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