Android应用中怎么实现一个搜索记录保存功能
今天就跟大家聊聊有关Android应用中怎么实现一个搜索记录保存功能，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
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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 mArrAdapter;
private SharedPreferences mSharePreference;
private LinearLayout mSearchHistoryLl;
private List 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();
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 list = new ArrayList();
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(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(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
看完上述内容，你们对Android应用中怎么实现一个搜索记录保存功能有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。
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