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();}@Overrideprotected 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();}}@Overrideprotected 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:
<?xml version="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;@Overrideprotected 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。