在我的应用程序中，我有一个活动，您可以根据您在edittext中键入的地址来确定位置，或者只需移动它在onMapReady函数中显示的引脚。
我的活动布局包含显示地图的片段，返回上一活动中针脚位置信息的按钮以及输入地址和按下按钮后的编辑文本，地图上的前一个图钉是被删除，并出现一个新的与你输入的位置（如果存在）。
- 这是我的onMapReady函数，在搜索按钮中有一个监听器，并在拖动它之后初始化引脚和引脚位置的函数：
@Override
public void onMapReady(final GoogleMap map) {
map.setMyLocationEnabled(true);
map.moveCamera(CameraUpdateFactory.newLatLngZoom(position, 13));
CameraUpdate zoom = CameraUpdateFactory.zoomTo(15);
map.animateCamera(zoom);
map.addMarker(new MarkerOptions()
.title("Shop")
.snippet("Is this the right location?")
.position(position))
.setDraggable(true);
// map.setInfoWindowAdapter(new PopupAdapter(getLayoutInflater()));
map.setOnInfoWindowClickListener(this);
map.setOnMarkerDragListener(this);
ImageButton search = (ImageButton) findViewById(R.id.search);
final EditText searchaddress = (EditText) findViewById(R.id.locationsearch);
final int[] numAttempts = {0};
search.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//FIND LOCATION BY ADDRESS
Geocoder geoCoder = new Geocoder(MapsActivity.this.getApplicationContext(), Locale.getDefault());
// try {
if (searchaddress.getText().toString() != null && !searchaddress.getText().toString().isEmpty()) {
try {
List<Address> geoResults = geoCoder.getFromLocationName(searchaddress.getText().toString(), 1);
if (geoResults != null) {
// do {
// geoResults = geoCoder.getFromLocationName(searchaddress.getText().toString(), 1);
// numAttempts[0] = numAttempts[0] + 1;
// }
// while (geoResults.size() == 0 || numAttempts[0] == 5);
if (geoResults.size() > 0) {
Address addr = geoResults.get(0);
if (!addr.toString().isEmpty()) {
double latitude = addr.getLatitude();
double longitude = addr.getLongitude();
position = new LatLng(latitude, longitude);
map.moveCamera(CameraUpdateFactory.newLatLngZoom(position, 13));
CameraUpdate zoom = CameraUpdateFactory.zoomTo(15);
map.animateCamera(zoom);
//Marker marker = null;
map.clear();
//marker.setPosition(position);
map.addMarker(new MarkerOptions()
.title("Shop")
.snippet("Is this the right location?")
.position(position))
.setDraggable(true);
// map.setInfoWindowAdapter(new PopupAdapter(getLayoutInflater()));
map.setOnInfoWindowClickListener(MapsActivity.this);
map.setOnMarkerDragListener(MapsActivity.this);
} else {
Toast.makeText(getApplicationContext(), "Addr is empty!", Toast.LENGTH_LONG).show();
}
} else {
Toast.makeText(getApplicationContext(), "Wrong address. Please try another one! :" + geoResults.size() + "!", Toast.LENGTH_LONG).show();
}
}
else {
Toast.makeText(getApplicationContext(), "Null address!", Toast.LENGTH_LONG).show();
}
}catch(Exception e) {
Log.e("GEOCODER", e.getMessage(), e);
}
} else {
Toast.makeText(getApplicationContext(), "Please enter an address!", Toast.LENGTH_LONG).show();
}
}
});
}
@Override
public void onInfoWindowClick(Marker marker) {
//Toast.makeText(this, marker.getTitle(), Toast.LENGTH_LONG).show();
}
@Override
public void onMarkerDragStart(Marker marker) {
LatLng position0 = marker.getPosition();
Log.d(getClass().getSimpleName(), String.format("Drag from %f:%f",
position0.latitude,
position0.longitude));
}
@Override
public void onMarkerDrag(Marker marker) {
LatLng position0 = marker.getPosition();
Log.d(getClass().getSimpleName(),
String.format("Dragging to %f:%f", position0.latitude,
position0.longitude));
}
@Override
public void onMarkerDragEnd(Marker marker) {
position = marker.getPosition();
Log.d(getClass().getSimpleName(), String.format("Dragged to %f:%f",
position.latitude,
position.longitude));
}
直到几天前，我可以从用户在编辑文本中输入的位置显示一个引脚，其中包含上述代码。现在，由于未知原因，我不能再用完全相同的代码执行此操作。
始终显示toast关于'错误地址'。请尝试另一个！'即使我在编辑文本中输入的地址存在，geoResults的大小始终为0，并且在Logcat中不会发生异常
- 当我从评论中删除do-while部分时，logcat中的例外情况如下：
02-24 13:13:53.251 28017-28024/guide_me_for_all.guide_me_for_all I/dalvikvm﹕ Jit: resizing JitTable from 4096 to 8192
