如何在sql数据库中搜索字符串-Android

如果我想使用java在下面的sql数据库中搜索字符串，我会怎么做？我真的不知道从哪里开始他们的网站上有没有关于这方面的资料？。。。非常感谢。我想我可以使用某种strstr函数或其他东西来收集表中的字符串

package f.s.l;

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.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

public class HotOrNot {
public static final String KEY_ROWID ="_id";
public static final String KEY_NAME ="persons_name";
public static final String KEY_HOTNESS ="persons_hotness";

private static final String DATABASE_NAME ="HotOrNotdb";
private static final String DATABASE_TABLE ="peopleTable";
private static final int DATABASE_VERSION =1;

private DbHelper ourHelper;
private final Context ourContext;
private SQLiteDatabase ourDatabase;

private static class DbHelper extends SQLiteOpenHelper{

public DbHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}

@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" +
        KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
        KEY_NAME + " TEXT NOT NULL, " +
        KEY_HOTNESS + " TEXT NOT NULL);"


        );

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
onCreate(db);

}

}
public HotOrNot(Context c){
ourContext =c;
}
public HotOrNot open() throws SQLException{ 
ourHelper = new DbHelper(ourContext);
ourDatabase = ourHelper.getWritableDatabase();
return this;
}
public void close(){

 ourHelper.close();
 }
 public long createEntry(String name, String hotness) {
 // TODO Auto-generated method stub
 ContentValues cv = new ContentValues();
 cv.put(KEY_NAME, name);
 cv.put(KEY_HOTNESS, hotness);
 return ourDatabase.insert(DATABASE_TABLE, null, cv);

 }
 public String getData() {
 // TODO Auto-generated method stub
String [] columns = new String[]{ KEY_ROWID, KEY_NAME, KEY_HOTNESS};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
String result = "";

int iRow = c.getColumnIndex(KEY_ROWID);
int iName = c.getColumnIndex(KEY_NAME);
int iHotness = c.getColumnIndex(KEY_HOTNESS);

for(c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {


result = result + c.getString(iRow) + " "+ c.getString(iName) + " " +                c.getString(iHotness) + "\n";
}



return result;
}
}

在查询方法中，需要声明WHERE子句。例如：

Cursor c = ourDatabase.query(DATABASE_TABLE, columns, "some_col like " + "'%Somevalue%'", null, null, null, null);

---

LIKE是一个很好的SQL关键字，可供您查找…

请尝试以下代码进行搜索：-

public Cursor getROUTINENAME(String search_str) {
        String query = "SELECT * FROM TBNAME where COL_NAME LIKE '%"+search_str+"%'";

        Cursor mCursor = db.rawQuery(query, null);
        if (mCursor != null) {
            mCursor.moveToFirst();
        }
        return mCursor;
    }

---

使用字符串调用上述函数。

字符串查询=选择*FROM+DB_NAME+WHERE+COLUMN_dars+LIKE+'+SELECT+'

    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor = db.rawQuery(query,null);

---

基本上到处都有大量的Android教程，包括Android文档。您是否正在尝试进行全文搜索、搜索多少数据、搜索的字符串有多大、是否匹配整个列的内容等。所有这些都会产生影响。我正在尝试对创建的表进行全文搜索。它们是包含字符串的三个变量的集合，我想搜索存储在它们中的字符串。只是一个提示，这出现在低质量的后期审查队列中。请编辑您的帖子，为未来偶然发现这个问题的人解释正在发生的事情。干杯~