Android实现百度离线地图+gps定位
Posted Tobey_r1
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android实现百度离线地图+gps定位
关于
这段时间，因为公司项目需求，要在内网下实现地图展示及个人定位上报功能，一开始接到这个需求比较懵逼也以为实现起来很简单，结果…我以为的离线地图和实际的百度提供的离线地图功能相差甚远。一开始是想着将离线地图通过后台copy至接口或者资源复制，但是因为种种原因离线地图没显示出来，现在想来应该是地图加载页面写的有问题或者就是缓存问题，这个等有时间研究下吧，项目太着急，只能先这样了。然后离线地图的下载则是直接copy的demo里面的离线地图下载，定位则是通过gps，至于基站没有考虑的原因之一是公司的测试手机么得手机卡。
效果图
 图1 离线地图展示
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 图2 GPS定位
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第一步，添加百度地图jar包及引用
考虑到篇幅原因，我就直接把我之前百度地图使用基本配置的教程放上去，这里只需要参考其中配置地图引用的部分就好了，因为是离线地图估计百度地图的key可能不大需要，毕竟是离线地图使用鉴权也没必要Android关于百度地图的开发心得（笔记一（配置与基本使用））
第二步，下载离线地图功能
这一部分是直接拿demo上的下载功能，他的下载功能及查看效果如下：
直接贴代码了，新建一个activity页面，这里我是起的TestActivity：
public class TestActivity extends AppCompatActivity implements MKOfflineMapListener{
private MKOfflineMap mOffline = null;
private TextView cidView;
private TextView stateView;
private EditText cityNameView;
// 已下载的离线地图信息列表
private ArrayList<MKOLUpdateElement> localMapList = null;
private LocalMapAdapter lAdapter = null;
private LinearLayout mCityList;
private LinearLayout mLocalMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
mOffline = new MKOfflineMap();
mOffline.init(this);
initView();
}
private void initView() {
cidView = (TextView) findViewById(R.id.cityid);
cityNameView = (EditText) findViewById(R.id.city);
stateView = (TextView) findViewById(R.id.state);
mCityList = (LinearLayout) findViewById(R.id.citylist_layout);
mLocalMap = (LinearLayout) findViewById(R.id.localmap_layout);
ListView hotCityList = (ListView) findViewById(R.id.hotcitylist);
ArrayList<String> hotCities = new ArrayList<String>();
final ArrayList<String> hotCityNames = new ArrayList<String>();
// 获取热闹城市列表
ArrayList<MKOLSearchRecord> records1 = mOffline.getHotCityList();
if (records1 != null) {
for (MKOLSearchRecord r : records1) {
//V4.5.0起，保证数据不溢出，使用long型保存数据包大小结果
hotCities.add(r.cityName + "(" + r.cityID + ")" + " --" + this.formatDataSize(r.dataSize));
hotCityNames.add(r.cityName);
}
}
ListAdapter hAdapter = (ListAdapter) new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, hotCities);
hotCityList.setAdapter(hAdapter);
hotCityList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
cityNameView.setText(hotCityNames.get(i));
}
});
ListView allCityList = (ListView) findViewById(R.id.allcitylist);
// 获取所有支持离线地图的城市
ArrayList<String> allCities = new ArrayList<String>();
final ArrayList<String> allCityNames = new ArrayList<String>();
ArrayList<MKOLSearchRecord> records2 = mOffline.getOfflineCityList();
if (records2 != null) {
for (MKOLSearchRecord r : records2) {
//V4.5.0起，保证数据不溢出，使用long型保存数据包大小结果
allCities.add(r.cityName + "(" + r.cityID + ")" + " --" + this.formatDataSize(r.dataSize));
allCityNames.add(r.cityName);
}
}
ListAdapter aAdapter = (ListAdapter) new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, allCities);
allCityList.setAdapter(aAdapter);
allCityList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
cityNameView.setText(allCityNames.get(i));
}
});
mLocalMap.setVisibility(View.GONE);
mCityList.setVisibility(View.VISIBLE);
// 获取已下过的离线地图信息
localMapList = mOffline.getAllUpdateInfo();
if (localMapList == null) {
localMapList = new ArrayList<MKOLUpdateElement>();
}
ListView localMapListView = (ListView) findViewById(R.id.localmaplist);
lAdapter = new LocalMapAdapter();
localMapListView.setAdapter(lAdapter);
}
/**
* 切换至城市列表
*
* @param view
*/
public void clickCityListButton(View view) {
mLocalMap.setVisibility(View.GONE);
mCityList.setVisibility(View.VISIBLE);
}
/**
* 切换至下载管理列表
*
* @param view
*/
public void clickLocalMapListButton(View view) {
mLocalMap.setVisibility(View.VISIBLE);
mCityList.setVisibility(View.GONE);
}
/**
* 搜索离线城市
*
* @param view
*/
public void search(View view) {
