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(); } |
