參考《瘋狂android講義》8.4節P424

1、獲取SQLiteDatabase實例有2種方法，一是直接new SQLiteDatabase(),另一種使用SQLiteHelper。一般建議使用后者。

使用SQLiteHelper插入數據的一般步驟：

package com.ljh.sqllitehelperdemo.helper;import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteDatabase.CursorFactory; import android.database.sqlite.SQLiteOpenHelper;public class DatabaseHelper extends SQLiteOpenHelper {final private String CREATE_TABLE_SQL = "create table dict(_id integer primary key autoincrement, word, detail)";public DatabaseHelper(Context context, String name, CursorFactory factory,int version) {super(context, name, factory, version);}//1、創建SQLiteOpenHelper的子類，并重寫onCreate及onUpgrade方法。@Overridepublic void onCreate(SQLiteDatabase db) {db.execSQL(CREATE_TABLE_SQL);}@Overridepublic void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {}}
package com.ljh.sqllitehelperdemo;import com.ljh.sqllitehelperdemo.helper.DatabaseHelper;import android.os.Bundle; import android.app.Activity; import android.database.sqlite.SQLiteDatabase; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast;public class MainActivity extends Activity {private EditText etWord = null;private EditText etDetail = null;private EditText etSearchWord= null;private TextView tvDetail = null;private Button btInsert = null;private Button btSearch = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);etWord = (EditText) findViewById(R.id.et_word);etDetail = (EditText) findViewById(R.id.et_detail);etSearchWord = (EditText) findViewById(R.id.et_search_content);tvDetail = (TextView) findViewById(R.id.tv_detail);btInsert = (Button) findViewById(R.id.bt_insert);btSearch = (Button) findViewById(R.id.bt_search);//2、獲取SQLiteOpenHelper的實例，并由此獲取SQLiteDatabase實例。DatabaseHelper helper = new DatabaseHelper(this, this.getFilesDir()+"dict.db3",null,1);final SQLiteDatabase db = helper.getWritableDatabase();btInsert.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {String word = etWord.getText().toString();String detail = etDetail.getText().toString();insertData(db, word,detail);Toast.makeText(MainActivity.this, "插入數據成功", Toast.LENGTH_LONG).show();}});}private void insertData(SQLiteDatabase db, String word, String detail){//4、執行SQL語句。db.execSQL("insert into dict(word, detail) values(?,?)", new String[]{word,detail});} }

總結

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