我有海岸线坐标(超过一百个坐标),我想将坐标放入数组中。之后计算我当前位置与所有坐标之间的距离(使用 for 循环)并将结果也放入数组中。所以我有两个数组
- 地理点数组
- 距离阵列
我想找到距离数组的最小值,但程序总是强制关闭。这是我的代码,只显示十个坐标:
public class Nav extends FragmentActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_nav);
List<GeoPoint> points = new ArrayList<GeoPoint>();
Double latitude1 = Double.parseDouble("-0.696928");
Double longitude1 = Double.parseDouble("119.843473");
GeoPoint latLong1 = new GeoPoint((int)(latitude1*1e6),(int)(longitude1*1e6));
Double latitude2 = Double.parseDouble("-0.699331");
Double longitude2 = Double.parseDouble("119.84416");
GeoPoint latLong2 = new GeoPoint((int)(latitude2*1e6),(int)(longitude2*1e6));
Double latitude3 = Double.parseDouble("-0.701048");
Double longitude3 = Double.parseDouble("119.843817");
GeoPoint latLong3 = new GeoPoint((int)(latitude3*1e6),(int)(longitude3*1e6));
Double latitude4 = Double.parseDouble("-0.702592");
Double longitude4 = Double.parseDouble("119.843817");
GeoPoint latLong4 = new GeoPoint((int)(latitude4*1e6),(int)(longitude4*1e6));
Double latitude5 = Double.parseDouble("-0.701563");
Double longitude5 = Double.parseDouble("119.84622");
GeoPoint latLong5 = new GeoPoint((int)(latitude5*1e6),(int)(longitude5*1e6));
Double latitude6 = Double.parseDouble("-0.702249");
Double longitude6 = Double.parseDouble("119.84725");
GeoPoint latLong6 = new GeoPoint((int)(latitude6*1e6),(int)(longitude6*1e6));
Double latitude7 = Double.parseDouble("-0.703451");
Double longitude7= Double.parseDouble("119.846907");
GeoPoint latLong7 = new GeoPoint((int)(latitude7*1e6),(int)(longitude7*1e6));
Double latitude8 = Double.parseDouble("-0.705167");
Double longitude8 = Double.parseDouble("119.847937");
GeoPoint latLong8 = new GeoPoint((int)(latitude8*1e6),(int)(longitude8*1e6));
Double latitude9 = Double.parseDouble("-0.70654");
Double longitude9 = Double.parseDouble("119.849653");
GeoPoint latLong9 = new GeoPoint((int)(latitude9*1e6),(int)(longitude9*1e6));
Double latitude10 = Double.parseDouble("10. -0.707914");
Double longitude10 = Double.parseDouble("119.85137");
GeoPoint latLong10 = new GeoPoint((int)(latitude10*1e6),(int)(longitude10*1e6));
points.add(latLong1);
points.add(latLong2);
points.add(latLong3);
points.add(latLong4);
points.add(latLong5);
points.add(latLong6);
points.add(latLong7);
points.add(latLong8);
points.add(latLong9);
points.add(latLong10);
// Get the location manager
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, true));
Double lat,lon;
lat = location.getLatitude ();
lon = location.getLongitude ();
Location locationA = new Location("USER");
locationA.setLatitude(lat);
locationA.setLongitude(lon);
ArrayList<Double> dist = new ArrayList<Double>();
for(int i=0; i<=points.size(); i++){
double distances = locationA.distanceTo(points(i));
dist.add(distances);
double minDist = Collections.min(dist);
Toast.makeText( getApplicationContext(),
"Your Distance to the beach is " + minDist,
Toast.LENGTH_LONG).show();
}
}
private Location points(int i) {
// TODO Auto-generated method stub
return null;
}
}
有人知道我的代码有什么问题吗?以及如何知道和显示 Goepoint 离我的位置很近?这是我的 LogCat
10-08 13:20:18.784: I/Process(632): 发送信号。PID:632 SIG:9 10-08 13:20:31.743: D/dalvikvm(675): GC_FOR_ALLOC 释放 254K,10% 释放 5364K/5959K,暂停 95ms,总共 99ms 10-08 13:20:31.993:I/Choreographer(675):跳过 59 帧!应用程序可能在其主线程上做了太多工作。 10-08 13:20:32.024:D/gralloc_goldfish(675):没有检测到 GPU 仿真的仿真器。 10-08 13:20:33.944:I/Choreographer(675):跳过 159 帧!应用程序可能在其主线程上做了太多工作。 10-08 13:20:34.084: D/AndroidRuntime(675): 关闭虚拟机 10-08 13:20:34.084: W/dalvikvm(675): threadid=1: 线程以未捕获的异常退出 (group=0x40a13300) 10-08 13:20:34.174:E/AndroidRuntime(675):致命异常:主要 10-08 13:20:34.174: E/AndroidRuntime(675): java.lang.RuntimeException: 无法启动活动 ComponentInfo{com.marker/com.marker.Nav}: java.lang.RuntimeException: 存根 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.app.ActivityThread.access$600(ActivityThread.java:130) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.os.Handler.dispatchMessage(Handler.java:99) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.os.Looper.loop(Looper.java:137) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.app.ActivityThread.main(ActivityThread.java:4745) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 java.lang.reflect.Method.invokeNative(Native Method) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 java.lang.reflect.Method.invoke(Method.java:511) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 10-08 13:20:34.174:E/AndroidRuntime(675):在 dalvik.system.NativeStart.main(本机方法) 10-08 13:20:34.174:E/AndroidRuntime(675):原因:java.lang.RuntimeException:存根 10-08 13:20:34.174: E/AndroidRuntime(675): at com.google.android.maps.GeoPoint.(Unknown Source) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 com.marker.Nav.onCreate(Nav.java:32) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.app.Activity.performCreate(Activity.java:5008) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 10-08 13:20:34.174: E/AndroidRuntime(675): 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) 10-08 13:20:34.174: E/AndroidRuntime(675): ... 11 更多