android------关于API 23的权限问题

在代码：

locationManager.requestLocationUpdates(provider, 60000, 50, getListener());

中报以下的错误：

Call requires permission which may be rejected by user: code should explicitly check to see if permission is available (with `checkPermission`) or explicitly handle a potential `SecurityException`

在AndroidManifest.xml中加入了以下的权限还是有错：

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /><uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

百度了下，大意是：

调用需要的权限可能被用户拒绝:代码应该显式地检查权限是否可用(用checkPermission)或显式地处理一个潜在的“SecurityException”

这是在使用 Android marshmallow（API 23）时出现的

参考以下代码解决：

public class MainActivity extends AppCompatActivity {    /* GPS Constant Permission */    private static final int MY_PERMISSION_ACCESS_COARSE_LOCATION = 11;    private static final int MY_PERMISSION_ACCESS_FINE_LOCATION = 12;    /* Position */    private static final int MINIMUM_TIME = 10000;  // 10s    private static final int MINIMUM_DISTANCE = 50; // 50m    /* GPS */    private String mProviderName;    private LocationManager mLocationManager;    private LocationListener mLocationListener;    @Override    protected void onCreate(Bundle savedInstanceState) {        ...        mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);        // Get the best provider between gps, network and passive        Criteria criteria = new Criteria();        mProviderName = mLocationManager.getBestProvider(criteria, true);        // API 23: we have to check if ACCESS_FINE_LOCATION and/or ACCESS_COARSE_LOCATION permission are granted        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED                || ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {            // No one provider activated: prompt GPS            if (mProviderName == null || mProviderName.equals("")) {                startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));            }            // At least one provider activated. Get the coordinates            switch (mProviderName) {                case "passive":                    mLocationManager.requestLocationUpdates(mProviderName, MINIMUM_TIME, MINIMUM_DISTANCE, this);                    Location location = mLocationManager.getLastKnownLocation(mProviderName);                    break;                case "network":                    break;                case "gps":                    break;            }        // One or both permissions are denied.        } else {            // The ACCESS_COARSE_LOCATION is denied, then I request it and manage the result in            // onRequestPermissionsResult() using the constant MY_PERMISSION_ACCESS_FINE_LOCATION            if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED ) {                ActivityCompat.requestPermissions(this,                        new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},                        MY_PERMISSION_ACCESS_COARSE_LOCATION);            }            // The ACCESS_FINE_LOCATION is denied, then I request it and manage the result in            // onRequestPermissionsResult() using the constant MY_PERMISSION_ACCESS_FINE_LOCATION            if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED ) {                ActivityCompat.requestPermissions(this,                        new String[] { Manifest.permission.ACCESS_FINE_LOCATION },                        MY_PERMISSION_ACCESS_FINE_LOCATION);            }        }    }    @Override    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {        switch (requestCode) {            case MY_PERMISSION_ACCESS_COARSE_LOCATION: {                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {                    // permission was granted                } else {                    // permission denied                }                break;            case MY_PERMISSION_ACCESS_FINE_LOCATION: {                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {                    // permission was granted                } else {                    // permission denied                }                break;            }        }    }}