Android 如何将“marker.getId（）”保存到SQlite数据库？

我试图将标记附带的额外数据保存到SQlite数据库。因此，我面临的问题是，应用程序因以下错误而崩溃：

12-22 09:12:04.096: E/SQLiteLog(17668): (1) no such column: img
12-22 09:12:04.106: W/dalvikvm(17668): threadid=23: thread exiting with uncaught exception (group=0x41816da0)
12-22 09:12:04.106: D/AbsListView(17668): onVisibilityChanged() is called, visibility : 4
12-22 09:12:04.106: D/AbsListView(17668): unregisterIRListener() is called 
12-22 09:12:04.106: E/AndroidRuntime(17668): FATAL EXCEPTION: ModernAsyncTask #1
12-22 09:12:04.106: E/AndroidRuntime(17668): Process: com.example.mainapp, PID: 17668
12-22 09:12:04.106: E/AndroidRuntime(17668): java.lang.RuntimeException: An error occured while executing doInBackground()
12-22 09:12:04.106: E/AndroidRuntime(17668):    at android.support.v4.content.ModernAsyncTask$3.done(ModernAsyncTask.java:137)
12-22 09:12:04.106: E/AndroidRuntime(17668):    at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
12-22 09:12:04.106: E/AndroidRuntime(17668):    at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
12-22 09:12:04.106: E/AndroidRuntime(17668):    at java.util.concurrent.FutureTask.run(FutureTask.java:242)
12-22 09:12:04.106: E/AndroidRuntime(17668):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
12-22 09:12:04.106: E/AndroidRuntime(17668):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
12-22 09:12:04.106: E/AndroidRuntime(17668):    at java.lang.Thread.run(Thread.java:841)
12-22 09:12:04.106: E/AndroidRuntime(17668): Caused by:  android.database.sqlite.SQLiteException: no such column: img (code 1): , while compiling:  SELECT _id, lat, lng, zom, img FROM locations

现在，我在LocationsDB.java类中放置了一列：

然后

@Override
public void onCreate(SQLiteDatabase db) {
    String sql =     "create table " + DATABASE_TABLE + " ( " +
    FIELD_ROW_ID + " integer primary key autoincrement , " +
    FIELD_LNG + " double , " +
    FIELD_LAT + " double , " +
    FIELD_ZOOM + " text " +
    FIELD_IMAGE + "img" + //this line here added
    " ) ";
    db.execSQL(sql);
}

以及这里：

public Cursor getAllLocations(){
    return mDB.query(DATABASE_TABLE, new String[] { FIELD_ROW_ID,  FIELD_LAT , FIELD_LNG, FIELD_ZOOM, FIELD_IMAGE } , null, null, null, null, null, null); //FIELD_IMAGE added and null at the end

然后在我的MainActivity课程中，我添加了：

ContentValues contentValues = new ContentValues();
contentValues.put(LocationsDB.FIELD_LAT, point.latitude );
contentValues.put(LocationsDB.FIELD_LNG, point.longitude);
contentValues.put(LocationsDB.FIELD_IMAGE, markerId + bitmap); //this line here added
contentValues.put(LocationsDB.FIELD_ZOOM, googleMap.getCameraPosition().zoom);

只是为了补充一点，我使用HashMap来显示特定标记的图像

private Map<String, Bitmap> myMarkersHash;
private String markerId;

....

myMarkersHash = new HashMap<String, Bitmap>();

....

Marker marker = googleMap.addMarker(new MarkerOptions()
    .position(thePoint));
markerId = marker.getId();

....

Bitmap bitmap = myMarkersHash.get(marker.getId());
markerIcon.setImageBitmap(bitmap);

我做错了什么？昨天我发布了一个类似的问题，但是我决定用我添加的代码来问一个新问题，而不是仅仅用没有代码的代码来让别人试着弄清楚我在做什么

谢谢

您忘记了，字段后加逗号+文本+

更正：

---

如果您最近添加了此专栏，则必须卸载应用程序并重新安装新构建的apk。

首先，您必须更正创建数据库的方式。img字段不存在，并且您没有创建有效的数据库字段img不是类型。修复数据库创建：

@Override
public void onCreate(SQLiteDatabase db) {
    String sql =     "create table " + DATABASE_TABLE + " ( " +
    FIELD_ROW_ID + " integer primary key autoincrement , " +
    FIELD_LNG + " double , " +
    FIELD_LAT + " double , " +
    FIELD_ZOOM + " text, " +   //Here forget a comma
    FIELD_IMAGE + " text" + //Here forget a space and you had put bad sqlite type, now text
    " ) ";
    db.execSQL(sql);
}

---

最后，您必须卸载并重新安装应用程序。

很酷，谢谢，现在真的很尴尬：-我是否正确保存了该标记的图像？您必须使用两个字段：标记id文本或数字和imgtext引用路径或blob（如果数据库上为二进制），好的，但我不确定如何做？这是我第一次使用SQlite。你能告诉我怎么做吗？添加字段标记ID和字段图像。在FIELD_MARKER_ID save ID MARKER和FIELD_IMAGE中保存图像。我已经这样做了，但是我尝试保存的图像是位图，因此我在写入contentValues时得到并出错错误是方法putString，contentValues类型中的字符串不适用于参数String，bitmap

public void onLoadFinished(Loader<Cursor> arg0, Cursor arg1) {
int locationCount = 0;
 double lat=0;
 double lng=0;
 float zoom=0;
 float img=0; //This Line here added
 locationCount = arg1.getCount();
 arg1.moveToFirst();

 for(int i=0;i<locationCount;i++){

 lat = arg1.getDouble(arg1.getColumnIndex(LocationsDB.FIELD_LAT));
 lng = arg1.getDouble(arg1.getColumnIndex(LocationsDB.FIELD_LNG));
 zoom = arg1.getFloat(arg1.getColumnIndex(LocationsDB.FIELD_ZOOM));
 img = arg1.getFloat(arg1.getColumnIndex(LocationsDB.FIELD_IMAGE)); //This line here added
 thePoint = new LatLng(lat, lng);
 drawMarker(thePoint);
 arg1.moveToNext();
 }

 if(locationCount>0){
 googleMap.moveCamera(CameraUpdateFactory.newLatLng(new LatLng(lat,lng)));
 googleMap.animateCamera(CameraUpdateFactory.zoomTo(zoom));
 bitmap = myMarkersHash.get(img); //This line here added
  }
}

    String sql =     "create table " + DATABASE_TABLE + " ( " +
    FIELD_ROW_ID + " integer primary key autoincrement , " +
    FIELD_LNG + " double , " +
    FIELD_LAT + " double , " +
    FIELD_ZOOM + " text, " +
    FIELD_IMAGE + "img" + //this line here added
    " ) ";

@Override
public void onCreate(SQLiteDatabase db) {
    String sql =     "create table " + DATABASE_TABLE + " ( " +
    FIELD_ROW_ID + " integer primary key autoincrement , " +
    FIELD_LNG + " double , " +
    FIELD_LAT + " double , " +
    FIELD_ZOOM + " text, " +   //Here forget a comma
    FIELD_IMAGE + " text" + //Here forget a space and you had put bad sqlite type, now text
    " ) ";
    db.execSQL(sql);
}