最近做一個關於 手機定位的功能，自己記錄一下，一來加深記憶，二來希望能給大家一點思路，程式碼親測有效。

直接貼程式碼：

清單檔案要加的許可權，程式碼中還有動態許可權申請

<!--定位許可權-->
<uses-permission android:name="android.permission.ACCESS_FIND_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name=
 
"android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

佈局不在給出只有一個button和一個textView

public class MainActivity extends AppCompatActivity {
    private Button getLocation;
private TextView myLocation;
private double latitudeGps
 
;
private double longitudeGps;
private double latitudeNet;
private double longitudeNet;
@Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
setListener();
}
    private void setListener() {
        getLocation
 
.setOnClickListener(new View.OnClickListener() {
            @Override
public void onClick(View view) {
                myLocation.setText("您現在的位置經度是:"+longitudeGps+"維度是："+latitudeGps);
}
        });
}
    private void initView() {
        getLocation = (Button) findViewById(R.id.getLocation_btn);
myLocation = (TextView) findViewById(R.id.myLocation_tv);
getMyLocation();
}

    public void getMyLocation() {
        //要加動態許可權,清單檔案也要加許可權
        //被拒絕情況
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_DENIED) {
            //申請
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION}, 0);
initLocation();
} else {
            initLocation();
}
    }

    //載入本地位置
private void initLocation() {
        LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(false);
criteria.setPowerRequirement(Criteria.POWER_LOW);
//
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
//    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
return;
}
        Location locationGps = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
Location locationNet = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (locationGps!=null){
            latitudeGps = locationGps.getLatitude();
longitudeGps = locationGps.getLongitude();
choseLocationType();
}else if (locationNet!=null){
            latitudeNet = locationNet.getLatitude();
longitudeNet = locationGps.getLongitude();
choseLocationType();
}else {
            Toast.makeText(MainActivity.this,"獲取位置失敗，請檢查網路",Toast.LENGTH_SHORT).show();
}
        LocationListener locationListener = new LocationListener() {
            @Override
public void onLocationChanged(Location location) {}
            @Override
public void onStatusChanged(String s, int i, Bundle bundle) {}

            @Override
public void onProviderEnabled(String s) {}

            @Override
public void onProviderDisabled(String s) {}
        };
//更新（間隔自己定義）
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,10,1000,locationListener);
}

    private void choseLocationType() {
        if (latitudeNet>0&&latitudeGps<=0){
            latitudeGps=latitudeNet;
}else if (longitudeNet>0&&longitudeGps<=0){
            longitudeGps=longitudeNet;
}
    }
}

請注意以下幾點：

一：第一次開啟app可能獲取到為0.0，關閉app再代開就可以，以後都正常，因為這裡用了getLastKnowLocation 獲得最後一次的

二：本文是獲取經緯度，如果您還需要獲取具體位置，可以嘗試一下Goolge的location包提供的Geocoder類，他可以把經緯度轉成具體位置還可以把具體位置轉為經緯度，但鑑於Google服務的穩定性，您可以考慮一下藉助百度的服務來獲取具體位置資訊。

三：關於Criteria類，這裡引用一位大神的翻譯我就直接貼過來了

在使用android lcoation的時候，可能不希望自己去硬性的選擇是GPS服務還是NETWORK服務，可能是我們考慮的因素有很多，自己很難決定，Android SDK提供了一個類Criteria，直譯為標準。

在使用android lcoation的時候，可能不希望自己去硬性的

public String getBestProvider (Criteria criteria, boolean enabledOnly)

Since: API Level 1

Returns the name of the provider that best meets the given criteria. Only providers that are permitted to be accessed by the calling activity will be returned. If several providers meet the criteria, the one with the best accuracy is returned. If no provider meets the criteria, the criteria are loosened in the following sequence:

//翻譯：返回滿足給定的criteria(標準)的最佳provider，（前面一篇文章提到過兩種重要provider的區別）。只有當provider許可權允許的時候才會返回，如果幾個provider均滿足criteria設定的標準，最貼近標準的provider將會被返回。如果沒有provider滿足，標準將按照下面的序列放寬鬆。

    power requirement

    accuracy

    bearing

    speed

    altitude