android实现简单的活动转盘
本文实例为大家分享了android实现简单活动转盘的具体代码,供大家参考,具体内容如下
页面
public class CircleTurntableActivity extends AppCompatActivity { private Animation mStartAnimation; private ImageView mLuckyTurntable; private boolean isRunning; private boolean mIsLucky = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_circle_turntable); mLuckyTurntable = (ImageView) findViewById(R.id.id_lucky_turntable); ImageView mStartBtn = (ImageView) findViewById(R.id.id_start_btn); mStartBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (!isRunning) { isRunning = true; mIsLucky = !mIsLucky; startAnimation(); } } }); } /** * 开启动画 * 5秒旋转5圈+中奖所在位置角度 */ private void startAnimation() { float toDegree;//结束角度(以实际转盘图为准计算角度) if (mIsLucky) { toDegree = 360 * 5 + 30f; } else { toDegree = 360 * 5 + 90f; } if (mStartAnimation != null) { mStartAnimation.reset(); } // 按中心点旋转 toDegree度 // 参数:旋转的开始角度、旋转的结束角度、X轴的伸缩模式、X坐标的伸缩值、Y轴的伸缩模式、Y坐标的伸缩值 mStartAnimation = new RotateAnimation(0, toDegree, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); mStartAnimation.setDuration(5000); // 设置旋转时间 mStartAnimation.setRepeatCount(0); // 设置重复次数 mStartAnimation.setFillAfter(true);// 动画执行完后是否停留在执行完的状态 mStartAnimation.setInterpolator(new AccelerateDecelerateInterpolator()); // 动画播放的速度 mStartAnimation.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { } @Override public void onAnimationEnd(Animation animation) { isRunning = false; Toast.makeText(CircleTurntableActivity.this, mIsLucky ? "精美礼品" : "谢谢参与", Toast.LENGTH_SHORT).show(); } @Override public void onAnimationRepeat(Animation animation) { } }); mLuckyTurntable.startAnimation(mStartAnimation); } }
页面布局
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <!--转盘--> <ImageView android:id="@+id/id_lucky_turntable" android:layout_width="613.33px" android:layout_height="613.33px" android:layout_centerInParent="true" android:src="@mipmap/lucky_turntable_bg" /> <!--指针--> <ImageView android:paddingBottom="40px" android:id="@+id/id_start_btn" android:layout_width="266.66px" android:layout_height="266.66px" android:layout_centerInParent="true" android:src="@mipmap/lucky_start_icon" /> </RelativeLayout>
效果:
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