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 mArrAdapter; 
  private SharedPreferences mSharePreference; 
 
 
  private LinearLayout mSearchHistoryLl; 
   private List 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(); 
 
    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 list = new ArrayList(); 
      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(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(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

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考高分网。