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Android中帧动画在Activity启动时自动运行的几种方式_android startactivityforresult启动activity动画

android startactivityforresult启动activity动画

第一种方式启动帧动画:(在Activity启动时会自动运行动画)

AnimationDrawable ad

ImageView iv = (ImageView) findViewById(R.id.animation_view);

iv.setBackgroundResource(R.drawable.animation);

ad = (AnimationDrawable) iv.getBackground();

iv.getViewTreeObserver().addOnPreDrawListener(opdl);

//当一个视图树将要绘制时产生事件,可以添加一个其事件处理函数

 

OnPreDrawListener opdl=new OnPreDrawListener(){

      @Override

      publicboolean onPreDraw() {

         ad.start();

         returntrue; //注意此行返回的值

      }

   };

第二种方式启动动画:(在Activity启动时会自动运行动画)

ImageView image = (ImageView) findViewById(R.id.animation_view);

image.setBackgroundResource(R.anim.oldsheep_wait);

        animationDrawable = (AnimationDrawable) image.getBackground();

        RunAnim runAnim=new RunAnim();

        runAnim.execute("");

 

class RunAnim extends AsyncTask<String, String, String>

{

        @Override

        protected String doInBackground(String... params)

        {

            if (!animationDrawable.isRunning())

            {

                animationDrawable.stop();

                animationDrawable.start();

            }

            return"";

        }

}

 

第三种方式启动动画:(在Activity启动时会自动运行动画)

ImageView image = (ImageView) findViewById(R.id.animation_view);

image.setBackgroundResource(R.anim.oldsheep_wait);

        animationDrawable = (AnimationDrawable) image.getBackground();

image.post(new Runnable()

 {

            @Override

            publicvoid run()

            {

                animationDrawable.start();

            }

        });

 

第四种方式启动动画:(在Activity启动时会自动运行动画)

ImageView image = (ImageView) findViewById(R.id.animation_view);

image.setBackgroundResource(R.anim.oldsheep_wait);

        animationDrawable = (AnimationDrawable) image.getBackground();

 

@Override

    publicvoid onWindowFocusChanged(boolean hasFocus)

    {

        animationDrawable.start();

        super.onWindowFocusChanged(hasFocus);

    }

这个ad.start不能直接写在onClickonStartonResume里面,是无效的,无法启动动画,只能写在比如事件监听当中

 

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