在我的应用程序中，我有一个布局，在ListActivity的标题中显示总线停止详细信息，同时将所有可用的到达预测显示为列表。列表标题包含两个按钮，第一个用于将总线停止保存到数据库，第二个用于刷新活动。但OnClickListner（）不起作用。我已经在没有onClickListner（）的情况下测试了我的代码，它运行正常 记得！在我的代码中，按钮是固定列表标题的一部分 我已经尝试过这里已经讨论过的建议，但那些对我没用。请帮帮我......我的代码如下：
public class MainBusStopByIdActivity extends ListActivity implements OnClickListener{
private final String TAG = getClass().getSimpleName();
ReadingBusStopByIdData readingData = new ReadingBusStopByIdData();
LinkedList<BusStop> stopList = new LinkedList<BusStop>();
LinkedList<Predictions> predictionsList = new LinkedList<Predictions>();
private AdapterForBusStopById mAdapter;
String userInput;
Button saveButton;
Button refreshButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Initialising buttons
saveButton = (Button) findViewById(R.id.save_button);
refreshButton = (Button) findViewById(R.id.refresh_button);
// Creating new adapter instance
mAdapter = new AdapterForBusStopById();
// Retrieving data (user Input) sent from previous page
Intent newIntent = getIntent();
userInput = newIntent.getStringExtra("input");
// Retrieving data on background thread
new loadBusStopDetails().execute(userInput);
new loadBusPredictions().execute(userInput);
// Setting up onClickListner() for both buttons
refreshButton.setOnClickListener(this);
saveButton.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.save_button:
boolean didItWork = true;
try {
if (stopList.size() != 0) {
String stopId = null;
String stopName = null;
for (BusStop stop : stopList) {
stopId = stop.getStopId();
stopName = stop.getStopName().toString();
}
Toast.makeText(MainBusStopByIdActivity.this,
stopId + "\n" + stopName, Toast.LENGTH_LONG).show();
DatabaseAccess entry = new DatabaseAccess(
MainBusStopByIdActivity.this);
entry.open();
entry.createEntry(stopId, stopName);
entry.close();
} else {
Toast.makeText(MainBusStopByIdActivity.this,
"No Bus-stop Information Found!!!",
Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
didItWork = false;
String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("Error!!!");
TextView tv = new TextView(this);
tv.setText(error);
d.setContentView(tv);
d.show();
} finally {
if (didItWork) {
Dialog d = new Dialog(this);
d.setTitle("Entry to Favourites");
TextView tv = new TextView(this);
tv.setText("Scuccessfully Added Bus-Stop to Favourites...");
d.setContentView(tv);
d.show();
}
}
break;
case R.id.refresh_button:
break;
}
}
// Adapter Class
private class AdapterForBusStopById extends BaseAdapter {
private static final int TYPE_PREDICTION = 0;
private static final int TYPE_BUSSTOP_HEADER = 1;
private ArrayList<String> mData = new ArrayList<String>();
private LayoutInflater mInflater;
private TreeSet<Integer> mSeparatorsSet = new TreeSet<Integer>();
public AdapterForBusStopById() {
mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void addItem(final String item) {
mData.add(item);
notifyDataSetChanged();
}
public void addSeparatorItem(final String item) {
mData.add(item);
// save separator position
mSeparatorsSet.add(mData.size() - 1);
notifyDataSetChanged();
}
@Override
public int getItemViewType(int position) {
return mSeparatorsSet.contains(position) ? TYPE_BUSSTOP_HEADER
: TYPE_PREDICTION;
}
public int getCount() {
return mData.size();
}
public String getItem(int position) {
return mData.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
int type = getItemViewType(position);
System.out.println("getView " + position + " " + convertView
+ " type = " + type);
if (convertView == null) {
holder = new ViewHolder();
switch (type) {
case TYPE_PREDICTION:
convertView = mInflater.inflate(R.layout.predictions, null);
holder.textView = (TextView) convertView
.findViewById(R.id.predictionText);
break;
case TYPE_BUSSTOP_HEADER:
convertView = mInflater.inflate(R.layout.bus_stop_header,
null);
holder.textView = (TextView) convertView
.findViewById(R.id.textSeparator);
break;
}
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.textView.setText(mData.get(position));
return convertView;
}
}
public static class ViewHolder {
public TextView textView;
}
// Downloading Bus-stop Information
// AsyncTask Class for downloading Bus-Stop data in Background
public class loadBusStopDetails extends
AsyncTask<String, Integer, LinkedList<BusStop>> {
@Override
protected LinkedList<BusStop> doInBackground(String... params) {
// TODO Auto-generated method stub
stopList = readingData.readStopDetailsByBusStopId(userInput);
// Retrieving & Showing bus-stop data
for (BusStop stop : stopList) {
String stopData = " NAME: "
+ stop.getStopName().toString() + " ("
+ stop.getStopPointer().toString()
