Android 是一种基于 Linux 的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由 Google 公司和开放手机联盟领导及开发。尚未有统一中文名称,中国大陆地区较多人使用 "安卓" 或 "安致"。
这篇文章主要介绍了 Android 实现搜索保存历史记录功能,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
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
- //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>
来源: http://www.phperz.com/article/17/0828/337675.html