我用CustomListView填充CustomAdapter，我点击了LinearLayout，我点击了AlertDialog，然后问我是否要转到另一个打开Activity的{{1}}。
所以我在pdf方法中使用了一个监听器，在我的AlerDialog的getView()方法中放置了Intent。
我的CustomAdapter类，扩展onClick并实施Activity。
所以我不明白为什么他不能参加另一项活动。
这是我的CustomAdapter类：
ListAdapter这是我的LogCat中的错误：
package com.listpoint;
import java.util.ArrayList;
import java.util.HashMap;
import com.main.R;
import com.pdf.ViewPdf;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.DataSetObserver;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class CustomListingCrossAdapter extends Activity implements ListAdapter {
public Integer selectedPosition = null;
public LayoutInflater m_inflater;
public Context ctx;
public ArrayList<HashMap<String, String>> listItem;
public CustomListingCrossHolder holder;
public ListView listView;
public AsyncTaskSet asyncTaskSet;
public CustomListingCrossAdapter(Context newCtx, ArrayList<HashMap<String, String>> newListItem, ListView listView) {
this.ctx = newCtx;
this.listItem = newListItem;
this.m_inflater = (LayoutInflater) this.ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.listView = listView;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return this.listItem.size();
}
@Override
public Object getItem(int position) {
return this.listItem.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final HashMap<String, String> object = (HashMap<String, String>) this.getItem(position);
final ListCrossingPoint listCrossingPointClass = new ListCrossingPoint();
selectedPosition = position;
if (convertView == null) {
holder = new CustomListingCrossHolder();
convertView = m_inflater.inflate(R.layout.list_type_tournee, null);
holder.producer_id = (TextView) convertView.findViewById(R.id.producer_id);
holder.product_code = (TextView) convertView.findViewById(R.id.product_code);
holder.begin_hour = (TextView) convertView.findViewById(R.id.begin_hour);
holder.end_hour = (TextView) convertView.findViewById(R.id.end_hour);
holder.tel = (TextView) convertView.findViewById(R.id.tel);
holder.fax = (TextView) convertView.findViewById(R.id.fax);
holder.adress = (TextView) convertView.findViewById(R.id.adress);
holder.order = (TextView) convertView.findViewById(R.id.order);
holder.downtime = (TextView) convertView.findViewById(R.id.downtime);
holder.miscellaneous = (TextView) convertView.findViewById(R.id.miscellaneous);
holder.infos = (TextView) convertView.findViewById(R.id.infos);
holder.linear_divers = (LinearLayout) convertView.findViewById(R.id.linear_mis);
holder.linear_infos = (LinearLayout) convertView.findViewById(R.id.linear_infos);
holder.linear_pdf = (LinearLayout) convertView.findViewById(R.id.linear_pdf);
convertView.setTag(holder);
} else {
holder = (CustomListingCrossHolder) convertView.getTag();
}
holder.producer_id.setText(this.listItem.get(position).get("producer_id"));
holder.product_code.setText(this.listItem.get(position).get("product_code"));
holder.begin_hour.setText(this.listItem.get(position).get("begin_hour"));
holder.end_hour.setText(this.listItem.get(position).get("end_hour"));
holder.tel.setText(this.listItem.get(position).get("tel"));
holder.fax.setText(this.listItem.get(position).get("fax"));
holder.adress.setText(this.listItem.get(position).get("adress"));
holder.order.setText(this.listItem.get(position).get("order"));
holder.downtime.setText(this.listItem.get(position).get("downtime"));
holder.miscellaneous.setText(this.listItem.get(position).get("miscellaneous"));
holder.infos.setText(this.listItem.get(position).get("infos"));
/////////Listener to modify miscellaneous parts/////////////
holder.linear_divers.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Log.i("Point ","n°"+object.get("id_point"));
AlertDialog.Builder adb = new AlertDialog.Builder(ctx);
final EditText input = new EditText(ctx);
input.setText(object.get("miscellaneous")+"\n\n");
