Android中加载Gif动画

源码 · 2024-9-30 13:39:07

Gif动画，我使用了三种方式

1.自界说控件加载gif动画

①.起首自界说一个GifView，用于体现Gif图片，具体代码如下:
public class GifView extends View { private Resources resources; private Movie mMovie; private long mMovieStart; private float ratioWidth; private float ratioHeight; public GifView(Context context) {       this(context,null); }    public GifView(Context context, @Nullable AttributeSet attrs) {       this(context, attrs,0); }    public GifView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {       super(context, attrs, defStyleAttr);       if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {          setLayerType(View.LAYER_TYPE_SOFTWARE, null);       }       resources = context.getResources();       TypedArray ta = context.obtainStyledAttributes(attrs,R.styleable.GifView);       int resourceId = ta.getResourceId(R.styleable.GifView_src, -1);       setGifResource(resourceId);       ta.recycle(); }    public void setGifResource(int resourceId) {       if (resourceId==-1){          return;       }       InputStream is = resources.openRawResource(resourceId);       mMovie = Movie.decodeStream(is);       requestLayout(); } public  void setGifStream(InputStream is){       mMovie = Movie.decodeStream(is);       requestLayout(); }    @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {       super.onMeasure(widthMeasureSpec, heightMeasureSpec);       if (mMovie!=null){          int w = mMovie.width();          int h = mMovie.height();          if (w<=0){             w=1;          }          if (h<=0){             h=1;          }          int pLeft = getPaddingLeft();          int pRight = getPaddingRight();          int pTop = getPaddingTop();          int pBottom = getPaddingBottom();          int widthSize;          int heightSize;          w+=pLeft+pRight;          h+=pTop+pBottom;          w=Math.max(w,getSuggestedMinimumWidth());          h=Math.max(h,getSuggestedMinimumHeight());          widthSize= resolveSizeAndState(w,widthMeasureSpec,0);          heightSize= resolveSizeAndState(h,heightMeasureSpec,0);          ratioWidth = (float) widthSize/w;          ratioHeight = (float) heightSize/h;          setMeasuredDimension(widthSize,heightSize);       }else{          super.onMeasure(widthMeasureSpec, heightMeasureSpec);       } }    @Override protected void onDraw(Canvas canvas) {       super.onDraw(canvas);       long now = SystemClock.uptimeMillis();       if (mMovieStart ==0){ //第一次进入          mMovieStart =now;       }       if (mMovie!=null){          int dur = mMovie.duration();          if (dur==0){             dur=1000;          }          int relTime= (int) ((now-mMovieStart)%dur);          mMovie.setTime(relTime);          //  mMovie.draw(canvas,0,0);          float scale=Math.min(ratioWidth,ratioHeight);          canvas.scale(scale,scale);          mMovie.draw(canvas,0,0);          invalidate();       } }}②.在结构文件中添加自界说的控件，我这加了两个，第一个展示assets文件中的gif图片，一个展示drawable中的gif图片
<com.example.wen.adroid.view.GifView       android:id="@+id/gv_photo"       android:layout_width="match_parent"       android:layout_weight="1"       android:layout_gravity="center"       android:layout_height="0dp"    /> <com.example.wen.adroid.view.GifView       android:id="@+id/gv_local_photo"       android:layout_width="match_parent"       android:layout_weight="1"       android:layout_gravity="center"       android:layout_height="0dp"       app:src="@drawable/gifphoto"/>③.展示gif图片，具体代码如下:
      //方法一使用自界说gifview播放gif图片       mGvLocalPhoto = (GifView) findViewById(R.id.gv_local_photo);       mGvPhoto = (GifView) findViewById(R.id.gv_photo);             try {          InputStream is = getAssets().open("assetphoto.gif");          mGvPhoto.setGifStream(is);       } catch (IOException e) {          e.printStackTrace();       }

2.使用Glide加载gif动画

Glide 所在： https://github.com/bumptech/glide
①.起首设置build.gradle
compile 'com.github.bumptech.glide:glide:3.7.0'②.设置好Glide之后，然后通过基本的用法去加载，加载代码如下:
// 使用Glide播放gif图片 mIvPhoto = (ImageView) findViewById(R.id.iv_photo); Glide.with(this) .load(R.drawable.gifphoto) .asGif() .diskCacheStrategy(DiskCacheStrategy.SOURCE) .into(mIvPhoto);注意:diskCacheStrategy是为其添加缓存计谋,此中缓存计谋可以为:Source及None,None及为不缓存,Source缓存原型。

3.使用android-gif-drawable加载gif动画

android-gif-drawable 所在：https://github.com/koral--/android-gif-drawable
①.起首设置build.gradle
compile 'pl.droidsonroids.gif:android-gif-drawable:1.2.7'②.在xml中添加GifImageView控件
<pl.droidsonroids.gif.GifImageView android:id="@+id/giv_photo" android:layout_width="match_parent" android:layout_weight="1" android:layout_height="0dp" android:src="@drawable/gifphoto" />③.调用android-gif-drawable
//使用android-gif-drawable 库 GifImageView mGifIvPhoto = (GifImageView) findViewById(R.id.giv_photo); try { //加载asset文件中的gif图片 GifDrawable gif = new GifDrawable(getAssets(), "assetphoto.gif"); mGifIvPhoto.setImageDrawable(gif); } catch (IOException e) { e.printStackTrace(); }

Android中加载Gif动画

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