package com.weikou.beibeivideo.widget;
|
|
import android.annotation.SuppressLint;
|
import android.content.Context;
|
import android.content.res.TypedArray;
|
import android.graphics.Canvas;
|
import android.graphics.Movie;
|
import android.os.Build;
|
import android.util.AttributeSet;
|
import android.view.View;
|
|
import com.weikou.beibeivideo.R;
|
|
/**
|
* This is a View class that wraps Android {@link Movie} object and displays it.
|
* You can set GIF as a Movie object or as a resource id from XML or by calling
|
* {@link #setMovie(Movie)} or {@link #setMovieResource(int)}.
|
* <p>
|
* You can pause and resume GIF animation by calling {@link #setPaused(boolean)}.
|
* <p>
|
* The animation is drawn in the center inside of the measured view bounds.
|
*
|
* @author Sergey Bakhtiarov
|
*/
|
|
public class GifMovieView extends View {
|
|
private static final int DEFAULT_MOVIEW_DURATION = 1000;
|
|
private int mMovieResourceId;
|
private Movie mMovie;
|
|
private long mMovieStart;
|
private int mCurrentAnimationTime = 0;
|
|
/**
|
* Position for drawing animation frames in the center of the view.
|
*/
|
private float mLeft;
|
private float mTop;
|
|
/**
|
* Scaling factor to fit the animation within view bounds.
|
*/
|
private float mScale;
|
|
/**
|
* Scaled movie frames width and height.
|
*/
|
private int mMeasuredMovieWidth;
|
private int mMeasuredMovieHeight;
|
|
private volatile boolean mPaused = false;
|
private boolean mVisible = true;
|
|
public GifMovieView(Context context) {
|
this(context, null);
|
}
|
|
public GifMovieView(Context context, AttributeSet attrs) {
|
this(context, attrs, R.styleable.CustomTheme_gifMoviewViewStyle);
|
}
|
|
public GifMovieView(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) {
|
|
/**
|
* Starting from HONEYCOMB have to turn off HW acceleration to draw
|
* Movie on Canvas.
|
*/
|
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
|
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
|
}
|
|
final TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.GifMoviewView, defStyle,
|
R.style.Widget_GifMoviewView);
|
|
mMovieResourceId = array.getResourceId(R.styleable.GifMoviewView_gif, -1);
|
mPaused = array.getBoolean(R.styleable.GifMoviewView_paused, false);
|
|
array.recycle();
|
|
if (mMovieResourceId != -1) {
|
mMovie = Movie.decodeStream(getResources().openRawResource(mMovieResourceId));
|
}
|
}
|
|
public void setMovieResource(int movieResId) {
|
this.mMovieResourceId = movieResId;
|
mMovie = Movie.decodeStream(getResources().openRawResource(mMovieResourceId));
|
requestLayout();
|
}
|
|
public void setMovie(Movie movie) {
|
this.mMovie = movie;
|
requestLayout();
|
}
|
|
public Movie getMovie() {
|
return mMovie;
|
}
|
|
public void setMovieTime(int time) {
|
mCurrentAnimationTime = time;
|
invalidate();
|
}
|
|
public void setPaused(boolean paused) {
|
this.mPaused = paused;
|
|
/**
|
* Calculate new movie start time, so that it resumes from the same
|
* frame.
|
*/
|
if (!paused) {
|
mMovieStart = android.os.SystemClock.uptimeMillis() - mCurrentAnimationTime;
|
}
|
|
invalidate();
|
}
|
|
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();
|
|
/*
|
* Calculate horizontal scaling
|
*/
|
float scaleH = 1f;
|
int measureModeWidth = MeasureSpec.getMode(widthMeasureSpec);
|
|
if (measureModeWidth != MeasureSpec.UNSPECIFIED) {
|
int maximumWidth = MeasureSpec.getSize(widthMeasureSpec);
|
// if (movieWidth > maximumWidth) {
|
scaleH = (float) movieWidth / (float) maximumWidth;
|
// }
|
}
|
|
/*
|
* calculate vertical scaling
|
*/
|
float scaleW = 1f;
|
int measureModeHeight = MeasureSpec.getMode(heightMeasureSpec);
|
|
if (measureModeHeight != MeasureSpec.UNSPECIFIED) {
|
int maximumHeight = MeasureSpec.getSize(heightMeasureSpec);
|
// if (movieHeight > maximumHeight) {
|
scaleW = (float) movieHeight / (float) maximumHeight;
|
// }
|
}
|
|
/*
|
* calculate overall scale
|
*/
|
mScale = 1f / Math.max(scaleH, scaleW);
|
|
mMeasuredMovieWidth = (int) (movieWidth * mScale);
|
mMeasuredMovieHeight = (int) (movieHeight * mScale);
|
|
setMeasuredDimension(mMeasuredMovieWidth, mMeasuredMovieHeight);
|
|
} else {
|
/*
|
* No movie set, just set minimum available size.
|
*/
|
setMeasuredDimension(getSuggestedMinimumWidth(), getSuggestedMinimumHeight());
|
}
|
}
|
|
@Override
|
protected void onLayout(boolean changed, int l, int t, int r, int b) {
|
super.onLayout(changed, l, t, r, b);
|
|
/*
|
* Calculate left / top for drawing in center
|
*/
|
mLeft = (getWidth() - mMeasuredMovieWidth) / 2f;
|
mTop = (getHeight() - mMeasuredMovieHeight) / 2f;
|
|
mVisible = getVisibility() == View.VISIBLE;
|
}
|
|
@Override
|
protected void onDraw(Canvas canvas) {
|
if (mMovie != null) {
|
if (!mPaused) {
|
updateAnimationTime();
|
drawMovieFrame(canvas);
|
invalidateView();
|
} else {
|
drawMovieFrame(canvas);
|
}
|
}
|
}
|
|
/**
|
* Invalidates view only if it is visible.
|
* <br>
|
* {@link #postInvalidateOnAnimation()} is used for Jelly Bean and higher.
|
*
|
*/
|
@SuppressLint("NewApi")
|
private void invalidateView() {
|
if(mVisible) {
|
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
|
postInvalidateOnAnimation();
|
} else {
|
invalidate();
|
}
|
}
|
}
|
|
/**
|
* Calculate current animation time
|
*/
|
private void updateAnimationTime() {
|
long now = android.os.SystemClock.uptimeMillis();
|
|
if (mMovieStart == 0) {
|
mMovieStart = now;
|
}
|
|
int dur = mMovie.duration();
|
|
if (dur == 0) {
|
dur = DEFAULT_MOVIEW_DURATION;
|
}
|
|
mCurrentAnimationTime = (int) ((now - mMovieStart) % dur);
|
}
|
|
/**
|
* Draw current GIF frame
|
*/
|
private void drawMovieFrame(Canvas canvas) {
|
|
mMovie.setTime(mCurrentAnimationTime);
|
|
canvas.save();
|
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();
|
}
|
}
|
