我正在处理地图活动,并且在尝试放置浮动操作按钮时我遇到了错误。
这是我的XML文件。
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_marginTop="0dp"
android:layout_marginBottom="0dp"
android:layout_marginLeft="0dp"
android:layout_marginRight="0dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
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.avinashk.rns.MapsActivity"
tools:layout="@layout/abc_action_bar_title_item" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
android:src="@android:drawable/ic_dialog_email" />
</LinearLayout>
这是地图活动的清单。
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key" />
<activity
android:name=".MapsActivity"
android:label="@string/title_activity_maps"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"/>
这是地图活动的onCreate。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(MapsActivity.this);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//double result = CalculationByDistance(rns,);
Snackbar.make(view, "You are DD distance from the college", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});}
渲染问题日志是:
The following classes could not be instantiated:
- android.support.design.widget.FloatingActionButton (Open Class, Show Exception, Clear Cache)
Tip: Use View.isInEditMode() in your custom views to skip code or show sample data when shown in the IDE Exception Details java.lang.IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library. at android.support.design.widget.ThemeUtils.checkAppCompatTheme(ThemeUtils.java:34) at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:110) at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:104) at java.lang.reflect.Constructor.newInstance(Constructor.java:422) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:835) at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70) at android.view.LayoutInflater.rInflate(LayoutInflater.java:811) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) at android.view.LayoutInflater.inflate(LayoutInflater.java:515) at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
答案 0 :(得分:2)
确保您已正确添加Support Library
,如下所示:
public class MapsActivity extends AppCompatActivity
你没有检查这个错误:
提示:在自定义视图中使用View.isInEditMode()来跳过代码或显示 IDE异常详细信息中显示的示例数据 java.lang.IllegalArgumentException: 您需要使用Theme.AppCompat 设计库的主题(或后代) 。
在您的依赖项中检查:
compile 'com.android.support:support-v4:23.1.1'
同步它,你准备好了。
还有一件事,如果您尝试按照以下链接进行操作,我宁愿使用来自支持库的CoordinatorLayout
:
可以是这样的:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/fab_coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#EEEEEE"
android:fitsSystemWindows="true">
<android.support.v4.widget.NestedScrollView
android:id="@+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<!--your fragment could be here-->
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.AppBarLayout
android:id="@+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
</android.support.design.widget.AppBarLayout>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:src="@drawable/ic_remove_acc"
app:backgroundTint="#DD2C00"
app:fabSize="normal"
app:layout_anchor="@id/fab_coordinator_layout"
app:layout_anchorGravity="right|bottom" />
</android.support.design.widget.CoordinatorLayout>