当你点击该项目时,它应该带你到其他屏幕,但如果条件错误?

时间:2011-11-05 01:59:12

标签: android

package com.example.Calc;

import android.R.string;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class modes extends ListActivity {


/** Called when the activity is first created. */

    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        // Create an array of Strings, that will be put to our ListActivity
        String[] names = new String[] { "Simple Calculator", "Tip Calculator", "Mortgage Calculator", "BMI",
                "GPA Calculator"};
        // Create an ArrayAdapter, that will actually make the Strings above
        // appear in the ListView
        this.setListAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, names));
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
        string content;
        if( content ="Simple Calculator")
        {
             // When clicked, Open the Next Screen
             Intent r=new Intent(modes.this ,simplecalculator.class );
        }
    }
}

获取错误if(content =“simple calculator”) 我想当我点击简单的计算器它应该把我带到其他屏幕..我已经定义了一切,但我忘了if条件事情......一切都已完成..它只是条件如果.. 请帮忙,谢谢你的时间。

2 个答案:

答案 0 :(得分:0)

我认为您需要if (content.equals("Simple Calculator")),而不是if (content = "Simple Calculator")

答案 1 :(得分:0)

protected void onListItemClick(ListView l, View v, int position, long id) {

    String content = ((ArrayAdapter<String>)l.getAdapter()).getItem(position);
    if( content.equals("Simple Calculator"))
    {
         // When clicked, Open the Next Screen
         Intent r=new Intent(this ,simplecalculator.class );
         startActivity(r);
    }
}

一些事情:

1)请使用CamelCase作为您的班级名称。

2)字符串以一个大写字母开头(因为应该所有Java类)。

就是这样。