_SIZE = res.getDimensionPixelSize(R.dimen.player_hit_size);
PLAYER_SIZE = res.getDimensionPixelSize(R.dimen.player_size);
OBSTACLE_WIDTH = res.getDimensionPixelSize(R.dimen.obstacle_width);
OBSTACLE_STEM_WIDTH = res.getDimensionPixelSize(R.dimen.obstacle_stem_width);
OBSTACLE_GAP = res.getDimensionPixelSize(R.dimen.obstacle_gap);
OBSTACLE_MIN = res.getDimensionPixelSize(R.dimen.obstacle_height_min);
BUILDING_HEIGHT_MIN = res.getDimensionPixelSize(R.dimen.building_height_min);
BUILDING_WIDTH_MIN = res.getDimensionPixelSize(R.dimen.building_width_min);
BUILDING_WIDTH_MAX = res.getDimensionPixelSize(R.dimen.building_width_max);
CLOUD_SIZE_MIN = res.getDimensionPixelSize(R.dimen.cloud_size_min);
CLOUD_SIZE_MAX = res.getDimensionPixelSize(R.dimen.cloud_size_max);
STAR_SIZE_MIN = res.getDimensionPixelSize(R.dimen.star_size_min);
STAR_SIZE_MAX = res.getDimensionPixelSize(R.dimen.star_size_max);
G = res.getDimensionPixelSize(R.dimen.G);
MAX_V = res.getDimensionPixelSize(R.dimen.max_v);
SCENERY_Z = res.getDimensionPixelSize(R.dimen.scenery_z);
OBSTACLE_Z = res.getDimensionPixelSize(R.dimen.obstacle_z);
PLAYER_Z = res.getDimensionPixelSize(R.dimen.player_z);
PLAYER_Z_BOOST = res.getDimensionPixelSize(R.dimen.player_z_boost);
HUD_Z = res.getDimensionPixelSize(R.dimen.hud_z);
// Sanity checking
if (OBSTACLE_MIN <= OBSTACLE_WIDTH / 2) {
Slog.e(TAG, "error: obstacles might be too short, adjusting");
OBSTACLE_MIN = OBSTACLE_WIDTH / 2 + 1;
}
}
}
private TimeAnimator mAnim;
private Vibrator mVibrator;
private AudioManager mAudioManager;
private final AudioAttributes mAudioAttrs = new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_GAME).build();
private TextView mScoreField;
private View mSplash;
private Player mDroid;
private ArrayList
private float t, dt;
private int mScore;
private float mLastPipeTime; // in sec
private int mWidth, mHeight;
private boolean mAnimating, mPlaying;
private boolean mFrozen; // after death, a short backoff
private boolean mFlipped;
private int mTimeOfDay;
private static final int DAY = 0, NIGHT = 1, TWILIGHT = 2, SUNSET = 3;
private static final int[][] SKIES = {
{ 0xFFc0c0FF, 0xFFa0a0FF }, // DAY
{ 0xFF000010, 0xFF000000 }, // NIGHT
{ 0xFF000040, 0xFF000010 }, // TWILIGHT
{ 0xFFa08020, 0xFF204080 }, // SUNSET
};
private static Params PARAMS;
public LLand(Context context) {
this(context, null);
}
public LLand(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public LLand(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mVibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
setFocusable(true);
PARAMS = new Params(getResources());
mTimeOfDay = irand(0, SKIES.length);
// we assume everything will be laid out left|top
setLayoutDirection(LAYOUT_DIRECTION_LTR);
}
@Override
public boolean willNotDraw() {
return !DEBUG;
}
public int getGameWidth() { return mWidth; }
public int getGameHeight() { return mHeight; }
public float getGameTime() { return t; }
public float getLastTimeStep() { return dt; }
public void setScoreField(TextView tv) {
mScoreField = tv;
if (tv != null) {
tv.setTranslationZ(PARAMS.HUD_Z);
if (!(mAnimating && mPlaying)) {
tv.setTranslationY(-500);
}
}
}
public void setSplash(View v) {
mSplash = v;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
stop();
reset();
if (AUTOSTART) {
start(false);
}
}
final float hsv[] = {0, 0, 0};
private void thump() {
if (mAudioManager.getRingerMode() == AudioManager.RINGER_MODE_SILENT) {
// No interruptions. Not even game haptics.
