我有这个 ListActivity 用于显示从我的 ListViewActivity 获取的项目。
public class ListTasksActivity extends ListActivity implements AdapterView.OnItemClickListener {
ArrayList<HashMap<String,String>> adapterItems;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent i = getIntent();
ListView lv = getListView();
lv.setOnItemClickListener(this);
ArrayList<HashMap<String, String>> taskItems = (ArrayList<HashMap<String, String>>) i.getSerializableExtra("taskItems");
String[] stringArr = i.getStringArrayExtra("adapterStringArray");
int[] intArr = i.getIntArrayExtra("adapterIntArray");
ListAdapter taskadapter = new SimpleAdapter(this, taskItems,
R.layout.list_item_tasks,
stringArr,
intArr);
setListAdapter(taskadapter);
adapterItems = taskItems;
//CustomAdapterTasks customAdapterTasks = new CustomAdapterTasks((ListViewActivity) ListViewActivity.getAppContext(),);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String[] adapterString = new String[] {"location","object_id","task_subject","task_action","object"};
int[] adapterInt = new int[] {R.id.singleTaskLocation,R.id.singleTaskInvNumber,R.id.singleTaskSubject,R.id.singleTaskAction,R.id.singleTaskObject};
//neue Oberflaeche starten
Intent in = new Intent(this,ListSingleTaskActivity.class);
in.putExtra("adapterStringArray",adapterString);
in.putExtra("adapterIntArray",adapterInt);
in.putExtra("taskItems",adapterItems);
startActivity(in);
}
}
如果我点击一个项目然后会发生这种情况:
public class ListSingleTaskActivity extends Activity {
private static final int CAMERA_PIC_REQUEST = 2500;
ListView mylistview;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.single_task_layout);
Intent i = getIntent();
ArrayList<HashMap<String, String>> taskItems = (ArrayList<HashMap<String, String>>) i.getSerializableExtra("taskItems");
String[] stringArr = i.getStringArrayExtra("adapterStringArray");
int[] intArr = i.getIntArrayExtra("adapterIntArray");
ListAdapter taskadapter = new SimpleAdapter(this, taskItems,
R.layout.single_task_layout,
stringArr,
intArr)
}
我的问题是我想将信息从点击的项目发送到新的 Activity 并显示它们。上述代码的结果是他向我展示了整个项目。不仅仅是点击的那个。 怎么了?
我希望你清楚我的问题是什么。如果缺少某些内容,请评论
编辑:
现在我得到这个错误:
Caused by: java.lang.ClassCastException: java.util.HashMap cannot be cast to java.util.ArrayList
at de.example.app.ListSingleTaskActivity.onCreate(ListSingleTaskActivity.java:30)
就是这一行:
ArrayList<HashMap<String, String>> taskItems = (ArrayList<HashMap<String, String>>) i.getSerializableExtra("taskItems");
最佳答案
在 ListTasksActivity 中发送选中的数据:
Intent in = new Intent(this,ListSingleTaskActivity.class);
in.putExtra("adapterStringArray",adapterString.get(position));
in.putExtra("adapterIntArray",adapterInt[position]);
in.putExtra("taskItems",adapterItems.get(position));
startActivity(in);
关于android - Intent 项目 onClick to Activity,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30371695/