问题
may I know how to get the specific value for each SeekBar which I have created in custom ListView? I am able to create the static one but what if i want to retrieve the value for each SeekBar in the custom ListView based on my sliding? Thank you.
--Activity code--
public class DisplayAssessmentActivity extends ActionBarActivity {
ListDatabaseHandler listCriteria;
private SimpleCursorAdapter dataAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_assessment);
//Open connection and get instance from database
listCriteria = new ListDatabaseHandler(this);
listCriteria.open();
//Delete all data
listCriteria.deleteAllCriteria();
//Add data
listCriteria.insertSomeCriteria();
//Retrieve data from database and display in list view
displayCriteriaListView();
}
private void displayCriteriaListView() {
Cursor cursor = listCriteria.fetchAllCriteria();
// The desired columns to be bound
String[] columns = new String[] {
ListDatabaseHandler.KEY_CRITERIANAME,
ListDatabaseHandler.KEY_CRITERIAWEIGHTAGE,
};
// the XML defined views which the data will be bound to
int[] to = new int[] {
R.id.criteriaName,
R.id.criteriaWeightage
};
// create the adapter using the cursor pointing to the desired data
//as well as the layout information
dataAdapter = new SimpleCursorAdapter(
this, R.layout.activity_list_criteria,
cursor,
columns,
to,
0);
ListView listView = (ListView) findViewById(R.id.criteriaListView);
// Assign adapter to ListView
listView.setAdapter(dataAdapter);
//Action when click on the item
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> listView, View view,
int position, long id) {
// Get the cursor, positioned to the corresponding row in the result set
Cursor cursor = (Cursor) listView.getItemAtPosition(position);
//Get matric number from this row in the database
String criteria = cursor.getString(cursor.getColumnIndexOrThrow("criteria_name"));
// Get the state's capital from this row in the database.
String weightage =
cursor.getString(cursor.getColumnIndexOrThrow("criteria_weightage"));
//Toast.makeText(getApplicationContext(),
//subjectName, Toast.LENGTH_SHORT).show();
Intent intentResult = new Intent(getApplicationContext(), ResultActivity.class);
startActivity(intentResult);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_display_assessment, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
activity_list_criteria.xml
enter code here
//Label criteria
<TextView
android:id="@+id/txtViewCriteria"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Criteria : " />
//Label criteria from db
<TextView
android:id="@+id/criteriaName"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:text="Criteria" />
<TextView
android:layout_width="180dp"
android:layout_height="fill_parent" />
</LinearLayout>
//SeekBar layout
<SeekBar
android:id="@+id/sbBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:progress="0"
android:max="5"
android:paddingTop="20dp" />
//TextViews for SeekBarlegend
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="horizontal" >
<TextView
android:id="@+id/tvLabel1"
android:paddingLeft="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0" />
<TextView
android:id="@+id/tvLabel3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:paddingRight="10dp"
android:text="5" />
</RelativeLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="35dp">
//Label weightage
<TextView
android:id="@+id/txtViewWeightage"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Weightage: "/>
//Label weightage from db
<TextView
android:id="@+id/criteriaWeightage"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/stuMatric"
android:layout_toRightOf="@+id/textView2"
android:text="Weightage" />
</LinearLayout>
activity_display_assessment.xml
//Title Layout
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="60dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="60dp"
android:background="@drawable/orangehome"
android:orientation="horizontal">
<TextView
android:layout_width="110dp"
android:layout_height="fill_parent" />
<TextView
android:layout_width="170dp"
android:text="Evaluate"
android:layout_gravity="center_horizontal"
android:gravity="center"
android:textColor="#FFFFFF"
android:textSize="30sp"
android:layout_height="60dp" />
<TextView
android:layout_width="50dp"
android:layout_height="fill_parent" />
<Button
android:id="@+id/btnLogout"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_gravity="center_vertical"
android:background="@drawable/logout"/>
</LinearLayout>
</LinearLayout>
//Criteria layout
<TextView
android:id="@+id/txtViewSubject"
android:paddingTop="10dp"
android:layout_gravity="center_horizontal"
android:gravity="center"
android:layout_width="300dp"
android:layout_height="60dp"
android:textSize="18sp"
android:textColor="#000000"
android:text="Criteria"/>
//List view for criteria
<ListView
android:id="@+id/criteriaListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
回答1:
So far, the method below solve my question.
public class MySimpleArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final ArrayList<String> values;
public MySimpleArrayAdapter(Context context, ArrayList<String> values) {
super(context, R.layout.rowlayout, values);
this.context = context;
this.values = values;
}
/**
* Here we go and get our rowlayout.xml file and set the textview text.
* This happens for every row in your listview.
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.rowlayout, parent, false);
TextView textView = (TextView) rowView.findViewById(R.id.criteriaName);
final TextView textView2 = (TextView)rowView.findViewById(R.id.txtView2);
SeekBar seekBar = (SeekBar)rowView.findViewById(R.id.sbBar);
// Setting the text to display
textView.setText(values.get(position));
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
textView2.setText(""+i);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
return rowView;
}
}
回答2:
Try this:
final AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
final int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
I hope it helps.
回答3:
Simple and elegant:
yourListView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
seekbar = (SeekBar)yourListView.getItemAtPosition(position);
seekbar.setFocusable(true);
seekbar.setEnabled(true);
int value = seekbar.getProgress(); // get value here
}
});
Try this and let me know if it works or not.
This is not Tested, so if you only enter SeekBars into your ListView only then this will work.
来源：https://stackoverflow.com/questions/30398561/how-to-get-the-value-for-each-seek-bar-created-in-list-view-android