我有一台阿尔卡特 One Touch 7040，当我在上面测试我的 osmdroid 样本时， map 无法呈现。我在其他设备上测试过， map 在其中正确渲染，只有在这个设备上他们没有。我以为我的设备内存不足，所以我从设备中删除了一些应用程序，但仍然没有任何改善，有人可以告诉我可能是什么原因吗？
以下是我的logcat(由于超出字数限制，部分内容已被删除):
10-17 23:03:27.688 26424-26424/marine.com.osmsample I/OsmDroid: Using tile source: Mapnik
10-17 23:03:27.702 26424-26424/marine.com.osmsample E/OsmDroid: unable to create a nomedia file. downloaded tiles may be visible to the gallery. open failed: ENOENT (No such file or directory)
10-17 23:03:27.715 26424-26424/marine.com.osmsample E/SQLiteLog: (14) cannot open file at line 30202 of [00bb9c9ce4]
10-17 23:03:27.715 26424-26424/marine.com.osmsample E/SQLiteLog: (14) os_unix.c:30202: (2) open(/storage/sdcard0/osmdroid/tiles/cache.db) -
10-17 23:03:27.729 26424-26424/marine.com.osmsample E/SQLiteDatabase: Failed to open database '/storage/sdcard0/osmdroid/tiles/cache.db'.
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:209)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:709)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:702)
at org.osmdroid.tileprovider.modules.SqlTileWriter.<init>(SqlTileWriter.java:44)
at org.osmdroid.tileprovider.MapTileProviderBasic.<init>(MapTileProviderBasic.java:76)
at org.osmdroid.tileprovider.MapTileProviderBasic.<init>(MapTileProviderBasic.java:50)
at org.osmdroid.views.MapView.<init>(MapView.java:170)
at org.osmdroid.views.MapView.<init>(MapView.java:200)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
at android.view.LayoutInflater.createView(LayoutInflater.java:587)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:285)
at android.app.Activity.setContentView(Activity.java:1882)
at marine.com.osmsample.MainActivity.onCreate(MainActivity.java:55)
at android.app.Activity.performCreate(Activity.java:5121)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.access$600(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
10-17 23:03:27.731 26424-26424/marine.com.osmsample E/OsmDroid: Unable to start the sqlite tile writer. Check external storage availability.
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:209)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:709)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:702)
at org.osmdroid.tileprovider.modules.SqlTileWriter.<init>(SqlTileWriter.java:44)
at org.osmdroid.tileprovider.MapTileProviderBasic.<init>(MapTileProviderBasic.java:76)
at org.osmdroid.tileprovider.MapTileProviderBasic.<init>(MapTileProviderBasic.java:50)
at org.osmdroid.views.MapView.<init>(MapView.java:170)
at org.osmdroid.views.MapView.<init>(MapView.java:200)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
at android.view.LayoutInflater.createView(LayoutInflater.java:587)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:285)
at android.app.Activity.setContentView(Activity.java:1882)
at marine.com.osmsample.MainActivity.onCreate(MainActivity.java:55)
at android.app.Activity.performCreate(Activity.java:5121)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.access$600(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
10-17 23:03:27.732 26424-26424/marine.com.osmsample D/dalvikvm: create interp thread : stack size=128KB
10-17 23:03:27.732 26424-26424/marine.com.osmsample D/dalvikvm: create new thread
10-17 23:03:27.732 26424-26424/marine.com.osmsample D/dalvikvm: new thread created
10-17 23:03:27.732 26424-26424/marine.com.osmsample D/dalvikvm: update thread list
10-17 23:03:27.732 26424-26944/marine.com.osmsample D/dalvikvm: threadid=17: interp stack at 0x5f42b000
10-17 23:03:27.732 26424-26944/marine.com.osmsample D/dalvikvm: threadid=17: created from interp
10-17 23:03:27.732 26424-26424/marine.com.osmsample D/dalvikvm: start new thread
10-17 23:03:27.733 26424-26944/marine.com.osmsample D/dalvikvm: threadid=17: notify debugger
10-17 23:03:27.733 26424-26944/marine.com.osmsample D/dalvikvm: threadid=17 (Thread-2646): calling run()
10-17 23:03:27.733 26424-26944/marine.com.osmsample D/dalvikvm: threadid=17: exiting
10-17 23:03:27.733 26424-26944/marine.com.osmsample D/dalvikvm: threadid=17: bye!
10-17 23:03:27.739 26424-26424/marine.com.osmsample I/OsmDroid: sdcard state: mounted
10-17 23:03:27.745 26424-26424/marine.com.osmsample I/OsmDroid: sdcard state: mounted
10-17 23:03:27.746 26424-26424/marine.com.osmsample E/SQLiteLog: (14) cannot open file at line 30202 of [00bb9c9ce4]
10-17 23:03:27.746 26424-26424/marine.com.osmsample E/SQLiteLog: (14) os_unix.c:30202: (2) open(/storage/sdcard0/osmdroid/tiles/cache.db) -
10-17 23:03:27.749 26424-26424/marine.com.osmsample E/SQLiteDatabase: Failed to open database '/storage/sdcard0/osmdroid/tiles/cache.db'.