adb.setView(input);
adb.setTitle("Divers");
adb.setIcon(android.R.drawable.ic_menu_edit);
adb.setPositiveButton("OK", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int whichButton)
{
object.put("miscellaneous", input.getText().toString().trim());
listView.invalidateViews();
asyncTaskSet = new AsyncTaskSet(ctx,object.get("id_point"),input.getText().toString().trim(),"1");
asyncTaskSet.execute();
}
});
adb.setNegativeButton("Annuler", null);
adb.create().show();
}
});
/////////Listener to modify infos parts/////////////
holder.linear_infos.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
AlertDialog.Builder adb = new AlertDialog.Builder(ctx);
final EditText input = new EditText(ctx);
input.setText(object.get("infos")+"\n\n");
adb.setView(input);
adb.setTitle("Infos collecte");
adb.setIcon(android.R.drawable.ic_menu_edit);
adb.setPositiveButton("OK", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int whichButton)
{
object.put("infos", input.getText().toString().trim());
listView.invalidateViews();
asyncTaskSet = new AsyncTaskSet(ctx,object.get("id_point"),input.getText().toString().trim(),"2");
asyncTaskSet.execute();
}
});
adb.setNegativeButton("Annuler", null);
adb.create().show();
}
});
/////////LISTENER TO GO TO THE OTHER ACTIVITY/////////////
holder.linear_pdf.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
AlertDialog.Builder adb = new AlertDialog.Builder(ctx);
adb.setTitle("Edition du PDF");
adb.setIcon(android.R.drawable.ic_menu_info_details);
adb.setMessage("Etes-vous sûr de vouloir éditer ce point de passage ?");
adb.setPositiveButton("OK", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int whichButton)
{
Log.i("Point de passage"," id point : "+ object.get("id_point"));
Intent intentPDF = new Intent(ctx, ViewPdf.class);
intentPDF.putExtra("id_point", object.get("id_point"));
ctx.startActivity(intentPDF);
//it's here where there is the problem//
}
});
adb.setNegativeButton("Annuler", null);
adb.create().show();
}
});
//////////////////////////////////////////////////////////
return convertView;
}
@Override
public int getItemViewType(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public int getViewTypeCount() {
// TODO Auto-generated method stub
return 1;
}
@Override
public boolean isEmpty() {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean areAllItemsEnabled() {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean isEnabled(int position) {
// TODO Auto-generated method stub
return true;
}
@Override
public void registerDataSetObserver(DataSetObserver observer) {
// TODO Auto-generated method stub
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
// TODO Auto-generated method stub
}
private class CustomListingCrossHolder {
TextView producer_id;
TextView adress;
TextView order;
TextView infos;
TextView miscellaneous;
TextView product_code;
TextView begin_hour;
TextView end_hour;
TextView downtime;
TextView fax;
TextView tel;
LinearLayout linear_divers;
LinearLayout linear_infos;
LinearLayout linear_pdf;
}
}
但是，我在03-25 10:15:27.860: E/AndroidRuntime(1924): FATAL EXCEPTION: main
03-25 10:15:27.860: E/AndroidRuntime(1924): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.main/com.pdf.ViewPdf}: java.lang.ClassCastException: com.pdf.ViewPdf cannot be cast to android.app.Activity
03-25 10:15:27.860: E/AndroidRuntime(1924): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1983)
03-25 10:15:27.860: E/AndroidRuntime(1924): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
03-25 10:15:27.860: E/AndroidRuntime(1924): at android.app.ActivityThread.access$600(ActivityThread.java:130)
03-25 10:15:27.860: E/AndroidRuntime(1924): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
03-25 10:15:27.860: E/AndroidRuntime(1924): at android.os.Handler.dispatchMessage(Handler.java:99)
