通过listview
我正在尝试在我的应用的操作栏中创建搜索视图，该搜索视图将在应用中的列表视图上执行搜索（即将根据键入的字母显示列表视图中的项目名称）。 Listview使用listadapter类。当我在搜索视图中输入文本时，没有任何反应。我对搜索视图很新，试图使用从网上获得的代码，但这没有帮助。 :(你能告诉我如何做到这一点吗？我应该为它创建另一个类吗？
这是我的代码：
ListAdapter.java
public class ListAdapter extends BaseAdapter{
Vector listData = null;
public void setData(Vector data) {
listData = data;
}
private Context _context;
private List<String> list;
ViewHolder holder=null;
View row=null;
public ListAdapter(Context _context,List<String> list)
{
this._context=_context;
this.list=list;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return list.get(arg0);
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
private static class ViewHolder
{
public TextView textView;
public ViewHolder(View row) {
// TODO Auto-generated constructor stub
textView = (TextView) row.findViewById(R.id.rowTextView);
}
}
@Override
public View getView(int position, View convertView, ViewGroup viewGroup) {
// TODO Auto-generated method stub
row=convertView;
holder=null;
try{
if(row==null)
{
LayoutInflater inflater = (LayoutInflater) _context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.simplerow, viewGroup, false);
holder=new ViewHolder(row);
row.setTag(holder);
Log.d("newrow", "New row");
/*/View row = convertView;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) _context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.simplerow, viewGroup, false);
}
TextView textView = (TextView) row.findViewById(R.id.rowTextView);*/
holder.textView.setText(list.get(position).toString());
}
else
{
holder= (ViewHolder) row.getTag();
Log.d("recycle", "Recycling stuff");
}
}
catch(Exception e)
{
e.printStackTrace();
}
try
{
if(row!=null)
{
if(position==MainActivity.selected_item)
{
row.setBackgroundColor(Color.RED);
}
else
{
row.setBackgroundColor(Color.BLACK);
}
}
}
catch(Exception e)
{
}
return row;
}
public Filter getFilter() {
// TODO Auto-generated method stub
return null;
}
}
MainActivity.java
public class MainActivity extends Activity implements View.OnClickListener, OnCompletionListener {
ListView list;
ArrayAdapter<String> adapter ;
ListAdapter listAdapter;
ArrayList<String> listTest;
ArrayList<String> listSoundNames;
ImageButton play,stop,back,next;
String songpath,song,title;
int index,current_position;
File[] listFile;
SharedPreferences sharedPref;
MediaPlayer mp,mp2;
ActionBar bar;
private Boolean state=false;
private static int save = -1;
int count=0;
private static final String TAG = MainActivity.class.getSimpleName();
private Context _context = this;
public static int selected_item=-1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sharedPref = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
song = sharedPref.getString("songname", "name");
mp=new MediaPlayer();
mp2 = new MediaPlayer();
mp.setOnCompletionListener(this);
list = (ListView)findViewById(R.id.list);
//list.setTextFilterEnabled(true);
list.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
_context=this;
adapter = new ArrayAdapter<String>(_context,R.layout.simplerow, listSoundNames);
listTest = new ArrayList<String>( );
listSoundNames=new ArrayList<String>();
play = (ImageButton)findViewById(R.id.play);
back = (ImageButton)findViewById(R.id.prev);
next = (ImageButton)findViewById(R.id.next);
//adding listeners
play.setOnClickListener(this);
back.setOnClickListener(this);
next.setOnClickListener(this);
//action bar controls
bar = getActionBar();
bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#DF0174")));
//bar.setIcon(new ColorDrawable(getResources().getColor(android.R.color.transparent)));
EditText editText = new EditText(getApplicationContext());
getActionBar().setCustomView(editText);
//bar.setDisplayShowTitleEnabled(true);
//bar.setDisplayHomeAsUpEnabled(true);
Scanner("/sdcard/");//storage path
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////*Adding listener to songs*//////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////
if(listTest.size() != 0)
{
//listAdapter = new ArrayAdapter<String> (MainActivity.this,R.layout.simplerow, listSoundNames);
listAdapter=new ListAdapter(_context,listSoundNames);
list.setAdapter(listAdapter);
list.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
//////////////////changing list item background on click///////////////////
//list.setSelection(position);
view.setSelected(true);
///////////////////PROBLEM/////////////
for(int a = 0; a < parent.getChildCount(); a++)
{
list.clearChoices();
parent.getChildAt(a).setBackgroundColor(Color.BLACK);
}
selected_item=position;
// view.setBackgroundColor(Color.RED);
////////////////////////////////////////////////////////////////////////////
//accessing song path
String selected = listTest.get(position);
list.setItemChecked(position, true);
list.setSelection(position);
//accessing the song name
String name = (String) ((TextView) view).getText();
title = name;
//bar.setTitle(title);
//Log.e(TAG, name);
Toast.makeText(getApplicationContext(), name, Toast.LENGTH_SHORT).show();
try{
mp.reset();
mp.setDataSource(listTest.get(position));//source
mp.prepare();
mp.start();
index = position;
play.setImageResource(R.drawable.pause);
}
catch(Exception e){e.printStackTrace();}
}
});
}
}
////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////*Songs added here to list*////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////