return;
}
mVibrator.vibrate(80, mAudioAttrs);
}
public void reset() {
L("reset");
final Drawable sky = new GradientDrawable(
GradientDrawable.Orientation.BOTTOM_TOP,
SKIES[mTimeOfDay]
);
sky.setDither(true);
setBackground(sky);
mFlipped = frand() > 0.5f;
setScaleX(mFlipped ? -1 : 1);
setScore(0);
int i = getChildCount();
while (i-->0) {
final View v = getChildAt(i);
if (v instanceof GameView) {
removeViewAt(i);
}
}
mObstaclesInPlay.clear();
mWidth = getWidth();
mHeight = getHeight();
boolean showingSun = (mTimeOfDay == DAY || mTimeOfDay == SUNSET) && frand() > 0.25;
if (showingSun) {
final Star sun = new Star(getContext());
sun.setBackgroundResource(R.drawable.sun);
final int w = getResources().getDimensionPixelSize(R.dimen.sun_size);
sun.setTranslationX(frand(w, mWidth-w));
if (mTimeOfDay == DAY) {
sun.setTranslationY(frand(w, (mHeight * 0.66f)));
sun.getBackground().setTint(0);
} else {
sun.setTranslationY(frand(mHeight * 0.66f, mHeight - w));
sun.getBackground().setTintMode(PorterDuff.Mode.SRC_ATOP);
sun.getBackground().setTint(0xC0FF8000);
}
addView(sun, new LayoutParams(w, w));
}
if (!showingSun) {
final boolean dark = mTimeOfDay == NIGHT || mTimeOfDay == TWILIGHT;
final float ff = frand();
if ((dark && ff < 0.75f) || ff < 0.5f) {
final Star moon = new Star(getContext());
moon.setBackgroundResource(R.drawable.moon);
moon.getBackground().setAlpha(dark ? 255 : 128);
moon.setScaleX(frand() > 0.5 ? -1 : 1);
moon.setRotation(moon.getScaleX() * frand(5, 30));
final int w = getResources().getDimensionPixelSize(R.dimen.sun_size);
moon.setTranslationX(frand(w, mWidth - w));
moon.setTranslationY(frand(w, mHeight - w));
addView(moon, new LayoutParams(w, w));
}
}
final int mh = mHeight / 6;
final boolean cloudless = frand() < 0.25;
final int N = 20;
for (i=0; i
final Scenery s;
if (HAVE_STARS && r1 < 0.3 && mTimeOfDay != DAY) {
s = new Star(getContext());
} else if (r1 < 0.6 && !cloudless) {
s = new Cloud(getContext());
} else {
s = new Building(getContext());
s.z = (float)i/N;
s.setTranslationZ(PARAMS.SCENERY_Z * (1+s.z));
s.v = 0.85f * s.z; // buildings move proportional to their distance
hsv[0] = 175;
hsv[1] = 0.25f;
hsv[2] = 1 * s.z;
s.setBackgroundColor(Color.HSVToColor(hsv));
s.h = irand(PARAMS.BUILDING_HEIGHT_MIN, mh);
}
final LayoutParams lp = new LayoutParams(s.w, s.h);
if (s instanceof Building) {
lp.gravity = Gravity.BOTTOM;
} else {
lp.gravity = Gravity.TOP;
final float r = frand();
if (s instanceof Star) {
lp.topMargin = (int) (r * r * mHeight);
} else {
lp.topMargin = (int) (1 - r*r * mHeight/2) + mHeight/2;
}
}
addView(s, lp);
s.setTranslationX(frand(-lp.width, mWidth + lp.width));
}
mDroid = new Player(getContext());
mDroid.setX(mWidth / 2);
mDroid.setY(mHeight / 2);
addView(mDroid, new LayoutParams(PARAMS.PLAYER_SIZE, PARAMS.PLAYER_SIZE));
mAnim = new TimeAnimator();
mAnim.setTimeListener(new TimeAnimator.TimeListener() {
@Override
public void onTimeUpdate(TimeAnimator timeAnimator, long t, long dt) {
step(t, dt);
}
});
}
private void setScore(int score) {
mScore = score;
if (mScoreField != null) {
