view上下抖动特效

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

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="1000"
    android:fromXDelta="0"
    android:interpolator="@anim/cycle_8"
    android:toXDelta="10" />

cycle_8.xml

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

<cycleInterpolator xmlns:android="http://schemas.android.com/apk/res/android"
    android:cycles="8" />

public void login(View v) {
        //得到输入框的文本
        String name = et_main_name.getText().toString();
        //判断是否是空串, 如果为空串, 显示抖动动画
        if("".equals(name.trim())) {
            Animation animation = AnimationUtils.loadAnimation(this, R.anim.shake);
            et_main_name.startAnimation(animation);
        } else {
            //否则, 提示登陆
            Toast.makeText(this, "去登陆", 0).show();
        }

    }