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
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;
}
}
}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！
本文参与 腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。
原始发表：2015-12-29，如有侵权请联系 cloudcommunity@tencent.com 删除
评论
登录后参与评论
推荐阅读
目录
腾讯云开发者
