????3).???????汾?仯??????diary????????′?????diary???

????publicclass DBHelper extends SQLiteOpenHelper{

????public final static String DATABASENAME ="diaryOpenHelper.db";

????public final static int DATABASEVERSION =1;

????//?????????

????public DBHelper(Context context??Stringname??CursorFactory factory??int version)

????{

????super(context?? name?? factory??version);

 ????}

????//???????????????

????public void onCreate(SQLiteDatabase db)

????{

????String sql ="create tablediary"+

????"("+

????"_idinteger primary key autoincrement??"+

????"topicvarchar(100)??"+

????"contentvarchar(1000)"+

????")";

????db.execSQL(sql);

????}

????//???????汾?и??￡??????????

????public void onUpgrade(SQLiteDatabasedb??int oldVersion??int newVersion)

????{

????String sql = "drop table ifexists diary";

????db.execSQL(sql);

????this.onCreate(db);

????}

????}

????37. ?????????ProgressBar???progressBar????????д?????10????????????????????????(10??)??

????publicclass ProgressBarStu extends Activity {

????private ProgressBar progressBar = null;

????protected void onCreate(BundlesavedInstanceState) {

????super.onCreate(savedInstanceState);

????setContentView(R.layout.progressbar);

????//??????????

????progressBar = (ProgressBar)findViewById(R.id.progressBar);

????Thread thread = new Thread(newRunnable() {

????@Override

????public void run() {

????int progressBarMax =progressBar.getMax();

????try {

????while(progressBarMax!=progressBar.getProgress())

????{

????intstepProgress = progressBarMax/10;

????intcurrentprogress = progressBar.getProgress();

????progressBar.setProgress(currentprogress+stepProgress);

????Thread.sleep(1000);

????}

????} catch(InterruptedException e) {

????// TODO Auto-generatedcatch block

????e.printStackTrace();

????}

????}

????});

????thread.start();

????//???????

????}

????}