我正在创建一个Android应用程序。我想要的是，当用户单击一行中的开关时，它会调用listview的onitemclicklistener。之前，我试图在我的customAdapter中的switch的onclicklistener上调用listview的itemclicklistener，但是它会抛出一个错误。如果我没办法达到我想要的结果，请告诉我另一种方法。如果你想知道为什么我需要listview的itemclick在switch的onclick中被调用是因为itemclick是我可以获得行ID的唯一方法，我将用它来更新行。
提前谢谢你。 ：）
这是listview的活动代码：
import java.text.DecimalFormat;
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;
public class ListViewForm extends Activity {
private CustomCursorAdapter customAdapter;
private TodoItemDatabase td;
private ListView lv;
private Switch swi;
int devId, devPos;
long devId2;
String devName;
int devWatt, devStat;
//for timer
Timer timer;
TimerTask timerTask;
Handler handler, adapter;
//for bill compute
int totalWatt;
int totalHour = 1;
double wattHourPerDay, kiloWattPerDay, kiloWattPerMonth, billPerMonth;
int timerFirstRun;
double costPerMonth = 8.5568 ;
//int delay = 3600000;
int delay = 50000;
TextView lblBillVal;
//double costPerMonth = .10 ;
OnItemClickListener itemClick;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_view_form);
lv = (ListView)findViewById(R.id.list_data);
lv.setItemsCanFocus(false);
lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
lblBillVal = (TextView)findViewById(R.id.lblBillValue);
lblBillVal.setText("");
swi = (Switch)findViewById(R.id.switch1);
//itemClick
itemClick = new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View v, int pos, long id) {
// TODO Auto-generated method stub
Log.d("batelec", "id: "+id+" pos: "+pos);
TodoItemDatabase td = new TodoItemDatabase(getBaseContext());
int x = Integer.valueOf(String.valueOf(id));
Cursor cur = td.getOneRow(x);
if(cur != null){
if(cur.moveToFirst()){
Log.d("batelec", "inside onitemclick, cur count: "+cur.getCount());
devStat = cur.getInt(cur.getColumnIndex(cur.getColumnName(3)));
Log.d("batelec", "1st devStat: "+devStat);
if(devStat == 0){
devStat = 1;
}
else{
devStat = 0;
}
devId = cur.getInt(cur.getColumnIndex(cur.getColumnName(0)));
devName = cur.getString(cur.getColumnIndex(cur.getColumnName(1)));
devWatt = cur.getInt(cur.getColumnIndex(cur.getColumnName(2)));
//devStat
Log.d("batelec", "2nd devStat: "+devStat);
td.updateStat(new TodoItem(devId, devName, devWatt, devStat));
CustomCursorAdapter cr = new CustomCursorAdapter(ListViewForm.this, td.getAllData());
cr.notifyDataSetChanged();
lv.setAdapter(cr);
}
}
}
};
lv.setOnItemClickListener(itemClick);
//itemLongClick
lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View v, int pos, long id){
Log.d("batelec", "longclick");
return onLongListItemClick(v, pos, id);
}
});
td = new TodoItemDatabase(this);
new Handler().post(new Runnable(){
@Override
public void run(){
customAdapter = new CustomCursorAdapter(ListViewForm.this, td.getAllData());
lv.setAdapter(customAdapter);
}
});
//useHandler();
}
//itemLongClick
protected boolean onLongListItemClick(View v, final int pos, long id) {
Log.d("batelec", "onLongListItemClick id= " + id + " position= " + pos);
devId2 = id;
devPos = pos;
final Dialog dialog = new Dialog(ListViewForm.this);
dialog.setContentView(R.layout.dialog_form_design);
dialog.setTitle("Option");
Button btnEdit = (Button)dialog.findViewById(R.id.dialogBtnEdit);
Button btnDelete = (Button)dialog.findViewById(R.id.dialogBtnDelete);
btnEdit.setOnClickListener(new OnClickListener(){
public void onClick(View v){
TodoItemDatabase td = new TodoItemDatabase(ListViewForm.this);
Cursor cur = td.getAllData();
if(cur!=null){
if(cur.moveToFirst()){
cur.moveToPosition(pos);
devId = cur.getInt(cur.getColumnIndex("_id"));
devName = cur.getString(cur.getColumnIndex("deviceName"));
devWatt = cur.getInt(cur.getColumnIndex("deviceWattage"));
devStat = cur.getInt(cur.getColumnIndex("deviceStatus"));
Log.d("batelec", "devID: "+devId+" devName: "+devName+" devWatt: "+devWatt+" devStat: "+devStat);
}
}
Intent i = new Intent(getBaseContext(),AddDeviceForm.class);
Bundle b = new Bundle();
Log.d("batelec", "sent id: "+devId);
b.putInt("xtraDevId", devId);
b.putString("xtraDevName", devName);
b.putInt("xtraWatt", devWatt);
b.putInt("xtraStat", devStat);
Log.d("batelec", "sent devStat: "+devStat);
i.putExtras(b);
startActivity(i);
finish();
}
});
btnDelete = (Button)dialog.findViewById(R.id.dialogBtnDelete);
btnDelete.setOnClickListener(new OnClickListener(){
public void onClick(View v){
TodoItemDatabase td = new TodoItemDatabase(ListViewForm.this);
Cursor cur = td.getAllData();
if(cur!=null){
if(cur.moveToFirst()){
cur.moveToPosition(pos);
devId = cur.getInt(cur.getColumnIndex("_id"));
devName = cur.getString(cur.getColumnIndex("deviceName"));
devWatt = cur.getInt(cur.getColumnIndex("deviceWattage"));
devStat = cur.getInt(cur.getColumnIndex("deviceStatus"));
devPos = pos;
Log.d("batelec", "devID: "+devId+" devName: "+devName+" devWatt: "+devWatt+" devStat: "+devStat+" devPos: "+devPos);
}
}
Bundle b = new Bundle();
b.putInt("xtraId", devId);
b.putInt("xtraPos", devPos);
