我正在使用Android Studio，并试图在VR中显示一些选定的街景路径。我已经可以很好地运行街景了，现在我正试图在VR中显示它。
我将com.google.vr.sdk.widgets.pano.VrPanoramaView放在了布局中，并在我的类的onCreate内，通过VrPanoramaView将其引用到findViewById变量中。现在，我试图显示一个图像，该图像调用我在此类中定义的方法loadPanoImage。此方法从存储中加载图像并通过loadImageFromBitmap显示。
问题在于，即使我已按照指南进行操作，但已完成显示的所有操作，它仍然无法显示任何内容。我什至尝试在代码的不同部分调用它（在执行任何其他操作之前，在单击按钮之前，在显示街景视图之前和之后），但我不明白为什么它不起作用以及如何能够用它来显示从StreetView拍摄的图像（我不知道我是否能够做到这一点，还是应该下载并将它们放入存储设备中。）
我将部分代码供参考：
public class VrExperience extends FragmentActivity {
Button buttonCitta;
Button buttonMare;
Button buttonMontagna;
TextView titleTextView;
// George St, Sydney
private static final LatLng SYDNEY = new LatLng(-33.87365, 151.20689);
// LatLng with no panorama
private static final LatLng INVALID = new LatLng(-45.125783, 151.276417);
//VrPanoramaView is inserted in the layout
private VrPanoramaView panoWidgetView;
//StreetViewPanorama is another class in my project which shows Street View
private StreetViewPanorama mStreetViewPanorama;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_vrexperiences);
panoWidgetView = (VrPanoramaView) findViewById(R.id.pano_view);
panoWidgetView.setEventListener(new VrPanoramaEventListener());
//download image and show it, but it doesn't show anything
loadPanoImage();
titleTextView = (TextView) findViewById(R.id.titleTextView);
buttonCitta = (Button) findViewById(R.id.buttonCitta);
buttonCitta.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (!checkReady()) {
return;
}
titleTextView.setVisibility(View.GONE);
buttonCitta.setVisibility(View.GONE);
buttonMare.setVisibility(View.GONE);
buttonMontagna.setVisibility(View.GONE);
loadPanoImage(); //it doesn't show anything
mStreetViewPanorama.setPosition(SYDNEY);
loadPanoImage(); //it doesn't show anything
}
}};
//code for buttonMontagna and buttonMare as well, it's identical
SupportStreetViewPanoramaFragment streetViewPanoramaFragment =
(SupportStreetViewPanoramaFragment)
getSupportFragmentManager().findFragmentById(R.id.streetviewpanorama);
streetViewPanoramaFragment.getStreetViewPanoramaAsync(
new OnStreetViewPanoramaReadyCallback() {
@Override
public void onStreetViewPanoramaReady(StreetViewPanorama panorama) {
mStreetViewPanorama = panorama;
// Only set the panorama to INVALID on startup (when no panoramas have been
// loaded which is when the savedInstanceState is null).
if (savedInstanceState == null) {
mStreetViewPanorama.setPosition(INVALID);
}
}
});
}
/**
* When the panorama is not ready the PanoramaView cannot be used. This should be called on
* all entry points that call methods on the Panorama API.
*/
private boolean checkReady() {
if (mStreetViewPanorama == null)
return false;
return true;
}
/**
* Called when the Animate To Invalid button is clicked.
*/
public void onGoToInvalid(View view) {
if (!checkReady()) {
return;
}
mStreetViewPanorama.setPosition(INVALID);
}
//retrieves image from the assets folder and loads it into the VrPanoramaView
private void loadPanoImage() {
VrPanoramaView.Options options = new VrPanoramaView.Options();
InputStream inputStream = null;
AssetManager assetManager = getAssets();
try {
inputStream = assetManager.open("demo2.jpg");
options.inputType = VrPanoramaView.Options.TYPE_MONO;
panoWidgetView.loadImageFromBitmap(
BitmapFactory.decodeStream(inputStream), options
);
inputStream.close();
} catch (IOException e) {
Log.e("Fail", "Exception in loadPanoImage" + e.getMessage());
}
}
@Override
protected void onPause() {
panoWidgetView.pauseRendering();
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
panoWidgetView.resumeRendering();
}
@Override
protected void onDestroy() {
panoWidgetView.shutdown();
super.onDestroy();
}
}
这是我的布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/vrExperienceActivity"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.google.vr.sdk.widgets.pano.VrPanoramaView
android:id="@+id/pano_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dip"
android:layout_weight="5"
android:scrollbars="none" />
<TextView
android:id="@+id/titleTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:text="VR Experience"
android:textAlignment="center"
android:textAppearance="@android:style/TextAppearance.Large"
android:textColor="#0000F0"
android:visibility="visible" />
<Button
android:id="@+id/buttonCitta"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Città" />
<fragment
class="com.google.android.gms.maps.SupportStreetViewPanoramaFragment"
android:id="@+id/streetviewpanorama"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
编辑：@LucioB
a）这些是我尝试调用loadPanoImage的地方，但它们均未显示任何内容。就像调用该方法没有发生任何事情一样，程序继续执行其他任务。我希望在单击按钮时直接在VR中显示图像，或者如果无法在街景视图模式下添加经典硬纸板按钮以传递到VR视图，则为
。
b）我的意思是代码没有按照我的预期做。我以为，一旦在布局中创建VrPanoramaView并将其用于通过.loadImageFromBitmap显示图像，它就会显示我从资产加载的图像（我有一个图像保存在虚拟SD上），能够针对单个图像做到这一点，我会找到一种针对整个路径进行成像的方法。
该代码没有给出任何异常，我认为我犯了逻辑错误，或者我不了解VR api的工作原理。
编辑：我发现Java代码正在运行，问题出在布局中，该布局不允许看到VrPanoramaView，因为它被StreetViewPanorama遮盖了