Android播放gif动画,增加屏幕掉金币效果

前言:播放gif的版本有很多,我这边使用Android自带的Movie类播放gif动画,也是在别人的基础上进行修改.有同样需求的朋友可以参考我的demo.

1.效果图如下:

2.部分主要代码

MainActivity.java  给封装的GifView设置背景gif图片资源, 绘制金币,同时开启金币屏幕掉下来的效果,监听gif播放完毕动画,结束掉金币的动画

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;
		}
	}
}

GifView.java 播放gif动画的自定义View

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();
	}

}

Flake.java  金币的实体类

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;
    }
}

FlakeView.java   绘制金币的View  金币屏幕掉下的动画

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();
    }

}

activity_main.xml  布局文件

<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>

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