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自定义简单的逐帧动画控件


[摘要]本文主要是对自定义简单的逐帧动画控件的讲解,希望对大家学习自定义简单的逐帧动画控件有所帮助。
    今天我们来说一下关于自定义简单的逐帧动画控件的方法:
    package com.example.scr;
    import java.util.ArrayList;
    import java.util.Timer;
    import java.util.TimerTask;
    import android.content.Context;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.graphics.Canvas;
    import android.view.View;
    public class ArrowAnimationView extends View{
    Context mContext;
    private int scr_w = 0, scr_h = 0;
    private ArrayList<Bitmap> ani = new ArrayList<Bitmap>(5);
    private int g_anim_index = 0;
    private boolean isStart = true;
    private boolean isShow = true;
    private Timer timer = new Timer();
    public ArrowAnimationView(Context context) {
    super(context);
    mContext = context;
    int[] imgIds = {R.drawable.ani01, R.drawable.ani02, R.drawable.ani03,
    R.drawable.ani04, R.drawable.ani05 };
    for (int i = 0; i < imgIds.length; i++) {
    Bitmap bm = BitmapFactory.decodeResource(mContext.getResources(),
    imgIds[i]);
    ani.add(bm);
    }
    timer.scheduleAtFixedRate(new MyTask(), 100, 1000);
    }
    public ArrowAnimationView(Context context, int w, int h) {
    super(context);
    scr_w = w;
    scr_h = h;
    mContext = context;
    int[] imgIds = {R.drawable.ani01, R.drawable.ani02, R.drawable.ani03,
    R.drawable.ani04, R.drawable.ani05 };
    for (int i = 0; i < imgIds.length; i++) {
    Bitmap bm = BitmapFactory.decodeResource(mContext.getResources(),
    imgIds[i]);
    ani.add(bm);
    }
    timer.scheduleAtFixedRate(new MyTask(), 1, 200);
    }
    @Override
    public void layout(int l, int t, int r, int b) {
    // TODO Auto-generated method stub
    super.layout(l, t, r, b);
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    // TODO Auto-generated method stub
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
    public void drawArrowAnim(Canvas canvas)
    {
    int img_w = ani.get(0)。getWidth();
    int img_h = ani.get(0)。getHeight();
    int left = (scr_w / 2) - (img_w / 2);
    int top = scr_h - img_h - 120;
    canvas.drawBitmap(ani.get(g_anim_index), left, top, null);
    }
    private class MyTask extends TimerTask {
    @Override
    public void run() {
    if (isStart) {
    g_anim_index++;
    if (g_anim_index > ani.size()-1) {
    g_anim_index = 0;
    }
    }
    }
    }
    void startAnim()
    {
    isStart = true;
    }
    void stopAnim()
    {
    isStart = false;
    }
    void hideAnim()
    {
    isShow = true;
    }
    void showAnim()
    {
    isShow = false;
    }
    @Override
    protected void onDraw(Canvas canvas) {
    // TODO Auto-generated method stub
    super.onDraw(canvas);
    if (isShow)
    {
    drawArrowAnim(canvas);
    }
    invalidate();
    }
    public void onViewDestroy() {
    // TODO Auto-generated method stub
    if (timer != null) {
    timer.cancel();
    }
    }
    }



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