问题描述
|
我在对话框布局上放置了一个按钮，希望触发对话框的完全重绘。但是，看来您无法从onCreateDialog内打开对话框，而且我找不到不使用
setPositiveButton
case DIALOG_WIFI_PREF:
{
Dialog dialog = new Dialog(this);
final View dialogLayout = inflater.inflate(R.layout.dialog_wifi_pref,null);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setView(dialogLayout);
builder.setTitle(\"IP Configuration\");
final EditText ipIn = (EditText)dialogLayout.findViewById(R.id.wifi_ip_in);
final EditText portIn = (EditText)dialogLayout.findViewById(R.id.wifi_port_in);
final EditText labelIn = (EditText)dialogLayout.findViewById(R.id.site_label_in);
final EditText codeIn = (EditText)dialogLayout.findViewById(R.id.activation_code);
final Spinner siteSpn = (Spinner)dialogLayout.findViewById(R.id.site_spn);
final Button deleteBtn = (Button)dialogLayout.findViewById(R.id.delete_btn);
final Cursor cur = mDb.rawQuery(\"SELECT * FROM \" + DbSchema.SiteSchema.TABLE_NAME,null);
cur.movetoFirst();
final SimpleCursorAdapter tempAdapter = new SimpleCursorAdapter(
this,android.R.layout.simple_spinner_item,cur,new String[] { DbSchema.SiteSchema.COLUMN_LABEL },new int[] { android.R.id.text1 }
);
tempAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
siteSpn.setAdapter(tempAdapter);
//fill the initial values
String initSite = pref.getString(\"site_id\",\"New Site\");
String spnLabel = null;
final Cursor initCur = mDb.query(DbSchema.SiteSchema.TABLE_NAME,null,DbSchema.SiteSchema.COLUMN_LABEL + \"=?\",new String[] { initSite },null);
initCur.movetoFirst();
cur.movetoFirst();
if(initCur.getCount()>0) {
ipIn.setText(initCur.getString(initCur.getColumnIndex(DbSchema.SiteSchema.COLUMN_IP)));
portIn.setText(initCur.getString(initCur.getColumnIndex(DbSchema.SiteSchema.COLUMN_PORT)));
codeIn.setText(initCur.getString(initCur.getColumnIndex(DbSchema.SiteSchema.COLUMN_ACTIVATION_CODE)));
spnLabel = initCur.getString(initCur.getColumnIndex(DbSchema.SiteSchema.COLUMN_LABEL));
labelIn.setText(spnLabel);
if(cur.getCount()>0) {
do {
if(spnLabel.equals(cur.getString(cur.getColumnIndex(DbSchema.SiteSchema.COLUMN_LABEL)))) {
siteSpn.setSelection(cur.getPosition());
}
} while(cur.movetoNext());
}
}
siteSpn.setonItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent,View view,int position,long id) {
cur.movetoFirst();
if(cur.getCount()>0) {
do {
String tempLabel = cur.getString(cur.getColumnIndex(DbSchema.SiteSchema.COLUMN_LABEL));
if(tempLabel.equals(((TextView)view.findViewById(android.R.id.text1)).getText().toString())) {
labelIn.setText(tempLabel);
portIn.setText(cur.getString(cur.getColumnIndex(DbSchema.SiteSchema.COLUMN_PORT)));
ipIn.setText(cur.getString(cur.getColumnIndex(DbSchema.SiteSchema.COLUMN_IP)));
codeIn.setText(cur.getString(cur.getColumnIndex(DbSchema.SiteSchema.COLUMN_ACTIVATION_CODE)));
}
} while(cur.movetoNext());
}
}
public void onnothingSelected(AdapterView<?> parent) {
//
}
});
deleteBtn.setonClickListener(new View.OnClickListener() {
public void onClick(View v) {
//do things
cur.movetoFirst();
while(cur.movetoNext()) {
String tempLabel = cur.getString(cur.getColumnIndex(DbSchema.SiteSchema.COLUMN_LABEL));
View selectedSiteView = siteSpn.getSelectedView();
String label = ((TextView)selectedSiteView.findViewById(android.R.id.text1)).getText().toString();
if(tempLabel.equals(label)) {
