android 實現 搜尋儲存歷史記錄功能
阿新 • • 發佈：2019-01-03
大家應該做這個功能 首先想到的是用AutoCompleteTextView 這個控制元件非常好用 ，而且程式碼寫起來也是非常簡單 而且還是自動匹配提示
程式碼實現：
<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); } }
這樣就可以實現簡單的 搜尋歷史匹配 我們要做的 其實就是快取輸入的內容到 本地 下面就是實現儲存 搜尋內容到本地 和 清空本地歷史的 方法
//儲存搜尋內容到本地
<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(); } //清空本地歷史 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 還有一個小問題 預設是從第二個字元開始匹配的
如果設定輸入第一個字元就進行提示 加入下面這行程式碼autotext.setThreshold(1);
上面大概介紹了一下AutoCompleteTextView這個控制元件。但是我們的專案要做的是 顯示出所有搜尋的歷史記錄 效果圖是這樣的
想了一下 用 AutoCompleteTextView 不太合適 決定自己用listView 實現 話不多說 直接上程式碼
下拉彈出layout佈局
<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 的程式碼 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; } } }
之前的這個demo裡面少了share commit的操作，導致會有搜尋記錄沒有去重的問題，已經更新。附上新的原始碼下載地址 原始碼demo ，同時謝謝ysc123shift同學的善意提醒！做技術互相幫助和分享很重要。謝謝！
效果圖就是上面的圖片。希望能幫到大家。 歡迎大家加入我的qq 群：454430053。