Java 如何使用 putStringArrayListExtra() 传递 ArrayList
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4030115/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to pass ArrayList using putStringArrayListExtra()
提问by Miya
Hi I want to pass an Arraylistfrom one activityto another. I use putStringArrayListExtra(), but there shows an error : "The method putStringArrayListExtra(String,ArrayList is undefined for the type bundle."Is there any other method available for passing ArrayList?
嗨，我想Arraylist从一个传递activity到另一个。我使用putStringArrayListExtra()，但显示错误："The method putStringArrayListExtra(String,ArrayList is undefined for the type bundle."是否还有其他方法可供传递ArrayList？
String test[]=new String[3];
ArrayList<String[]> al=new ArrayList<String[]>();
int x,y;
test[0]="1";
test[1]="2";
test[2]="3";
al.add(test);
test = new String[3];
test[0]="4";
test[1]="5";
test[2]="6";
al.add(test);
Bundle list_bundle=new Bundle();
list_bundle.putStringArrayListExtra("lists",al);
Intent list_intent= new Intent(v.getContext(), view_all_selected.class);
list_intent.putExtras(list_bundle);
startActivityForResult(list_intent, 2);
采纳答案by Maneesh
try below one to pass 1-D array to Arraylist in extras
尝试下面的一个将一维数组传递给额外的 Arraylist
ArrayList<String> al = new ArrayList<String>();
String arr[] = {"Zero", "One", "Two"};
//Convert string array to a collection
Collection l = Arrays.asList(arr);
al.addAll(l);
i.putStringArrayListExtra("ar", al);
回答by Maneesh
You have to define ArrayList of type String. you can't pass Generic ArrayList in putStringArrayListExtra. Below is the correct code.
您必须定义 String 类型的 ArrayList。您不能在 putStringArrayListExtra 中传递通用 ArrayList。下面是正确的代码。
-----
ArrayList<String> al = new ArrayList<String>();
------
-------
list_bundle.putStringArrayListExtra("lists",al);
------
Now access this ArrayList in other activity like this.
现在在像这样的其他活动中访问这个 ArrayList。
ArrayList<String> cl= new ArrayList<String>();
cl =getIntent().getExtras().getStringArrayList("lists");
回答by Maneesh
First Activity :
第一个活动：
ArrayList<String> al = new ArrayList<String>();
int ROWS = 2;
int COLS = 1;
String[][] a2 = new String[ROWS][COLS];
a2[0][0]="one";
a2[1][0]="two";
for(int i=0;i<ROWS;i++)
{
for(int j=0;j<COLS;j++)
{
al.add(a2[i][j]);
}
}
i.putStringArrayListExtra("ar", al);
i.putExtra("ROWS", ROWS);
i.putExtra("COLS", COLS);
Second Activity :
第二个活动：
ArrayList<String> test = new ArrayList<String>();
test=getIntent().getExtras().getStringArrayList("ar");
int ROWS=getIntent().getExtras().getInt("ROWS");
int COLS=getIntent().getExtras().getInt("COLS");
String[][] a2 = new String[ROWS][COLS];
int index=0;
for(int i=0;i<ROWS;i++)
{
for(int j=0;j<COLS;j++)
{
a2[i][j]=test.get(index++);
}
}
回答by user2227186
Try this It worked for me
试试这个它对我有用
1st Activity
第一次活动
ArrayList<String> ar=new ArrayList<String>();
ar.add("Apple");
ar.add("Banana");
Intent i=new Intent(this,Route.class);
i.putStringArrayListExtra("list", ar);
startActivity(i);
2nd Activity
第二个活动
ArrayList<String> ar1=getIntent().getExtras().getStringArrayList("list");
