Android播放gif动画,增加屏幕掉金币效果

public class MainActivity extends Activity implements OnClickListener {
private FlakeView flakeView;//金币掉落动画的主体动画
private GifView imageView;
private Button button_stop1;
private PopupWindow pop;

//---------------------------------------------------------------------------------------------
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

button_stop1=(Button) findViewById(R.id.button_stop1);
imageView=(GifView) findViewById(R.id.imageView);

imageView.setMovieResource(R.raw.icon_thank_lord_longen); // 设置背景gif图片资源

flakeView = new FlakeView(this);
final LinearLayout container = (LinearLayout) findViewById(R.id.container);
container.addView(flakeView); //将flakeView 添加到布局中
flakeView.addFlakes(50);//设置同时出现在屏幕上的金币数量  建议64以内 过多会引起卡顿

/**
* 绘制的类型
* @see View.LAYER_TYPE_HARDWARE
* @see View.LAYER_TYPE_SOFTWARE
* @see View.LAYER_TYPE_NONE
*/
flakeView.setLayerType(View.LAYER_TYPE_NONE, null);
pop = new PopupWindow(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
pop.setOutsideTouchable(true);
pop.setFocusable(true);
pop.showAtLocation(container,Gravity.CENTER,0,0);
MediaPlayer player = MediaPlayer.create(this, R.raw.shake);
player.start();

imageView.setOnGifPlayListener(new GifPlayListener(){
@Override
public void playFinish(){
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
pop.dismiss();
container.removeAllViews();
Toast.makeText(MainActivity.this,"播放完成", 0).show();
}
}, 500);
}
});
button_stop1.setOnClickListener(this);
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button_stop1:
if (imageView.isPaused()) {
imageView.setPaused(false);
}else {
imageView.setPaused(true);
}
break;
}
}
}

public class GifView extends View {
private static final int DEFAULT_MOVIE_DURATION = 1000;//默认为1秒
private GifPlayListener gifPlayListener;

private int mMovieResourceId;
private Movie mMovie;
private long mMovieStart;
private int mCurrentAnimationTime = 0;
private float mLeft;
private float mTop;
private float mScale;
private int mMeasuredMovieWidth;
private int mMeasuredMovieHeight;
private boolean mVisible = true;
private volatile boolean mPaused = false;

private int duration;

public GifView(Context context) {
this(context, null);
}

public GifView(Context context, AttributeSet attrs) {
this(context, attrs, R.styleable.CustomTheme_gifViewStyle);
}

public GifView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setViewAttributes(context, attrs, defStyle);
}

@SuppressLint("NewApi")
private void setViewAttributes(Context context, AttributeSet attrs,int defStyle) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
// 从描述文件中读出gif的值，创建出Movie实例
final TypedArray array = context.obtainStyledAttributes(attrs,R.styleable.GifView, defStyle, /*R.style.Widget_GifView*/0);
mMovieResourceId = array.getResourceId(R.styleable.GifView_gif, -1);
mPaused = array.getBoolean(R.styleable.GifView_paused, false);
array.recycle();
if (mMovieResourceId != -1) {
mMovie = Movie.decodeStream(getResources().openRawResource(mMovieResourceId));
}
}

/**
* 设置gif图资源
*
* @param movieResId
*/
public void setMovieResource(int movieResId) {
this.mMovieResourceId = movieResId;
mMovie = Movie.decodeStream(getResources().openRawResource(mMovieResourceId));
duration = mMovie.duration();//取出动画的时长
if (duration == 0) {
duration = DEFAULT_MOVIE_DURATION;
}
requestLayout();
}

public void setMovie(Movie movie) {
this.mMovie = movie;
requestLayout();
}

public Movie getMovie() {
return mMovie;
}

public void setMovieTime(int time) {
mCurrentAnimationTime = time;
invalidate();
}

/**
* 设置暂停
* @param paused
*/
public void setPaused(boolean paused) {
this.mPaused = paused;
if (!paused) {
mMovieStart = android.os.SystemClock.uptimeMillis() - mCurrentAnimationTime;
}
invalidate();
}