mScoreField.setText(DEBUG_IDDQD ? "??" : String.valueOf(score));
}
}
private void addScore(int incr) {
setScore(mScore + incr);
}
public void start(boolean startPlaying) {
L("start(startPlaying=%s)", startPlaying?"true":"false");
if (startPlaying) {
mPlaying = true;
t = 0;
// there's a sucker born every OBSTACLE_PERIOD
mLastPipeTime = getGameTime() - PARAMS.OBSTACLE_PERIOD;
if (mSplash != null && mSplash.getAlpha() > 0f) {
mSplash.setTranslationZ(PARAMS.HUD_Z);
mSplash.animate().alpha(0).translationZ(0).setDuration(400);
mScoreField.animate().translationY(0)
.setInterpolator(new DecelerateInterpolator())
.setDuration(1500);
}
mScoreField.setTextColor(0xFFAAAAAA);
mScoreField.setBackgroundResource(R.drawable.scorecard);
mDroid.setVisibility(View.VISIBLE);
mDroid.setX(mWidth / 2);
mDroid.setY(mHeight / 2);
} else {
mDroid.setVisibility(View.GONE);
}
if (!mAnimating) {
mAnim.start();
mAnimating = true;
}
}
public void stop() {
if (mAnimating) {
mAnim.cancel();
mAnim = null;
mAnimating = false;
mScoreField.setTextColor(0xFFFFFFFF);
mScoreField.setBackgroundResource(R.drawable.scorecard_gameover);
mTimeOfDay = irand(0, SKIES.length); // for next reset
mFrozen = true;
postDelayed(new Runnable() {
@Override
public void run() {
mFrozen = false;
}
}, 250);
}
}
public static final float lerp(float x, float a, float b) {
return (b - a) * x + a;
}
public static final float rlerp(float v, float a, float b) {
return (v - a) / (b - a);
}
public static final float clamp(float f) {
return f < 0f ? 0f : f > 1f ? 1f : f;
}
public static final float frand() {
return (float) Math.random();
}
public static final float frand(float a, float b) {
return lerp(frand(), a, b);
}
public static final int irand(int a, int b) {
return (int) lerp(frand(), (float) a, (float) b);
}
private void step(long t_ms, long dt_ms) {
t = t_ms / 1000f; // seconds
dt = dt_ms / 1000f;
if (DEBUG) {
t *= DEBUG_SPEED_MULTIPLIER;
dt *= DEBUG_SPEED_MULTIPLIER;
}
// 1. Move all objects and update bounds
final int N = getChildCount();
int i = 0;
for (; i
if (v instanceof GameView) {
((GameView) v).step(t_ms, dt_ms, t, dt);
}
}
// 2. Check for altitude
if (mPlaying && mDroid.below(mHeight)) {
if (DEBUG_IDDQD) {
poke();
unpoke();
} else {
L("player hit the floor");
thump();
stop();
}
}
// 3. Check for obstacles
boolean passedBarrier = false;
for (int j = mObstaclesInPlay.size(); j-->0;) {
final Obstacle ob = mObstaclesInPlay.get(j);
if (mPlaying && ob.intersects(mDroid) && !DEBUG_IDDQD) {
L("player hit an obstacle");
thump();
stop();
} else if (ob.cleared(mDroid)) {
if (ob instanceof Stem) passedBarrier = true;
mObstaclesInPlay.remove(j);
}
}
if (mPlaying && passedBarrier) {
addScore(1);
}
// 4. Handle edge of screen
// Walk backwards to make sure removal is safe
while (i-->0) {
final View v = getChildAt(i);
if (v instanceof Obstacle) {
if (v.getTranslationX() + v.getWidth() < 0) {
removeViewAt(i);
}
} else if (v instanceof Scenery) {
final Scenery s = (Scenery) v;
if (v.getTranslationX() + s.w < 0) {
v.setTranslationX(getWidth());
}
}
}
// 3. Time for more obstacles!
