通过创建一个随机字符串从数组的Andr​​oid对话警报 [英] Creating a dialogue alert using a random string from a array Android

问题描述

我想codeA应用程序的Andr​​iod（使用eclipse），其中当的ImageButton为presses一个alertdialouge出现从一个随机字符串和数组，每个按钮是pressed时间我想它改变从数组中的字符串。我有$ C $光盘alertdialouge有的code它得到一个随机字符串，但它确实为文本视图，而不是警报的台词。能否请您看看我的code和告诉我，我需要改变吗？

 包kevin.erica.box;进口android.app.Activity;
进口android.app.AlertDialog;
进口android.os.Bundle;
进口android.view.View;
进口android.widget.TextView;
进口了java.util.Random;公共类TheKevinAndEricaBoxActivity延伸活动{
/ **当第一次创建活动调用。 * /
私有String [] myString的;
私人字符串列表;
私有静态最终随机rgenerator =新的随机（）;@覆盖
公共无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.main）;    资源解析度= getResources（）;    myString的= res.getStringArray（R.array.myArray）;    列表=的myString [rgenerator.nextInt（myString.length）];    TextView的电视=（的TextView）findViewById（R.id.textView1）;
    tv.setText（名单）;
}公共无效凯文（查看视图）
{
新AlertDialog.Builder（本）.setTitle（箱子）setMessage（getResources（）的getText（R.string.list）。）setNeutralButton（关闭，NULL）.show（）; }
}
 

解决方案

据我了解，你需要从当特定的ImageButton是pressed阵列显示随机选择的文本字符串。

请尝试以下code：

  @覆盖
公共无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.main）;
    资源解析度= getResources（）;   myString的= res.getStringArray（R.array.myArray）;   列表=的myString [rgenerator.nextInt（myString.length）];   的ImageButton IB =（的ImageButton）findViewById（R.id.img_button_id）;
   ib.setOnClickListener（新OnClickListener（）{
       @覆盖
       公共无效的onClick（查看为arg0）{
           AlertDialog.Builder B =新AlertDialog.Builder（TheKevinAndEricaBoxActivity.this）;
           b.setMessage（myString的[rgenerator.nextInt（myString.length）]）;
           对话D = b.create（）;
           d.show（）;
       }
   }）;
}
 

I'm trying to code a application for andriod (using eclipse) in which when a imagebutton is presses a alertdialouge comes up with a random string from and array, each time the button is pressed i would like it to change the string from the array. I have coded a alertdialouge and some code which gets a random string but it does it to a text-view instead of a alert dialouge. Can you please have a look at my code and tell me what i need to change?

package kevin.erica.box;

import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import java.util.Random;

public class TheKevinAndEricaBoxActivity extends Activity {
/** Called when the activity is first created. */
private String[] myString;
private String list;
private static final Random rgenerator = new Random();

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Resources res = getResources();

    myString = res.getStringArray(R.array.myArray); 

    list = myString[rgenerator.nextInt(myString.length)];

    TextView tv = (TextView) findViewById(R.id.textView1);
    tv.setText(list);
}

public void kevin(View view)
{
new AlertDialog.Builder(this).setTitle("The Box").setMessage(getResources().getText(R.string.list)).setNeutralButton("Close", null).show(); }
}

解决方案

As I understand, you need to display a randomly selected text string from an array whenever a particular ImageButton is pressed.

Try the following code:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Resources res = getResources();

   myString = res.getStringArray(R.array.myArray); 

   list = myString[rgenerator.nextInt(myString.length)];

   ImageButton ib = (ImageButton) findViewById(R.id.img_button_id);
   ib.setOnClickListener(new OnClickListener() {
       @Override
       public void onClick(View arg0) {
           AlertDialog.Builder b = new AlertDialog.Builder(TheKevinAndEricaBoxActivity.this);
           b.setMessage(myString[rgenerator.nextInt(myString.length)]);
           Dialog d = b.create();
           d.show();
       }
   });
}

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