我编写了一个大代码,并且在我的一个任务布局中使用了一个列表视图:
我想知道在这种情况下如何为每个更新按钮创建一个侦听器以便移动到另一个活动,我知道如何使用多个活动并在它们之间移动但我想知道如何只创建一个侦听器。
自定义适配器代码:
package com.example.task_9;
import java.util.ArrayList;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class TempLyaout extends ArrayAdapter<String> {
Context context;
ArrayList<String> sa;
public TempLyaout(Context context , ArrayList<String> sa) {
super(context,R.layout.temp,sa);
this.context=context;
this.sa = sa;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater l = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
View rowView = l.inflate(R.layout.temp, parent, false);
TextView textView = (TextView) rowView.findViewById(R.id.textView1);
ImageView imageView = (ImageView) rowView.findViewById(R.id.imageView1);
Button update = (Button) rowView.findViewById(R.id.button1);
// myDb.open();
// Cursor cursor= myDb.getRowByName(sa.get(position));
// myDb.updateRowByName(cursor.getInt(DBAdapter.COL_ROWID), sa.get(position), cursor.getString(DBAdapter.COL_PASSWD), cursor.getInt(DBAdapter.COL_AGE), isAdmin);
// myDb.close();
textView.setText(sa.get(position));
return rowView;
}
}
这是相关的类:
package com.example.task_9;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class UsersActivity extends Activity {
Intent redirect;
ListView list;
ArrayList<String> sa;
DBAdapter myDb;
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
@Override
protected void onStart() {
super.onStart();
setContentView(R.layout.users);
list= (ListView) findViewById(R.id.usersList);
redirect = getIntent();
openDB();
/*********************************************/
Cursor cursor = myDb.getAllRows();
cursor.moveToFirst();
ArrayList<String> ha = new ArrayList<String>();
while(cursor.moveToNext()) {
ha.add(cursor.getString(DBAdapter.COL_NAME));
}
cursor.close();
@SuppressWarnings("rawtypes")
ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,ha);
list.setAdapter(new TempLyaout(UsersActivity.this,ha));
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(getApplicationContext(),
"Click ListItem Number " + position, Toast.LENGTH_LONG)
.show();
}
});
} // end onStart method
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
@Override
protected void onDestroy() {
super.onDestroy();
closeDB();
}// end onDestroy method
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
private void openDB() {
myDb = new DBAdapter(this);
myDb.open();
} // end openDB method
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
private void closeDB() {
myDb.close();
} // end closeDB method
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
}// end main class