Question

我想将活动显示为对话框，但此对话框将显示从数据库动态填充的布局，但我没有得到任何结果。

package chintan.khetiya.sqlite.cursor;


import java.util.ArrayList;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class lista extends Activity {

    private ListView lista; 
    DatabaseHandler db;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.listado);

        //SE HACE TODO EL PROCESO EJECUTANDO UNA FUNCION

        Refresh();

        lista.setOnItemClickListener(new AdapterView.OnItemClickListener(){
            @Override
            public void onItemClick(AdapterView<?> parent, View view, final int position,long id) {

                       final int selected_row = position;

                       final String cliente = DameCliente(selected_row);
                       final int limite = DameConteo();
                       int i;

                       AlertDialog.Builder myDialog 
                       = new AlertDialog.Builder(lista.this);

我的问题在这里

LinearLayout linear = (LinearLayout) findViewById(R.id.generar_text);
TextView text = new TextView(lista.this);
text.setText("hola");

当然这是一个考验。我会做一个循环来创建更多的文本视图，但我需要构建第一个，然后循环更多。

LayoutInflater inflater = getLayoutInflater();
myDialog.setView(inflater.inflate(R.layout.dialog, null));
myDialog.setTitle(cliente);
myDialog.setPositiveButton("Aceptar", new DialogInterface.OnClickListener() {
    // do something when the button is clicked
    public void onClick(DialogInterface arg0, int arg1) {
    }
});
myDialog.setNeutralButton("Eliminar Pedido", new DialogInterface.OnClickListener() {
    // do something when the button is clicked
    public void onClick(DialogInterface arg0, int arg1) {
        final int eliminar = selected_row + 1;
        AlertDialog.Builder dialogoDentro = new AlertDialog.Builder(lista.this);
        dialogoDentro.setTitle("Alerta !");
        dialogoDentro.setMessage("Eliminar el Pedido ?");
        dialogoDentro.setNeutralButton("Eliminar", new DialogInterface.OnClickListener( {
             // do something when the button is clicked
             public void onClick(DialogInterface arg0, int arg1) {
                 db.Delete_Pedido(eliminar);
                 lista.this.Refresh();
             }
        });
        dialogoDentro.setNegativeButton("Cancelar", new DialogInterface.OnClickListener() {
            // do something when the button is clicked
            public void onClick(DialogInterface arg0, int arg1) {
            }
        });
        dialogoDentro.show();
    }
});
myDialog.show();
}
});
}

public void Refresh(){
    int limite = DameConteo();// numero de columnas insertadas como productos
    int numero_pedidos = NumeroPedidos();



        //Toast.makeText(getApplicationContext(),  "Valor Columna: " + ValorColumna(columna) + " -- Columna: " + columna + " -- Precio : " + ValorPrecio(columna), Toast.LENGTH_SHORT).show();

        ArrayList<lista_entrada> datos = new ArrayList<lista_entrada>();  

        for (int a = 1; a <= numero_pedidos;a ++){

            String pedidor = InfoPedidos(a).getString(1);
            float iva = (float) 1.16;
            int articulos = 0;
            float subtotal = 0;
            float total = 0;

                for (int b=0; b<limite; b++){
                String columna = DameColumna(b).toString();
                articulos = articulos + ValorColumna(columna,a);
                subtotal = subtotal +  (ValorColumna(columna,a)*(ValorPrecio(columna)));
                total = total + (float) (((ValorColumna(columna,a)*(ValorPrecio(columna)))) * iva);
                }

                datos.add(new lista_entrada(pedidor,"Pedido: " + articulos + " artículos", "Subtotal: $" + String.format("%.2f", subtotal), "Total: $" + String.format("%.2f", total)));
                //}
        }

        lista = (ListView) findViewById(R.id.ListView_listado);
        lista.setAdapter(new lista_adaptador(this, R.layout.entrada, datos){
            @Override
            public void onEntrada(Object entrada, View view) {
                if (entrada != null) {
                    TextView nombre = (TextView) view.findViewById(R.id.nombre); 
                    if (nombre != null) 
                        nombre.setText(((lista_entrada) entrada).getNombre()); 

                    TextView articulos = (TextView) view.findViewById(R.id.articulos); 
                    if (articulos != null)
                        articulos.setText(((lista_entrada) entrada).getArticulos()); 

                    TextView subtotal = (TextView) view.findViewById(R.id.subtotal); 
                    if (subtotal != null)
                        subtotal.setText(((lista_entrada) entrada).getSubtotal());

