Android开发学习03：定位获取当前地点的信息

Posted 2021-03-13 Shelinton

界面布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <Button
        android:id="@+id/addfence"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/startlocation" />

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/textView1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="2.89"
            android:scrollbars="vertical"
            android:text=" "
            android:textColor="#ffffffff" />
    </ScrollView>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/textView2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="2.89"
            android:scrollbars="vertical"
            android:text=" "
            android:textColor="#ffffffff" />
    </ScrollView>
</LinearLayout>

一、获取定位服务的实例：

//OnStart
//定位服务启动后，回调获取相关定位结果/诊断信息
locationService = ((LocationService)getApplication()).LocationService();
//Intent from MainActivity to this: type=0
//Intent from LocationOption to this: type=1
//Activities 间传参获取信息
int type = getIntent().getIntExtra("from", 0);
        if (type == 0) {//设置默认配置进行定位操作
            locationService.setLocationOption(locationService.getDefaultLocationClientOption());
        } else if (type == 1) {//直接启动服务
            locationService.start();
        }

二、设置注册监听：

locationService.registerListener(mListener);
//mListener中包含对定位信息与诊断信息回调的重载
//OnReceiveLocation()、OnDiagnoticMessage()

三、加载回调信息到用户界面的TextView中：

if (LocationResult != null) {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        LocationResult.post(new Runnable() {
                            @Override
                            public void run() {
                                if (tag == Utils.RECEIVE_TAG) {
                                    LocationResult.setText(str);
                                } else if (tag == Utils.DIAGNOSTIC_TAG) {
                                    LocationDiagnostic.setText(str);
                                }
                            }
                        });
                    }
                }).start();
            }

四、重载方法

@Override
        public void onReceiveLocation(BDLocation location) {

            // TODO Auto-generated method stub
            if (null != location && location.getLocType() != BDLocation.TypeServerError) {
                int tag = Utils.RECEIVE_TAG;
                StringBuffer sb = new StringBuffer(256);
                sb.append("time : ");
                /**
                 * 时间也可以使用systemClock.elapsedRealtime()方法 获取的是自从开机以来，每次回调的时间；
                 * location.getTime() 是指服务端出本次结果的时间，如果位置不发生变化，则时间不变
                 */
                //此处把信息加入到stringbuffer,再LogMessage
                logMsg(sb.toString(), tag);
            }
        }

        @Override
        public void onConnectHotSpotMessage(String s, int i) {
            super.onConnectHotSpotMessage(s, i);
        }
        @Override
        public void onLocDiagnosticMessage(int locType, int diagnosticType, String diagnosticMessage) {
            super.onLocDiagnosticMessage(locType, diagnosticType, diagnosticMessage);
            int tag = Utils.DIAGNOSTIC_TAG;
            StringBuffer sb = new StringBuffer(256);
            //此处把信息加入到stringbuffer,再LogMessage            
            logMsg(sb.toString(), tag);
        }

效果：