传递一个列表到Android的另一个活动 [英] Passing a List to another Activity in Android
本文介绍了传递一个列表到Android的另一个活动的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我已经创建了一个清单,并希望列表传递到另一个活动,但我发现在putExtra声明一个错误,当我创建的意图。只是想知道有没有什么简单的方法来传递字符串列表,而不是一个单独的字符串?
感谢
私人列表<字符串> selItemList;
私人的ListView mainListView = NULL;
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.recipes);
按钮searchBtn =(按钮)findViewById(R.id.searchButton);
searchBtn.setOnClickListener(新OnClickListener(){
公共无效的onClick(视图v){
如果(selItemList == NULL){
Toast.makeText(getApplicationContext(),请进行选择,Toast.LENGTH_SHORT).show();
} 其他 {
意向意图=新的意图(Recipes2.this,XMLParser.class);
intent.putExtra(items_to_parse,selItemList);
startActivityForResult(意向,0);
}
}
});
解决方案
你不能传递Intent.putExtras列表(字符串名称,列出清单); 我想你可以使用一个String数组,并通过它putExtras是这样的:
私人列表<字符串> selItemList;
私人的ListView mainListView = NULL;
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.recipes);
按钮searchBtn =(按钮)findViewById(R.id.searchButton);
searchBtn.setOnClickListener(新OnClickListener(){
公共无效的onClick(视图v){
如果(selItemList == NULL){
Toast.makeText(getApplicationContext(),请进行选择,Toast.LENGTH_SHORT).show();
} 其他 {
的String [] selItemArray =新的String [selItemList.size()];
//复制你的字符串列表到数组,然后通过它在你的意图
// ....
意向意图=新的意图(Recipes2.this,XMLParser.class);
intent.putExtra(items_to_parse,selItemArray);
startActivityForResult(意向,0);
}
}
});
I've created a list and would like to pass the list to another activity but i'm getting an error on the putExtra statement when i create the intent. Just wondering is there any easy way to pass a List of Strings rather than a single String?
Thanks
private List<String> selItemList;
private ListView mainListView = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recipes);
Button searchBtn = (Button) findViewById(R.id.searchButton);
searchBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (selItemList == null) {
Toast.makeText(getApplicationContext()," Please Make A Selection ", Toast.LENGTH_SHORT).show();
} else {
Intent intent = new Intent(Recipes2.this, XMLParser.class);
intent.putExtra("items_to_parse", selItemList);
startActivityForResult(intent, 0);
}
}
});
解决方案
you can't pass a List in Intent.putExtras( String name,List list) ; i think you can use an Array of String and pass it in putExtras like This :
private List<String> selItemList;
private ListView mainListView = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recipes);
Button searchBtn = (Button) findViewById(R.id.searchButton);
searchBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (selItemList == null) {
Toast.makeText(getApplicationContext()," Please Make A Selection ", Toast.LENGTH_SHORT).show();
} else {
String[] selItemArray = new String[selItemList.size()];
//copy your List of Strings into the Array ,and then pass it in your intent
// ....
Intent intent = new Intent(Recipes2.this, XMLParser.class);
intent.putExtra("items_to_parse", selItemArray);
startActivityForResult(intent, 0);
}
}
});
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