本文介绍了创建叠加 ImageView 动画 Google Map的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试让我的叠加图像执行以下操作:
I am trying to make my overlay image to do following things:
- 地图的onClick/onDrag，在地图中间显示一个恒定的图像这是一个别针
- onTouchUp ，将标记图像更改为加载标记和一次数据加载完整更改加载图像到带有文本的新图像.
这是一个与我的问题非常相似的解决方案:
Here is a pretty similar solution to my problem:
到目前为止我做了什么?
What i have done so far ?
- 在我的谷歌地图中间放了一个图像视图，然后得到了使用
mMap.getCameraPosition().target定位该 imageView它给出了大约中间位置坐标使用setOnCameraChanged，我知道它已被弃用，有更好的解决方案?. - 其余部分我无法弄清楚，尽管我已经阅读了几个 SO 问题，声称他们已经实现了将框架布局包装在谷歌地图片段上，并在其上应用 onTouch，但也找不到该问题的真实答案.
- Placed an imageview over my google map in the middle , and got
loacation of that imageView using
mMap.getCameraPosition().targetwhich gives approx middle position coordinates usingsetOnCameraChanged, i know that's deprecated, well have a better solution?. - Rest of the part i can't figure out , though i have read several SO questions claiming they have implemented it wrapping framelayout over fragment of google map, and applying onTouch on that, but cannot find an authentic answer to that one too.
所有这一切发生的片段的 xml 看起来像这样:
my xml of fragment where all this is happening looks like this :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".fragments.MovableMapFragment">
<fragment
android:id="@+id/map_frag_fmm"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/tablayout_global_tabs"
android:layout_alignParentTop="true" />
<! -- long xml ahead -->
有人知道如何实现这种行为吗?
Someone know how to achieve this kind of behavior ?
推荐答案
最好的解决方案是使用 RxJava/RxAndroid 并使用它执行后台任务，但我无法在没有看到您的代码的情况下使用 rx 发布解决方案，并且@user27799 已经有一个示例，@Manas Chaudhari 也提供了很好的解释的逻辑(在下面).
The best solution would be to use RxJava/RxAndroid and do background tasks with it, but I can't post a solution using rx without seeing your code and there's already an example from @user27799 also @Manas Chaudhari provided a great explanation of the logic (down below).
//bunch of imports
import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback
{
private GoogleMap mGoogleMap;
private FrameLayout frameLayout, circleFrameLayout;
private ProgressBar progress;
private TextView textView;
private int circleRadius;
private boolean isMoving = false;
private SupportMapFragment mapFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
initViews();
}
private void initViews() {
frameLayout = (FrameLayout) findViewById(R.id.map_container);
circleFrameLayout = (FrameLayout) frameLayout.findViewById(R.id.pin_view_circle);
textView = (TextView) circleFrameLayout.findViewById(R.id.textView);
progress = (ProgressBar) circleFrameLayout.findViewById(R.id.profile_loader);
mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
private void moveMapCamera() {
if (mGoogleMap == null) {
return;
}
CameraUpdate center = CameraUpdateFactory
.newLatLng(new LatLng(40.76793169992044, -73.98180484771729));
CameraUpdate zoom = CameraUpdateFactory.zoomTo(15);
mGoogleMap.moveCamera(center);
mGoogleMap.animateCamera(zoom);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
mGoogleMap.setOnCameraMoveStartedListener(new GoogleMap.OnCameraMoveStartedListener() {
/* User starts moving map - change your pin's image here
*/
@Override
public void onCameraMoveStarted(int i) {
isMoving = true;
textView.setVisibility(View.GONE);
progress.setVisibility(View.GONE);
Drawable mDrawable;
if (Build.VERSION.SDK_INT >= 21)
mDrawable = getApplicationContext().getResources().getDrawable(R.drawable.circle_background_moving, null);
else
mDrawable = getApplicationContext().getResources().getDrawable(R.drawable.circle_background_moving);
circleFrameLayout.setBackground(mDrawable);
resizeLayout(false);
}
});
/*User stoped moving map -> retrieve location and do your background task */
mGoogleMap.setOnCameraIdleListener(new GoogleMap.OnCameraIdleListener() {
@Override
public void onCameraIdle() {
isMoving = false;
textView.setVisibility(View.INVISIBLE);