+ ")\n STOP ID: "
+ stop.getStopId().toString() + "\n STOP STATUS: "
+ stop.getStopStatus().toString()
+ "\n TOWARDS: "
+ stop.getTowards().toString();
Log.d(TAG, "::::::::::::::::::::DATA:::::::::::::::::::\n"
+ "<<<<<<" + stopData + ">>>>>>\n");
mAdapter.addSeparatorItem(stopData);
}
Log.d(TAG, "::::::::::::::::::::DATA:::::::::::::::::::\n"
+ "<<<<<<" + stopList.size() + ">>>>>>\n");
return stopList;
}
protected void onPostExecute(LinkedList<BusStop> result) {
stopList = result;
}
}
// Downloading Bus-predictions Information
// AsyncTask Class for downloading Bus-Predictions data in Background
public class loadBusPredictions extends
AsyncTask<String, Integer, LinkedList<Predictions>> {
ProgressDialog dialog;
protected void onPreExecute() {
dialog = new ProgressDialog(MainBusStopByIdActivity.this);
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.setMax(100);
dialog.show();
}
@Override
protected LinkedList<Predictions> doInBackground(String... params) {
// TODO Auto-generated method stub
for (int i = 0; i < 20; i++) {
publishProgress(4);
try {
Thread.sleep(200);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
dialog.dismiss();
// Retrieving & Showing bus-prediction data
predictionsList = readingData
.readStopPredictionsByBusStopId(userInput);
for (Predictions prediction : predictionsList) {
int time = prediction.getTime();
String stringTime;
if (time == 0) {
stringTime = "DUE";
} else {
stringTime = String.valueOf(time);
}
String predictionData = " "
+ prediction.getRoute().toString() + " "
+ stringTime + " "
+ prediction.getDestination().toString() + " \n ";
mAdapter.addItem(predictionData);
}
return predictionsList;
}
protected void onProgressUpdate(Integer... progress) {
dialog.incrementProgressBy(progress[0]);
}
protected void onPostExecute(LinkedList<Predictions> result) {
predictionsList = result;
setListAdapter(mAdapter);
// Displaying related messages if there's something wrong
if (stopList.size() != 0) {
if (predictionsList.size() != 0) {
} else {
Toast.makeText(
MainBusStopByIdActivity.this,
"There are no Buses to this Bus Stop in Next 30 Minutes.",
Toast.LENGTH_LONG).show();
}
} else {
Toast.makeText(
MainBusStopByIdActivity.this,
"There is 'NO' Bus Stop Exist with " + userInput
+ " Bus-Stop ID.", Toast.LENGTH_LONG).show();
}
}
}
}
我的XML代码如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:descendantFocusability="blocksDescendants" >
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/holo_blue_light" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="@+id/tflImage"
android:layout_width="50dp"
android:layout_height="60dp"
android:layout_gravity="center_vertical"
android:layout_margin="2.5dp"
android:background="@drawable/redtrain128"
android:contentDescription="@string/hello_world" />
<TextView
android:id="@+id/textSeparator"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#000"
android:gravity="left"
android:text="text"
android:textColor="#FFFFFFFF"
android:visibility="visible" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/holo_blue_light" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/save_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add to Favourites"
android:focusable="false"
android:focusableInTouchMode="false"
android:onClick="onClick" />
<Button
android:id="@+id/refresh_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Refresh"
android:focusable="false"
android:focusableInTouchMode="false"
android:onClick="onClick" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/holo_blue_light" />
<TextView
android:id="@+id/textSeparator"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#FF0000"
android:gravity="left"
android:text=" ROUTE TIME DESTINATION"
android:textColor="#FFFFFFFF"
android:textSize="8pt"
android:textStyle="bold"
android:typeface="normal"
android:visibility="visible" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/holo_blue_light" />
</LinearLayout>
我还发现了关于这个问题的以下链接，但我没有得到如何在我的情况下实现。请看看，可能是您有任何想法，链接在这里：for link clik here
谢谢...
答案 0 :(得分：2)
将包含ListView的父布局的 android：descendantFocusability 属性设置为值 blocksDescendants ，如：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:descendantFocusability="blocksDescendants"> ...</LinearLayout>
修改
我采取的另一种方法是更方便imho，支持复杂内容并在API 10及更高版本上进行测试：
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:clickable="true"
android:onClick="YOUR_CLICK_HANDLE"
android:background="@android:drawable/btn_default"
android:id="@+id/complexButtonLayout"
>
..
complex contents
...
</LinearLayout>
您可以使用via handle（托管视图的活动实现public void YOUR_CLICK_HANDLE（View view）; method）或者以编程方式注册onclick处理程序。
但是，我使用片段中的视图。