[英]Android Spotlight Always on Corner point
与示例相同,但在我的项目中,聚光灯总是显示在角落里,我该怎么办? 或同一图书馆的任何优惠?
这是我的代码
View one = findViewById(R.id.img_drawer);
int[] oneLocation = new int[2];
one.getLocationInWindow(oneLocation);
float oneX = oneLocation[0] + one.getWidth() / 2f;
float oneY = oneLocation[1] + one.getHeight() / 2f;
// make an target
SimpleTarget firstTarget = new SimpleTarget.Builder(TripActivity.this).setPoint(oneX, oneY)
.setRadius(100f)
.setTitle("first title")
.setDescription("first description")
.build();
Spotlight.with(TripActivity.this)
.setDuration(1000L)
.setAnimation(new DecelerateInterpolator(2f))
.setTargets(firstTarget)
.setOnSpotlightStartedListener(new OnSpotlightStartedListener() {
@Override
public void onStarted() {
Toast.makeText(TripActivity.this, "spotlight is started", Toast.LENGTH_SHORT)
.show();
}
})
.setOnSpotlightEndedListener(new OnSpotlightEndedListener() {
@Override
public void onEnded() {
Toast.makeText(TripActivity.this, "spotlight is ended", Toast.LENGTH_SHORT).show();
}
})
.start();
实际上,您的聚光灯目标是在目标视图实际膨胀和创建之前创建的。 要解决此问题,您必须仅在视图膨胀后创建聚光灯目标。
View one = findViewById(R.id.img_drawer);
int[] oneLocation = new int[2];
one.getLocationInWindow(oneLocation);
float oneX = oneLocation[0] + one.getWidth() / 2f;
float oneY = oneLocation[1] + one.getHeight() / 2f;
所以在上面的代码示例中,oneX 和 oneY 变为 0,因此您的聚光灯目标移动到左上角,只有四分之一可见。
使用可以从任何视图调用的 post 方法。 Post 方法采用一个可运行线程,并确保一旦视图正确膨胀,此 post 可运行线程中的所有内容都会执行。
// create globally
SimpleTarget firstTarget = null;
// do this in onCreate of Activity or in onCreateView of Fragment
View one = findViewById(R.id.img_drawer);
one.post(new Runnable(){
@Override
public void run(){
int[] oneLocation = new int[2];
one.getLocationInWindow(oneLocation);
float oneX = oneLocation[0] + one.getWidth() / 2f;
float oneY = oneLocation[1] + one.getHeight() / 2f;
// make a target
firstTarget = new SimpleTarget.Builder(TripActivity.this)
.setPoint(oneX, oneY)
.setRadius(100f)
.setTitle("first title")
.setDescription("first description")
.build();
}
});
// Do this in onStart of Activity or in onViewCreated of Fragment
if (firstTarget != null)
Spotlight.with(TripActivity.this)
.setDuration(1000L)
.setAnimation(new DecelerateInterpolator(2f))
.setTargets(firstTarget)
.setOnSpotlightStartedListener(new OnSpotlightStartedListener() {
@Override
public void onStarted() {
Toast.makeText(TripActivity.this, "spotlight is started", Toast.LENGTH_SHORT).show();
}
})
.setOnSpotlightEndedListener(new OnSpotlightEndedListener() {
@Override
public void onEnded() {
Toast.makeText(TripActivity.this, "spotlight is ended", Toast.LENGTH_SHORT).show();
}
})
.start();
您的视图尚未准备好,您必须在doOnPreDraw
调用它(我使用的是 core-ktx lib)
binding.root.doOnPreDraw {
showSpotlight() // call it here
}
这背后的原因是视图(您要突出显示的元素)尚未绘制到您的根布局中,而您正试图在其上添加聚光灯。
下面的解决方案解决了我的问题。
view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override public void onGlobalLayout() {
view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
SimpleTarget target = new SimpleTarget.Builder(activity)
.setPoint(view)
.setRadius(radius)
.setTitle(title)
.setDescription(description)
.build();
Spotlight.with(activity)
.setDuration(500L)
.setDuration(500L)
.setAnimation(new DecelerateInterpolator(1f))
.setTargets(target)
.setOnSpotlightStartedListener(new OnSpotlightStartedListener() {
@Override
public void onStarted() {
}
})
.setOnSpotlightEndedListener(new OnSpotlightEndedListener() {
@Override
public void onEnded() {
App.getLocalStorage().write(sharedPrefKey, true);
}
})
.start();
}
});
从您的 xml 文件中找到您的根布局,然后
rootlayout.post { // 编写用于创建目标和聚光灯的代码 }
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