progress.setVisibility(View.VISIBLE);
resizeLayout(true);
/* this is just an example that simulates data loading
you shoud substitute it with your logic
*/
new Handler().postDelayed(new Runnable() {
public void run() {
Drawable mDrawable;
if (Build.VERSION.SDK_INT >= 21)
mDrawable = getApplicationContext().getResources().getDrawable(R.drawable.circle_background, null);
else
mDrawable = getApplicationContext().getResources().getDrawable(R.drawable.circle_background);
if (!isMoving) {
circleFrameLayout.setBackground(mDrawable);
textView.setVisibility(View.VISIBLE);
progress.setVisibility(View.GONE);
}
}
}, 1500);
}
});
MapsInitializer.initialize(this);
moveMapCamera();
}
//resing circle pin
private void resizeLayout(boolean backToNormalSize){
FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) circleFrameLayout.getLayoutParams();
ViewTreeObserver vto = circleFrameLayout.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
circleFrameLayout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
circleRadius = circleFrameLayout.getMeasuredWidth();
}
});
if (backToNormalSize) {
params.width = WRAP_CONTENT;
params.height = WRAP_CONTENT;
params.topMargin = 0;
} else {
params.topMargin = (int) (circleRadius * 0.3);
params.height = circleRadius - circleRadius / 3;
params.width = circleRadius - circleRadius / 3;
}
circleFrameLayout.setLayoutParams(params);
}
}
在屏幕中央带有大头针的布局文件:
Layout file with pin in the center of the screen:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.mapstest.MapsActivity" />
<FrameLayout
android:id="@+id/pin_view_line"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="@dimen/line_top_margin"
android:background="@drawable/line_background"/>
<FrameLayout
android:id="@+id/pin_view_circle"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/circle_background">
<TextView
android:id="@+id/textView"
android:layout_margin="@dimen/inner_circle_margin"
android:layout_width="@dimen/inner_circle_radius"
android:layout_height="@dimen/inner_circle_radius"
android:layout_gravity="top|center_horizontal"
android:gravity="center"
android:text="12 min"
android:textSize="@dimen/text_size"
android:textColor="@android:color/white"/>
<ProgressBar
android:id="@+id/profile_loader"
android:layout_margin="@dimen/inner_circle_margin"
android:layout_width="@dimen/inner_circle_radius"
android:layout_height="@dimen/inner_circle_radius"
android:indeterminate="true"
android:layout_gravity="top|center_horizontal"
android:visibility="gone"
android:contentDescription="@null"/>
</FrameLayout>
不动时的圆形背景:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid android:color="@android:color/holo_green_dark"/>
<stroke
android:width="@dimen/stroke_width"
android:color="@android:color/black"/>
<size
android:width="@dimen/circle_radius"
android:height="@dimen/circle_radius"/>
</shape>
地图移动时的圆形背景:
Circle background when map is moving:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid android:color="@android:color/black"/>
<size
android:width="@dimen/circle_radius"
android:height="@dimen/circle_radius"/>
</shape>
线条背景文件:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="@android:color/black"/>
<size
android:width="@dimen/line_width"
android:height="@dimen/line_height"/>
</shape>
尺寸:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<dimen name="circle_radius">48dp</dimen>
<dimen name="line_width">4dp</dimen>
<dimen name="line_height">40dp</dimen>
<dimen name="stroke_width">4dp</dimen>
<dimen name="text_size">10sp</dimen>
<dimen name="inner_circle_radius">40dp</dimen>
<dimen name="inner_circle_margin">4dp</dimen>
<dimen name="line_top_margin">20dp</dimen>
</resources>
我希望它对您有所帮助，但如果您有任何问题，请随时提出，或者如果您发现需要改进的地方 - 请编辑我的解决方案.
I hope it helps you, but if you have any questions feel free to ask or if you see areas that you'd improve - edit my solution.
干杯.
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