Android: Control Autocompletetextview Client Save search History auto Prompt

<?XML version= "1.0" encoding= "Utf-8"?><LinearLayoutXmlns:android= "Http://schemas.android.com/apk/res/android"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:orientation= "Vertical"><LinearLayoutAndroid:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:orientation= "Horizontal"><AutocompletetextviewAndroid:id= "@+id/auto"Android:layout_width= "0DP"Android:layout_height= "Wrap_content"Android:layout_weight= "1"Android:completionhint= "Last 5 records"Android:completionthreshold= "1"/><ButtonAndroid:id= "@+id/search"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "Search"/></LinearLayout><LinearLayoutAndroid:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:orientation= "Vertical"> <button android:id= "@+id/clean"  Android:layout_width= "Match_parent"  Android:layout_height= "Wrap_ Content " Android:text Android:onclick=" Cleanhistory "/> </linearlayout ></ Linearlayout>          

PublicClass TestactivityExtendsActivity {PrivateAutocompletetextview Auto;PrivateButton searchbtn;Private arrayadapter<string>Arr_adapter; @OverrideProtectedvoidOnCreate (Bundle savedinstancestate) {Super. OnCreate (Savedinstancestate); Setcontentview (r.layout.test);//Initialize auto =(Autocompletetextview) Findviewbyid (R.id.auto); SEARCHBTN =(Button) Findviewbyid (R.id.search);//Get Search Record file contents Sharedpreferences SP = getsharedpreferences ("Search_history", 0); String history = sp.getstring ("Historical", "No search record temporarily");//Returns an array of contents with a comma string[] History_arr = History.split (",");//New adapter, adapter data for Search history file Content Arr_adapter =New Arrayadapter<string> (ThisAndroid. R.layout.simple_dropdown_item_1line, History_arr);//Retain the first 50 dataif (History_arr.length > 50) {string[] newarrays =New STRING[50];//Implementing replication between Arrays System.arraycopy (History_arr, 0, newarrays, 0, 50); Arr_adapter =New Arrayadapter<string> (ThisAndroid. R.layout.simple_dropdown_item_1line, History_arr); }//Setting up the adapterAuto.setadapter (Arr_adapter);//To set the Listener event, click Search to write the search term searchbtn.setonclicklistener (NewButton.onclicklistener () {@OverridePublicvoidOnClick (View v) {//TODO auto-generated Method StubSave (); } }); }PublicvoidSave () {//Get search box information String text =Auto.gettext (). toString (); Sharedpreferences MYSP = getsharedpreferences ("Search_history", 0); String old_text = mysp.getstring ("History", "No search record temporarily");//With stringbuilder.append additions, comma-separated StringBuilder builder = comma-friendly content readingNewStringBuilder (old_text); Builder.append (text + ",");//Determines whether the search content already exists in the history file, and does not repeat the additionif (!old_text.contains (text + ",") {Sharedpreferences.editor Myeditor =Mysp.edit (); Myeditor.putstring ("History", builder.tostring ()); Myeditor.commit (); Toast.maketext (This, text + "Add Success"else {Toast.maketext ( this, text + "already exists" // clear search record public void Cleanhistory (View v) {sharedpreferences sp =getsharedpreferences ("Search_ History ", 0); Sharedpreferences.editor editor=sp.edit (); Editor.clear (); Editor.commit (); Toast.maketext (this, "clear success" super.ondestroy ();}      

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Android: Control Autocompletetextview Client Save search History auto Prompt