03-25 10:15:27.860: E/AndroidRuntime(1924): at android.os.Looper.loop(Looper.java:137)
03-25 10:15:27.860: E/AndroidRuntime(1924): at android.app.ActivityThread.main(ActivityThread.java:4745)
03-25 10:15:27.860: E/AndroidRuntime(1924): at java.lang.reflect.Method.invokeNative(Native Method)
03-25 10:15:27.860: E/AndroidRuntime(1924): at java.lang.reflect.Method.invoke(Method.java:511)
03-25 10:15:27.860: E/AndroidRuntime(1924): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
03-25 10:15:27.860: E/AndroidRuntime(1924): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-25 10:15:27.860: E/AndroidRuntime(1924): at dalvik.system.NativeStart.main(Native Method)
03-25 10:15:27.860: E/AndroidRuntime(1924): Caused by: java.lang.ClassCastException: com.pdf.ViewPdf cannot be cast to android.app.Activity
03-25 10:15:27.860: E/AndroidRuntime(1924): at android.app.Instrumentation.newActivity(Instrumentation.java:1053)
中执行了相同的代码，以转到与onPostExecute的连接，而不是ListView
答案 0 :(得分：0)
对不起所有人，但我忘了实施我的ViewPdf课......现在，所有的工作井。 因此，如果有人想要创建一个CustomAdapter你可以使用下面提到的代码，如果有人想在使用AlertDialog点击线性布局后直接修改textview，你可以使用下面提到的代码，否则，谢谢你。
我的CustomAdapter类：
package com.listpoint;
import java.util.ArrayList;
import java.util.HashMap;
import com.main.R;
import com.pdf.ViewPdf;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.DataSetObserver;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class CustomListingCrossAdapter implements ListAdapter {
public Integer selectedPosition = null;
public LayoutInflater m_inflater;
public Context ctx;
public ArrayList<HashMap<String, String>> listItem;
public CustomListingCrossHolder holder;
public ListView listView;
public AsyncTaskSet asyncTaskSet;
public CustomListingCrossAdapter(Context newCtx, ArrayList<HashMap<String, String>> newListItem, ListView listView) {
this.ctx = newCtx;
this.listItem = newListItem;
this.m_inflater = (LayoutInflater) this.ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.listView = listView;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return this.listItem.size();
}
@Override
public Object getItem(int position) {
return this.listItem.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final HashMap<String, String> object = (HashMap<String, String>) this.getItem(position);
final ListCrossingPoint listCrossingPointClass = new ListCrossingPoint();
selectedPosition = position;
if (convertView == null) {
holder = new CustomListingCrossHolder();
convertView = m_inflater.inflate(R.layout.list_type_tournee, null);
holder.producer_id = (TextView) convertView.findViewById(R.id.producer_id);
holder.product_code = (TextView) convertView.findViewById(R.id.product_code);
holder.begin_hour = (TextView) convertView.findViewById(R.id.begin_hour);
holder.end_hour = (TextView) convertView.findViewById(R.id.end_hour);
holder.tel = (TextView) convertView.findViewById(R.id.tel);
holder.fax = (TextView) convertView.findViewById(R.id.fax);
holder.adress = (TextView) convertView.findViewById(R.id.adress);
holder.order = (TextView) convertView.findViewById(R.id.order);
holder.downtime = (TextView) convertView.findViewById(R.id.downtime);
holder.miscellaneous = (TextView) convertView.findViewById(R.id.miscellaneous);
holder.infos = (TextView) convertView.findViewById(R.id.infos);
holder.linear_divers = (LinearLayout) convertView.findViewById(R.id.linear_mis);
holder.linear_infos = (LinearLayout) convertView.findViewById(R.id.linear_infos);
holder.linear_pdf = (LinearLayout) convertView.findViewById(R.id.linear_pdf);
convertView.setTag(holder);
} else {
holder = (CustomListingCrossHolder) convertView.getTag();
}
holder.producer_id.setText(this.listItem.get(position).get("producer_id"));
holder.product_code.setText(this.listItem.get(position).get("product_code"));
holder.begin_hour.setText(this.listItem.get(position).get("begin_hour"));
holder.end_hour.setText(this.listItem.get(position).get("end_hour"));
