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;@Overrideprotected 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());mit();}updateData();}//清空本地历史public void cleanHistory() {SharedPreferences.Editor editor = mSharePreference.edit();editor.clear();mit();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
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
<LinearLayoutandroid: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"><TextViewandroid: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"/><ListViewandroid: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><Buttonandroid: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 video.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;@Overrideprotected 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() {@Overridepublic void beforeTextChanged(CharSequence s, int start, int count, int after) {}@Overridepublic 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);}}@Overridepublic void afterTextChanged(Editable s) {}});mKeywordEt.requestFocus();mOperationTv = (TextView) findViewById(R.id.tab_bar_cancel_tv);mOperationTv.setOnClickListener(new View.OnClickListener() {@Overridepublic 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() {@Overridepublic 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();}@Overridepublic void onClick(View view) {switch (view.getId()) {case R.id.clear_history_btn:cleanHistory();break;}}}
之前的这个demo里面少了share commit的操作，导致会有搜索记录没有去重的问题，已经更新。附上新的源码下载地址源码demo ，同时谢谢ysc123shift同学的善意提醒！做技术互相帮助和分享很重要。谢谢！
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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