02-24 13:14:57.465 28017-28020/guide_me_for_all.guide_me_for_all I/dalvikvm﹕ threadid=3: reacting to signal 3
02-24 13:14:57.765 28017-28020/guide_me_for_all.guide_me_for_all I/dalvikvm﹕ Wrote stack traces to '/data/anr/traces.txt'
02-24 13:15:02.701 28017-28017/guide_me_for_all.guide_me_for_all A/libc﹕ Fatal signal 6 (SIGABRT) at 0x000008d2 (code=0), thread 28017 (uide_me_for_all)
02-24 13:15:06.605 28881-28881/guide_me_for_all.guide_me_for_all D/ActivityThread﹕ handleBindApplication:guide_me_for_all.guide_me_for_all
02-24 13:15:06.605 28881-28881/guide_me_for_all.guide_me_for_all D/ActivityThread﹕ setTargetHeapUtilization:0.75
02-24 13:15:06.605 28881-28881/guide_me_for_all.guide_me_for_all D/ActivityThread﹕ setTargetHeapMinFree:524288
02-24 13:15:07.296 28881-28881/guide_me_for_all.guide_me_for_all I/dalvikvm﹕ Could not find method android.view.ViewGroup.onNestedScrollAccepted, referenced from method android.support.v7.internal.widget.ActionBarOverlayLayout.onNestedScrollAccepted
02-24 13:15:07.296 28881-28881/guide_me_for_all.guide_me_for_all W/dalvikvm﹕ VFY: unable to resolve virtual method 11956: Landroid/view/ViewGroup;.onNestedScrollAccepted (Landroid/view/View;Landroid/view/View;I)V
02-24 13:15:07.296 28881-28881/guide_me_for_all.guide_me_for_all D/dalvikvm﹕ VFY: replacing opcode 0x6f at 0x0000
02-24 13:15:07.296 28881-28881/guide_me_for_all.guide_me_for_all I/dalvikvm﹕ Could not find method android.view.ViewGroup.onStopNestedScroll, referenced from method android.support.v7.internal.widget.ActionBarOverlayLayout.onStopNestedScroll
02-24 13:15:07.296 28881-28881/guide_me_for_all.guide_me_for_all W/dalvikvm﹕ VFY: unable to resolve virtual method 11962: Landroid/view/ViewGroup;.onStopNestedScroll (Landroid/view/View;)V
02-24 13:15:07.296 28881-28881/guide_me_for_all.guide_me_for_all D/dalvikvm﹕ VFY: replacing opcode 0x6f at 0x0000
02-24 13:15:07.306 28881-28881/guide_me_for_all.guide_me_for_all I/dalvikvm﹕ Could not find method android.support.v7.internal.widget.ActionBarOverlayLayout.stopNestedScroll, referenced from method android.support.v7.internal.widget.ActionBarOverlayLayout.setHideOnContentScrollEnabled
02-24 13:15:07.306 28881-28881/guide_me_for_all.guide_me_for_all W/dalvikvm﹕ VFY: unable to resolve virtual method 9598: Landroid/support/v7/internal/widget/ActionBarOverlayLayout;.stopNestedScroll ()V
02-24 13:15:07.306 28881-28881/guide_me_for_all.guide_me_for_all D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x000e
02-24 13:15:07.316 28881-28881/guide_me_for_all.guide_me_for_all I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.internal.widget.TintTypedArray.getChangingConfigurations
02-24 13:15:07.316 28881-28881/guide_me_for_all.guide_me_for_all W/dalvikvm﹕ VFY: unable to resolve virtual method 570: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
02-24 13:15:07.316 28881-28881/guide_me_for_all.guide_me_for_all D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
02-24 13:15:07.326 28881-28881/guide_me_for_all.guide_me_for_all I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.internal.widget.TintTypedArray.getType
02-24 13:15:07.326 28881-28881/guide_me_for_all.guide_me_for_all W/dalvikvm﹕ VFY: unable to resolve virtual method 592: Landroid/content/res/TypedArray;.getType (I)I
02-24 13:15:07.326 28881-28881/guide_me_for_all.guide_me_for_all D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
02-24 13:15:07.536 28881-28881/guide_me_for_all.guide_me_for_all E/Spinner﹕ setPopupBackgroundDrawable: incompatible spinner mode; ignoring...
02-24 13:15:07.546 28881-28881/guide_me_for_all.guide_me_for_all E/Spinner﹕ setPopupBackgroundDrawable: incompatible spinner mode; ignoring...
02-24 13:15:07.556 28881-28881/guide_me_for_all.guide_me_for_all E/Spinner﹕ setPopupBackgroundDrawable: incompatible spinner mode; ignoring...
