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();
}
}
});
}
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：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
