Question

我尝试了什么

Hello Guys，我首先创建了一个数据库，我已经填充了3个Collumns， RowID，imageID，text。然后我创建了一个GridView，如果填充在我的数据库中。现在我已经创建了一个onItemClickListner，我想在其中获取imageID。发生这种情况后，我在此imageID之后搜索我的DB-Table，以获取文本。这个东西我需要保存在我的另一个表中。问题是我认为，我没有得到imageID，并且喜欢这个serach for not not in the DB，如果你看一下Logcat，你会发现它是null，所以它可能没有得到imageID或者我在我的DBAdapter中搜索不像我应该的那样。

问题

IMPORTRANT： 我终于得到了View thx的ID到FuzzialLogic，但是仍然存在问题，我无法将Row放在我的Cursor上。请看一下！

＆LT; --------------------------------------------- - - - - 作品 - - - - - - - - - - - - - - - - - - - - - -----------------------＆GT; 我需要在我的代码中更改什么，我可以获取用户点击的图像的ID。之后我想用我的图像ID搜索我的数据库，以获取我用图像存储的文本。之后这些内容会出现在我的另一张表中。

在这里，您可以看到Code和LogCat-Log。如果有人需要，我还添加了我的DatabaseAdapter。感谢您在Advance中的帮助！

代码

SFilterConfigActivity.class：

    package de.retowaelchli.filterit;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.Toast;
import android.*;

import de.retowaelchli.filterit.database.SmileyDBAdapter;
import de.retowaelchli.filterit.database.SFilterDBAdapter;
import de.retowaelchli.filterit.stats.ImageAdapter;




public class SFilterConfigActivity extends Activity {

    //Variablen deklarieren
    private String name;
    private String keyword;
    private String smiley;
    private String text;

    private String source;
    private Integer[] info;

    private SmileyDBAdapter SmileyHelper;
    private SFilterDBAdapter mDbHelper;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.sfilter_config);

      SmileyHelper = new SmileyDBAdapter(this);
      mDbHelper = new SFilterDBAdapter(this);

      getImages();
      grid();
    }


public void grid(){

    //Hier wird die GridView definiert und anschliesend über den ImageAdapter gefüllt
    final GridView gridview = (GridView) findViewById(R.id.SmileyGrind);
    gridview.setAdapter(new ImageAdapter(this, info));


    //Hier wird definiert was passiert wenn auf ein Bild in der GridView geklickt wird
    gridview.setOnItemClickListener(new OnItemClickListener(){

        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
            Toast.makeText(SFilterConfigActivity.this, "" + position, Toast.LENGTH_SHORT).show();
           // gridview.setSelection(position);
           // Funktioniert noch nich Custom GridView Layout dafür erstellen siehe Stackoverflow
            if(position == gridview.getSelectedItemPosition()){
                v.setBackgroundColor(0xFF00FF00);

            }
            else{
                v.setBackgroundColor(0x0000000);
            }

            //Hier wird herrausgefunden welche ID das Bild hat und in den jeweiligen String gespeichert
            source = (new Long(id)).toString();

            SmileyHelper.open();
            Cursor c = SmileyHelper.getSmiley(source);
            startManagingCursor(c);

            if (c.moveToFirst()) { 
                do { 
                text = c.getString(c.getColumnIndex(SmileyDBAdapter.SOURCE)); 
                smiley = c.getString(c.getColumnIndex(SmileyDBAdapter.INFO)); 

                } while (c.moveToNext());
            SmileyHelper.close();


            }

        }

    });
}


public Integer[] getImages(){

    SmileyHelper.open();

    Cursor c = SmileyHelper.getAllSmileys();

    ArrayList<Integer> infoList = new ArrayList<Integer>();

    c.getColumnIndex(SmileyDBAdapter.INFO);
    int ColumnIndex = c.getColumnIndex(SmileyDBAdapter.INFO);

    if(c!=null)
    {

       while(c.moveToNext()){
           String infoItem = c.getString( ColumnIndex );
           infoList.add(Integer.parseInt(infoItem));
       }
    }


    info = infoList.toArray(new Integer[]{});

    c.close();


    SmileyHelper.close();


    return info;

}



public void onClickSConfigSave(View v){

    EditText edtTextName = (EditText)findViewById(R.id.SFConfigName);
    EditText edtTextKeyword = (EditText)findViewById(R.id.SFConfigKeyword);

    name = edtTextName.getText().toString();
    keyword = edtTextKeyword.getText().toString();

    mDbHelper.open();
    mDbHelper.createSFilter(name, keyword, smiley, text);
    mDbHelper.close();

    final Intent i = new Intent(this, SmileyActivity.class);
    startActivity(i);
    }
}

ImageAdapter.class

    package de.retowaelchli.filterit.stats;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;


//import de.retowaelchli.filterit.SFilterConfigActivity;

public class ImageAdapter extends BaseAdapter {

    // references to our images
    private Integer[] mThumbIds;
    private Context mContext;


    public ImageAdapter(Context c, Integer[] imageIds) {
        mContext = c;
        mThumbIds = imageIds;

