Sphero Android不能实例化球形连接视图
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21-12-2019 - |
题
我正在尝试学习Sphero Android SDK,然后追随官方教程。 首先我将RobotLibrary.jar成功地添加到我的项目中,没有编译错误。接下来我将SpheroconnectionView查看到我的布局文件,如下所示:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ff888888" >
<orbotix.view.connection.SpheroConnectionView
android:id="@+id/sphero_connection_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#FFF" />
</LinearLayout>
.
然后我将以下代码添加到mainActivity.java
public class MainActivity extends Activity {
private SpheroConnectionView mSpheroConn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mSpheroConn=(SpheroConnectionView)findViewById(R.id.sphero_connection_view);
}
}
.
我希望看到通常的sphero连接视图,(这是一个非常简单的代码),但它抛出这样的例外:
02-25 15:15:53.161:e / androidruntime(1241):java.lang.runtimeexception:无法启动活动ComponentInfo {com.ecem.spheroblank / com.ecem.spheroblank.maeactivity}:android.view。formateException:二进制XML文件行#7:outcloud类orbotix.view.Connection.PheroconnectionView
这是完整的堆栈特许道:
02-25 15:15:53.161: E/AndroidRuntime(1241): FATAL EXCEPTION: main
02-25 15:15:53.161: E/AndroidRuntime(1241): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ecem.spheroblank/com.ecem.spheroblank.MainActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class orbotix.view.connection.SpheroConnectionView
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.app.ActivityThread.access$600(ActivityThread.java:130)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.os.Handler.dispatchMessage(Handler.java:99)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.os.Looper.loop(Looper.java:137)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.app.ActivityThread.main(ActivityThread.java:4745)
02-25 15:15:53.161: E/AndroidRuntime(1241): at java.lang.reflect.Method.invokeNative(Native Method)
02-25 15:15:53.161: E/AndroidRuntime(1241): at java.lang.reflect.Method.invoke(Method.java:511)
02-25 15:15:53.161: E/AndroidRuntime(1241): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
02-25 15:15:53.161: E/AndroidRuntime(1241): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-25 15:15:53.161: E/AndroidRuntime(1241): at dalvik.system.NativeStart.main(Native Method)
02-25 15:15:53.161: E/AndroidRuntime(1241): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class orbotix.view.connection.SpheroConnectionView
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.view.LayoutInflater.createView(LayoutInflater.java:613)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
02-25 15:15:53.161: E/AndroidRuntime(1241): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:256)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.app.Activity.setContentView(Activity.java:1867)
02-25 15:15:53.161: E/AndroidRuntime(1241): at com.ecem.spheroblank.MainActivity.onCreate(MainActivity.java:20)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.app.Activity.performCreate(Activity.java:5008)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
02-25 15:15:53.161: E/AndroidRuntime(1241): ... 11 more
02-25 15:15:53.161: E/AndroidRuntime(1241): Caused by: java.lang.reflect.InvocationTargetException
02-25 15:15:53.161: E/AndroidRuntime(1241): at java.lang.reflect.Constructor.constructNative(Native Method)
02-25 15:15:53.161: E/AndroidRuntime(1241): at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
02-25 15:15:53.161: E/AndroidRuntime(1241): at android.view.LayoutInflater.createView(LayoutInflater.java:587)
02-25 15:15:53.161: E/AndroidRuntime(1241): ... 22 more
02-25 15:15:53.161: E/AndroidRuntime(1241): Caused by: java.lang.ExceptionInInitializerError
02-25 15:15:53.161: E/AndroidRuntime(1241): at orbotix.view.connection.SpheroConnectionView.startDiscovery(SpheroConnectionView.java:236)
02-25 15:15:53.161: E/AndroidRuntime(1241): at orbotix.view.connection.SpheroConnectionView.<init>(SpheroConnectionView.java:215)
02-25 15:15:53.161: E/AndroidRuntime(1241): ... 25 more
02-25 15:15:53.161: E/AndroidRuntime(1241): Caused by: java.lang.NullPointerException
02-25 15:15:53.161: E/AndroidRuntime(1241): at orbotix.robot.base.RobotProvider.<init>(RobotProvider.java:161)
02-25 15:15:53.161: E/AndroidRuntime(1241): at orbotix.robot.base.RobotProvider.<clinit>(RobotProvider.java:78)
02-25 15:15:53.161: E/AndroidRuntime(1241): ... 27 more
.
所以我怎么能修复它?
解决方案
最后,我发现了答案。我正在写下来,所以对Sphero Android SDK的兴趣可能有所帮助。
右键单击项目>选择属性>>打开“Java Compiler”部分。 确保您检查了“启用项目特定设置”并将“编译器合规级别”设置为1.6!
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