搜索保存历史记录功能_移动开发_编程开发_程序员俱乐部

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

class="brush:java;gutter:true;">//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>