我试图构建这个简单包含ListView的应用程序，以及在单击视图中的项目时将调用的其他活动。但是，我无法在主活动中实现onclicklistener。使用下面的代码，我无法打开活动。
下面是代码：
public void setOnItemClickListener(AdapterView<?> parent, View view,
int position, long id) {
switch( position )
{
case 0: Intent newActivity0 = new Intent(this, TempuraActivity.class);
startActivity(newActivity0);
break;
case 1: Intent newActivity1 = new Intent(this, TempuraActivity.class);
startActivity(newActivity1);
break;
case 2: Intent newActivity2 = new Intent(this, TempuraActivity.class);
startActivity(newActivity2);
break;
case 3: Intent newActivity3 = new Intent(this, TempuraActivity.class);
startActivity(newActivity3);
break;
case 4: Intent newActivity4 = new Intent(this, TempuraActivity.class);
startActivity(newActivity4);
break;
}
}
任何帮助将不胜感激:)评论如果你需要看到完整的代码，我会在帖子中更新。谢谢！
感谢所有回复！ 下面是完整的代码：
public class MainActivity extends ListActivity {
private LayoutInflater mInflater;
private Vector<RowData> data;
RowData rd;
static final String[] title = new String[] {
"Christmas Crepes", "Dorayaki", "Corned Beef", "Tempura"
};
static final String[] release = new String[] {
"New!", "New!", "4 months ago", "New!"
};
static final String[] description = new String[] {
"Blehh..","Pam pam pam","new era","Steve Jobs is dead"
};
static final String[] difficulty = new String[] {
"Hard","Easy","Medium","Hard"
};
static final String[] serves = new String[] {
"4 persons","2 persons","2 cups","1 person"
};
static final String[] time = new String[] {
"40 mins","20 mins","50 mins","120 mins"
};
private Integer[] imgid = {
R.drawable.thumbone,R.drawable.thumbtwo,R.drawable.thumbthree,
R.drawable.thumbfour
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mInflater = (LayoutInflater) getSystemService(
Activity.LAYOUT_INFLATER_SERVICE);
data = new Vector<RowData>();
for(int i=0;i<title.length;i++){
try {
rd = new RowData(i,title[i],release[i],description[i],difficulty[i],serves[i],time[i]);
} catch (ParseException e) {
e.printStackTrace();
}
data.add(rd);
}
CustomAdapter adapter = new CustomAdapter(this, R.layout.list, android.R.id.list, data);
setListAdapter(adapter);
getListView().setTextFilterEnabled(true);
}
public void setOnItemClickListener(AdapterView<?> parent, View view,
int position, long id) {
switch( position )
{
case 0: Intent newActivity0 = new Intent(this, TempuraActivity.class);
startActivity(newActivity0);
break;
case 1: Intent newActivity1 = new Intent(this, TempuraActivity.class);
startActivity(newActivity1);
break;
case 2: Intent newActivity2 = new Intent(this, TempuraActivity.class);
startActivity(newActivity2);
break;
case 3: Intent newActivity3 = new Intent(this, TempuraActivity.class);
startActivity(newActivity3);
break;
case 4: Intent newActivity4 = new Intent(this, TempuraActivity.class);
startActivity(newActivity4);
break;
}
}
private class RowData {
protected int mId;
protected String mTitle;
protected String mRelease;
protected String mDescription;
protected String mDifficulty;
protected String mServes;
protected String mTime;
RowData(int id, String title, String release, String description, String difficulty, String serves, String time){
mId=id;
mTitle = title;
mRelease = release;
mDescription = description;
mDifficulty = difficulty;
mServes = serves;
mTime = time;
}
@Override
public String toString() {
return mId+" "+mTitle+" "+mRelease+" "+mDescription+" "+mDifficulty+" "+mServes+" "+mTime;
}
}
private class CustomAdapter extends ArrayAdapter<RowData> {
public CustomAdapter(Context context, int resource, int textViewResourceId, List<RowData> objects) {
