安卓定位开发实例

接上篇 ，没有看过上篇博客的小伙伴，可以进我文章中找到

首先我们需要修改AndroidManifest.xml文件中的配置信息

如下所示

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.administrator.applicationcode">
<!--位置服务-->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
    <uses-permission android:name="android.permission.WAKE_LOCK"/>


    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/Theme.AppCompat.NoActionBar">
        <meta-data
            android:name="com.baidu.lbsapi.API_KEY"
            android:value="之前的API key" />

        <activity android:name=".MainActivity"
            
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service android:name="com.baidu.loction.f" android:enabled="true"
            android:process=":remote"
            >

        </service>

    </application>


</manifest>

由于才用Toast弹窗来查看定位情况，所以layout就可以随意写了，大家可以根据自己情况来决定

下面看一下MainActivity.java怎么写

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    //位置服务
    public LocationClient mLocationClient;

@Override
    protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);

        //位置服务代码
        mLocationClient=new LocationClient(getApplicationContext());
mLocationClient.registerLocationListener(new MyLocationListener());
//权限组
        List<String> permissionList=new ArrayList<>();
if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION)!=PackageManager.PERMISSION_GRANTED){
            permissionList.add(Manifest.permission.ACCESS_FINE_LOCATION);
        }
if (ContextCompat.checkSelfPermission(MainActivity.this,Manifest.permission.READ_PHONE_STATE)!=PackageManager.PERMISSION_GRANTED){
            permissionList.add(Manifest.permission.READ_PHONE_STATE);
        }
if (ContextCompat.checkSelfPermission(MainActivity.this,Manifest.permission.WRITE_EXTERNAL_STORAGE)!=PackageManager.PERMISSION_GRANTED){
            permissionList.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
        }
if (!permissionList.isEmpty()){
            String[] permissions=permissionList.toArray(new String[permissionList.size()]);
            ActivityCompat.requestPermissions(MainActivity.this,permissions,1);
        }else {
            requestLocation();
        }

        setContentView(R.layout.activity_main);

    }

private void requestLocation(){
        initLocation();
mLocationClient.start();
    }

@Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode){
case 1:
if(grantResults.length>0){
for (int result:grantResults){
if (result!= PackageManager.PERMISSION_GRANTED){
                            Toast.makeText(this,"必须同意所有权限才能使用本程序",Toast.LENGTH_SHORT).show();
                            finish();
return;
                        }
                    }
                    requestLocation();
                }else{
                    Toast.makeText(this,"发生未知错误",Toast.LENGTH_SHORT).show();
                    finish();
                }
break;
default:
break;
        }
    }

//经纬转换
    private void initLocation(){
        LocationClientOption option=new LocationClientOption();
        option.setScanSpan(5000);
        option.setIsNeedAddress(true);
mLocationClient.setLocOption(option);
    }

public class MyLocationListener implements BDLocationListener{
@Override
        public void onReceiveLocation(BDLocation location) {
            StringBuilder currentPosition =new StringBuilder();


            currentPosition.append("纬度：").append(location.getLatitude()).append("\n");
            currentPosition.append("经度：").append(location.getLongitude()).append("\n");
            currentPosition.append("国家：").append(location.getCountry()).append("\n");
            currentPosition.append("省份：").append(location.getProvince()).append("\n");
            currentPosition.append("市：").append(location.getCity()).append("\n");
            currentPosition.append("区：").append(location.getDistrict()).append("\n");
            currentPosition.append("街道：").append(location.getStreet()).append("\n");
            currentPosition.append("定位方式：");
if (location.getLocType()==BDLocation.TypeGpsLocation){
                currentPosition.append("GPS");
            }else if (location.getLocType()==BDLocation.TypeNetWorkLocation){
                currentPosition.append("网络");
            }
            Toast.makeText(getApplicationContext(),currentPosition,Toast.LENGTH_SHORT).show();
        }
    }
}

即可获得定位信息。如果位置信息返回的是null，可能是initLocation（）中的setIsNeedAddress方法的问题。