在 android dialog中使用Autocompletetext
浏览数：36 /
时间：2015年06月11日
我想再android Dialog中使用 autocompletetext, 在开发测试过程中碰见不少问题，把最后的成品发布出来，避免大家走弯路，下面的代码是完整代码
详细代码如下
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import android.app.Activity;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.text.Editable;import android.text.TextWatcher;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;import android.widget.Button;import android.widget.EditText;import android.widget.ListView;public class MainActivity extends Activity { private static Context context; Button okButton; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final View addView = getLayoutInflater().inflate(R.layout.activity_main, null); context = this.getApplicationContext(); Button search = (Button)findViewById(R.id.btn_save); search.setOnClickListener(showSearch); } private OnClickListener showSearch = new OnClickListener() { public void onClick(View v) { showDialogList(); } }; public static Context getAppContext() { return MainActivity.context; } static final String[] COUNTRIES = new String[] { "Afghanistan", "Albania", "Algeria", "American Samoa", "Andorra", "Angola", "Anguilla", "Antarctica", "Antigua and Barbuda", "Argentina","Armenia", "Aruba", "Australia", "Austria", "Azerbaijan", "Bahrain", "Bangladesh", "Barbados", "Belarus", "Belgium" }; private void showDialogList() { final Dialog dialog = new Dialog(this); View view = getLayoutInflater().inflate(R.layout.citylistview,null); ListView lv = (ListView) view.findViewById(R.id.List); final ArrayAdapter<String> adapter= new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, COUNTRIES); lv.setAdapter(adapter); AutoCompleteTextView filterText = (AutoCompleteTextView ) view.findViewById(R.id.EditBox); filterText.setAdapter(adapter); dialog.setContentView(view); dialog.setCancelable(true); Window window = dialog.getWindow(); window.setGravity(Gravity.CENTER); lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { } }); dialog.show(); filterText.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { // TODO Auto-generated method stub } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { // TODO Auto-generated method stub } @Override public void afterTextChanged(Editable s) { adapter.getFilter().filter(s); } }); }} |
citylistview.xml
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <AutoCompleteTextView android:id="@+id/EditBox" android:layout_width="wrap_content" android:layout_height="wrap_content" > </AutoCompleteTextView> <ListView android:id="@+id/List" android:layout_width="match_parent" android:layout_height="wrap_content" > </ListView></LinearLayout> |
CityListDialog.java
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public class CityListDialog extends Dialog implements OnClickListener {private ListView list;private EditText filterText = null;ArrayAdapter<String> adapter = null;private static final String TAG = "CityList";public CityListDialog(Context context, String[] cityList) { super(context); setContentView(R.layout.citylistview); this.setTitle("Select City"); filterText = (EditText) findViewById(R.id.EditBox); filterText.addTextChangedListener(filterTextWatcher); list = (ListView) findViewById(R.id.List); adapter = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, cityList); list.setAdapter(adapter); list.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> a, View v, int position, long id) { Log.d(TAG, "Selected Item is = "+list.getItemAtPosition(position)); } });}public void onClick(View v) {}private TextWatcher filterTextWatcher = new TextWatcher() { public void afterTextChanged(Editable s) { } public void beforeTextChanged(CharSequence s, int start, int count,int after) { } public void onTextChanged(CharSequence s, int start, int before,int count) { adapter.getFilter().filter(s); }};@Overridepublic void onStop(){ filterText.removeTextChangedListener(filterTextWatcher);}} |
AutoCompleteTextView组件是一个可编辑的文本视图，能显示用户键入的相关信息。建议列表显示一个下拉菜单，用户可以从中选择一项，以完成输入。建议列表是从一个数据适配器获取的数据。它有3个重要的方法。
? clearListSelection()：清除选中的列表项。
? dismissDropDown()：如果存在关闭下拉菜单。
? getAdapter()：获取适配器。
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