android之使用百度地图（1）

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent">
 6 
 7     <TextView
 8         android:layout_width="wrap_content"
 9         android:layout_height="wrap_content"
10         android:id="@+id/tv_positionTextView"/>
11 
12 </LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="acticitytest.exapmle.com.lbstest">
    <!-- 这个权限用于进行网络定位-->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <!--访问GPS定位-->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <!--访问WiFi网络信息，WiFi信息会用于网络定位-->
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <!--获取运行商信息，用于支持提供运营商的信息相关的接口-->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <!--获取WiFi权限，WiFi信息会使用这种网络定位-->
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
    <!--读取当前手机状态-->
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <!--写入拓展存储，向拓展卡写入数据-->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <!--访问网络，因为网络定位需要上网-->
    <uses-permission android:name="android.permission.INTERNET"/>
    <!--SD卡读取权限-->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
    <!--允许用户读取低级别的系统日志-->
    <uses-permission android:name="android.permission.WAKE_LOCK"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <meta-data
            android:name="com.baidu.lbsapi.API_KEY"
            android:value="SvxVofWKmGx9PaizUrIk3q4TSaxlUv4A"/>

        <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.location.f"
            android:enabled="true"
            android:process=":remote">
        </service>
    </application>

</manifest>

package acticitytest.exapmle.com.lbstest;

import android.Manifest;
import android.content.pm.PackageManager;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    public LocationClient mLocationClient;
    private TextView postionText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mLocationClient=new LocationClient(getApplicationContext());
        mLocationClient.registerLocationListener(new MyLocationListener());
        setContentView(R.layout.activity_main);
        postionText=(TextView)findViewById(R.id.tv_positionTextView);
        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();
        }
    }

    public void requestLocation(){
        initLocation();
        mLocationClient.start();//开始定位
    }
    /**用于更新位置信息*/
    private void initLocation(){
        LocationClientOption option=new LocationClientOption();
        option.setScanSpan(5000);//每五秒更新当前位置
        mLocationClient.setLocOption(option);
    }

    @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,"未知错误",Toast.LENGTH_SHORT).show();
                    finish();
                }
                break;
            default:
                break;
        }
    }

    public class MyLocationListener implements BDLocationListener{
        @Override
        public void onReceiveLocation(BDLocation bdLocation) {
            StringBuilder currentPostion =new StringBuilder();
            currentPostion.append("纬度：").append(bdLocation.getLatitude()).append("\n");
            currentPostion.append("经度：").append(bdLocation.getLongitude()).append("\n");
            currentPostion.append("定位方式：");
            if (bdLocation.getLocType()==BDLocation.TypeGpsLocation){
                currentPostion.append("GPS");
            }else if(bdLocation.getLocType()==BDLocation.TypeNetWorkLocation){
                currentPostion.append("网络");
            }else{
                currentPostion.append("未识别");
            }
            postionText.setText(currentPostion);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mLocationClient.stop();//不断更新时一定要注意，在活动销毁时关闭，否则会一直耗电
    }
}