osmdroid 超过4GB以上的mapzip加载不出来给出具体执行方案和可运行的代码
要加载超过4GB的map.zip文件,你需要使用osmdroid的MapTileFileArchiveProvider进行加载。这个提供者可以处理超过4GB的zip文件。下面是一个示例代码,演示了如何加载超过4GB的map.zip文件:
import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.Environment;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import org.osmdroid.config.Configuration;
import org.osmdroid.tileprovider.MapTileProviderBasic;
import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapView;
public class MainActivity extends AppCompatActivity {
private MapView mapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//请求存储权限
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
1);
} else {
initializeMap();
}
}
private void initializeMap() {
//设置osmdroid的缓存目录为外部存储的根目录
Configuration.getInstance().setOsmdroidBasePath(
Environment.getExternalStorageDirectory().getAbsolutePath());
//设置osmdroid的缓存路径
Configuration.getInstance().setOsmdroidTileCache(
Environment.getExternalStorageDirectory().getAbsolutePath() + "/osmdroid");
mapView = findViewById(R.id.mapView);
mapView.setTileSource(TileSourceFactory.MAPNIK);
mapView.setBuiltInZoomControls(true);
mapView.setMultiTouchControls(true);
mapView.getController().setZoom(10);
mapView.getController().setCenter(new GeoPoint(40.7128, -74.0060));
//创建MapTileProviderBasic实例
MapTileProviderBasic provider = new MapTileProviderBasic(this,
TileSourceFactory.DEFAULT_TILE_SOURCE);
//设置MapTileFileArchiveProvider为提供者
provider.setTileLoader(new MapTileFileArchiveProvider(
new SimpleRegisterReceiver(this),
TileSourceFactory.DEFAULT_TILE_SOURCE,
new String[]{"path/to/map.zip"})); //替换为你的map.zip文件路径
//将提供者设置给MapView
mapView.setTileProvider(provider);
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
if (requestCode == 1) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
initializeMap();
}
}
}
}
请确保将"path/to/map.zip"替换为你实际的map.zip文件路径。
此外,你还需要在AndroidManifest.xml文件中添加以下权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
这样就可以加载超过4GB的map.zip文件了
原文地址: https://www.cveoy.top/t/topic/hVOi 著作权归作者所有。请勿转载和采集!