    }



    public int getCount() {
       return mThumbIds.length;
    }

    public Object getItem(int position) {
        return mThumbIds[position];
    }

    public long getItemId(int position) {
        return position;
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(final int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {  // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setId(mThumbIds[position]);

        imageView.setImageResource(mThumbIds[position]);




        return imageView;




    }

}

像这样我将带有一些文字的图片添加到数据库中：

   private void angry(){

        int drawableID = context.getResources().getIdentifier("angry", "drawable", getPackageName());
        iv.setImageResource(drawableID);

        //String info = String.valueOf(drawableID);
        String info = String.valueOf(drawableID);

        mDbHelper.open();

        mDbHelper.createSmiley("You received a angry message", info);

        mDbHelper.close();
    }

日志 - 猫

这是日志：

10-12 11:32:29.632: DEBUG/Database(25130): dbopen(): path = /data/data/de.retowaelchli.filterit/databases/filterit, flag = 6
10-12 11:32:29.632: DEBUG/Database(25130): dbopen(): path = /data/data/de.retowaelchli.filterit/databases/filterit, free size = 663
10-12 11:32:30.612: DEBUG/Database(25130): dbopen(): path = /data/data/de.retowaelchli.filterit/databases/filterit, flag = 6
10-12 11:32:30.612: DEBUG/Database(25130): dbopen(): path = /data/data/de.retowaelchli.filterit/databases/filterit, free size = 663
10-12 11:32:30.632: ERROR/Database(25130): Error inserting text=null smiley=null keyword=test name=test
10-12 11:32:30.632: ERROR/Database(25130): android.database.sqlite.SQLiteConstraintException: error code 19: constraint failed
10-12 11:32:30.632: ERROR/Database(25130):     at android.database.sqlite.SQLiteStatement.native_execute(Native Method)
10-12 11:32:30.632: ERROR/Database(25130):     at android.database.sqlite.SQLiteStatement.execute(SQLiteStatement.java:61)
10-12 11:32:30.632: ERROR/Database(25130):     at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1671)
10-12 11:32:30.632: ERROR/Database(25130):     at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1515)
10-12 11:32:30.632: ERROR/Database(25130):     at de.retowaelchli.filterit.database.SFilterDBAdapter.createSFilter(SFilterDBAdapter.java:89)
10-12 11:32:30.632: ERROR/Database(25130):     at de.retowaelchli.filterit.SFilterConfigActivity.onClickSConfigSave(SFilterConfigActivity.java:143)
10-12 11:32:30.632: ERROR/Database(25130):     at java.lang.reflect.Method.invokeNative(Native Method)
10-12 11:32:30.632: ERROR/Database(25130):     at java.lang.reflect.Method.invoke(Method.java:507)
10-12 11:32:30.632: ERROR/Database(25130):     at android.view.View$1.onClick(View.java:2186)
10-12 11:32:30.632: ERROR/Database(25130):     at android.view.View.performClick(View.java:2532)
10-12 11:32:30.632: ERROR/Database(25130):     at android.view.View$PerformClick.run(View.java:9277)
10-12 11:32:30.632: ERROR/Database(25130):     at android.os.Handler.handleCallback(Handler.java:587)
10-12 11:32:30.632: ERROR/Database(25130):     at android.os.Handler.dispatchMessage(Handler.java:92)
10-12 11:32:30.632: ERROR/Database(25130):     at android.os.Looper.loop(Looper.java:143)
10-12 11:32:30.632: ERROR/Database(25130):     at android.app.ActivityThread.main(ActivityThread.java:4196)
10-12 11:32:30.632: ERROR/Database(25130):     at java.lang.reflect.Method.invokeNative(Native Method)
10-12 11:32:30.632: ERROR/Database(25130):     at java.lang.reflect.Method.invoke(Method.java:507)
10-12 11:32:30.632: ERROR/Database(25130):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-12 11:32:30.632: ERROR/Database(25130):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-12 11:32:30.632: ERROR/Database(25130):     at dalvik.system.NativeStart.main(Native Method)

在这里，您可以找到我的SmileyDBAdapter代码。

SmileyDB

package de.retowaelchli.filterit.database;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class SmileyDBAdapter {

        public static final String ROW_ID = "_id";
        public static final String SOURCE = "source";
        public static final String INFO = "info";

        private static final String DATABASE_TABLE = "smiley";

        private DatabaseHelper mDbHelper;
        private SQLiteDatabase mDb;

        private final Context mCtx;

        private static class DatabaseHelper extends SQLiteOpenHelper {

            DatabaseHelper(Context context) {
                super(context, DBAdapter.DATABASE_NAME, null, DBAdapter.DATABASE_VERSION);
            }

            @Override
            public void onCreate(SQLiteDatabase db) {
            }

            @Override
            public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            }
        }

        /**
         * Constructor - takes the context to allow the database to be
         * opened/created
         * 
         * @param ctx
         *            the Context within which to work
         */
        public SmileyDBAdapter(Context ctx) {
            this.mCtx = ctx;
        }


        public SmileyDBAdapter open() throws SQLException {
            this.mDbHelper = new DatabaseHelper(this.mCtx);
            this.mDb = this.mDbHelper.getWritableDatabase();
            return this;
        }