mDb.delete(DbSchema.SiteSchema.TABLE_NAME,DbSchema.SiteSchema.COLUMN_LABEL+\"=?\",new String[] { label });
//dialogLayout.invalidate();
//dialog.dismiss();
//dialog.invalidate();
//v.getParent().invalidate();
}
}
}
});
builder.setPositiveButton(\"Save\",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
cur.movetoFirst();
boolean newRecord = true;
do {
String tempLabel = null;
if(cur.getCount()>0) {
tempLabel = cur.getString(cur.getColumnIndex(DbSchema.SiteSchema.COLUMN_LABEL));
}
if(tempLabel!=null && tempLabel.equals(labelIn.getText().toString())) {
//update
ContentValues cv = new ContentValues();
cv.put(DbSchema.SiteSchema.COLUMN_IP,ipIn.getText().toString());
cv.put(DbSchema.SiteSchema.COLUMN_PORT,portIn.getText().toString());
cv.put(DbSchema.SiteSchema.COLUMN_ACTIVATION_CODE,codeIn.getText().toString());
MobileDashboardActivity.this.mDb.update(DbSchema.SiteSchema.TABLE_NAME,cv,new String[] { tempLabel });
newRecord = false;
break;
}
} while(cur.movetoNext());
if(newRecord) {
//new entry
ContentValues cv = new ContentValues();
cv.put(DbSchema.SiteSchema.COLUMN_IP,ipIn.getText().toString());
cv.put(DbSchema.SiteSchema.COLUMN_PORT,portIn.getText().toString());
cv.put(DbSchema.SiteSchema.COLUMN_LABEL,labelIn.getText().toString());
cv.put(DbSchema.SiteSchema.COLUMN_ACTIVATION_CODE,codeIn.getText().toString());
MobileDashboardActivity.this.mDb.insert(DbSchema.SiteSchema.TABLE_NAME,cv);
}
SharedPreferences.Editor editor = pref.edit();
editor.putString(\"site_id\",labelIn.getText().toString());
editor.putString(\"activation\",codeIn.getText().toString());
editor.commit();
MobileDashboardActivity.this.writeCSVFile(\"dashboard_settings.csv\");
dialog.dismiss();
}
});
builder.setNegativeButton(\"Cancel\",int id) {
dialog.cancel();
}
});
dialog = builder.create();
return dialog;
}
解决方法
我最终遵循以下示例：
http://developmentality.wordpress.com/2009/10/31/android-dialog-box-tutorial/
它使用命令模式来触发外部逻辑：
http://en.wikipedia.org/wiki/Command_pattern
这是文件：
Command.java：
package com.conceptualsystems.dialog;
[...import statements...]
public interface Command {
public void execute();
public static final Command NO_OP = new Command() { public void execute() {} };
}
package com.conceptualsystems.dialog;
[...import statements...]
public class CommandWrapper implements DialogInterface.OnClickListener {
private Command command;
public CommandWrapper(Command command) {
this.command = command;
}
public void execute() {
command.execute();
}
@Override
public void onClick(DialogInterface dialog,int which) {
dialog.dismiss();
command.execute();
}
}
Command delete = new Command() {
public void execute() {
removeDialog(DIALOG_WIFI_PREF);
showDialog(DIALOG_WIFI_PREF);
}
};
builder.setNeutralButton(\"Delete\",new CommandWrapper(delete) {
public void onClick(DialogInterface dialog,int which) {
//do things
cur.moveToFirst();
while(cur.moveToNext()) {
String tempLabel = cur.getString(cur.getColumnIndex(DbSchema.SiteSchema.COLUMN_LABEL));
View selectedSiteView = siteSpn.getSelectedView();
String label = ((TextView)selectedSiteView.findViewById(android.R.id.text1)).getText().toString();
if(tempLabel.equals(label)) {
mDb.delete(DbSchema.SiteSchema.TABLE_NAME,DbSchema.SiteSchema.COLUMN_LABEL+\"=?\",new String[] { label });
}
}
dialog.dismiss();
this.execute();
}
});