package com.example.mars_3300_location02;

import java.net.ContentHandler;

import java.util.List;

import android.support.v7.app.ActionBarActivity;

import android.support.v7.app.ActionBar;

import android.support.v4.app.Fragment;

import android.content.Context;

import android.location.Criteria;

import android.location.LocationListener;

import android.location.LocationManager;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.Button;

import android.os.Build;

public class MainActivity extends ActionBarActivity {

    private Button locationButton;

    private Button bestProviderButton;

    private LocationManager locationManager;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        locationButton = (Button) findViewById(R.id.locationButtonId);

        bestProviderButton = (Button) findViewById(R.id.bestProviderButtonId);

        locationButton.setOnClickListener(new ProvidersButtonListener());

        bestProviderButton.setOnClickListener(new BestProviderButtonListener());

        locationManager = (LocationManager) MainActivity.this

                .getSystemService(Context.LOCATION_SERVICE);

        if (savedInstanceState == null) {

            getSupportFragmentManager().beginTransaction()

                    .add(R.id.container, new PlaceholderFragment()).commit();

        }

    }

    private class ProvidersButtonListener implements OnClickListener {

        @Override

        public void onClick(View v) {

            // 获取所有支持的定位类型

            List<String> providers = locationManager.getAllProviders();

            for (String string : providers) {

                System.out.println(string);

            }

        }

    }

    private class BestProviderButtonListener implements OnClickListener {

        @Override

        public void onClick(View v) {

            // 通过条件搜索最合适的Provider

            // 生成一个Criteria对象

            Criteria criteria = new Criteria();

            // 设置查询条件

            criteria.setAccuracy(Criteria.ACCURACY_FINE);

            criteria.setPowerRequirement(Criteria.ACCURACY_LOW);

            criteria.setAltitudeRequired(false);

            criteria.setSpeedRequired(false);

            criteria.setCostAllowed(false);

            String provider = locationManager.getBestProvider(criteria, false);

            System.out.println("best provider --->" + provider);

        }

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();

        if (id == R.id.action_settings) {

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

    /**

     * A placeholder fragment containing a simple view.

     */

    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {

        }

        @Override

        public View onCreateView(LayoutInflater inflater, ViewGroup container,

                Bundle savedInstanceState) {

            View rootView = inflater.inflate(R.layout.fragment_main, container,

                    false);

            return rootView;

        }

    }

}