                    TextView total = (TextView) view.findViewById(R.id.total); 
                    if (total != null)
                        total.setText(((lista_entrada) entrada).getTotal());
                }
            }
        });

    }

    @Override
    public void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        Refresh();

        }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) { 
            case R.id.Clientes:
                finish();
                startActivity(new Intent(this, Main_Screen.class));
                return true;

            case R.id.Productos:
                finish();
                startActivity(new Intent(this, Product_Screen.class));
                return true;

            case R.id.Nuevo_Pedido:
                finish();
                startActivity(new Intent(this, home_screen.class));
                return true;

            case R.id.listado_pedidos:
                finish();
                startActivity(new Intent(this, lista.class));
                return true;    

            case R.id.salir:
                finish();
                return true;
            default:
        return super.onOptionsItemSelected(item);
    }
    }

 public String DameCliente(int contact_name){

        //product_data.clear();
    db = new DatabaseHandler(this);
        ArrayList<Pedido> pedido_array_from_db = db.Get_Pedido();

        String cte_name = pedido_array_from_db.get(contact_name).get_contact_name();
        return cte_name;
    }

 public int DameConteo(){

     db = new DatabaseHandler(this);
     int conteo = db.Get_Total_Products();
     return conteo;
 }

 public int NumeroPedidos(){

     db = new DatabaseHandler(this);
     int numero = db.Get_Total_Pedido();
     return numero;
 }

 public Cursor InfoPedidos(int id){

     db = new DatabaseHandler(this);
     Cursor cursor = db.Get_Pedido(id);
     return cursor;

 }

 public String DameColumna(int columna_id){
     db = new DatabaseHandler(this);
     ArrayList<Columna> columna_array_from_db = db.Get_Columna();

     String columna = columna_array_from_db.get(columna_id).get_columnaName();
     return columna;

 }

 public int ValorColumna(String columna, int a){
     String valor_a = String.valueOf(a);
     db = new DatabaseHandler(this);
     int valor = db.get_valor_columna(columna,valor_a);
     return valor;

 }

 public float ValorPrecio(String columna){
     db = new DatabaseHandler(this);
     float valor = db.get_valor_precio(columna);
     return valor;

 }


}

Answer 1

试试这个。

更改

LinearLayout linear = (LinearLayout) findViewById(R.id.generar_text);
TextView text = new TextView(lista.this);
text.setText("hola");
LayoutInflater inflater = getLayoutInflater();
myDialog.setView(inflater.inflate(R.layout.dialog, null));

到

LayoutInflater inflater = getLayoutInflater();

View view = inflater.inflate(R.layout.dialog, null);
LinearLayout linear = (LinearLayout) view.findViewById(R.id.generar_text);

TextView text = new TextView(this);
text.setText("hola");
linear.addView(text);
myDialog.setView(view);

Answer 2

改变这个：

LinearLayout linear = (LinearLayout) findViewById(R.id.generar_text);
TextView text = new TextView(lista.this);
text.setText("hola");

为：

AlertDialog dialog=myDialog.create();
LinearLayout linear = (LinearLayout) dialog.findViewById(R.id.generar_text);
TextView text = new TextView(lista.this);
text.setText("hola");
dialog.show();

Answer 3

如果要将View动态添加到ViewGroup（例如LinearLayout），最简单的方法是在单独的布局xml文件中定义View（例如TextView）。

例如

<?xml version="1.0" encoding="utf-8"?>
<TextView
    android:id="@id/label"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:lines="1"
    android:textIsSelectable="true"
    android:textAppearance="?android:attr/textAppearanceSmall" 
 />

存储为 /res/layout/mytextview.xml

现在，在代码中，您希望动态地放置视图而不是通过findViewById查找一个视图，每次视图的新实例都会膨胀，例如：

LayoutInflater inflater = getLayoutInflater();
LinearLayout rootView = (LinearLayout) view.findViewById(R.id.rootView);

for( int i=0; i < 5; ++i )
{
     TextView mytextview = (TextView) inflater.inflate(R.layout.textview, null);
     mytextview.setText("hola");
     rootView.addView(mytextview);
}

注意：如果您这样做，您可以在XML中为要多次动态添加的视图设置所有样式和内容。这可以使您免于大量编写，因为在代码中定义View的外观涉及比XML中所需的更多“写入”。

动态添加textview而没有结果

3 个答案: