ANDROID_MARS学习笔记_S03_004_getAllProviders、LOCATIONLISTENER、getBestProvider

一、代码

1.xml
(1)activity_main.xml

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

2.java
(1)MainActivity.java

package com.location2;

import java.util.Iterator;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.location.Criteria;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {
    private Button scanProvider = null;
    private Button bestProvider = null;
    private LocationManager locationManager = null;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        scanProvider = (Button)findViewById(R.id.ScanProvidersButton);
        bestProvider = (Button)findViewById(R.id.bestProviderButton);
        locationManager = (LocationManager) MainActivity.this.getSystemService(Context.LOCATION_SERVICE);
        
        scanProvider.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                List<String> providers = locationManager.getAllProviders();
                System.out.println("providers----->");
                for(Iterator<String> it = providers.iterator() ; it.hasNext() ; ) {
                    System.out.println(it.next());
                }
            }
        });
        
        bestProvider.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Criteria criteria = new Criteria();
                criteria.setAccuracy(Criteria.ACCURACY_FINE);
                criteria.setPowerRequirement(Criteria.POWER_LOW);
                criteria.setAltitudeRequired(false);
                criteria.setSpeedRequired(false);
                criteria.setCostAllowed(false);
                //获得最好的provider，第二个参数表示是否考虑provider可用
                String provider = locationManager.getBestProvider(criteria, false);
                System.out.println("best provider ---> "+provider);
            }
        });
    }
}

package com.location2;
import java.util.Iterator;import java.util.List;
import android.app.Activity;import android.content.Context;import android.location.Criteria;import android.location.LocationManager;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;
public class MainActivity extends Activity {private Button scanProvider = null;private Button bestProvider = null;private LocationManager locationManager = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);        scanProvider = (Button)findViewById(R.id.ScanProvidersButton);        bestProvider = (Button)findViewById(R.id.bestProviderButton);        locationManager = (LocationManager) MainActivity.this.getSystemService(Context.LOCATION_SERVICE);                scanProvider.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {List<String> providers = locationManager.getAllProviders();System.out.println("providers----->");for(Iterator<String> it = providers.iterator() ; it.hasNext() ; ) {System.out.println(it.next());}}});                bestProvider.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Criteria criteria = new Criteria();criteria.setAccuracy(Criteria.ACCURACY_FINE);criteria.setPowerRequirement(Criteria.POWER_LOW);criteria.setAltitudeRequired(false);criteria.setSpeedRequired(false);criteria.setCostAllowed(false);//获得最好的provider，第二个参数表示是否考虑provider可用String provider = locationManager.getBestProvider(criteria, false);System.out.println("best provider ---> "+provider);}});}}