DirectionsApiRequest 和 apiRequest.setCallback 的问题
Problem with DirectionsApiRequest and apiRequest.setCallback
编写了一种在两点之间创建和叠加路线的方法。问题是，当它在正常模式下触发时（没有断点），它会导致 NullPointerException 或 IllegalStateException，但是当我 运行 我的应用程序处于调试模式时，它什么都不抛出并正常工作。
我很抱歉我的英语不好（我来自俄罗斯），对于问题的提出我深表歉意，我仍然不太熟悉 Whosebug。
这是我的方法：
List<com.google.maps.model.LatLng> path;
DirectionsRoute[] routes;
DisplayMetrics metricsB = new DisplayMetrics();
int width = metricsB.widthPixels;
int heith = metricsB.heightPixels;
PolylineOptions line = new PolylineOptions();
LatLngBounds.Builder latLngBuilder = new LatLngBounds.Builder();
String dist;
public void TravelCost(LatLng startGeoPoint, LatLng stopGeoPoint) throws InterruptedException,
ApiException, IOException {
GeoApiContext geoApiContext = new GeoApiContext.Builder()
.apiKey(maps_api_key)
.build();
DirectionsApiRequest apiRequest = DirectionsApi.newRequest(geoApiContext);
apiRequest.origin(new com.google.maps.model.LatLng(startGeoPoint.latitude, startGeoPoint.longitude));
apiRequest.destination(new com.google.maps.model.LatLng(stopGeoPoint.latitude, stopGeoPoint.longitude));
apiRequest.mode(TravelMode.DRIVING); //set travelling mode
apiRequest.setCallback(new com.google.maps.PendingResult.Callback<DirectionsResult>() {
@Override
public void onResult(DirectionsResult result) {
routes = result.routes;
path = routes[0].overviewPolyline.decodePath();
dist = routes[0].legs[0].distance.humanReadable;
for (int i = 0; i < path.size(); i++) {
line.add(new com.google.android.gms.maps.model.LatLng(path.get(i).lat, path.get(i).lng));
latLngBuilder.include(new com.google.android.gms.maps.model.LatLng(path.get(i).lat, path.get(i).lng));
}
}
@Override
public void onFailure(Throwable e) {
Toast.makeText(MapsActivity.this, "Error!", Toast.LENGTH_SHORT).show();
}
});
line.width(16f).color(R.color.purple_500);
map.addPolyline(line);
LatLngBounds latLngBounds = latLngBuilder.build();
CameraUpdate track = CameraUpdateFactory.newLatLngBounds(latLngBounds, 1080, 1920, 25);
map.moveCamera(track);
}
以下是日志中的错误：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.plukash.travelcost, PID: 19561
java.lang.IllegalStateException: Could not execute method for android:onClick
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:414)
at android.view.View.performClick(View.java:7448)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
at android.view.View.performClickInternal(View.java:7425)
at android.view.View.access00(View.java:810)
at android.view.View$PerformClick.run(View.java:28305)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:409)
at android.view.View.performClick(View.java:7448)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
at android.view.View.performClickInternal(View.java:7425)
at android.view.View.access00(View.java:810)
at android.view.View$PerformClick.run(View.java:28305)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.IllegalStateException: no included points
at com.google.android.gms.common.internal.Preconditions.checkState(Unknown Source:29)
at com.google.android.gms.maps.model.LatLngBounds$Builder.build(Unknown Source:21)
at com.plukash.travelcost.MapsActivity.TravelCost(MapsActivity.java:305)
at com.plukash.travelcost.MapsActivity.onMapSearch(MapsActivity.java:142)
at java.lang.reflect.Method.invoke(Native Method)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:409)
at android.view.View.performClick(View.java:7448)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
at android.view.View.performClickInternal(View.java:7425)
at android.view.View.access00(View.java:810)
at android.view.View$PerformClick.run(View.java:28305)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
这是 XML-布局文件。
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/bottom_sheet_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:orientation="horizontal">
<EditText
android:id="@+id/LocSearch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="4"
android:hint="Куда поедем?"
