列表视图选项来启动一个新的活动 [英] List View selection to start a new Activity
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问题描述
所以,我正与一个列表视图试图获得当某个项目被选中具体活动开。这是code说我有工作现在。我知道它错了,但我不知道我需要去改变它,使其工作。我想我需要一个意图,并尝试了一些想法,但并没有拿出多少。谢谢你。
包table.periodic;
进口android.app.ListActivity;
进口android.os.Bundle;
进口android.view.View;
进口android.widget.ArrayAdapter;
进口android.widget.ListView;
公共类列表扩展ListActivity {
的String []元素= {锕,铝,镅
锑,氩,砒霜,砹,钡,
锫,铍,铋,bohrium,硼,
溴,镉,补钙,锎,低碳,
铈,铯,氯,铬,钴,
铜,copernicium,锔,darmstadtium,dubnium,
镝,锿,铒,铕,镄,
氟,钫,钆,镓,锗,
金,铪,hassium,氦,钬,
氢,铟,碘,铱,铁,
氪,镧,铹,领导,锂,
镥,镁,锰,meitnerium,钔,
汞,钼,钕,氖,镎,
镍,铌,氮,锘,锇,
氧,钯,磷,铂,钚,
钋,钾,镨,钷,镤,
镭,氡,铼,铑,roentgenium,铷,
钌,rutherfordium,钐,钪,seaborgium,
硒,硅,银,钠,锶,硫,
钽,锝,碲,铽,铊,钍,
铥,锡,钛,钨都,ununhexium,ununoctium
ununpentium,ununquadium,ununseptium,ununtrium,铀,
钒,氙,镱,钇,锌,氧化锆};
公共无效的onCreate(包冰柱){
super.onCreate(冰柱);
的setContentView(R.layout.list);
setListAdapter(新ArrayAdapter<字符串>(
对此,android.R.layout.simple_list_item_1,
元素));
}
公共无效onListItemClick(ListView的父,视图V,INT位置,
长ID){
如果(锕.equals(元素[位置]))
{startActivity(Actinium.class);}
否则,如果(铝.equals(元素[位置]))
{startActivity(Aluminum.class);}
}
解决方案
我已经编辑你的codeA位。您需要在您的布局XML文件中创建一个的ListView
元素,然后在你的Java文件,发现它使用 findViewById
进口android.app.Activity;
进口android.os.Bundle;
进口android.view.View;
进口android.widget.ArrayAdapter;
进口android.widget.ListView;
公共类List延伸活动{
的String []元素= {...}; //(略更好的可读性)
公共无效的onCreate(包冰柱){
super.onCreate(冰柱);
的setContentView(R.layout.main);
ListView的LV =(ListView控件)findViewById(R.id.ListView01);
lv.setAdapter(新ArrayAdapter<字符串>(
对此,android.R.layout.simple_list_item_1,
元素));
}
公共无效onListItemClick(ListView的父,视图V,INT位置,
长ID){
//如果(锕.equals(元素[位置]))
// {startActivity(Actinium.class);}
//否则如果(铝.equals(元素[位置]))
// {startActivity(Aluminum.class);}
}
}
So I'm working with a list view trying to get specific activities to open when a certain item is selected. This is the code that I'm working with right now. I know its wrong but am not sure what I need to change it make it work. I think I need an intent and tried a few ideas but did not come up with much. Thanks.
package table.periodic;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class List extends ListActivity{
String[] elements={"actinium", "aluminum", "americium",
"antimony", "argon", "arsenic", "astatine", "barium",
"berkelium", "beryllium", "bismuth", "bohrium", "boron",
"bromine", "cadmium", "calcium", "californium", "carbon",
"cerium", "cesium", "chlorine", "chromium", "cobalt",
"copper", "copernicium", "curium", "darmstadtium", "dubnium",
"dysprosium", "einsteinium", "erbium", "europium", "fermium",
"fluorine", "francium", "gadolinium", "gallium", "germanium",
"gold", "hafnium", "hassium", "helium", "holmium",
"hydrogen", "indium", "iodine", "iridium", "iron",
"krypton", "lanthanum", "lawrencium", "lead", "lithium",
"lutetium", "magnesium", "manganese", "meitnerium", "mendelevium",
"mercury", "molybdenum", "neodymium", "neon", "neptunium",
"nickel", "niobium", "nitrogen", "nobelium", "osmium",
"oxygen", "palladium", "phosphorus", "platinum", "plutonium",
"polonium", "potassium", "praseodymium", "promethium", "protactinium",
"radium", "radon", "rhenium", "rhodium", "roentgenium", "rubidium",
"ruthenium", "rutherfordium", "samarium", "scandium", "seaborgium",
"selenium", "silicon", "silver", "sodium", "strontium", "sulfur",
"tantalum", "technetium", "tellurium", "terbium", "thallium", "thorium",
"thulium", "tin", "titanium", "tungsten", "ununhexium", "ununoctium",
"ununpentium", "ununquadium", "ununseptium", "ununtrium", "uranium",
"vanadium", "xenon", "ytterbium", "yttrium", "zinc", "zirconium"};
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.list);
setListAdapter(new ArrayAdapter<String>(
this, android.R.layout.simple_list_item_1,
elements));
}
public void onListItemClick(ListView parent, View v, int position,
long id){
if ("actinium".equals(elements[position]))
{startActivity(Actinium.class);}
else if ("aluminum".equals(elements[position]))
{startActivity(Aluminum.class);}
}
解决方案
I've edited your code a bit. You need to create one ListView
element in your layout XML file, and then in your Java file, find it using findViewById
:
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class List extends Activity {
String[] elements = { … }; // (omitted for better legibility)
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
ListView lv = (ListView)findViewById(R.id.ListView01);
lv.setAdapter(new ArrayAdapter<String>(
this, android.R.layout.simple_list_item_1,
elements));
}
public void onListItemClick(ListView parent, View v, int position,
long id) {
//if ("actinium".equals(elements[position]))
// {startActivity(Actinium.class);}
//else if ("aluminum".equals(elements[position]))
// {startActivity(Aluminum.class);}
}
}
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