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我们。