Android GIF 渲染问题

Question

在我的 activity_main.xml 文件中，我有以下代码块，因为我想用它来制作我的 GIF 文件的动画。

<matthewallenlinsoftware.keepy_uppy.PlayGifView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/viewGif"
    android:layout_gravity="center"
    android:layout_weight="0.04"
    android:src="@drawable/bouncing_ball" />

GIF 的动画效果很好，但这会导致 Android Studio 中出现渲染问题。有解决办法吗？

PlayGifView 的代码如下:

public class PlayGifView extends View {

private static final int DEFAULT_MOVIEW_DURATION = 1000;

private int mMovieResourceId;
private Movie mMovie;

private long mMovieStart = 0;
private int mCurrentAnimationTime = 0;

@SuppressLint("NewApi")
public PlayGifView(Context context, AttributeSet attrs) {
    super(context, attrs);

    /**
     * Starting from HONEYCOMB have to turn off HardWare acceleration to draw
     * Movie on Canvas.
     */
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        setLayerType(View.LAYER_TYPE_SOFTWARE, null);
    }
}

public void setImageResource(int mvId){
    this.mMovieResourceId = mvId;
    mMovie = Movie.decodeStream(getResources().openRawResource(mMovieResourceId));
    requestLayout();
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    if(mMovie != null){
        setMeasuredDimension(mMovie.width(), mMovie.height());
    }else{
        setMeasuredDimension(getSuggestedMinimumWidth(), getSuggestedMinimumHeight());
    }
}

@Override
protected void onDraw(Canvas canvas) {
    if (mMovie != null){
        updateAnimtionTime();
        drawGif(canvas);
        invalidate();
    }else{
        drawGif(canvas);    //NULLPTR EXCEPTION
    }
}

private void updateAnimtionTime() {
    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);
}

private void drawGif(Canvas canvas) {
    mMovie.setTime(mCurrentAnimationTime);  //NULLPTR EXCEPTION
    mMovie.draw(canvas, 0, 0);
    canvas.restore();
}

}

Answer 1

如果您将 GIF 保存在 hdpi、xhdpi 等文件夹中。也可以直接将 GIF 复制到“drawable”中或尝试以管理员身份运行 android studio...