更新的TextView不繁忙的ListView失去微调对焦 [英] Updating TextView without losing Spinner focus in busy ListView
问题描述
我的样品传感器（这是使ListView的忙）自定义用户速率和我展示的价值观在我的列表视图，因此我有一个自定义列表视图3的TextView（的x，y和z值）和一个微调。
I sample sensors (That's make the ListView busy) with custom user rate and I show the values in my listview, therefore I have a custom listview with 3 textview (for x, y and z values) and one spinner.
我的布局是：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:minWidth="140dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="X:"
android:id="@+id/tvX"
android:focusable="false"
android:focusableInTouchMode="false"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Y:"
android:focusable="false"
android:focusableInTouchMode="false"
android:id="@+id/tvY" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Z:"
android:focusable="false"
android:focusableInTouchMode="false"
android:id="@+id/tvZ" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:layout_marginLeft="30dp">
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:focusableInTouchMode="true"
android:id="@+id/spinner"/>
</LinearLayout>
</LinearLayout>
和我用这个code为适配器：
and I using this code as adapter:
public class customListView extends BaseAdapter
{
public Activity context;
ArrayList<MyActivity.SensorProperties> sensorPropertieses;
public String[] spinnerValues;
public LayoutInflater inflater;
public customListView(Activity context, ArrayList<MyActivity.SensorProperties> sensorPropertieses, String[] spinnerArray)
{
super();
this.context = context;
this.sensorPropertieses = sensorPropertieses;
spinnerValues = spinnerArray;
this.inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return sensorPropertieses.size();
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
class ViewHolder
{
TextView Xvalue, Yvalue, Zvalue;
Spinner spinner;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup)
{
ViewHolder holder;
if (view == null)
{
holder = new ViewHolder();
view = inflater.inflate(R.layout.custom_layout, null);
holder.Xvalue = (TextView) view.findViewById(R.id.tvX);
holder.Yvalue = (TextView) view.findViewById(R.id.tvY);
holder.Zvalue = (TextView) view.findViewById(R.id.tvZ);
holder.spinner = (Spinner) view.findViewById(R.id.spinner);
// populate spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>
(view.getContext(), android.R.layout.simple_spinner_item, spinnerValues);
holder.spinner.setAdapter(dataAdapter);
view.setTag(holder);
}
else
holder = (ViewHolder) view.getTag();
// update sensor values
holder.Xvalue.setText(String.valueOf("X: " + sensorPropertieses.get(i).x));
holder.Yvalue.setText(String.valueOf("Y: " + sensorPropertieses.get(i).y));
holder.Zvalue.setText(String.valueOf("Z: " + sensorPropertieses.get(i).z));
return view;
}
}
我的主要活动code是（布局只包含一个按钮，列表视图）：
my main activity code is (the layout contain only a button and listview):
public class MyActivity extends Activity implements SensorEventListener
{
public class SensorProperties
{
public float x = 0, y = 0, z = 0;
}
ListView listView;
ArrayList<SensorProperties> sensorPropertieses = new ArrayList<SensorProperties>();
customListView adapter;
SensorManager sensorManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
// let's work only on two nodes
sensorPropertieses.add(new SensorProperties());
sensorPropertieses.add(new SensorProperties());
listView = (ListView) findViewById(R.id.listView);
String[] spinnerValues = new String[] {"A", "B", "C"};
adapter = new customListView(MyActivity.this, sensorPropertieses, spinnerValues);
listView.setAdapter(adapter);
Button btnRegister = (Button) findViewById(R.id.buRegister);
btnRegister.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view)
{
RegisterToSensors();
}
});
}
void RegisterToSensors()
{
sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
sensorManager.registerListener(this, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_FASTEST);
sensorManager.registerListener(this, sensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE), SensorManager.SENSOR_DELAY_GAME);
}
@Override
public void onSensorChanged(SensorEvent sensorEvent)
{
SensorProperties tmp = new SensorProperties();
tmp.x = sensorEvent.values[0];
tmp.y = sensorEvent.values[1];
tmp.z = sensorEvent.values[2];
if (sensorEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER)
sensorPropertieses.set(0, tmp);
else
sensorPropertieses.set(1, tmp);
adapter.notifyDataSetChanged();
}
///...