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:209)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:709)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:702)
at org.osmdroid.tileprovider.modules.SqlTileWriter.<init>(SqlTileWriter.java:44)
at org.osmdroid.tileprovider.modules.MapTileSqlCacheProvider.<init>(MapTileSqlCacheProvider.java:57)
at org.osmdroid.tileprovider.modules.MapTileSqlCacheProvider.<init>(MapTileSqlCacheProvider.java:63)
at org.osmdroid.tileprovider.MapTileProviderBasic.<init>(MapTileProviderBasic.java:88)
at org.osmdroid.tileprovider.MapTileProviderBasic.<init>(MapTileProviderBasic.java:50)
at org.osmdroid.views.MapView.<init>(MapView.java:170)
at org.osmdroid.views.MapView.<init>(MapView.java:200)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
at android.view.LayoutInflater.createView(LayoutInflater.java:587)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:285)
at android.app.Activity.setContentView(Activity.java:1882)
at marine.com.osmsample.MainActivity.onCreate(MainActivity.java:55)
at android.app.Activity.performCreate(Activity.java:5121)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.access$600(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
10-17 23:03:27.753 26424-26424/marine.com.osmsample E/OsmDroid: Unable to start the sqlite tile writer. Check external storage availability.
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:209)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:709)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:702)
at org.osmdroid.tileprovider.modules.SqlTileWriter.<init>(SqlTileWriter.java:44)
at org.osmdroid.tileprovider.modules.MapTileSqlCacheProvider.<init>(MapTileSqlCacheProvider.java:57)
at org.osmdroid.tileprovider.modules.MapTileSqlCacheProvider.<init>(MapTileSqlCacheProvider.java:63)
at org.osmdroid.tileprovider.MapTileProviderBasic.<init>(MapTileProviderBasic.java:88)
at org.osmdroid.tileprovider.MapTileProviderBasic.<init>(MapTileProviderBasic.java:50)
at org.osmdroid.views.MapView.<init>(MapView.java:170)
at org.osmdroid.views.MapView.<init>(MapView.java:200)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
at android.view.LayoutInflater.createView(LayoutInflater.java:587)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:285)
at android.app.Activity.setContentView(Activity.java:1882)
at marine.com.osmsample.MainActivity.onCreate(MainActivity.java:55)
at android.app.Activity.performCreate(Activity.java:5121)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.access$600(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
10-17 23:03:39.774 26424-27015/marine.com.osmsample D/OsmDroid: Unable to store cached tile from Mapnik /14/9291/6359, database not available.
10-17 23:03:39.792 26424-27015/marine.com.osmsample I/System.out: [CDS]rx timeout:0
10-17 23:03:39.819 26424-27003/marine.com.osmsample D/OsmDroid: Unable to store cached tile from Mapnik /14/9292/6359, database not available.
10-17 23:03:39.823 26424-27003/marine.com.osmsample I/System.out: [CDS]rx timeout:0
10-17 23:03:39.846 26424-27015/marine.com.osmsample D/OsmDroid: Unable to store cached tile from Mapnik /14/9290/6359, database not available.
10-17 23:03:39.852 26424-27015/marine.com.osmsample I/System.out: [CDS]rx timeout:0
最佳答案
设备的 API 级别是什么？这可能是权限问题。有时 android 也会将 Environment.getExternalStorageDir() 挂载为只读，这是错误的。总有一天我会通过变通办法来解决这个问题。
osmdroid 提供的示例应用程序是否有效？你不仅要启动它，你还得放大一点。示例应用附带了一些缓存的磁贴。
查看堆栈跟踪，Environment.getExternalStorageDir() 正在返回一个只读挂载点。因此，唯一合理的解决方案是告诉 osmdroid 在该类型的设备上使用不同的缓存位置。它可以很容易地完成，但必须在创建 map View 之前完成。此链接包含使用 osmdroid 进行的 API 调用
Using osmdroid without getting access to external storage
这个答案https://stackoverflow.com/a/15612964/1203182有一些很棒的代码可以返回可写的挂载点/路径列表。提示用户询问缓存存储位置可能是个好主意
编辑:在 osmdroid 5.6 中添加，添加了我讨论的解决方法，以及示例应用程序“打开 map ”中的示例，向您展示如何使用它。 osmdroid 5.6 及以上版本的默认缓存位置是最大的可写存储分区。然后这将被保存为首选项(再次参见示例应用程序)
关于android - Osmdroid map 未加载到我的设备上，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40100080/