if (mPlaying && (t - mLastPipeTime) > PARAMS.OBSTACLE_PERIOD) {
mLastPipeTime = t;
final int obstacley =
(int)(frand() * (mHeight - 2*PARAMS.OBSTACLE_MIN - PARAMS.OBSTACLE_GAP)) +
PARAMS.OBSTACLE_MIN;
final int inset = (PARAMS.OBSTACLE_WIDTH - PARAMS.OBSTACLE_STEM_WIDTH) / 2;
final int yinset = PARAMS.OBSTACLE_WIDTH/2;
final int d1 = irand(0,250);
final Obstacle s1 = new Stem(getContext(), obstacley - yinset, false);
addView(s1, new LayoutParams(
PARAMS.OBSTACLE_STEM_WIDTH,
(int) s1.h,
Gravity.TOP|Gravity.LEFT));
s1.setTranslationX(mWidth+inset);
s1.setTranslationY(-s1.h-yinset);
s1.setTranslationZ(PARAMS.OBSTACLE_Z*0.75f);
s1.animate()
.translationY(0)
.setStartDelay(d1)
.setDuration(250);
mObstaclesInPlay.add(s1);
final Obstacle p1 = new Pop(getContext(), PARAMS.OBSTACLE_WIDTH);
addView(p1, new LayoutParams(
PARAMS.OBSTACLE_WIDTH,
PARAMS.OBSTACLE_WIDTH,
Gravity.TOP|Gravity.LEFT));
p1.setTranslationX(mWidth);
p1.setTranslationY(-PARAMS.OBSTACLE_WIDTH);
p1.setTranslationZ(PARAMS.OBSTACLE_Z);
p1.setScaleX(0.25f);
p1.setScaleY(0.25f);
p1.animate()
.translationY(s1.h-inset)
.scaleX(1f)
.scaleY(1f)
.setStartDelay(d1)
.setDuration(250);
mObstaclesInPlay.add(p1);
final int d2 = irand(0,250);
final Obstacle s2 = new Stem(getContext(),
mHeight - obstacley - PARAMS.OBSTACLE_GAP - yinset,
true);
addView(s2, new LayoutParams(
PARAMS.OBSTACLE_STEM_WIDTH,
(int) s2.h,
Gravity.TOP|Gravity.LEFT));
s2.setTranslationX(mWidth+inset);
s2.setTranslationY(mHeight+yinset);
s2.setTranslationZ(PARAMS.OBSTACLE_Z*0.75f);
s2.animate()
.translationY(mHeight-s2.h)
.setStartDelay(d2)
.setDuration(400);
mObstaclesInPlay.add(s2);
final Obstacle p2 = new Pop(getContext(), PARAMS.OBSTACLE_WIDTH);
addView(p2, new LayoutParams(
PARAMS.OBSTACLE_WIDTH,
PARAMS.OBSTACLE_WIDTH,
Gravity.TOP|Gravity.LEFT));
p2.setTranslationX(mWidth);
p2.setTranslationY(mHeight);
p2.setTranslationZ(PARAMS.OBSTACLE_Z);
p2.setScaleX(0.25f);
p2.setScaleY(0.25f);
p2.animate()
.translationY(mHeight-s2.h-yinset)
.scaleX(1f)
.scaleY(1f)
.setStartDelay(d2)
.setDuration(400);
mObstaclesInPlay.add(p2);
}
if (DEBUG_DRAW) invalidate();
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
L("touch: %s", ev);
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
poke();
return true;
case MotionEvent.ACTION_UP:
unpoke();
return true;
}
return false;
}
@Override
public boolean onTrackballEvent(MotionEvent ev) {
L("trackball: %s", ev);
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
poke();
return true;
case MotionEvent.ACTION_UP:
unpoke();
return true;
}
return false;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent ev) {