/**
* 判断gif图是否停止了
* @return
*/
public boolean isPaused() {
return this.mPaused;
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if (mMovie != null) {
int movieWidth = mMovie.width();
int movieHeight = mMovie.height();
int maximumWidth = MeasureSpec.getSize(widthMeasureSpec);
float scaleW = (float) movieWidth / (float) maximumWidth;
mScale = 1f / scaleW;
mMeasuredMovieWidth = maximumWidth;
mMeasuredMovieHeight = (int) (movieHeight * mScale);
setMeasuredDimension(mMeasuredMovieWidth, mMeasuredMovieHeight);
} else {
setMeasuredDimension(getSuggestedMinimumWidth(),getSuggestedMinimumHeight());
}
}

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
mLeft = (getWidth() - mMeasuredMovieWidth) / 2f;
mTop = (getHeight() - mMeasuredMovieHeight) / 2f;
mVisible = getVisibility() == View.VISIBLE;
}

@Override
protected void onDraw(Canvas canvas) {
if (mMovie != null) {
if (!mPaused){
if(updateAnimationTime()){
drawMovieFrame(canvas);
invalidateView();
}else{
if(null!=gifPlayListener){
gifPlayListener.playFinish();
}
}
} else {
drawMovieFrame(canvas);
}
}
}

@SuppressLint("NewApi")
private void invalidateView() {
if (mVisible) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
postInvalidateOnAnimation();
} else {
invalidate();
}
}
}

private boolean updateAnimationTime() {
long  now = android.os.SystemClock.uptimeMillis();

if (mMovieStart == 0) {// 如果第一帧，记录起始时间
mMovieStart = now;
}else if((now-mMovieStart)>=duration){//动画需要结束
return false;
}
// 算出需要显示第几帧
mCurrentAnimationTime = (int) ((now - mMovieStart) % duration);
return true;
}

private void drawMovieFrame(Canvas canvas) {
mMovie.setTime(mCurrentAnimationTime);// 设置要显示的帧，绘制即可
canvas.save(Canvas.MATRIX_SAVE_FLAG);
canvas.scale(mScale, mScale);
mMovie.draw(canvas, mLeft / mScale, mTop / mScale);
canvas.restore();
}

@SuppressLint("NewApi")
@Override
public void onScreenStateChanged(int screenState) {
super.onScreenStateChanged(screenState);
mVisible = screenState == SCREEN_STATE_ON;
invalidateView();
}

@SuppressLint("NewApi")
@Override
protected void onVisibilityChanged(View changedView, int visibility) {
super.onVisibilityChanged(changedView, visibility);
mVisible = visibility == View.VISIBLE;
invalidateView();
}

@Override
protected void onWindowVisibilityChanged(int visibility) {
super.onWindowVisibilityChanged(visibility);
mVisible = visibility == View.VISIBLE;
invalidateView();
}

public void setOnGifPlayListener(GifPlayListener gifPlayListener) {
this.gifPlayListener = gifPlayListener;
}

public interface GifPlayListener{
void playFinish();
}

}

public class Flake {
float x, y;
float rotation;
float speed;
float rotationSpeed;
int width,height;
Bitmap bitmap;

static HashMap<Integer, Bitmap> bitmapMap = new HashMap<Integer, Bitmap>();

static Flake createFlake(float xRange, Bitmap originalBitmap,Context Context) {
Flake flake = new Flake();
DisplayMetrics metrics = getDisplayMetrics(Context);
if (metrics.widthPixels >= 1080) {
flake.width = (int) (5 + (float) Math.random() * 80);
float hwRatio = originalBitmap.getHeight() / originalBitmap.getWidth();
flake.height = (int) (flake.width * hwRatio + 60);
} else {
flake.width = (int) (5 + (float) Math.random() * 50);
float hwRatio = originalBitmap.getHeight() / originalBitmap.getWidth();
flake.height = (int) (flake.width * hwRatio + 40);

}
flake.x = (float) Math.random() * (xRange - flake.width);
flake.y = 0 - (flake.height + (float) Math.random() * flake.height);
flake.speed = 50 + (float) Math.random() * 150;
flake.rotation = (float) Math.random() * 180 - 90;
flake.rotationSpeed = (float) Math.random() * 90 - 45;
flake.bitmap = bitmapMap.get(flake.width);
if (flake.bitmap == null) {
flake.bitmap = Bitmap.createScaledBitmap(originalBitmap,(int) flake.width, (int) flake.height, true);
bitmapMap.put(flake.width,flake.bitmap);
}
return flake;
}