android:inputType="text"
tools:ignore="Autofill,HardcodedText" />
<Button
android:id="@+id/search_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:onClick="onMapSearch" <------- OnClick Method
android:text="Search"
tools:ignore="HardcodedText" />
</LinearLayout>
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity"
tools:ignore="FragmentTagUsage" />
</LinearLayout>
<include layout="@layout/bottom_sheet" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="15dp"
android:src="@drawable/go_px"
app:layout_anchor="@+id/bottom_sheet"
app:layout_anchorGravity="top|end"
tools:ignore="ContentDescription" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
这里是搜索按钮的点击方法，它调用“TravelCost”方法。
public void onMapSearch(View view) throws InterruptedException, ApiException, IOException {
boolean bool = TrafficJam();
try {
Button search = findViewById(R.id.search_button);
String location = locationSearch.getText().toString();
List<Address> addressList;
Geocoder geocoder = new Geocoder(this);
try {
addressList = geocoder.getFromLocationName(location, 1);
} catch (IOException e) {
e.printStackTrace();
Toast toast = new Toast(this);
toast.setText("Введите корректный адрес!");
toast.show();
return;
}
if (addressList != null) {
Address address = addressList.get(0);
latLng = new LatLng(address.getLatitude(), address.getLongitude());
map.addMarker(new MarkerOptions().position(latLng).title("Marker"));
map.animateCamera(CameraUpdateFactory.newLatLng(latLng));
//Убирать ли текст в поисковом поле?
//locationSearch.setText("");
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(search.getWindowToken(),
InputMethodManager.HIDE_NOT_ALWAYS);
} else {
Toast toast = new Toast(this);
toast.setText("Введите адрес!");
toast.show();
}
} catch (Exception e) {
Toast toast = new Toast(this);
toast.setText("Введите корректный адрес!");
toast.show();
return;
}
if (checker == 1) {
startpoint = latLng;
checker += 1;
locationSearch.setText("");
locationSearch.setHint("Куда поедем?");
} else if (checker == 2) {
LatLng endpoint = latLng;
locationSearch.setText("Откуда поедем?");
checker = 1;
TravelCost(startpoint, endpoint); <-------------- Method call
}
}
UPD
需要 return 来自其他线程的值。
DirectionsRoute[] routes;
public void TravelCost(LatLng startGeoPoint, LatLng stopGeoPoint) {
GeoApiContext geoApiContext = new GeoApiContext.Builder()
.apiKey("AIzaSyA9qY28oZ-4TTdDt1jgxdCKLYh9T8Kh0Ss")
.build();
DirectionsApiRequest apiRequest = DirectionsApi.newRequest(geoApiContext);
apiRequest.origin(new com.google.maps.model.LatLng(startGeoPoint.latitude, startGeoPoint.longitude));
apiRequest.destination(new com.google.maps.model.LatLng(stopGeoPoint.latitude, stopGeoPoint.longitude));
apiRequest.mode(TravelMode.DRIVING);
apiRequest.language("Russian");//set travelling mode
AppExecutors.getInstance().networkIO().execute(() -> {
apiRequest.setCallback(new com.google.maps.PendingResult.Callback<DirectionsResult>() {
@Override
public void onResult(DirectionsResult result) {
routes = result.routes;
<---- **routes here contains values**
}
@Override
public void onFailure(Throwable e) {
Toast.makeText(MapsActivity.this, "Error!", Toast.LENGTH_SHORT).show();
}
});
});
<---- **Here routes is nullarray.**
List<com.google.maps.model.LatLng> path = routes[0].overviewPolyline.decodePath();
dist = routes[0].legs[0].distance.humanReadable;
for (int i = 0; i < path.size(); i++) {
line.add(new com.google.android.gms.maps.model.LatLng(path.get(i).lat, path.get(i).lng));
latLngBuilder.include(new com.google.android.gms.maps.model.LatLng(path.get(i).lat, path.get(i).lng));
}
line.width(16f).color(R.color.purple_500);
