问题
I have a ListView. which of it's items are from custom CursorAdapter. I have created separate layout for ListView items which is a CardView. I have six TextViews on each card they are Database values. Now i have to put a EditText to filter the ListView items according to the text entered in EditText.
My Code is
layout with ListView is
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#1d4563">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView2"
android:layout_marginTop="40dp"
android:layout_centerHorizontal="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="number"
android:ems="10"
android:id="@+id/editText5"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:background="@drawable/bg_edit"
android:textColorHint="#d3d3d3"
android:hint="enter Serial Number to search" />
ListView items layout is
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android.support.v7.cardview="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android.support.v7.cardview:cardBackgroundColor="@color/primary_dark"
android:id="@+id/cardItems">
<android.support.v7.widget.CardView
android:id="@+id/card_view"
android:layout_gravity="center"
android:layout_width="fill_parent"
android:layout_height="150dp"
android:layout_margin="1dp"
card_view:cardCornerRadius="0dp"
card_view:contentPadding="2dp">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/card_style">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Username"
android:id="@+id/textView24"
android:textColor="#FFFFFF"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="25dp"
android:layout_marginStart="25dp"
android:layout_marginTop="8dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Mobile No."
android:id="@+id/textView25"
android:textColor="#FFFFFF"
android:layout_centerVertical="true"
android:layout_marginLeft="25dp"
android:layout_marginStart="25dp"
android:layout_alignRight="@+id/textView24"
android:layout_alignEnd="@+id/textView24" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Serial No."
android:id="@+id/textView26"
android:textColor="#FFFFFF"
android:layout_marginLeft="25dp"
android:layout_marginStart="25dp"
android:layout_alignParentBottom="true"
android:layout_marginBottom="8dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:id="@+id/textView27"
android:textColor="#FFFFFF"
android:layout_marginTop="8dp"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:id="@+id/textView28"
android:textColor="#FFFFFF"
android:layout_centerVertical="true"
android:layout_alignLeft="@+id/textView27"
android:layout_alignStart="@+id/textView27" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:id="@+id/textView29"
android:layout_alignTop="@+id/textView26"
android:layout_alignLeft="@+id/textView28"
android:layout_alignStart="@+id/textView28"
android:layout_marginBottom="8dp"
android:textColor="#FFFFFF"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
My DisplayAdapter is
public class DisplayAdapter extends CursorAdapter{
@SuppressWarnings("deprecation")
public DisplayAdapter(Context context,Cursor c){
super(context,c);
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View retView = inflater.inflate(R.layout.card_items, parent, false);
return retView;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView tvUserName=(TextView)view.findViewById(R.id.textView27);
tvUserName.setText(cursor.getString(2));
TextView tvMobile=(TextView)view.findViewById(R.id.textView28);
tvMobile.setText(cursor.getString(3));
TextView tvSerail=(TextView)view.findViewById(R.id.textView29);
tvSerail.setText(cursor.getString(5));
}
}
My Activity is
public class TableBikeActivity extends ActionBarActivity {
private DisplayAdapter adapter;
ListView bikeList;
DatabaseHelper databaseHelper;
EditText filterText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_table_bike);
databaseHelper=new DatabaseHelper(this);
bikeList=(ListView)findViewById(R.id.listView2);
filterText=(EditText)findViewById(R.id.editText5);
filterText.addTextChangedListener(filterTextWatcher);
new Handler().post(new Runnable() {
@Override
public void run() {
adapter = new DisplayAdapter(TableBikeActivity.this, databaseHelper.getAllDataBike());
bikeList.setAdapter(adapter);
}
});
}
private TextWatcher filterTextWatcher=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) {
adapter.getFilter().filter(s);
}
@Override
public void afterTextChanged(Editable s) {
}
};
@Override
protected void onDestroy(){
super.onDestroy();
filterText.removeTextChangedListener(filterTextWatcher);
}
}
I have tried TextChangedListener but it's not working. Help me.
回答1:
The setTextFilterEnabled() method doesn't automatically implement filtering, as it doesn't know what in your Cursor the text should be filtered against.
For a CursorAdapter cursor, you only need to use the setFilterQueryProvider, to run another query for your cursor, based on the constraint:
m_Adapter.setFilterQueryProvider(new FilterQueryProvider() {
public Cursor runQuery(CharSequence constraint) {
Log.d(LOG_TAG, "runQuery constraint:"+constraint);
//uri, projection, and sortOrder might be the same as previous
//but you might want a new selection, based on your filter content (constraint)
Cursor cur = managedQuery(uri, projection, selection, selectionArgs, sortOrder);
return cur; //now your adapter will have the new filtered content
}
});
When a constraint is added (eg. by using a TextView) the adapter must be filtered:
public void onTextChanged(CharSequence s, int start, int before, int count) {
Log.d(LOG_TAG, "Filter:"+s);
if (m_slvAdapter!=null) {
m_Adapter.getFilter().filter(s);
}
}
回答2:
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
adapter_members.getFilter().filter(s.toString());
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
来源：https://stackoverflow.com/questions/31026679/how-to-set-filter-to-listview-with-cursoradapter