        /**
         * close return type: void
         */
        public void close() {
            this.mDbHelper.close();
        }


        public long createSmiley(String source, String info ){
            ContentValues initialValues = new ContentValues();
            initialValues.put(SOURCE, source);
            initialValues.put(INFO, info);
            return this.mDb.insert(DATABASE_TABLE, null, initialValues);
        }


        public boolean deleteSmiley(long rowId) {

            return this.mDb.delete(DATABASE_TABLE, ROW_ID + "=" + rowId, null) > 0;
        }

        public Cursor getAllSmileys() {

            return this.mDb.query(DATABASE_TABLE, new String[] { ROW_ID,
                    SOURCE, INFO }, null, null, null, null, null);
        }




        //Es wird nach der ID des smiley gesucht.
        public Cursor getSmiley(String info) throws SQLException {

            Cursor mCursor =

            this.mDb.query(true, DATABASE_TABLE, new String[] { ROW_ID, SOURCE,
                    INFO }, INFO + "=" + info, null, null, null, null, null);
            if (mCursor != null) {
                mCursor.moveToFirst();
            }
            return mCursor;
        }


        public boolean updateSmiley(long rowId, String source, String info,
                String cache){
            ContentValues args = new ContentValues();
            args.put(SOURCE, source);
            args.put(INFO, info);

            return this.mDb.update(DATABASE_TABLE, args, ROW_ID + "=" + rowId, null) >0; 
        }

    }

将对DBAdapter

package de.retowaelchli.filterit.database;

import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DBAdapter {

    public static final String DATABASE_NAME = "filterit";

    public static final int DATABASE_VERSION = 1;

    public static final String CREATE_TABLE_ADFILTER = "create table adfilter (_id integer primary key autoincrement, "
    + ADFilterDBAdapter.NAME+" not null ,"
    + ADFilterDBAdapter.KEYWORD+" not null ,"
    + ADFilterDBAdapter.CACHE + " not null );";

    private static final String CREATE_TABLE_SFILTER = "create table sfilter (_id integer primary key autoincrement, "
    +SFilterDBAdapter.NAME+" not null ,"
    +SFilterDBAdapter.KEYWORD+" not null ,"
    +SFilterDBAdapter.SMILEY+ " not null ,"
    +SFilterDBAdapter.TEXT+ " not null );";

    private static final String CREATE_TABLE_ADMESSAGES = "create table admessages (_id integer primary key autoincrement, "
    +MessagesDBAdapter.PHONENUMBER+" not null ,"
    +MessagesDBAdapter.MESSAGE+ " not null );";


    private static final String CREATE_TABLE_SMILEY = " create table smiley (_id integer primary key autoincrement, "
    +SmileyDBAdapter.SOURCE+" not null ,"
    +SmileyDBAdapter.INFO+ " not null );";


    private final Context context; 
    private DatabaseHelper DBHelper;
    private SQLiteDatabase db;

    /**
     * Constructor
     * @param ctx
     */
    public DBAdapter(Context ctx)
    {
        this.context = ctx;

    }

    private static class DatabaseHelper extends SQLiteOpenHelper 
    {
        DatabaseHelper(Context context) 
        {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
        }

        @Override
        public void onCreate(SQLiteDatabase db) 
        {
            db.execSQL(CREATE_TABLE_ADFILTER);
            db.execSQL(CREATE_TABLE_SFILTER);
            db.execSQL(CREATE_TABLE_ADMESSAGES);
            db.execSQL(CREATE_TABLE_SMILEY);
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, 
        int newVersion) 
        {               
            // Adding any table mods to this guy here
        }
    } 

   /**
     * open the db
     * @return this
     * @throws SQLException
     * return type: DBAdapter
     */
    public DBAdapter open() throws SQLException 
    {
        this.DBHelper = new DatabaseHelper(this.context);
        this.db = this.DBHelper.getWritableDatabase();
        return this;
    }

    /**
     * close the db 
     * return type: void
     */
    public void close() 
    {
        this.DBHelper.close();
    }

}

Answer 1

在你的ImageAdapter代码中。你有重写方法getItemid你返回0导致problem.try返回mThumbIds [position]我认为这将为你做到这一点。

欢呼声。

Answer 2

在getView方法的ImageAdapter类中添加以下代码行

imageView.setId(mThumbIds[postion]);

或其他选项位于gridview的onclick侦听器中，单击方法

source = (new Long(id)).toString();

用

替换这行代码

source = parent.getItemId(position);

现在这肯定会解决问题。

Answer 3

变化

  if(c!=null)
    {

       while(c.moveToNext()){
           String infoItem = c.getString( ColumnIndex );
           infoList.add(Integer.parseInt(infoItem));
       }
    }

到

if(c!=null)
        {

           while(!c.isAfterLast()){
               String infoItem = c.getString( ColumnIndex );
               infoList.add(Integer.parseInt(infoItem));
               c.moveToNext();
           }
        }

在GridView中获取View的ID

4 个答案: