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);}});}}