02-24 13:15:08.147 28881-28881/guide_me_for_all.guide_me_for_all E/Spinner﹕ setPopupBackgroundDrawable: incompatible spinner mode; ignoring...
02-24 13:15:08.147 28881-28881/guide_me_for_all.guide_me_for_all E/Spinner﹕ setPopupBackgroundDrawable: incompatible spinner mode; ignoring...
02-24 13:15:08.147 28881-28881/guide_me_for_all.guide_me_for_all E/Spinner﹕ setPopupBackgroundDrawable: incompatible spinner mode; ignoring...
02-24 13:15:08.157 28881-28881/guide_me_for_all.guide_me_for_all E/Spinner﹕ setPopupBackgroundDrawable: incompatible spinner mode; ignoring...
02-24 13:15:08.167 28881-28881/guide_me_for_all.guide_me_for_all E/Spinner﹕ setPopupBackgroundDrawable: incompatible spinner mode; ignoring...
02-24 13:15:08.167 28881-28881/guide_me_for_all.guide_me_for_all E/Spinner﹕ setPopupBackgroundDrawable: incompatible spinner mode; ignoring...
02-24 13:15:08.577 28881-28881/guide_me_for_all.guide_me_for_all D/libEGL﹕ loaded /system/lib/egl/libEGL_mali.so
02-24 13:15:08.587 28881-28881/guide_me_for_all.guide_me_for_all D/libEGL﹕ loaded /system/lib/egl/libGLESv1_CM_mali.so
02-24 13:15:08.597 28881-28881/guide_me_for_all.guide_me_for_all D/libEGL﹕ loaded /system/lib/egl/libGLESv2_mali.so
02-24 13:15:08.627 28881-28881/guide_me_for_all.guide_me_for_all D/OpenGLRenderer﹕ Enabling debug mode 0
02-24 13:15:08.647 28881-28881/guide_me_for_all.guide_me_for_all I/Choreographer﹕ Skipped 59 frames! The application may be doing too much work on its main thread.
02-24 13:15:09.598 28881-28881/guide_me_for_all.guide_me_for_all I/Timeline﹕ Timeline: Activity_idle id: android.os.BinderProxy@41f5b4e8 time:26642276
在这一行：
12386-12386 / guide_me_for_all.guide_me_for_all A / libc：致命信号6 （SIGABRT）位于0x000008d2（代码= 0），线程12386（uide_me_for_all），
我不知道括号中的内容是什么，但我的包名是 g uide_me_for_all而不是uide_me_for_all。 （如果它与此有关）
如果有人能帮助我找到上述所有内容的含义，我将非常感激。
更正上述代码后更新： 用于将类从类返回到上一个活动的代码（UNSOLVED - 始终获取NULL值）：
在课堂上：
@Override
protected void onPostExecute(LatLng result) {
Log.i("GEOCODE", result.toString());
Intent i = new Intent(this.mainContxt , MapsActivity.class );
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.putExtra( "latlng" , result );
this.mainContxt.startActivity(i);
super.onPostExecute(result);
}
在MapsActivity的onCreate中，我有：
if (getIntent() != null) {
Intent intent = getIntent();null){
position_from_address = intent.getStringExtra("latlng");
}
之后在我的活动的搜索按钮的onClickListener中，我得到了这样的位置：
if (position_from_address != null){
String[] latlong = position_from_address.split(",");
double latitude = Double.parseDouble(latlong[0]);
double longitude = Double.parseDouble(latlong[1]);
position = new LatLng(latitude, longitude);
答案 0 :(得分：1)
问题可能是查找不是在后台线程中完成，请尝试复制粘贴我的答案中的代码：Google Geocoder service is unavaliable (Coordinates to address)
然后运行新的GetAddressPositionTask（）。执行（＆＃34; someAddress＆＃34;），看看会发生什么。
将上下文传递给AsyncTask：
添加构造函数：
public class GetAddressPositionTask extends
AsyncTask<String, Integer, LatLng> {
private Context context;
public GetAddressPositionTask(Context context) {
this.context = context;
}
// .. rest of the code here
}
用法：
GetAddressPositionTask(context).execute("someAddress")
context如果从片段调用，则为getApplicationContext()或getActivity().getApplicationContext()。
关于nullpointer：
不是100％清楚你在哪里获得nullpointer，但你应该能够这样做：
// in onPostExecute
i.putParcelable("latlng", result);
并在MapsActivity
LatLng position = (getIntent() != null) ? getParcelable("latlng") : null;
另一个值得关注的地方是this.mainContxt。只需改为YourActivity.this或getApplicationContext()。如果您在片段中，则执行Context context = getActivity()并确保它不为空。