在使用融合位置提供程序的 Android Wear 上启动、关闭和重新启动活动时,我遇到了崩溃。
场景是:启动连接到融合的位置提供者的活动,关闭活动(同时与融合的位置提供者断开连接)并重新启动应用程序会导致新启动的活动崩溃,并出现以下异常:
01-31 18:51:15.319 2281-2281/com.example.test E/ActivityThread﹕ Performing pause of activity that is not resumed: {com.example.test/com.example.test.WearActivity}
java.lang.RuntimeException: Performing pause of activity that is not resumed: {com.example.test/com.example.test.WearActivity}
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3196)
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3184)
at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3159)
at android.app.ActivityThread.access$1000(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1289)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
当 Android Wear 设备连接到手机并且融合位置提供程序返回“融合”位置时,可能会遇到崩溃。在没有连接电话的情况下使用位置提供程序时,不会出现崩溃。
当从应用程序列表重新启动活动时,新创建的活动会经历创建 -> 开始 -> 恢复阶段,然后直接进入停止而不暂停。
这会导致手表锁定,因此您无法再使用语音命令。不过,您仍然可以在主屏幕上滚动浏览卡片。按下设备按钮打开和关闭屏幕会“解锁”设备,logcat 会打印出上述异常。
有时它需要两次或多次重启应用程序才能导致崩溃,但它是可重现的。在 nexus 6 上运行相同的应用程序不会导致任何问题。
以下代码重现了该问题:
public class WearActivity extends Activity implements ConnectionCallbacks, OnConnectionFailedListener {
private GoogleApiClient apiClient;
private LocationListener locationListener;
@Override
protected void onStart() {
super.onStart();
Log.v("Wear", "onStart");
apiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
apiClient.connect();
}
@Override
protected void onStop() {
super.onStop();
Log.v("Wear", "onStop");
if (locationListener != null) {
FusedLocationApi.removeLocationUpdates(apiClient, locationListener);
System.out.println("removing");
locationListener = null;
}
if (apiClient.isConnected()) {
apiClient.disconnect();
}
}
@Override
public void onConnected(Bundle bundle) {
System.out.println("connection established");
if (locationListener == null) {
locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
System.out.println(location);
}
};
FusedLocationApi.requestLocationUpdates(apiClient, createLocationRequest(), locationListener);
}
}
private LocationRequest createLocationRequest() {
return new LocationRequest()
.setInterval(2000)
.setFastestInterval(2000)
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
@Override
public void onConnectionSuspended(int i) {
System.out.println("connection suspended");
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
System.out.println("connection failed");
}
}
在运行 Android 5.0.1(构建 LWX48P)的 Sony Smartwatch 3 上看到。