发布网友 发布时间:2022-04-07 18:22
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懂视网 时间:2022-04-07 22:44
package com.example.sqlitedemo; 2 3 import android.app.Activity; 4 import android.database.Cursor; 5 import android.database.sqlite.SQLiteDatabase; 6 import android.os.Bundle; 7 import android.util.Log; 8 import android.view.Menu; 9 import android.view.MenuItem; 10 import android.view.View; 11 12 public class MainActivity extends Activity { 13 SQLiteDatabase db = null; 14 public static String TAG = "sqlitedemo"; 15 @Override 16 protected void onCreate(Bundle savedInstanceState) { 17 super.onCreate(savedInstanceState); 18 setContentView(R.layout.activity_main); 19 20 db = SQLiteDatabase.openOrCreateDatabase(getFilesDir()+"/userinfo.db", null); 21 22 createTable(db); 23 } 24 public void insert(View v){ 25 insert(db); 26 } 27 public void delete(View v){ 28 delete(db); 29 } 30 public void update(View v){ 31 update(db); 32 } 33 public void query(View v){ 34 query(db); 35 } 36 37 private void update(SQLiteDatabase db){ 38 String update = "update user set password=? where id = ?"; 39 Object[] args = {"99999999", 5}; 40 db.execSQL(update, args); 41 } 42 43 private void delete(SQLiteDatabase db){ 44 String delete = "delete from user where id =?"; 45 Object[] args = {5}; 46 db.execSQL(delete, args); 47 } 48 49 private void query(SQLiteDatabase db){ 50 String query = "select * from user"; 51 Cursor resultSet = db.rawQuery(query, null); 52 53 int row = resultSet.getCount(); 54 Log.i(TAG, row+""); 55 56 while(resultSet.moveToNext()){ 57 int id = resultSet.getInt(0); 58 String username = resultSet.getString(1); 59 String password = resultSet.getString(2); 60 Log.i(TAG, id + "," +username+ "," + password); 61 62 } 63 64 } 65 private void insert(SQLiteDatabase db){ 66 String insert = "insert into user values(?,?,?)"; 67 Object[] args = {5, "user5", "55555555"}; 68 db.execSQL(insert, args); 69 } 70 71 private void createTable(SQLiteDatabase db){ 72 String createtable = "create table user(id int, name varchar(20),password char(8))"; 73 db.execSQL(createtable); 74 } 75 76 77 } MainActivity.java
1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:orientation="vertical" 6 android:paddingBottom="@dimen/activity_vertical_margin" 7 android:paddingLeft="@dimen/activity_horizontal_margin" 8 android:paddingRight="@dimen/activity_horizontal_margin" 9 android:paddingTop="@dimen/activity_vertical_margin" 10 tools:context="com.example.sqlitedemo.MainActivity" > 11 12 <TextView 13 android:layout_width="wrap_content" 14 android:layout_height="wrap_content" 15 android:text="@string/hello_world" /> 16 17 <Button 18 android:layout_width="fill_parent" 19 android:layout_height="wrap_content" 20 android:onClick="insert" 21 android:text="insert" /> 22 23 <Button 24 android:layout_width="fill_parent" 25 android:layout_height="wrap_content" 26 android:onClick="delete" 27 android:text="delete" /> 28 29 <Button 30 android:layout_width="fill_parent" 31 android:layout_height="wrap_content" 32 android:onClick="update" 33 android:text="update" /> 34 35 <Button 36 android:layout_width="fill_parent" 37 android:layout_height="wrap_content" 38 android:onClick="query" 39 android:text="query" /> 40 41 </LinearLayout>activity_main.xml
增删改查界面:
006_01SQLite_demo
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热心网友 时间:2022-04-07 19:52
1)下载sqlite源代码,并解压到工程中[这步不需要了,cocos2dx中已经加入了sqlite,只需引用头文件sqlite3.h就可以了]: