通讯录搜索功能
2015-06-30 15:04
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refresh_list.xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent"><EditText android:id="@+id/txt_input" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <ListView android:id="@+id/list1" android:layout_width="fill_parent" android:layout_height="fill_parent" /></LinearLayout>
package com.joyband.android; import java.util.ArrayList; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.text.Editable; import android.text.TextWatcher; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.ListView; import android.widget.Toast; /** * @author iampy * */ public class RefreshListByEditText extends Activity implements OnItemClickListener { private static final String TAG = "====RefreshListByEditText_TAG===="; private EditText input; private ListView listView; private String[] listValue = { "Java", "JavaSE", "JavaEE", "Oracle 8", "Oracle 9i", "Oracle 10g" }; private ArrayAdapter<String> adapter; private Handler handler; private static final int MSG_KEY = 0x1234; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.refresh_list); input = (EditText) findViewById(R.id.txt_input); input.addTextChangedListener(new TextWatcher() { public void afterTextChanged(Editable editer) { Log.d(TAG, "afterTextChanged"); } public void beforeTextChanged(CharSequence value, int arg0, int arg1, int arg2) { Log.d(TAG, "beforeTextChanged"); } public void onTextChanged(CharSequence value, int arg0, int arg1, int arg2) { Log.d(TAG, "onTextChanged"); Log.w(TAG, "input.text=" + value.toString()); Message msg = new Message(); msg.what = MSG_KEY; Bundle data = new Bundle(); data.putString("value", value.toString()); msg.setData(data); handler.sendMessage(msg); } }); listView = (ListView) findViewById(R.id.list1); adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, listValue); listView.setAdapter(adapter); listView.setOnItemClickListener(this); handler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case MSG_KEY: refreshListView(msg.getData().get("value").toString()); } } }; } private void refreshListView(String value) { if (value == null || value.trim().length() == 0){ adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, listValue); listView.setAdapter(adapter); } ArrayList<String> tmpList = new ArrayList<String>(); for (String s : listValue) { if (s.indexOf(value) >= 0) { tmpList.add(s); } } if (tmpList.size() == 0) return; adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, tmpList); listView.setAdapter(adapter); listView.invalidateViews(); } public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Toast.makeText(this, "选择列表项:" + position, Toast.LENGTH_SHORT).show(); } @Override public boolean onCreateOptionsMenu(Menu menu) { menu.add(Menu.NONE, 1, 0, "刷新"); menu.add(Menu.NONE, 2, 0, "退出"); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case 1: input.setText(""); Message msg = new Message(); msg.what = MSG_KEY; Bundle data = new Bundle(); data.putString("value", ""); msg.setData(data); handler.sendMessage(msg); break; case 2: finish(); break; default: break; } return super.onOptionsItemSelected(item); } }
其中方法private void refreshListView(String value)中的if (tmpList.size() == 0) return;这一句有点问题,导致删除输入框的文字后不能刷新,这一句应该去掉,或者重新刷新整个列表
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