L("keyDown: %d", keyCode);
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_CENTER:
case KeyEvent.KEYCODE_DPAD_UP:
case KeyEvent.KEYCODE_SPACE:
case KeyEvent.KEYCODE_ENTER:
case KeyEvent.KEYCODE_BUTTON_A:
poke();
return true;
}
return false;
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent ev) {
L("keyDown: %d", keyCode);
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_CENTER:
case KeyEvent.KEYCODE_DPAD_UP:
case KeyEvent.KEYCODE_SPACE:
case KeyEvent.KEYCODE_ENTER:
case KeyEvent.KEYCODE_BUTTON_A:
unpoke();
return true;
}
return false;
}
@Override
public boolean onGenericMotionEvent (MotionEvent ev) {
L("generic: %s", ev);
return false;
}
private void poke() {
L("poke");
if (mFrozen) return;
if (!mAnimating) {
reset();
start(true);
} else if (!mPlaying) {
start(true);
}
mDroid.boost();
if (DEBUG) {
mDroid.dv *= DEBUG_SPEED_MULTIPLIER;
mDroid.animate().setDuration((long) (200/DEBUG_SPEED_MULTIPLIER));
}
}
private void unpoke() {
L("unboost");
if (mFrozen) return;
if (!mAnimating) return;
mDroid.unboost();
}
@Override
public void onDraw(Canvas c) {
super.onDraw(c);
if (!DEBUG_DRAW) return;
final Paint pt = new Paint();
pt.setColor(0xFFFFFFFF);
final int L = mDroid.corners.length;
final int N = L/2;
for (int i=0; i
final int y = (int) mDroid.corners[i*2+1];
c.drawCircle(x, y, 4, pt);
c.drawLine(x, y,
mDroid.corners[(i*2+2)%L],
mDroid.corners[(i*2+3)%L],
pt);
}
pt.setStyle(Paint.Style.STROKE);
pt.setStrokeWidth(getResources().getDisplayMetrics().density);
final int M = getChildCount();
pt.setColor(0x8000FF00);
for (int i=0; i
if (v == mDroid) continue;
if (!(v instanceof GameView)) continue;
if (v instanceof Pop) {
final Pop p = (Pop) v;
c.drawCircle(p.cx, p.cy, p.r, pt);
} else {
final Rect r = new Rect();
v.getHitRect(r);
c.drawRect(r, pt);
}
}
pt.setColor(Color.BLACK);
final StringBuilder sb = new StringBuilder("obstacles: ");
for (Obstacle ob : mObstaclesInPlay) {
sb.append(ob.hitRect.toShortString());
sb.append(" ");
}
pt.setTextSize(20f);
c.drawText(sb.toString(), 20, 100, pt);
}
static final Rect sTmpRect = new Rect();
private interface GameView {
public void step(long t_ms, long dt_ms, float t, float dt);
}
private class Player extends ImageView implements GameView {
public float dv;
private boolean mBoosting;
private final int[] sColors = new int[] {
0xFF78C557,
};
private final float[] sHull = new float[] {
0.3f, 0f, // left antenna
0.7f, 0f, // right antenna
0.92f, 0.33f, // off the right shoulder of Orion
0.92f, 0.75f, // right hand (our right, not his right)
0.6f, 1f, // right foot
0.4f, 1f, // left foot BLUE!
