Android实现搜索保存历史记录功能

本文实例为大家分享了android搜索保存历史记录功能，供大家参考，具体内容如下

要点：就是缓存输入的内容到 本地 下面就是实现保存 搜索内容到本地 和 清空本地历史的方法

//保存搜索内容到本地 
public void save() { 
  string text = mkeywordet.gettext().tostring(); 
  string oldtext = msharepreference.getstring(search_history, ""); 
  stringbuilder builder = new stringbuilder(text); 
  builder.append("," + oldtext); 
  if (!textutils.isempty(text) && !oldtext.contains(text + ",")) { 
    sharedpreferences.editor myeditor = msharepreference.edit(); 
    myeditor.putstring(search_history, builder.tostring()); 
    myeditor.commit(); 
  } 
  updatedata(); 
} 
  
  
//清空本地历史 
public void cleanhistory() { 
  sharedpreferences.editor editor = msharepreference.edit(); 
  editor.clear(); 
  editor.commit(); 
  updatedata(); 
  msearchhistoryll.setvisibility(view.gone); 
  singletoast.show(this, getstring(r.string.clear_history_success), toast.length_short); 
} 

activity

import android.content.sharedpreferences; 
import android.os.bundle; 
import android.text.editable; 
import android.text.textutils; 
import android.text.textwatcher; 
import android.view.view; 
import android.widget.adapterview; 
import android.widget.arrayadapter; 
import android.widget.edittext; 
import android.widget.imageview; 
import android.widget.linearlayout; 
import android.widget.listview; 
import android.widget.textview; 
import android.widget.toast; 
 
 
import com.ccvideo.r; 
import com.yizhibo.video.adapter.searchadapter; 
import com.yizhibo.video.app.yzbapplication; 
import com.yizhibo.video.base.baselistactivity; 
import com.yizhibo.video.utils.constants; 
import com.yizhibo.video.utils.singletoast; 
import com.yizhibo.video.utils.utils; 
 
 
public class searchlistactivity extends baselistactivity implements view.onclicklistener { 
  public static final string extra_key_type = "extra_key_type"; 
  private static final string pre_search_history = "pre_search_history"; 
  private static final string search_history = "search_history"; 
 
 
  private edittext mkeywordet; 
  private textview moperationtv; 
  private arrayadapter<string> marradapter; 
  private sharedpreferences msharepreference; 
 
 
  private linearlayout msearchhistoryll; 
   private list<string> mhistorykeywords; 
  private listview mlistview; 
  @override 
  protected void oncreate(bundle savedinstancestate) { 
    super.oncreate(savedinstancestate); 
    msharepreference = yzbapplication.getapp().getsharedpreferences(pre_search_history, 0); 
    setcontentview(r.layout.activity_search_list); 
    mkeywordet = (edittext) findviewbyid(r.id.tab_bar_keyword_et); 
mhistorykeywords = new arraylist<string>(); 
 
    mkeywordet.addtextchangedlistener(new textwatcher() { 
      @override 
      public void beforetextchanged(charsequence s, int start, int count, int after) { 
 
 
      } 
 
 
      @override 
      public void ontextchanged(charsequence s, int start, int before, int count) { 
        if (s.length() == 0) { 
          madapter.clear(); 
          madapter.notifydatasetchanged(); 
          moperationtv.settext(r.string.cancel); 
          memptyview.hide(); 
          clearkeywordiv.setvisibility(view.gone); 
          if (mhistorykeywords.size() > 0) { 
            msearchhistoryll.setvisibility(view.visible); 
          } else { 
            msearchhistoryll.setvisibility(view.gone); 
          } 
        } else { 
          msearchhistoryll.setvisibility(view.gone); 
          moperationtv.settext(r.string.search); 
          clearkeywordiv.setvisibility(view.visible); 
        } 
      } 
 
 
      @override 
      public void aftertextchanged(editable s) { 
 
 
      } 
    }); 
    mkeywordet.requestfocus(); 
    moperationtv = (textview) findviewbyid(r.id.tab_bar_cancel_tv); 
    moperationtv.setonclicklistener(new view.onclicklistener() { 
      @override 
      public void onclick(view v) { 
        if (mkeywordet.gettext().length() > 0) { 
          hideinputmethod(); 
          save(); 
        } else { 
          finish(); 
        } 
      } 
    }); 
    initsearchhistory(); 
     
