android 图片进度条

png图片

代码

ImageView loading=getActivity().findViewById(R.id.pro_loading);                LinearInterpolator lin = new LinearInterpolator();        am = new RotateAnimation ( 0, +360,        Animation.RELATIVE_TO_SELF, 0.5f,        Animation.RELATIVE_TO_SELF, 0.5f );         am. setDuration ( 1000 );//旋转一个周期的时长        am. setRepeatCount ( -1 );// 动画重复次数(-1 表示一直重复)        am.setRepeatCount(Animation.INFINITE);        am.setInterpolator(lin);         loading.setAnimation(am);        am.startNow();

因为有好多fragment要用到，所以封装了一下

终极类：

public class ProgressImageView extends ImageView {    private Animation am;    public ProgressImageView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        init();    }        public ProgressImageView(Context context, AttributeSet attrs) {        super(context, attrs);        // TODO Auto-generated constructor stub        init();    }        public ProgressImageView(Context context) {        super(context);        // TODO Auto-generated constructor stub        init();    }        public void init(){        LinearInterpolator lin = new LinearInterpolator();        am = new RotateAnimation ( 0, +360,        Animation.RELATIVE_TO_SELF, 0.5f,        Animation.RELATIVE_TO_SELF, 0.5f );         am. setDuration ( 1000 );//旋转一个周期的时长        am. setRepeatCount ( -1 );// 动画重复次数(-1 表示一直重复)        am.setRepeatCount(Animation.INFINITE);        am.setInterpolator(lin);     }        /**     * 显示     */    public void show(){        setVisibility(View.VISIBLE);        this.setAnimation(am);        am.startNow();    }        /**     *隐藏      */    public void hide(){        this.clearAnimation();        setVisibility(View.INVISIBLE);    }}

        <com.lz.swc.view.ProgressImageView             android:id="@+id/pro_loading"            android:layout_width="wrap_content"              android:layout_height="wrap_content"              android:src="@drawable/loading"            android:layout_centerInParent="true"            android:contentDescription="@string/tabspic"            android:visibility="invisible"            />

在xml中引用就可以了。调用 show hide方法即可

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