android 实现 搜索保存历史记录功能

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) {

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f (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();

}