我有一个包含谷歌地图的片段:
<com.google.android.gms.maps.MapView
android:id="@+id/mapview"
android:layout_width="match_parent"
android:layout_height="match_parent"
map:cameraZoom="13"
map:mapType="normal"
map:uiZoomControls="false"
map:uiRotateGestures="true"
map:uiScrollGestures="true"
map:uiZoomGestures="true"
map:uiTiltGestures="false" />
地图占据整个屏幕并启用了 mylocation:
map.setMyLocationEnabled(true);
下面的代码should将 mylocation 按钮与屏幕左上角对齐:
// Get the mylocation button view
View locationButton = ((View) mapview.findViewById(Integer.parseInt("1")).getParent()).findViewById(Integer.parseInt("2"));
RelativeLayout.LayoutParams rlp = (RelativeLayout.LayoutParams) locationButton.getLayoutParams();
rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP);
rlp.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
但是 - 这只会将按钮与屏幕的顶部中心对齐。但是,如果我添加以下内容:
if (Build.VERSION.SDK_INT >= 17) {
rlp.addRule(RelativeLayout.ALIGN_PARENT_START);
}
然后它正确地向左对齐。问题是 ALIGN_PARENT_START 在 api 17 之前无法以编程方式使用,我需要从较低的 api 级别提供支持。为什么align_parent_left不自行将按钮向左对齐?
这是我移动“我的位置”按钮的实现:
<LinearLayout
android:layout_width="match_parent" android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="1"
android:name="com.google.android.gms.maps.SupportMapFragment">
</fragment>
.
.
.
关于我的活动:
mapFragment = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.myMap));
//if you're using a fragment use:
//mapFragment = ((SupportMapFragment) getChildFragmentManager() .findFragmentById(R.id.myMap));
mapFragment.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
//add map adjustments here//
//then this is where you move the my location button
View locationButton = ((View) mapFragment.getView().findViewById(Integer.parseInt("1")).
getParent()).findViewById(Integer.parseInt("2"));
// and next place it, for exemple, on bottom right (as Google Maps app)
RelativeLayout.LayoutParams rlp = (RelativeLayout.LayoutParams) locationButton.getLayoutParams();
// position on right bottom
rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP, 0);
rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
rlp.setMargins(0, 0, 30, 30);
}
});
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