我有海岸线坐标（超过一百个坐标），我想把坐标放到数组中。 之后计算我当前位置与所有坐标之间的距离（使用for循环）并将结果放入数组中。 所以我有两个数组
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？ 如何知道和显示Goepoint与我的位置有什么关系？ 这是我的LogCat
10-08 13:20:18.784: I/Process(632): Sending signal. PID: 632 SIG: 9
10-08 13:20:31.743: D/dalvikvm(675): GC_FOR_ALLOC freed 254K, 10% free 5364K/5959K, paused 95ms, total 99ms
10-08 13:20:31.993: I/Choreographer(675): Skipped 59 frames! The application may be doing too much work on its main thread.
10-08 13:20:32.024: D/gralloc_goldfish(675): Emulator without GPU emulation detected.
10-08 13:20:33.944: I/Choreographer(675): Skipped 159 frames! The application may be doing too much work on its main thread.
10-08 13:20:34.084: D/AndroidRuntime(675): Shutting down VM
10-08 13:20:34.084: W/dalvikvm(675): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
10-08 13:20:34.174: E/AndroidRuntime(675): FATAL EXCEPTION: main
10-08 13:20:34.174: E/AndroidRuntime(675): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.marker/com.marker.Nav}: java.lang.RuntimeException: stub
10-08 13:20:34.174: E/AndroidRuntime(675): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
10-08 13:20:34.174: E/AndroidRuntime(675): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-08 13:20:34.174: E/AndroidRuntime(675): at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-08 13:20:34.174: E/AndroidRuntime(675): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-08 13:20:34.174: E/AndroidRuntime(675): at android.os.Handler.dispatchMessage(Handler.java:99)
10-08 13:20:34.174: E/AndroidRuntime(675): at android.os.Looper.loop(Looper.java:137)
10-08 13:20:34.174: E/AndroidRuntime(675): at android.app.ActivityThread.main(ActivityThread.java:4745)
10-08 13:20:34.174: E/AndroidRuntime(675): at java.lang.reflect.Method.invokeNative(Native Method)
10-08 13:20:34.174: E/AndroidRuntime(675): at java.lang.reflect.Method.invoke(Method.java:511)
10-08 13:20:34.174: E/AndroidRuntime(675): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-08 13:20:34.174: E/AndroidRuntime(675): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-08 13:20:34.174: E/AndroidRuntime(675): at dalvik.system.NativeStart.main(Native Method)
10-08 13:20:34.174: E/AndroidRuntime(675): Caused by: java.lang.RuntimeException: stub
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): at com.marker.Nav.onCreate(Nav.java:32)
10-08 13:20:34.174: E/AndroidRuntime(675): at android.app.Activity.performCreate(Activity.java:5008)
10-08 13:20:34.174: E/AndroidRuntime(675): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
10-08 13:20:34.174: E/AndroidRuntime(675): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
10-08 13:20:34.174: E/AndroidRuntime(675): ... 11 more
答案 0 :(得分：2)
如果没有看到您的错误消息，我肯定能发现问题。您正在遍历列表的末尾。在循环条件中使用<代替<=。
此外，这可能不是错误，但为什么你在循环中调用Collections.min()？在填充所有距离后，您不想这样做吗？我误解了你的目标吗？
答案 1 :(得分：2)
LocationManager locationManager =（LocationManager）getSystemService（LOCATION_SERVICE）;
使用getApplicationContext（）。getSystemService（LOCATION_SERVICE）;
或Context.getSystemService（LOCATION_SERVICE）;
答案 2 :(得分：1)
听起来好像是ArrayIndexOutOfBoundsException Docs
for(int i=0; i<=points.size(); i++){ // Check i<= here it should be < only
所以尝试将其改为
for(int i=0; i<points.size(); i++){