MblSequenceImage.java

package com.datdo.mobilib.widget;

import com.datdo.mobilib.util.MblUtils;

import android.content.Context;
import android.os.Handler;
import android.os.Looper;
import android.util.AttributeSet;
import android.widget.ImageView;

public class MblSequenceImage extends ImageView {
    private int mCurrentIndex;
    private int[] mImageResIds;
    private long mInterval;
    private boolean mRepeat;
    private MblSequenceImageCallback mCallback;
    private static Handler sHandler = new Handler(Looper.getMainLooper());

    private Runnable mOnTimerTask = new Runnable() {
        @Override
        public void run() {
            MblUtils.executeOnMainThread(new Runnable() {
                @Override
                public void run() {
                    setImageResource(mImageResIds[mCurrentIndex]);
                    if (mCallback != null) mCallback.onShow(mCurrentIndex);

                    if (mCurrentIndex == mImageResIds.length-1) {
                        if (mRepeat) {
                            if (mCallback != null) mCallback.onReset();
                        } else {
                            if (mCallback != null) mCallback.onFinish();
                            stop();
                            return;
                        }
                    }
                    mCurrentIndex = (mCurrentIndex+1) % mImageResIds.length;

                    sHandler.removeCallbacks(mOnTimerTask);
                    sHandler.postDelayed(mOnTimerTask, mInterval);
                }
            });
        }
    };

    public MblSequenceImage(Context context) {
        super(context);
    }

    public MblSequenceImage(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MblSequenceImage(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public void init(int[] imageResIds, long interval, boolean repeat, MblSequenceImageCallback callback) {
        mImageResIds = imageResIds;
        mInterval = interval;
        mCurrentIndex = 0;
        mRepeat = repeat;
        mCallback = callback;
    }

    public void start() {
        stop();
        mCurrentIndex = 0;
        mOnTimerTask.run();
    }

    public void showImageAtIndex(int index) {
        setImageResource(mImageResIds[index]);
        mCurrentIndex = index;
    }

    public void stop() {
        sHandler.removeCallbacks(mOnTimerTask);
    }

    public static interface MblSequenceImageCallback {
        public void onFinish();
        public void onReset();
        public void onShow(int index);
    }
}