Android应用中怎么实现一个搜索记录保存功能

今天就跟大家聊聊有关Android应用中怎么实现一个搜索记录保存功能，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。

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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

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Android应用中怎么实现一个搜索记录保存功能

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