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;
            }

        }
    }
}