map.addPolyline(line);
LatLngBounds latLngBounds = latLngBuilder.build();
CameraUpdate track = CameraUpdateFactory.newLatLngBounds(latLngBounds, 1080, 1920, 25);
map.moveCamera(track);
}
您的问题似乎与 android:onClick 系统没有找到该方法并因此抛出错误有关。
我的假设是发生这种情况是因为您 运行 在启用混淆器的情况下安装应用程序，混淆器可能正在更改方法名称，这将导致此异常。
我建议使用点击侦听器，因为使用 android:onClick
被认为是不好的做法
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Button button = findViewById(R.id.search_button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onMapSearch(v);
}
});
// implementation of an onclick listener using a lambda instead
button.setOnClickListener(v -> onMapSearch(v));
}
此外，您可以考虑删除 onMapSearch 中的视图参数，因为它不再被使用了
编辑
要修复 android.os.NetworkOnMainThreadException 您需要 运行 主线程之外的网络调用，请注意，不建议使用 AsyncTask，因为它已经被弃用很长时间了。
工人示例
public class AppExecutors {
private static final Object LOCK = new Object();
private static AppExecutors sInstance;
private static Executor processor;
private final Executor diskIO;
private final Executor networkIO;
private final Executor mainThread;
private AppExecutors(Executor diskIO, Executor networkIO, Executor mainThread){
this.diskIO = diskIO;
this.networkIO = networkIO;
this.mainThread = mainThread;
}
public static AppExecutors getInstance(){
if(sInstance == null){
synchronized (LOCK){
sInstance = new AppExecutors(Executors.newSingleThreadExecutor(),
Executors.newFixedThreadPool(3),
new MainThreadExecutor());
}
}
return sInstance;
}
public Executor diskIO() {
return diskIO;
}
public Executor networkIO() {
return networkIO;
}
public Executor getMainThread() {
return mainThread;
}
private static class MainThreadExecutor implements Executor {
private final Handler mainThreadHandler = new Handler(Looper.getMainLooper());
@Override
public void execute(@NotNull Runnable command) {
mainThreadHandler.post(command);
}
}
}
用法
AppExecutors.getInstance().networkIO().execute(() -> {
// Network call goes here
});
编写了一种在两点之间创建和叠加路线的方法。问题是，当它在正常模式下触发时（没有断点），它会导致 NullPointerException 或 IllegalStateException，但是当我 运行 我的应用程序处于调试模式时，它什么都不抛出并正常工作。
我很抱歉我的英语不好（我来自俄罗斯），对于问题的提出我深表歉意，我仍然不太熟悉 Whosebug。
这是我的方法：
List<com.google.maps.model.LatLng> path;
DirectionsRoute[] routes;
DisplayMetrics metricsB = new DisplayMetrics();
int width = metricsB.widthPixels;
int heith = metricsB.heightPixels;
PolylineOptions line = new PolylineOptions();
LatLngBounds.Builder latLngBuilder = new LatLngBounds.Builder();
String dist;
public void TravelCost(LatLng startGeoPoint, LatLng stopGeoPoint) throws InterruptedException,
ApiException, IOException {
GeoApiContext geoApiContext = new GeoApiContext.Builder()
.apiKey(maps_api_key)
.build();
DirectionsApiRequest apiRequest = DirectionsApi.newRequest(geoApiContext);
apiRequest.origin(new com.google.maps.model.LatLng(startGeoPoint.latitude, startGeoPoint.longitude));
apiRequest.destination(new com.google.maps.model.LatLng(stopGeoPoint.latitude, stopGeoPoint.longitude));
apiRequest.mode(TravelMode.DRIVING); //set travelling mode
apiRequest.setCallback(new com.google.maps.PendingResult.Callback<DirectionsResult>() {
@Override
public void onResult(DirectionsResult result) {
routes = result.routes;
path = routes[0].overviewPolyline.decodePath();
dist = routes[0].legs[0].distance.humanReadable;
for (int i = 0; i < path.size(); i++) {
line.add(new com.google.android.gms.maps.model.LatLng(path.get(i).lat, path.get(i).lng));
latLngBuilder.include(new com.google.android.gms.maps.model.LatLng(path.get(i).lat, path.get(i).lng));
}
}
@Override
public void onFailure(Throwable e) {
Toast.makeText(MapsActivity.this, "Error!", Toast.LENGTH_SHORT).show();
}
});
line.width(16f).color(R.color.purple_500);
