Android 多个动画打开按钮，仅显示最后一个

我有一个动画，我想在3个不同的按钮上实现，但由于某种原因，当我按下它们时，只有最后按下的按钮启动动画，其他两个按钮上的动画停止工作。我在stackoverflow上看到了一个答案，但我不明白。我还注意到，如果我复制动画代码两次，并将其命名为animation2和animation3，然后将其添加到按钮中，那么它就会工作，但我假设这是非常内存不足的。这是我的密码：

    public class MainActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final Button a1 = (Button) findViewById(R.id.a1);
    final Button a2 = (Button) findViewById(R.id.a2);
    final Button a3 = (Button) findViewById(R.id.a3);


    final AnimationDrawable animation = new AnimationDrawable();
    animation.addFrame(getResources().getDrawable(R.drawable.a2), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a3), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a4), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a5), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a6), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a7), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a8), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a9), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a10), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a11), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a12), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a13), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a14), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a15), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a16), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a17), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a18), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a19), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a20), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a21), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a22), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a23), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a24), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a25), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a26), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a27), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a28), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a29), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a30), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a31), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a32), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a33), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a34), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a35), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a36), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a37), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a38), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a39), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a40), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a41), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a42), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a43), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a44), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a45), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a46), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a47), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a48), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a49), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a50), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a51), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a52), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a53), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a54), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a55), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a56), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a57), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a58), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a59), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a60), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a61), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a62), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a63), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a64), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a65), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a66), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a67), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a68), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a69), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a70), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a71), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a72), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a73), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a74), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a75), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a76), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a77), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a78), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a79), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a80), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a81), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a82), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a83), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a84), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a85), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a86), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a87), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a88), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a89), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a90), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a91), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a92), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a93), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a94), 20);
    animation.addFrame(getResources().getDrawable(R.drawable.a95), 20);

    animation.setOneShot(false);




    a1.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:

                    a1.setBackgroundDrawable(animation);

                    animation.start();



                    break;

                case MotionEvent.ACTION_UP:


                    animation.stop();

                    //a1.setBackgroundResource(R.drawable.index1);




                    // End
                    break;
            }

            return false;
        }
    });
    a2.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:

                    a2.setBackgroundDrawable(animation);

                    animation.start();



                    break;

                case MotionEvent.ACTION_UP:


                    animation.stop();

                    //a1.setBackgroundResource(R.drawable.index1);




                    // End
                    break;
            }

            return false;
        }
    });
    a3.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:

                    a3.setBackgroundDrawable(animation);

                    animation.start();



                    break;

                case MotionEvent.ACTION_UP:


                    animation.stop();

                    //a1.setBackgroundResource(R.drawable.index1);




                    // End
                    break;
            }

            return false;
        }
    });



}

---

我终于明白了！以下是需要放入可绘制文件夹代码中的xml代码：

    <?xml version="1.0" encoding="utf-8"?>


<animation-list   android:id="@+id/custom_button" android:oneshot="false"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/a1" android:duration="20" />
    <item android:drawable="@drawable/a2" android:duration="20" />
    <item android:drawable="@drawable/a3" android:duration="20" />
<item android:drawable="@drawable/a4" android:duration="20" />
<item android:drawable="@drawable/a5" android:duration="20" />
<item android:drawable="@drawable/a6" android:duration="20" />
<item android:drawable="@drawable/a7" android:duration="20" />
<item android:drawable="@drawable/a8" android:duration="20" />
<item android:drawable="@drawable/a9" android:duration="20" />
<item android:drawable="@drawable/a10" android:duration="20" />
</animation-list>

---

}

为每个按钮定义三个AnimationDrawable对象。是的，三个AnimationDrawable将是一种方式。是的，我发现我可以这样做，但这不是很低效吗？如果我没有3个而是30个按钮，它会不会大大降低手机的速度？难道没有更好的方法吗？为什么不在res/drawable/目录中将动画定义为XML。这样，你就可以在单独的AnimationDrawables中重复使用这个定义。我真的不知道该怎么做

    public class MainActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final Button a1 = (Button) findViewById(R.id.a1);
    final Button a2 = (Button) findViewById(R.id.a2);
    final Button a3 = (Button) findViewById(R.id.a3);




    a1.setBackgroundResource(R.drawable.custom_button);
    a2.setBackgroundResource(R.drawable.custom_button);
    a3.setBackgroundResource(R.drawable.custom_button);


    final AnimationDrawable anim = (AnimationDrawable) a1.getBackground();
    final AnimationDrawable anim2 = (AnimationDrawable) a2.getBackground();
    final AnimationDrawable anim3 = (AnimationDrawable) a3.getBackground();







    a1.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:



                    anim.start();



                    break;

                case MotionEvent.ACTION_UP:


                    anim.stop();





                    // End
                    break;
            }

            return false;
        }
    });
    a2.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:

                    anim2.start();



                    break;

                case MotionEvent.ACTION_UP:


                    anim2.stop();



                    // End
                    break;
            }

            return false;
        }
    });
    a3.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:

                    anim3.start();

                    break;

                case MotionEvent.ACTION_UP:


                    anim3.stop();


                    // End
                    break;
            }

            return false;
        }
    });



}