  } 
 
  public void initsearchhistory() { 
    msearchhistoryll = (linearlayout) findviewbyid(r.id.search_history_ll); 
    listview listview = (listview) findviewbyid(r.id.search_history_lv); 
    findviewbyid(r.id.clear_history_btn).setonclicklistener(this); 
    string history = mpref.getstring(preferences.key_search_history_keyword); 
    if (!textutils.isempty(history)){ 
      list<string> list = new arraylist<string>(); 
      for(object o : history.split(",")) { 
        list.add((string)o); 
      } 
      mhistorykeywords = list; 
    } 
    if (mhistorykeywords.size() > 0) { 
      msearchhistoryll.setvisibility(view.visible); 
    } else { 
      msearchhistoryll.setvisibility(view.gone); 
    } 
    marradapter = new arrayadapter<string>(this, r.layout.item_search_history, mhistorykeywords); 
    listview.setadapter(marradapter); 
    listview.setonitemclicklistener(new adapterview.onitemclicklistener() { 
      @override 
      public void onitemclick(adapterview<?> adapterview, view view, int i, long l) { 
        mkeywordet.settext(mhistorykeywords.get(i)); 
        msearchhistoryll.setvisibility(view.gone); 
      } 
    }); 
    marradapter.notifydatasetchanged(); 
  } 
 
  public void save() { 
    string text = mkeywordet.gettext().tostring(); 
    string oldtext = mpref.getstring(preferences.key_search_history_keyword); 
    if (!textutils.isempty(text) && !oldtext.contains(text)) { 
      mpref.putstring(preferences.key_search_history_keyword, text + "," + oldtext); 
      mhistorykeywords.add(0,text); 
    } 
    marradapter.notifydatasetchanged(); 
  } 
 
 
 public void cleanhistory() { 
    mpref.remove(preferences.key_search_history_keyword); 
    mhistorykeywords.clear(); 
    marradapter.notifydatasetchanged(); 
    msearchhistoryll.setvisibility(view.gone); 
    singletoast.show(this, getstring(r.string.clear_history_success), toast.length_short); 
  } 
  public void updatedata(){ 
    string history = msharepreference.getstring(search_history, ""); 
    mhistoryarr = history.split(","); 
    marradapter = new arrayadapter<string>(this, 
        r.layout.activity_searchhistory, mhistoryarr); 
    mlistview.setadapter(marradapter); 
    marradapter.notifydatasetchanged(); 
  } 
 
 
  @override 
  public void onclick(view view) { 
    switch (view.getid()) { 
      case r.id.clear_history_btn: 
        cleanhistory(); 
        break; 
    } 
  } 
} 

下拉弹出layout布局

<linearlayout 
    android:id="@+id/search_history_ll" 
    android:orientation="vertical" 
    android:layout_width="match_parent" 
    android:layout_below="@id/global_search_action_bar_rl" 
    android:layout_height="wrap_content"> 
    <textview 
      android:id="@+id/contenttextview" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textsize="@dimen/text_size_title_h2" 
      android:text="@string/search_history" 
      android:paddingleft="10dp" 
      android:textcolor="@color/text_gray"/> 
    <listview 
      android:id="@+id/search_history_lv" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:cachecolorhint="@android:color/transparent" 
      android:listselector="@drawable/list_item_selector"> 
    </listview> 
    <button 
      android:id="@+id/clear_history_btn" 
      android:layout_width="210dp" 
      android:layout_height="@dimen/button_common_height" 
      android:layout_below="@id/rise_crash_ll" 
      android:layout_margintop="5dp" 
      android:textcolor="@color/text_btn_selector" 
      android:layout_gravity="center" 
      android:textsize="@dimen/text_size_title_h2" 
      android:layout_centerhorizontal="true" 
      android:text="@string/clear_search_history" 
      android:background="@drawable/round_btn_selector" 
      style="?android:buttonbarbuttonstyle"/> 
  </linearlayout> 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。