菜单项动画,无限旋转其自定义图标
Menu item animation, rotate indefinitely its custom icon
我有一个带有图标的菜单项(想象一下带有一个柳叶刀的时钟),我想让它的图标无限旋转。
我该如何处理这种效果?谢谢。
添加文件 res/layout/iv_refresh.xml
(将 ic_launcher 替换为您的自定义图标):
<?xml version="1.0" encoding="utf-8"?>
<ImageView
xmlns:android="http://schemas.android.com/apk/res/android"
style="@android:style/Widget.ActionButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="@string/app_name"
android:src="@drawable/ic_launcher" />
添加文件res/anim/rotate_refresh.xml
:
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="1000"
android:fromDegrees="0"
android:interpolator="@android:anim/linear_interpolator"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="360">
</rotate>
最后,在您的 java 代码中,您可以像这样启动动画:
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ImageView iv = (ImageView)inflater.inflate(R.layout.iv_refresh, null);
Animation rotation = AnimationUtils.loadAnimation(this, R.anim.rotate_refresh);
rotation.setRepeatCount(Animation.INFINITE);
iv.startAnimation(rotation);
menu.findItem(R.id.my_menu_item_id).setActionView(iv);
最好的方法在这里:
public class HomeActivity extends AppCompatActivity {
public static ActionMenuItemView btsync;
public static RotateAnimation rotateAnimation;
@Override
protected void onCreate(Bundle savedInstanceState) {
rotateAnimation = new RotateAnimation(360, 0, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
rotateAnimation.setDuration((long) 2*500);
rotateAnimation.setRepeatCount(Animation.INFINITE);
然后:
private void sync() {
btsync = this.findViewById(R.id.action_sync); //remember that u cant access this view at onCreate() or onStart() or onResume() or onPostResume() or onPostCreate() or onCreateOptionsMenu() or onPrepareOptionsMenu()
if (isSyncServiceRunning(HomeActivity.this)) {
showConfirmStopDialog();
} else {
if (btsync != null) {
btsync.startAnimation(rotateAnimation);
}
Context context = getApplicationContext();
context.startService(new Intent(context, SyncService.class));
}
}
记住 你不能在 onCreate() 或 onStart() 或 onResume() 或 onPostResume() 或 onPostCreate() 或 onCreateOptionsMenu() 或onPrepareOptionsMenu()
如果你想在 activity 开始后得到它,请把它放在延迟后:
public static void refreshSync(Activity context) {
Handler handler = new Handler(Looper.getMainLooper());
handler.postDelayed(new Runnable() {
public void run() {
btsync = context.findViewById(R.id.action_sync);
if (btsync != null && isSyncServiceRunning(context)) {
btsync.startAnimation(rotateAnimation);
} else if (btsync != null) {
btsync.clearAnimation();
}
}
}, 1000);
}
我有一个带有图标的菜单项(想象一下带有一个柳叶刀的时钟),我想让它的图标无限旋转。
我该如何处理这种效果?谢谢。
添加文件 res/layout/iv_refresh.xml
(将 ic_launcher 替换为您的自定义图标):
<?xml version="1.0" encoding="utf-8"?>
<ImageView
xmlns:android="http://schemas.android.com/apk/res/android"
style="@android:style/Widget.ActionButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="@string/app_name"
android:src="@drawable/ic_launcher" />
添加文件res/anim/rotate_refresh.xml
:
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="1000"
android:fromDegrees="0"
android:interpolator="@android:anim/linear_interpolator"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="360">
</rotate>
最后,在您的 java 代码中,您可以像这样启动动画:
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ImageView iv = (ImageView)inflater.inflate(R.layout.iv_refresh, null);
Animation rotation = AnimationUtils.loadAnimation(this, R.anim.rotate_refresh);
rotation.setRepeatCount(Animation.INFINITE);
iv.startAnimation(rotation);
menu.findItem(R.id.my_menu_item_id).setActionView(iv);
最好的方法在这里:
public class HomeActivity extends AppCompatActivity {
public static ActionMenuItemView btsync;
public static RotateAnimation rotateAnimation;
@Override
protected void onCreate(Bundle savedInstanceState) {
rotateAnimation = new RotateAnimation(360, 0, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
rotateAnimation.setDuration((long) 2*500);
rotateAnimation.setRepeatCount(Animation.INFINITE);
然后:
private void sync() {
btsync = this.findViewById(R.id.action_sync); //remember that u cant access this view at onCreate() or onStart() or onResume() or onPostResume() or onPostCreate() or onCreateOptionsMenu() or onPrepareOptionsMenu()
if (isSyncServiceRunning(HomeActivity.this)) {
showConfirmStopDialog();
} else {
if (btsync != null) {
btsync.startAnimation(rotateAnimation);
}
Context context = getApplicationContext();
context.startService(new Intent(context, SyncService.class));
}
}
记住 你不能在 onCreate() 或 onStart() 或 onResume() 或 onPostResume() 或 onPostCreate() 或 onCreateOptionsMenu() 或onPrepareOptionsMenu() 如果你想在 activity 开始后得到它,请把它放在延迟后:
public static void refreshSync(Activity context) {
Handler handler = new Handler(Looper.getMainLooper());
handler.postDelayed(new Runnable() {
public void run() {
btsync = context.findViewById(R.id.action_sync);
if (btsync != null && isSyncServiceRunning(context)) {
btsync.startAnimation(rotateAnimation);
} else if (btsync != null) {
btsync.clearAnimation();
}
}
}, 1000);
}