super(context, resource, textViewResourceId, objects);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
TextView title = null;
TextView release = null;
TextView description = null;
TextView difficulty = null;
TextView serves = null;
TextView time = null;
ImageView thumbnail=null;
RowData rowData= getItem(position);
if(null == convertView){
convertView = mInflater.inflate(R.layout.list, null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
}
holder = (ViewHolder) convertView.getTag();
title = holder.gettitle();
title.setText(rowData.mTitle);
release = holder.getdescription();
release.setText(rowData.mRelease);
description = holder.getrelease();
description.setText(rowData.mDescription);
difficulty = holder.getdifficulty();
difficulty.setText(rowData.mDifficulty);
serves = holder.getserves();
serves.setText(rowData.mServes);
time = holder.gettime();
time.setText(rowData.mTime);
thumbnail=holder.getImage();
thumbnail.setImageResource(imgid[rowData.mId]);
return convertView;
}
private class ViewHolder {
private View mRow;
private TextView title = null;
private TextView release = null;
private TextView description = null;
private TextView difficulty = null;
private TextView serves = null;
private TextView time = null;
private ImageView thumbnail=null;
public ViewHolder(View row) {
mRow = row;
}
public TextView gettitle() {
if(null == title){
title = (TextView) mRow.findViewById(R.id.title);
}
return title;
}
public TextView getrelease() {
if(null == release){
release = (TextView) mRow.findViewById(R.id.release);
}
return release;
}
public TextView getdescription() {
if(null == description){
description = (TextView) mRow.findViewById(R.id.description);
}
return description;
}
public TextView getdifficulty() {
if(null == difficulty){
difficulty = (TextView) mRow.findViewById(R.id.difficulty);
}
return difficulty;
}
public TextView getserves() {
if(null == serves){
serves = (TextView) mRow.findViewById(R.id.serves);
}
return serves;
}
public TextView gettime() {
if(null == time){
time = (TextView) mRow.findViewById(R.id.title);
}
return time;
}
public ImageView getImage() {
if(null == thumbnail){
thumbnail = (ImageView) mRow.findViewById(R.id.thumbnail);
}
return thumbnail;
}
}
}
}
如果有更好的方法来实现我的应用程序应该，请发布！我迫切需要一次完成这个！
答案 0 :(得分：4)
<强>更新
更改
public void setOnItemClickListener(AdapterView<?> parent, View view,
int position, long id) {
到
protected void onListItemClick(ListView l, View v, int position, long id) {
它应该有用。
<强> ORIGINAL
您的代码有点令人困惑，存在setOnItemClickListener，但您需要实际传递方法onItemClickListener对象（或匿名类）。
也许您正在ListActivity中寻找类似的内容。
final ListView listView = getListView();
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> paramAdapterView, View paramView, int paramInt,
long paramLong) {
switch( position )
{
case 0: Intent newActivity0 = new Intent(YourActivity.this, TempuraActivity.class);
startActivity(newActivity0);
break;
case 1: Intent newActivity1 = new Intent(YourActivity.this, TempuraActivity.class);
startActivity(newActivity1);
break;
case 2: Intent newActivity2 = new Intent(YourActivity.this, TempuraActivity.class);
startActivity(newActivity2);
break;
case 3: Intent newActivity3 = new Intent(YourActivity.this, TempuraActivity.class);
startActivity(newActivity3);
break;
case 4: Intent newActivity4 = new Intent(YourActivity.this, TempuraActivity.class);
startActivity(newActivity4);
break;
}
}
});
在这里，您可以在onItemClick的onItemClickListener方法中实现您的switch语句，它应该有效。
注意：您必须将this更改为YourActivity.this，因为您将进入内部类，并且需要引用外部活动类。
或者，您可以覆盖onListItemClick：
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// ... put switch statement here
}
在列表活动中删除对getListView()
如果这不能回答您的问题请完整代码