通过sqliteDatabase 来访问sqlite数据库

----Main.java

publicclassMainextendsActivity{
	sqliteDatabasedb;
	ListViewlistView;
	EditTexteditText1,editText2;//要添加的标题和context
	Buttonbutton;

	@Override
	protectedvoidonCreate(BundlesavedInstanceState){
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		listView=(ListView)findViewById(R.id.listView1);
		editText1=(EditText)findViewById(R.id.editText1);
		editText2=(EditText)findViewById(R.id.editText2);
		button=(Button)findViewById(R.id.button1);
		///data/data/com.example.dbtest/files--/my.db3
		db=sqliteDatabase.openOrCreateDatabase(this.getFilesDir().toString()
				+"/my.db3",null);
		button.setOnClickListener(newOnClickListener(){

			@Override
			publicvoidonClick(Viewv){
				Stringstr1=editText1.getText().toString();
				Stringstr2=editText2.getText().toString();
				try{
					insertToDB(db,str1,str2);
					Cursorcursor=db.rawQuery("select*fromnews_info",null);
					inflateListView(cursor);

				}catch(sqliteExceptione){
					db.execsql("createtablenews_info(_idintegerprimarykeyautoincrement,"
							+"news_titlevarchar(50),"
							+"news_contentvarchar(255))");
					insertToDB(db,str2);
					Cursorcursor=db.rawQuery("selecte*fromnews_info",null);
					inflateListView(cursor);
				}

			}
		});

	}

	privatevoidinsertToDB(sqliteDatabasedb,Stringstr1,Stringstr2){
		db.execsql("insertintonews_infovalues(null,?,?)",newString[]{
				str1,str2});
	}

	privatevoidinflateListView(Cursorcursor){
		SimpleCursorAdapteradapter=newSimpleCursorAdapter(Main.this,R.layout.item,cursor,newString[]{"news_title","news_content"},newint[]{R.id.textView1,R.id.textView2},CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
		listView.setAdapter(adapter);
	}
	@Override
	protectedvoidonDestroy(){
		super.onDestroy();
		if(db!=null&&db.isOpen()){
			db.close();
		}
	}
}

SimpleCursorAdapter封装Cursor时，要求数据表的主键列的列名为 _id 。因为SimpleCursorAdapter只能识别 列名为

_id的主键。否则会报错。

同java中的操作JDBC一样，数据库最后也要关闭 db.close(); 来回收资源。

---main.xml

<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}">

<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:ems="10">

<requestFocus/>
</EditText>

<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/editText1"
android:ems="10"/>

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/editText2"
android:text="插入数据"/>

<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/button1">

</ListView>

</RelativeLayout>

listeview 每个子项的布局文件 item.xml:

<?xmlversion="1.0"encoding="utf-8"?>
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="TextView"/>

<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="20dp"
android:layout_toRightOf="@+id/textView1"
android:text="TextView"/>

</RelativeLayout>

运行效果：