map.addPolyline(line);
LatLngBounds latLngBounds = latLngBuilder.build();
CameraUpdate track = CameraUpdateFactory.newLatLngBounds(latLngBounds, 1080, 1920, 25);
map.moveCamera(track);
}
以下是日志中的错误：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.plukash.travelcost, PID: 19561
java.lang.IllegalStateException: Could not execute method for android:onClick
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:414)
at android.view.View.performClick(View.java:7448)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
at android.view.View.performClickInternal(View.java:7425)
at android.view.View.access00(View.java:810)
at android.view.View$PerformClick.run(View.java:28305)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:409)
at android.view.View.performClick(View.java:7448)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
at android.view.View.performClickInternal(View.java:7425)
at android.view.View.access00(View.java:810)
at android.view.View$PerformClick.run(View.java:28305)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.IllegalStateException: no included points
at com.google.android.gms.common.internal.Preconditions.checkState(Unknown Source:29)
at com.google.android.gms.maps.model.LatLngBounds$Builder.build(Unknown Source:21)
at com.plukash.travelcost.MapsActivity.TravelCost(MapsActivity.java:305)
at com.plukash.travelcost.MapsActivity.onMapSearch(MapsActivity.java:142)
at java.lang.reflect.Method.invoke(Native Method)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:409)
at android.view.View.performClick(View.java:7448)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
at android.view.View.performClickInternal(View.java:7425)
at android.view.View.access00(View.java:810)
at android.view.View$PerformClick.run(View.java:28305)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
这是 XML-布局文件。
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/bottom_sheet_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:orientation="horizontal">
<EditText
android:id="@+id/LocSearch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="4"
android:hint="Куда поедем?"
android:inputType="text"
tools:ignore="Autofill,HardcodedText" />
<Button
android:id="@+id/search_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:onClick="onMapSearch" <------- OnClick Method
android:text="Search"
tools:ignore="HardcodedText" />
</LinearLayout>
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity"
tools:ignore="FragmentTagUsage" />
</LinearLayout>
<include layout="@layout/bottom_sheet" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="15dp"
android:src="@drawable/go_px"
app:layout_anchor="@+id/bottom_sheet"
app:layout_anchorGravity="top|end"
tools:ignore="ContentDescription" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
这里是搜索按钮的点击方法，它调用“TravelCost”方法。
public void onMapSearch(View view) throws InterruptedException, ApiException, IOException {
boolean bool = TrafficJam();
try {
Button search = findViewById(R.id.search_button);
String location = locationSearch.getText().toString();
List<Address> addressList;
Geocoder geocoder = new Geocoder(this);
try {
addressList = geocoder.getFromLocationName(location, 1);
} catch (IOException e) {
e.printStackTrace();
Toast toast = new Toast(this);
toast.setText("Введите корректный адрес!");
toast.show();
return;
}
if (addressList != null) {
Address address = addressList.get(0);
latLng = new LatLng(address.getLatitude(), address.getLongitude());
map.addMarker(new MarkerOptions().position(latLng).title("Marker"));
map.animateCamera(CameraUpdateFactory.newLatLng(latLng));
//Убирать ли текст в поисковом поле?