holder.tel.setText(this.listItem.get(position).get("tel"));
holder.fax.setText(this.listItem.get(position).get("fax"));
holder.adress.setText(this.listItem.get(position).get("adress"));
holder.order.setText(this.listItem.get(position).get("order"));
holder.downtime.setText(this.listItem.get(position).get("downtime"));
holder.miscellaneous.setText(this.listItem.get(position).get("miscellaneous"));
holder.infos.setText(this.listItem.get(position).get("infos"));
/////////Listener to modify miscellaneous parts/////////////
holder.linear_divers.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Log.i("Point ","n°"+object.get("id_point"));
AlertDialog.Builder adb = new AlertDialog.Builder(ctx);
final EditText input = new EditText(ctx);
input.setText(object.get("miscellaneous")+"\n\n");
adb.setView(input);
adb.setTitle("Divers");
adb.setIcon(android.R.drawable.ic_menu_edit);
adb.setPositiveButton("OK", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int whichButton)
{
object.put("miscellaneous", input.getText().toString().trim());
listView.invalidateViews();
asyncTaskSet = new AsyncTaskSet(ctx,object.get("id_point"),input.getText().toString().trim(),"1");
asyncTaskSet.execute();
}
});
adb.setNegativeButton("Annuler", null);
adb.create().show();
}
});
/////////Listener to modify infos parts/////////////
holder.linear_infos.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
AlertDialog.Builder adb = new AlertDialog.Builder(ctx);
final EditText input = new EditText(ctx);
input.setText(object.get("infos")+"\n\n");
adb.setView(input);
adb.setTitle("Infos collecte");
adb.setIcon(android.R.drawable.ic_menu_edit);
adb.setPositiveButton("OK", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int whichButton)
{
object.put("infos", input.getText().toString().trim());
listView.invalidateViews();
asyncTaskSet = new AsyncTaskSet(ctx,object.get("id_point"),input.getText().toString().trim(),"2");
asyncTaskSet.execute();
}
});
adb.setNegativeButton("Annuler", null);
adb.create().show();
}
});
/////////LISTENER TO GO TO THE OTHER ACTIVITY/////////////
holder.linear_pdf.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
AlertDialog.Builder adb = new AlertDialog.Builder(ctx);
adb.setTitle("Edition du PDF");
adb.setIcon(android.R.drawable.ic_menu_info_details);
adb.setMessage("Etes-vous sûr de vouloir éditer ce point de passage ?");
adb.setPositiveButton("OK", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int whichButton)
{
Log.i("Point de passage"," id point : "+ object.get("id_point"));
Intent intentPDF = new Intent(ctx, ViewPdf.class);
intentPDF.putExtra("id_point", object.get("id_point"));
ctx.startActivity(intentPDF);
//it's here where there is the problem//
}
});
adb.setNegativeButton("Annuler", null);
adb.create().show();
}
});
//////////////////////////////////////////////////////////
return convertView;
}
@Override
public int getItemViewType(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public int getViewTypeCount() {
// TODO Auto-generated method stub
return 1;
}
@Override
public boolean isEmpty() {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean areAllItemsEnabled() {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean isEnabled(int position) {
// TODO Auto-generated method stub
return true;
}
@Override
public void registerDataSetObserver(DataSetObserver observer) {
// TODO Auto-generated method stub
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
// TODO Auto-generated method stub
}
private class CustomListingCrossHolder {
TextView producer_id;
TextView adress;
TextView order;
TextView infos;
TextView miscellaneous;
TextView product_code;
TextView begin_hour;
TextView end_hour;
TextView downtime;
TextView fax;
TextView tel;
LinearLayout linear_divers;
LinearLayout linear_infos;
LinearLayout linear_pdf;
}
}