//保存搜索內(nèi)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); } 

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;     }   } } 

<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>