//locationSearch.setText("");
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(search.getWindowToken(),
InputMethodManager.HIDE_NOT_ALWAYS);
} else {
Toast toast = new Toast(this);
toast.setText("Введите адрес!");
toast.show();
}
} catch (Exception e) {
Toast toast = new Toast(this);
toast.setText("Введите корректный адрес!");
toast.show();
return;
}
if (checker == 1) {
startpoint = latLng;
checker += 1;
locationSearch.setText("");
locationSearch.setHint("Куда поедем?");
} else if (checker == 2) {
LatLng endpoint = latLng;
locationSearch.setText("Откуда поедем?");
checker = 1;
TravelCost(startpoint, endpoint); <-------------- Method call
}
}
UPD
需要 return 来自其他线程的值。
DirectionsRoute[] routes;
public void TravelCost(LatLng startGeoPoint, LatLng stopGeoPoint) {
GeoApiContext geoApiContext = new GeoApiContext.Builder()
.apiKey("AIzaSyA9qY28oZ-4TTdDt1jgxdCKLYh9T8Kh0Ss")
.build();
DirectionsApiRequest apiRequest = DirectionsApi.newRequest(geoApiContext);
apiRequest.origin(new com.google.maps.model.LatLng(startGeoPoint.latitude, startGeoPoint.longitude));
apiRequest.destination(new com.google.maps.model.LatLng(stopGeoPoint.latitude, stopGeoPoint.longitude));
apiRequest.mode(TravelMode.DRIVING);
apiRequest.language("Russian");//set travelling mode
AppExecutors.getInstance().networkIO().execute(() -> {
apiRequest.setCallback(new com.google.maps.PendingResult.Callback<DirectionsResult>() {
@Override
public void onResult(DirectionsResult result) {
routes = result.routes;
<---- **routes here contains values**
}
@Override
public void onFailure(Throwable e) {
Toast.makeText(MapsActivity.this, "Error!", Toast.LENGTH_SHORT).show();
}
});
});
<---- **Here routes is nullarray.**
List<com.google.maps.model.LatLng> path = routes[0].overviewPolyline.decodePath();
dist = routes[0].legs[0].distance.humanReadable;
for (int i = 0; i < path.size(); i++) {
line.add(new com.google.android.gms.maps.model.LatLng(path.get(i).lat, path.get(i).lng));
latLngBuilder.include(new com.google.android.gms.maps.model.LatLng(path.get(i).lat, path.get(i).lng));
}
line.width(16f).color(R.color.purple_500);
map.addPolyline(line);
LatLngBounds latLngBounds = latLngBuilder.build();
CameraUpdate track = CameraUpdateFactory.newLatLngBounds(latLngBounds, 1080, 1920, 25);
map.moveCamera(track);
}
您的问题似乎与 android:onClick 系统没有找到该方法并因此抛出错误有关。
我的假设是发生这种情况是因为您 运行 在启用混淆器的情况下安装应用程序，混淆器可能正在更改方法名称，这将导致此异常。
我建议使用点击侦听器，因为使用 android:onClick
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Button button = findViewById(R.id.search_button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onMapSearch(v);
}
});
// implementation of an onclick listener using a lambda instead
button.setOnClickListener(v -> onMapSearch(v));
}
此外，您可以考虑删除 onMapSearch 中的视图参数，因为它不再被使用了
编辑
要修复 android.os.NetworkOnMainThreadException 您需要 运行 主线程之外的网络调用，请注意，不建议使用 AsyncTask，因为它已经被弃用很长时间了。
工人示例
public class AppExecutors {
private static final Object LOCK = new Object();
private static AppExecutors sInstance;
private static Executor processor;
private final Executor diskIO;
private final Executor networkIO;
private final Executor mainThread;
private AppExecutors(Executor diskIO, Executor networkIO, Executor mainThread){
this.diskIO = diskIO;
this.networkIO = networkIO;
this.mainThread = mainThread;
}
public static AppExecutors getInstance(){
if(sInstance == null){
synchronized (LOCK){
sInstance = new AppExecutors(Executors.newSingleThreadExecutor(),
Executors.newFixedThreadPool(3),
new MainThreadExecutor());
}
}
return sInstance;
}
public Executor diskIO() {
return diskIO;
}
public Executor networkIO() {
return networkIO;
}
public Executor getMainThread() {
return mainThread;
}
private static class MainThreadExecutor implements Executor {
private final Handler mainThreadHandler = new Handler(Looper.getMainLooper());
@Override
public void execute(@NotNull Runnable command) {
mainThreadHandler.post(command);
}
}
}
用法
AppExecutors.getInstance().networkIO().execute(() -> {
// Network call goes here
});