SQLCipher的导入和基本使用

   SQLCipher是分为社区版和商业版，我这里现在只介绍社区版怎么使用：

   官网，里面可以看到应该导入什么依赖SQLCipher官网

      

import android.content.Context;import net.sqlcipher.database.SQLiteDatabase;import net.sqlcipher.database.SQLiteOpenHelper;public class MyDatabaseOpenHelper extends SQLiteOpenHelper {    public MyDatabaseOpenHelper(Context context) {        super(context, "chenye.db", null, 1);    }    @Override    public void onCreate(SQLiteDatabase db) {        db.execSQL("create table if not exists Person(_id Integer PRIMARY KEY AUTOINCREMENT,NAME varchar(32),AGE varchar(32))");    }    @Override    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {    }}

import android.content.ContentValues;import android.content.Context;import android.util.Log;import net.sqlcipher.Cursor;import net.sqlcipher.database.SQLiteDatabase;import java.util.ArrayList;import java.util.List;public class DbManager {    private static final String TAG = "cy===DbManager";    private SQLiteDatabase mDb;    private DbManager() {    }    private static final class Holder {        private static final DbManager INSTANCE = new DbManager();    }    public static DbManager getInstance() {        return Holder.INSTANCE;    }    public DbManager init(Context context) {        SQLiteDatabase.loadLibs(context);        MyDatabaseOpenHelper helper = new MyDatabaseOpenHelper(context);        mDb = helper.getWritableDatabase("YEDASHEN");        return this;    }    public boolean insert(List<Person> persons) {        boolean flag = true;        ContentValues values = new ContentValues();        for (Person person : persons) {            values.clear();            values.put("name", person.getName());            values.put("age", person.getAge());            long person1 = mDb.insert("Person", null, values);            flag = person1 > 0;        }        return flag;    }    public List<Person> query() {        List<Person> persons = new ArrayList<>();        Cursor cursor = mDb.rawQuery("select * from Person", null);        while (cursor.moveToNext()) {            Person person = new Person();            try {                person.setName(cursor.getString(cursor.getColumnIndex("NAME")));                person.setAge(cursor.getString(cursor.getColumnIndex("AGE")));                persons.add(person);            } catch (Exception e) {                Log.i(TAG, e.toString());            }        }        cursor.close();        return persons;    }}

import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.widget.Toast;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private static final String TAG = "cy===MainActivity";    private DbManager mDbManager;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mDbManager = DbManager.getInstance().init(this);        insertData();        query();    }    private void insertData() {        List<Person> persons = new ArrayList<>();        persons.add(new Person("CY", "25"));        persons.add(new Person("YL", "24"));        persons.add(new Person("HY", "24"));        if (mDbManager.insert(persons)) {            Toast.makeText(this, "插入数据成功", Toast.LENGTH_SHORT).show();        } else {            Toast.makeText(this, "插入数据失败", Toast.LENGTH_SHORT).show();        }    }    public void query() {        List<Person> persons = mDbManager.query();        Log.i(TAG, persons.toString());    }}