private void Scanner(String path) {
// TODO Auto-generated method stub
{
try
{
File fl = new File(path);
File[] listOfFiles = fl.listFiles();
for (File listOfFile : listOfFiles)
{
String s = listOfFile.getName();
if(s.endsWith(".mp3"))
{
songpath = listOfFile.getPath();
listTest.add(songpath);//adding song names to list
//listTest.toString().replaceFirst(songpath, s);
// store file name in listSoundNames
int pos = s.lastIndexOf(".");
if (pos > 0)
{
song = s.substring(0, pos);
}
listSoundNames.add(song);
}
/////////////////////////////////
File f = new File(path+s+"/");
if (f.exists() && f.isDirectory()) {
Scanner(path+s+"/");
}
////////////////////////////////
}
}
catch (Exception e) { }
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (v.equals(play))
{
if(mp.isPlaying())
{
mp.pause();
Toast.makeText(MainActivity.this, "paused", Toast.LENGTH_SHORT).show();
//change in button image//
play.setImageResource(R.drawable.play);
}
else
{
mp.start();
Toast.makeText(MainActivity.this, "started", Toast.LENGTH_SHORT).show();
//change in button image//
play.setImageResource(R.drawable.pause);
//
}
}
if (v.equals(back))
{
mp.stop();
mp.reset();
//bar.setTitle(song);
if(index!=0)
{
index = index -1;
}
else
{
index = (list.getAdapter().getCount()-1)-1;
}
Uri uri = Uri.parse(listTest.get(index).toString());//getting the path of next song
try {
mp.setDataSource(getApplicationContext(), uri);//setting new data source
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Toast.makeText(MainActivity.this, "ERROR", Toast.LENGTH_SHORT).show();///PROBLEM:MOVING HERE AFTER CLICKING NEXT BUTTON
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
mp.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mp.start();//PROBLEM: NOT PLAYING
Toast.makeText(MainActivity.this, ""+uri, Toast.LENGTH_SHORT).show();
}
if (v.equals(next))
{
mp.stop();
mp.reset();
index = index +1;
Uri uri = Uri.parse(listTest.get(index).toString());//getting the path of next song
try {
mp.setDataSource(getApplicationContext(), uri);//setting new data source
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Toast.makeText(MainActivity.this, "ERROR", Toast.LENGTH_SHORT).show();///PROBLEM:MOVING HERE AFTER CLICKING NEXT BUTTON
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
mp.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mp.start();//PROBLEM: NOT PLAYING
Toast.makeText(MainActivity.this, ""+uri, Toast.LENGTH_SHORT).show();
}
}
@Override
public void onCompletion(MediaPlayer arg0) {
// TODO Auto-generated method stub
play.setImageResource(R.drawable.play);
}
/*@Override
protected void onStop() {
super.onStop();
mp.stop();
Toast.makeText(getApplicationContext(), "stopped", Toast.LENGTH_LONG).show();
}*/
//////////////////////////////////////////Search box/////////////////////////////////////////////////////
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
searchView.setIconifiedByDefault(false);
searchView.setQueryHint(Html.fromHtml(("<font color = #ffffff>"+"Listen Now"+"</font>")));
SearchView.OnQueryTextListener textChangeListener = new SearchView.OnQueryTextListener()
{
@Override
public boolean onQueryTextChange(String newText)
{
// this is your adapter that will be filtered
//listAdapter.getFilter().filter(newText);
Toast.makeText(getApplicationContext(), "type"+newText, Toast.LENGTH_SHORT).show();
return true;
}
@Override
public boolean onQueryTextSubmit(String query)
{
// this is your adapter that will be filtered
//((Filterable) listAdapter).getFilter().filter(query);
//listAdapter.getFilter().filter(query);
Toast.makeText(getApplicationContext(), query, Toast.LENGTH_SHORT).show();
/* try
{
File fl = new File("/sdcard/");
File[] listOfFiles = fl.listFiles();
String selectedPath="";
for (File listOfFile : listOfFiles)
{
String s = listOfFile.getName();
if(s.equalsIgnoreCase(query) && s.endsWith(".mp3"))
{
selectedPath= listOfFile.getPath();//not receiving the path:PROBLEM:HOLDING THE POSITION FOR LIST ITEM
//listTest.add(songpath);//adding song names to list
//listTest.toString().replaceFirst(songpath, s);
Toast.makeText(getApplicationContext(), listOfFile.getPath(), Toast.LENGTH_SHORT).show();
/*mp.setDataSource(selectedPath);
mp.prepare();
mp.start();
}
/////////////////////////////////
File f = new File("/sdcard/"+s+"/");
if (f.exists() && f.isDirectory()) {
Scanner("/sdcard/"+s+"/");
}
////////////////////////////////
}
}
catch (Exception e) { }*/
return true;
}
};
searchView.setOnQueryTextListener(textChangeListener);
return super.onCreateOptionsMenu(menu);
}
}
截图：
1 个答案:
答案 0 :(得分：0)
1）在layout.xml：
<android.support.v7.widget.SearchView
android:id="@+id/mSearchView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:searchIcon="@android:drawable/ic_menu_search"
app:defaultQueryHint="@string/search_hint"/>
2）在全局范围内声明SearchView searchView;（在每个函数之外）。
3）在您喜欢的任何函数/方法中设置布局窗口小部件searchView = (SearchView) view.findViewById(R.id.mSearchView);的引用，您可以在其中初始化视图。
4）然后将此代码添加到您喜欢的任何函数/方法中：
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
// your code when you submit your search
return true;
}
@Override
public boolean onQueryTextChange(String newText) {
// your code when you type on your searchview
return true;
}
});
这是实施searchView的方法。
相关问题
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？