0.08f, 0.75f, // sinistram
0.08f, 0.33f, // cold shoulder
};
public final float[] corners = new float[sHull.length];
public Player(Context context) {
super(context);
setBackgroundResource(R.drawable.android);
getBackground().setTintMode(PorterDuff.Mode.SRC_ATOP);
getBackground().setTint(sColors[0]);
setOutlineProvider(new ViewOutlineProvider() {
@Override
public void getOutline(View view, Outline outline) {
final int w = view.getWidth();
final int h = view.getHeight();
final int ix = (int) (w * 0.3f);
final int iy = (int) (h * 0.2f);
outline.setRect(ix, iy, w - ix, h - iy);
}
});
}
public void prepareCheckIntersections() {
final int inset = (PARAMS.PLAYER_SIZE - PARAMS.PLAYER_HIT_SIZE)/2;
final int scale = PARAMS.PLAYER_HIT_SIZE;
final int N = sHull.length/2;
for (int i=0; i
corners[i*2+1] = scale * sHull[i*2+1] + inset;
}
final Matrix m = getMatrix();
m.mapPoints(corners);
}
public boolean below(int h) {
final int N = corners.length/2;
for (int i=0; i
if (y >= h) return true;
}
return false;
}
public void step(long t_ms, long dt_ms, float t, float dt) {
if (getVisibility() != View.VISIBLE) return; // not playing yet
if (mBoosting) {
dv = -PARAMS.BOOST_DV;
} else {
dv += PARAMS.G;
}
if (dv < -PARAMS.MAX_V) dv = -PARAMS.MAX_V;
else if (dv > PARAMS.MAX_V) dv = PARAMS.MAX_V;
final float y = getTranslationY() + dv * dt;
setTranslationY(y < 0 ? 0 : y);
setRotation(
90 + lerp(clamp(rlerp(dv, PARAMS.MAX_V, -1 * PARAMS.MAX_V)), 90, -90));
prepareCheckIntersections();
}
public void boost() {
mBoosting = true;
dv = -PARAMS.BOOST_DV;
animate().cancel();
animate()
.scaleX(1.25f)
.scaleY(1.25f)
.translationZ(PARAMS.PLAYER_Z_BOOST)
.setDuration(100);
setScaleX(1.25f);
setScaleY(1.25f);
}
public void unboost() {
mBoosting = false;
animate().cancel();
animate()
.scaleX(1f)
.scaleY(1f)
.translationZ(PARAMS.PLAYER_Z)
.setDuration(200);
}
}
private class Obstacle extends View implements GameView {
public float h;
public final Rect hitRect = new Rect();
public Obstacle(Context context, float h) {
super(context);
setBackgroundColor(0xFFFF0000);
this.h = h;
}
public boolean intersects(Player p) {
final int N = p.corners.length/2;
for (int i=0; i
final int y = (int) p.corners[i*2+1];
if (hitRect.contains(x, y)) return true;
}
return false;
}
public boolean cleared(Player p) {
final int N = p.corners.length/2;
for (int i=0; i
if (hitRect.right >= x) return false;
}
return true;
}
@Override
public void step(long t_ms, long dt_ms, float t, float dt) {
setTranslationX(getTranslationX()-PARAMS.TRANSLATION_PER_SEC*dt);
getHitRect(hitRect);
}
}
private class Pop extends Obstacle {
int mRotate;
int cx, cy, r;
public Pop(Context context, float h) {
super(context, h);
int idx = 3*irand(0, POPS.length/3);
setBackgroundResource(POPS[idx]);
setAlpha((float)(POPS[idx+2])/255);
setScaleX(frand() < 0.5f ? -1 : 1);
mRotate = POPS[idx+1] == 0 ? 0 : (frand() < 0.5f ? -1 : 1);
setOutlineProvider(new ViewOutlineProvider() {
@Override
public void getOutline(View view, Outline outline) {
