android 实现搜索保存历史记录功能

大家应该做这个功能首先想到的是用AutoCompleteTextView 这个控件非常好用，而且代码写起来也是非常简单而且还是自动匹配提示

具体实现方法：

代码实现：

<AutoCompleteTextView     android:layout_width="match_parent"    android:layout_height="wrap_content"    android:id="@+id/autotext"    />public class MainActivity extends Activity {private AutoCompleteTextView autotext;private ArrayAdapter<String> arrayAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.test);        autotext =(AutoCompleteTextView) findViewById(R.id.autotext);        String [] arr={"aa","aab","aac"};        arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,arr);        autotext.setAdapter(arrayAdapter);    }}

这样就可以实现简单的搜索历史匹配我们要做的其实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

<pre name="code" class="java">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);}

Ps:AutoCompleteTextView 还有一个小问题默认是从第二个字符开始匹配的
如果设置输入第一个字符就进行提示加入下面这行代码autotext.setThreshold(1);
上面大概介绍了一下AutoCompleteTextView这个控件。但是我们的项目要做的是显示出所有搜索的历史记录效果图是这样的

android 实现搜索保存历史记录功能_第1张图片

想了一下用 AutoCompleteTextView 不太合适决定自己用listView 实现话不多说直接上代码
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>activity 的代码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;        }    }}

附上源码下载地址源码Demo

效果图就是上面的图片。希望能帮到大家。欢迎大家加入我的qq 群：454430053。

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