}
的问题：我应该如何与ListView的工作包含的TextView和微调不用其他失去微调的重点，虽然我更新的TextView频率
The question: How should I work with ListView contains TextView and Spinner witout lost spinner focus although I update the TextView frequency?
编辑：
我改的问题标题和正文感谢 mmlooloo 的意见。
I change question title and body thanks to mmlooloo comments.
需要明确的是：
- 在我成功下拉微调，如果ListView控件不旺
- 在我成功下拉微调时，我TextView的更新频率不ListView控件
- 在该问题仅出现在ListView和仅在列表视图忙
EDIT2：
目前，我不知道如果问题是失去微调焦点。调试我在我的自定义列表视图更新的textviews传感器值（前 //更新传感器值）之前增加的30毫秒的睡眠：
Currently, I'm not sure if the issue is the losing spinner focus or not. for debugging I add sleep of 30ms before I updating sensors value in the textviews (before // update sensor values) in my custom list view:
try {
Thread.sleep(30);
} catch (InterruptedException e) {
e.printStackTrace();
}
和我成功下拉微调并选择其他项目，而TextView的更新（一切都非常缓慢，但工程！）。
And I success to drop-down the spinner and choose another item while the textview updating (everything is very slow, but works!).
新：我觉得，现在，恐怕这个问题是 adapter.notifyDataSetChanged（），因为我不能下拉的微调也当我灰了TextView的打印
NEW: I have find, right now, probably the issue is with adapter.notifyDataSetChanged() because I cannot drop down the spinner also when I gray-out the textview prints
底线，我真的不知道什么是根本原因，但我不能下拉的微调，当我更新列表视图文本视图频率，问题是为什么？
Bottom line, I'm not really know what is the root cause but I cannot drop-down the spinner when I update text views frequency in listview, and the question is why?
我会很高兴的任何帮助，谢谢！
I'll be glad for any help, Thank you!
推荐答案
这里的问题是，你经常打电话adapter.notifyDataSetChanged（）;在onSensorChanged方法，所以它绑定列表视图每次都这样做 您getView被称为每一次和每一次它设置微调值。
Issue here is you are frequently calling adapter.notifyDataSetChanged(); in your onSensorChanged method, so it binds listview every time so does your getView is called every time and which sets spinner value every time.
我所做的是，第一和第二个孩子onSensorChanged方法来访问你的列表视图，并从我访问过texviews并根据需要频繁更新它们 您可以访问您的微调了。
What I did is, accessed your listview first and second child in onSensorChanged method and from that I have accessed texviews and update them as frequently as you want and you can access your spinner too.
@Override
public void onSensorChanged(SensorEvent sensorEvent) {
// SensorProperties tmp = new SensorProperties();
// tmp.x = sensorEvent.values[0];
// tmp.y = sensorEvent.values[1];
// tmp.z = sensorEvent.values[2];
// if (sensorEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER)
// sensorPropertieses.set(0, tmp);
// else
// sensorPropertieses.set(1, tmp);
// adapter.notifyDataSetChanged();
Log.i("tag", "ensorEvent.values[0] = " + sensorEvent.values[0]);
if (sensorEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
View childView = (View) listView.getChildAt(0);
TextView xTextView = (TextView) childView.findViewById(R.id.tvX);
xTextView.setText(String.valueOf(sensorEvent.values[0]));
TextView yTextView = (TextView) childView.findViewById(R.id.tvY);
yTextView.setText(String.valueOf(sensorEvent.values[1]));
TextView zTextView = (TextView) childView.findViewById(R.id.tvZ);
zTextView.setText(String.valueOf(sensorEvent.values[2]));
} else {
View childView = (View) listView.getChildAt(1);
TextView xTextView = (TextView) childView.findViewById(R.id.tvX);
xTextView.setText(String.valueOf(sensorEvent.values[0]));
TextView yTextView = (TextView) childView.findViewById(R.id.tvY);
yTextView.setText(String.valueOf(sensorEvent.values[1]));
TextView zTextView = (TextView) childView.findViewById(R.id.tvZ);
zTextView.setText(String.valueOf(sensorEvent.values[2]));
}
}
这篇关于更新的TextView不繁忙的ListView失去微调对焦的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
