本文实例为大家分享Android通过Movie展示Gif格式图片的相关代码，供大家参考，具体内容如下
public class CommonGifView extends View { private Resources mResources; private Movie mMovie; private long startTime = 0; private float widthRatio; private float heightRatio; public CommonGifView(Context context) { this(context, null); } public CommonGifView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public CommonGifView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); mResources = context.getResources(); TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.custom_gif_view); int src_id = ta.getResourceId(R.styleable.custom_gif_view_gif_src, -1); setGifViewBg(src_id); ta.recycle(); } /** * 为View设置gif格式图片背景 * @description： * @author ldm * @date 2016-2-18 上午9:21:16 */ private void setGifViewBg(int src_id) { if (src_id == -1) { return; } // 获取对应资源文件的输入流 InputStream is = mResources.openRawResource(src_id); mMovie = Movie.decodeStream(is);// 解码输入流为Movie对象 requestLayout(); } /* * 这个方法供Activity中使用 */ public void setGifStream(InputStream is) { mMovie = Movie.decodeStream(is); requestLayout(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); long now = SystemClock.uptimeMillis(); if (startTime == 0) { // 如果第一帧，记录起始时间 startTime = now; } if (mMovie != null) {// 如果返回值不等于null，就说明这是一个GIF图片 int duration = mMovie.duration();// 取出动画的时长 if (duration == 0) { duration = 1000; } int currentTime = (int) ((now - startTime) % duration);// 算出需要显示第几帧 mMovie.setTime(currentTime); // mMovie.draw(canvas, getWidth() - mMovie.width(), getHeight() - mMovie.height()); float scale = Math.min(widthRatio, heightRatio); canvas.scale(scale, scale); mMovie.draw(canvas, 0, 0); invalidate(); } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { if (mMovie != null) {// 如果返回值不等于null，就说明这是一个GIF图片 int w = mMovie.width();//宽度 int h = mMovie.height();//高度 if (w <= 0) { w = 1; } if (h <= 0) { h = 1; } int left = getPaddingLeft(); int right = getPaddingRight(); int top = getPaddingTop(); int bottom = getPaddingBottom(); int widthSize, heightSize; w += left + right; h += top + bottom; w = Math.max(w, getSuggestedMinimumWidth()); h = Math.max(h, getSuggestedMinimumHeight()); widthSize = resolveSizeAndState(w, widthMeasureSpec, 0);//根据你提供的大小和MeasureSpec，返回你想要的大小值 heightSize = resolveSizeAndState(h, heightMeasureSpec, 0); widthRatio = (float) widthSize / w; heightRatio = (float) heightSize / h; setMeasuredDimension(widthSize, heightSize); } else { super.onMeasure(widthMeasureSpec, heightMeasureSpec); } } }
自定义属性res/values/attrs.xml文件：
<"1.0" encoding="utf-8"?> <resources> <declare-styleable name="custom_gif_view"> <attr name="gif_src" format="reference"></attr> </declare-styleable> </resources>
在Activity中使用：
public class MainActivity extends Activity { private CommonGifView view; private InputStream is; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); view = (CommonGifView) findViewById(R.id.gif_test); try { is = getAssets().open("test01.gif"); view.setGifStream(is); } catch (IOException e) { e.printStackTrace(); } } }
以上就是本文的全部内容，希望对大家的学习有所帮助。
【Android通过Movie展示Gif格式图片】相关文章：
★ android PopupWindow 和 Activity弹出窗口实现方式
★ Android 通过onDraw实现在View中绘图操作的示例