ArrayList<MKOLSearchRecord> records = mOffline.searchCity(cityNameView.getText().toString());
if (records == null || records.size() != 1) {
Toast.makeText(this, "不支持该城市离线地图", Toast.LENGTH_SHORT).show();
return;
}
cidView.setText(String.valueOf(records.get(0).cityID));
}
/**
* 开始下载
*
* @param view
*/
public void start(View view) {
int cityid = Integer.parseInt(cidView.getText().toString());
mOffline.start(cityid);
clickLocalMapListButton(null);
Toast.makeText(this, "开始下载离线地图. cityid: " + cityid, Toast.LENGTH_SHORT).show();
updateView();
}
/**
* 暂停下载
*
* @param view
*/
public void stop(View view) {
int cityid = Integer.parseInt(cidView.getText().toString());
mOffline.pause(cityid);
Toast.makeText(this, "暂停下载离线地图. cityid: " + cityid, Toast.LENGTH_SHORT).show();
updateView();
}
/**
* 删除离线地图
*
* @param view
*/
public void remove(View view) {
int cityid = Integer.parseInt(cidView.getText().toString());
mOffline.remove(cityid);
Toast.makeText(this, "删除离线地图. cityid: " + cityid, Toast.LENGTH_SHORT).show();
updateView();
}
/**
* 更新状态显示
*/
public void updateView() {
localMapList = mOffline.getAllUpdateInfo();
if (localMapList == null) {
localMapList = new ArrayList<MKOLUpdateElement>();
}
lAdapter.notifyDataSetChanged();
}
@Override
protected void onPause() {
super.onPause();
int cityid = Integer.parseInt(cidView.getText().toString());
MKOLUpdateElement temp = mOffline.getUpdateInfo(cityid);
if (temp != null && temp.status == MKOLUpdateElement.DOWNLOADING) {
mOffline.pause(cityid);
}
}
/**
* V4.5.0起，保证数据不溢出，使用long型保存数据包大小结果
*/
public String formatDataSize(long size) {
String ret = "";
if (size < (1024 * 1024)) {
ret = String.format("%dK", size / 1024);
} else {
ret = String.format("%.1fM", size / (1024 * 1024.0));
}
return ret;
}
@Override
protected void onDestroy() {
super.onDestroy();
// 退出时，销毁离线地图模块
mOffline.destroy();
}
@Override
public void onGetOfflineMapState(int type, int state) {
switch (type) {
case MKOfflineMap.TYPE_DOWNLOAD_UPDATE:
MKOLUpdateElement update = mOffline.getUpdateInfo(state);
// 处理下载进度更新提示
if (update != null) {
stateView.setText(String.format("%s : %d%%", update.cityName, update.ratio));
updateView();
}
break;
case MKOfflineMap.TYPE_NEW_OFFLINE:
// 有新离线地图安装
Log.d("OfflineDemo", String.format("add offlinemap num:%d", state));
break;
case MKOfflineMap.TYPE_VER_UPDATE:
// 版本更新提示
// MKOLUpdateElement e = mOffline.getUpdateInfo(state);
break;
default:
break;
}
}
/**
* 离线地图管理列表适配器
*/
public class LocalMapAdapter extends BaseAdapter {
@Override
public int getCount() {
return localMapList.size();
}
@Override
public Object getItem(int index) {
return localMapList.get(index);
}
@Override
public long getItemId(int index) {
return index;
}
@Override
public View getView(int index, View view, ViewGroup arg2) {
MKOLUpdateElement e = (MKOLUpdateElement) getItem(index);
view = View.inflate(TestActivity.this, R.layout.offline_localmap_list, null);
initViewItem(view, e);
return view;
}
void initViewItem(View view, final MKOLUpdateElement e) {
Button display = (Button) view.findViewById(R.id.display);
Button remove = (Button) view.findViewById(R.id.remove);
TextView title = (TextView) view.findViewById(R.id.title);
TextView update = (TextView) view.findViewById(R.id.update);
TextView ratio = (TextView) view.findViewById(R.id.ratio);
ratio.setText(e.ratio + "%");
title.setText(e.cityName);
if (e.update) {
update.setText("可更新");
} else {
update.setText("最新");
}
if (e.ratio != 100) {
display.setEnabled(false);
} else {
display.setEnabled(true);
}
remove.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
mOffline.remove(e.cityID);
updateView();
}
});
display.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.putExtra("customStyle", true);
intent.putExtra("x", e.geoPt.longitude以上是关于Android实现百度离线地图+gps定位的主要内容，如果未能解决你的问题，请参考以下文章
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