android sqlite和listview 使用小例子

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sdk: mini8 target18

项目截图 android sqlite和listview 使用小例子_第1张图片

演示

主要代码

adapter

package com.my.dbtest.adapter;import java.util.ArrayList;import java.util.List;import com.icedcap.dbtest.R;import com.my.dbtest.helper.Persion;import android.app.Activity;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.TextView;public class PersionAdapter extends BaseAdapter {    public ArrayList persions = null;    Activity context;    public ArrayList checkedIds;    public PersionAdapter(Activity context) {        super();        checkedIds = new ArrayList();        this.context = context;        persions = new ArrayList();    }    public void setPersions(ArrayList persions){        this.persions = persions;    }    @Override    public int getCount() {        return persions.size();    }    @Override    public Object getItem(int position) {        return persions.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @SuppressWarnings("static-access")    @Override    public View getView(int position, View convertView, ViewGroup parent) {        final ViewHolder holder;        final Persion item = this.persions.get(position);        if (convertView == null) {            convertView = LayoutInflater.from(context).from(context).inflate(R.layout.persionitem, null);            holder = new ViewHolder();            holder.ck = (CheckBox)convertView.findViewById(R.id.ck);            holder.tv1 = (TextView)convertView.findViewById(R.id.tv1);            holder.tv2 = (TextView)convertView.findViewById(R.id.tv2);            holder.tv3 = (TextView)convertView.findViewById(R.id.tv3);            holder.tv4 = (TextView)convertView.findViewById(R.id.tv4);            holder.tv5 = (TextView)convertView.findViewById(R.id.tv5);            holder.ck.setOnCheckedChangeListener(new OnCheckedChangeListener() {                @Override                public void onCheckedChanged(CompoundButton buttonView,                        boolean isChecked) {                    if(isChecked){                        checkedIds.add(holder.tv1.getText().toString());                    }else{                        checkedIds.remove(holder.tv1.getText().toString());                    }                    item.CheckState = isChecked;                }            });            convertView.setTag(holder);        } else {            holder = (ViewHolder) convertView.getTag();        }        holder.tv1.setText(item.Id);        holder.tv2.setText(item.Name);        holder.tv3.setText(item.Age);        holder.tv4.setText(item.Height);        holder.tv5.setText(item.Weight);        holder.ck.setChecked(item.CheckState);        //赋值        return convertView;    }    class ViewHolder {        CheckBox ck;        TextView tv1;        TextView tv2;        TextView tv3;        TextView tv4;        TextView tv5;    }}

dbHeper

package com.my.dbtest.helper;import android.content.ContentValues;import android.content.Context;import android.database.Cursor;import android.database.sqlite.SQLiteDatabase;import android.database.sqlite.SQLiteDatabase.CursorFactory;import android.database.sqlite.SQLiteOpenHelper;import android.util.Log;public class DbHelper extends SQLiteOpenHelper {    private SQLiteDatabase db = null;    private Cursor cursor = null;    private String TAG = "DBTest";    private boolean isInit;    private String createString;    public DbHelper(Context context, String dbName, CursorFactory factory,            int version) {        super(context, dbName, factory, version);    }    // 建表    @Override    public void onCreate(SQLiteDatabase db) {        this.db = db;        db.execSQL(createString);    }    public void inItDb(String createString) {        if (isInit)            return;        this.createString = createString;        this.isInit = true;    }    // 增    public void insert(ContentValues values, String tableName) {        SQLiteDatabase db = getWritableDatabase();        System.out.println("values" + values.get("id") + values.get("name")                + values.get("age"));        db.insert(tableName, null, values);        Log.i(TAG, "增加一行");        db.close();    }    // 删除某一行    public void delete(String id, String tableName) {        // if (db == null) {        SQLiteDatabase db = getWritableDatabase();        // }        db.delete(tableName, "id=?", new String[] { String.valueOf(id) });        Log.i(TAG, "删除一行");    }    // 更新某一行    public void update(ContentValues values, String string, String tableName) {        SQLiteDatabase db = getWritableDatabase();        db.update(tableName, values, "id=?", new String[] { string });        db.close();        Log.i(TAG, "更新一行");    }    // 按id查询    public Cursor query(String string, String tableName) {        SQLiteDatabase db = getWritableDatabase();        System.out.println("id---->" + string);        cursor = db.query(tableName, null, "id=?", new String[] { string },                null, null, null);        Log.i(TAG, "按id查询一行");        return cursor;    }    public Cursor query(String tableName) {        SQLiteDatabase db = getWritableDatabase();        cursor = db.query(tableName, null, null, null, "id", null, "id");        Log.i(TAG, "查询所有");        return cursor;    }    // 按sql语句操作数据库    public void handleBySql(String sql) {        SQLiteDatabase db = getWritableDatabase();        db.execSQL(sql);        Log.i(TAG, "执行sql语句");    }    // 关闭数据库    public void close() {        if (db != null) {            db.close();            db = null;        }        if (cursor != null) {            cursor.close();            cursor = null;        }    }    @Override    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {    }}

项目源码：http://pan.baidu.com/s/1c0fR48S

演示

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