DialogFragment deleteDiag = new DeleteDialog();
deleteDiag.setArguments(b);
deleteDiag.show(getFragmentManager(), "deleteDevice");
}
});
dialog.show();
Log.d("batelec", "showing dialog");
return true;
}
public void useHandler(){
handler = new Handler();
handler.postDelayed(runnable, delay);
}
public void stopRunnable(View v){
handler.removeCallbacks(runnable);
}
private Runnable runnable = new Runnable(){
@Override
public void run(){
TodoItemDatabase td = new TodoItemDatabase(getBaseContext());
Cursor cur = td.getActiveDevice();
if(timerFirstRun == 0){
timerFirstRun++;
Log.d("batelec", "timer = 0");
}
else{
try{
if(cur != null){
Toast.makeText(getBaseContext(), "1 hour elapsed", Toast.LENGTH_LONG).show();
/*cur.moveToFirst();
for(int x = 1; x <= cur.getCount(); x++){
int id = cur.getInt(cur.getColumnIndex("_id"));
String name = cur.getString(cur.getColumnIndex("deviceName"));
int watt = cur.getInt(cur.getColumnIndex("deviceWattage"));
int stat = cur.getInt(cur.getColumnIndex("deviceStatus"));
Log.d("batelec", "id: " + id + " name: " + name + " watt: " + watt + " status: " + stat);
totalWatt = totalWatt + watt;
cur.moveToNext();
}*/
totalWatt = 125;
Log.d("batelec", "total hour: "+totalHour);
wattHourPerDay = totalWatt * totalHour;//all active device wattage * hours it is active
Log.d("batelec", "wattPerHour: "+wattHourPerDay+" (totalWatt * totalHour)");
kiloWattPerDay = wattHourPerDay / 1000;//all device watts divided by 1000 watts = 1 kW
Log.d("batelec", "kilowatt per day: "+kiloWattPerDay+" (wattPerHour / 1000)");
kiloWattPerMonth = (wattHourPerDay * 30) / 1000;//watts per month
Log.d("batelec", "kiloWatt per month: "+kiloWattPerMonth+" ((wattPerHour * 30) / 1000)");
billPerMonth = kiloWattPerMonth * costPerMonth;//estimated bill per month
Log.d("batelec", "bill per month: "+billPerMonth+" (kiloWattPerMonth * costPerMonth)");
Double res;
DecimalFormat df = new DecimalFormat("#.##");
res = Double.valueOf(df.format(billPerMonth));
Log.d("batelec", "new bill: "+res);
lblBillVal.setText(String.valueOf(res));
totalHour++;
}
}catch(Exception e){
Log.d("batelec", ""+e);
}
}
handler.postDelayed(runnable, delay);
}
};
}
这是我的自定义适配器代码：
import android.content.Context;
import android.database.Cursor;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import android.widget.Switch;
import android.widget.TextView;
public class CustomCursorAdapter extends CursorAdapter {
int wattTotal = 0;
int pos, i;
int[] tags;
//components
TextView txtDevName, txtDevWatt;
Switch swiStatus;
//ViewHolder viewHolder;
@SuppressWarnings("deprecation")
public CustomCursorAdapter(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.list_view_design, parent, false);
return retView;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
txtDevName = (TextView) view.findViewById(R.id.textDeviceName);
txtDevName.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(1))));
String name = cursor.getString(cursor.getColumnIndex(cursor.getColumnName(1)));
txtDevWatt = (TextView) view.findViewById(R.id.textDeviceWatt);
txtDevWatt.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(2))));
swiStatus = (Switch) view.findViewById(R.id.switch1);
int stat = cursor.getInt(cursor.getColumnIndex(cursor.getColumnName(3)));
Log.d("batelec", "Name: "+ name + " Stat: "+stat);
//Log.d("batelec", "tags: "+i);
/* swiStatus.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Log.d("batelec", "switch click: "+i);
ListViewForm lvf = new ListViewForm();
lvf.itemClick();
}
});*/
if (stat == 0){
swiStatus.setChecked(false);
}
else{
swiStatus.setChecked(true);
}
//i++;
}
}
答案 0 :(得分：0)
这是我的xml，我不明白yshahak最初的含义
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.03" >
<TableRow
android:id="@+id/tableRow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.03" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.03"
android:text="@string/txtDeviceName"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.03"
android:text="@string/txtDeviceWatt"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.03"
android:gravity="top|end"
android:text="@string/txtStatus"
android:textAppearance="?android:attr/textAppearanceLarge" />
</TableRow>
</TableLayout>
<ListView
android:id="@+id/list_data"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:clickable="true"
android:focusable="false"
android:longClickable="true"
android:descendantFocusability="blocksDescendants"/>
<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.03" >
<TableRow
android:id="@+id/tableRow2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/lblApproxBill"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/txtEstimateBill"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/lblBillValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:text="@string/txtNull"
android:textAppearance="?android:attr/textAppearanceLarge"
android:width="@dimen/listNameFieldSize" />
</TableRow>
</TableLayout>
</LinearLayout>