小编use*_*855的帖子

在我的应用程序中,我想更改列表视图文本颜色.在这种情况下,我使用XML文件进行列表视图.可能吗？如果是,那么举个例子.

gender.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical"
 android:background="@drawable/topelg"
 >

      <ListView
        android:id="@+id/android:list"
        android:layout_marginTop="60dip"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:textColor="#000000"

        />

</LinearLayout>

Egender.java

package com.Elgifto;

import android.app.ListActivity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.ListView;

public class Egender extends ListActivity{
    Button b1;
    ListView lv;

     /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.gender);

       // b1=(Button) findViewById(R.id.butt1);
        b1=new Button(this);
        b1.setText("Done");

       //b1.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); …

在我的应用程序中,我动态获取字符串值 我想将这些值分配给字符串数组然后打印这些值.但它显示一个错误(空指针异常)EX:

String[] content = null;
for (int s = 0; s < lst.getLength(); s++) {
    String st1 = null;
    org.w3c.dom.Node nd = lst.item(s);
    if (nd.getNodeType() == org.w3c.dom.Node.ELEMENT_NODE) {
        NamedNodeMap nnm = nd.getAttributes();

        for (int i = 0; i < 1; i++) {
            st1 = ((org.w3c.dom.Node) nnm.item(i)).getNodeValue().toString();
        }
    }

    content[s] = st1;
    //HERE it shows null pointer Exception.
}  

谢谢

在我的应用程序中,当您单击时会出现一个按钮,将出现一个警报对话框.该警报对话框由单选列表项组成.这里我想设置单选项列表项的文本大小.可能吗？如果是的话怎么做

以下是我的代码

sclist.java

package com.examples.scl;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class sclist extends Activity {

 private static final int DIALOG_SINGLE_CHOICE = 1;


  @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case DIALOG_SINGLE_CHOICE:
            return new AlertDialog.Builder(sclist.this)
                .setIcon(R.drawable.alert_dialog_icon)
                .setTitle("Single choice list")
                .setSingleChoiceItems(R.array.select_dialog_items2, 0, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {

                        /* User clicked on a radio button do some stuff */
                    }
                })
                .setPositiveButton("ok", new DialogInterface.OnClickListener() …