final int pad = (int) (getWidth() * 0.02f);
outline.setOval(pad, pad, getWidth()-pad, getHeight()-pad);
}
});
}
public boolean intersects(Player p) {
final int N = p.corners.length/2;
for (int i=0; i
final int y = (int) p.corners[i*2+1];
if (Math.hypot(x-cx, y-cy) <= r) return true;
}
return false;
}
@Override
public void step(long t_ms, long dt_ms, float t, float dt) {
super.step(t_ms, dt_ms, t, dt);
if (mRotate != 0) {
setRotation(getRotation() + dt * 45 * mRotate);
}
cx = (hitRect.left + hitRect.right)/2;
cy = (hitRect.top + hitRect.bottom)/2;
r = getWidth()/2;
}
}
private class Stem extends Obstacle {
Paint mPaint = new Paint();
Path mShadow = new Path();
boolean mDrawShadow;
public Stem(Context context, float h, boolean drawShadow) {
super(context, h);
mDrawShadow = drawShadow;
mPaint.setColor(0xFFAAAAAA);
setBackground(null);
}
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
setWillNotDraw(false);
setOutlineProvider(new ViewOutlineProvider() {
@Override
public void getOutline(View view, Outline outline) {
outline.setRect(0, 0, getWidth(), getHeight());
}
});
}
@Override
public void onDraw(Canvas c) {
final int w = c.getWidth();
final int h = c.getHeight();
final GradientDrawable g = new GradientDrawable();
g.setOrientation(GradientDrawable.Orientation.LEFT_RIGHT);
g.setGradientCenter(w * 0.75f, 0);
g.setColors(new int[] { 0xFFFFFFFF, 0xFFAAAAAA });
g.setBounds(0, 0, w, h);
g.draw(c);
if (!mDrawShadow) return;
mShadow.reset();
mShadow.moveTo(0,0);
mShadow.lineTo(w, 0);
mShadow.lineTo(w, PARAMS.OBSTACLE_WIDTH/2+w*1.5f);
mShadow.lineTo(0, PARAMS.OBSTACLE_WIDTH/2);
mShadow.close();
c.drawPath(mShadow, mPaint);
}
}
private class Scenery extends FrameLayout implements GameView {
public float z;
public float v;
public int h, w;
public Scenery(Context context) {
super(context);
}
@Override
public void step(long t_ms, long dt_ms, float t, float dt) {
setTranslationX(getTranslationX() - PARAMS.TRANSLATION_PER_SEC * dt * v);
}
}
private class Building extends Scenery {
public Building(Context context) {
super(context);
w = irand(PARAMS.BUILDING_WIDTH_MIN, PARAMS.BUILDING_WIDTH_MAX);
h = 0; // will be setup later, along with z
setTranslationZ(PARAMS.SCENERY_Z);
}
}
private class Cloud extends Scenery {
public Cloud(Context context) {
super(context);
setBackgroundResource(frand() < 0.01f ? R.drawable.cloud_off : R.drawable.cloud);
getBackground().setAlpha(0x40);
w = h = irand(PARAMS.CLOUD_SIZE_MIN, PARAMS.CLOUD_SIZE_MAX);
z = 0;
v = frand(0.15f,0.5f);
}
}
private class Star extends Scenery {
public Star(Context context) {
super(context);
setBackgroundResource(R.drawable.star);
w = h = irand(PARAMS.STAR_SIZE_MIN, PARAMS.STAR_SIZE_MAX);
v = z = 0;
}
}
}
这里是实现的核心，看上面的注释---he M indicates a moveto, the Ls indicate linetos, and the z indicates a closepath
M表示移动到，L表示开始画线，Z表示结束画笔的路径。 大写表示绝对位置，小写表示相对位置
这样一条路走完之后，将起点和终点连接起来的一个封闭的图形就是一个三角形
android:height="48.0dp"
android:viewportWidth="48.0"
android:viewportHeight="48.0">
android:fillColor="#FFFFFF"/>