/**
* 获取屏幕尺寸与密度.
* @param context the context
* @return mDisplayMetrics
*/
public static DisplayMetrics getDisplayMetrics(Context context) {
Resources mResources;
if (context == null) {
mResources = Resources.getSystem();

} else {
mResources = context.getResources();
}
//DisplayMetrics{density=1.5, width=480, height=854, scaledDensity=1.5, xdpi=160.421, ydpi=159.497}
//DisplayMetrics{density=2.0, width=720, height=1280, scaledDensity=2.0, xdpi=160.42105, ydpi=160.15764}
DisplayMetrics mDisplayMetrics = mResources.getDisplayMetrics();
return mDisplayMetrics;
}
}

public class FlakeView extends View {
Bitmap droid;       // The bitmap that all flakes use
int numFlakes = 0;  // Current number of flakes
ArrayList<Flake> flakes = new ArrayList<Flake>(); // List of current flakes
public ValueAnimator animator = ValueAnimator.ofFloat(0, 1);
long startTime, prevTime; // Used to track elapsed time for animations and fps
int frames = 0;     // Used to track frames per second
Paint textPaint;    // Used for rendering fps text
float fps = 0;      // frames per second
Matrix m = new Matrix(); // Matrix used to translate/rotate each flake during rendering
String fpsString = "";
String numFlakesString = "";
/**
* Constructor. Create objects used throughout the life of the View: the Paint and
* the animator
*/
public FlakeView(Context context) {
super(context);
droid = BitmapFactory.decodeResource(getResources(), R.drawable.icon_coin);
textPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
textPaint.setColor(Color.WHITE);
textPaint.setTextSize(24);

animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator arg0) {
long nowTime = System.currentTimeMillis();
float secs = (float) (nowTime - prevTime) / 100f;
prevTime = nowTime;
for (int i = 0; i < numFlakes; ++i) {
Flake flake = flakes.get(i);
flake.y += (flake.speed * secs);
if (flake.y > getHeight()) {
flake.y = 0 - flake.height;
}
flake.rotation = flake.rotation + (flake.rotationSpeed * secs);
}
invalidate();
}
});
animator.setRepeatCount(ValueAnimator.INFINITE);
animator.setDuration(3000);
}

int getNumFlakes() {
return numFlakes;
}

private void setNumFlakes(int quantity) {
numFlakes = quantity;
numFlakesString = "numFlakes: " + numFlakes;
}

/**
* Add the specified number of droidflakes.
*/
public void addFlakes(int quantity) {
for (int i = 0; i < quantity; ++i) {
flakes.add(Flake.createFlake(getWidth(),droid,getContext()));
}
setNumFlakes(numFlakes + quantity);
}

void subtractFlakes(int quantity) {
for (int i = 0; i < quantity; ++i) {
int index = numFlakes - i - 1;
flakes.remove(index);
}
setNumFlakes(numFlakes - quantity);
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
// Reset list of droidflakes, then restart it with 8 flakes
flakes.clear();
numFlakes = 0;
addFlakes(16);
// Cancel animator in case it was already running
animator.cancel();
// Set up fps tracking and start the animation
startTime = System.currentTimeMillis();
prevTime = startTime;
frames = 0;
animator.start();
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
for (int i = 0; i < numFlakes; ++i) {
Flake flake = flakes.get(i);
m.setTranslate(-flake.width / 2, -flake.height / 2);
m.postRotate(flake.rotation);
m.postTranslate(flake.width / 2 + flake.x, flake.height / 2 + flake.y);
canvas.drawBitmap(flake.bitmap, m, null);
}
// fps counter: count how many frames we draw and once a second calculate the
// frames per second
++frames;
long nowTime = System.currentTimeMillis();
long deltaTime = nowTime - startTime;
if (deltaTime > 1000) {
float secs = (float) deltaTime / 1000f;
fps = (float) frames / secs;
//            fpsString = "fps: " + fps;
startTime = nowTime;
frames = 0;
}
}

public void pause() {
animator.cancel();
}

public void resume() {
animator.start();
}

}

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">

<com.xx.gifdemo.GifView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:enabled="false"
android:hardwareAccelerated="false" />

<Button
android:id="@+id/button_stop1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="停止/继续"/>
</RelativeLayout>

<LinearLayout
android:id="@+id/container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"/>

</FrameLayout>