我有一个SignUp Activity，其中我有一个字段类别，我在其中调用了一个Parent活动ListView和一个所选复选框的基础我称为子类ListView。两个ListView都是从数据库sqlite填充的。如何使用startActivityForResult？
RegisterActivity.class
spProfession.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent in =new Intent(RegisterActivity.this,Signup_category.class);
in.putExtra("typeOfUser", typeOfUser);
startActivityForResult(in, 2);
}
});
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
// check if the request code is same as what is passed here it is 2
if(resultCode == RESULT_OK && requestCode == 2)
{
if (data.hasExtra("parentkey")) {
Toast.makeText(getApplicationContext(), "hello", Toast.LENGTH_LONG).show();
/* Intent in=new Intent(RegisterActivity.this,Child_Category.class);
startActivityForResult(in, requestCode);
*/ }
/*String message="heloo";
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
*/ }
}
ParentCategory.class 从注册
点击类别时调用此活动public class Signup_category extends ActionBarActivity implements
OnItemClickListener, OnCheckedChangeListener {
ListView listView1;
Button btn;
ArrayList<String> list;
DatabaseHandler databaseHandler;
String typeOfUser;
Context context = null;
CategoryAdapter<ProfessionEntity> adapter;
CategoryAdapter<?> categoryAdapter;
ArrayList<Integer> arr = null;
ListView lv = null;
ArrayList<String> selectedStrings = new ArrayList<String>();
ArrayList<ProfessionEntity> listProfession = new ArrayList<ProfessionEntity>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_signup_category);
listView1 = (ListView) findViewById(R.id.listView1);
btn = (Button) findViewById(R.id.button1);
listView1.setOnItemClickListener(this);
listView1.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
InitDatabase();
Intent in = getIntent();
typeOfUser = in.getStringExtra("typeOfUser");
loadProfessionData(typeOfUser);
CheckButtonClick();
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
}
private void loadProfessionData(String pos) {
listProfession = databaseHandler.getParentCategory(typeOfUser);
ArrayList<String> list = new ArrayList<String>();
for (int i = 0; i < listProfession.size(); i++) {
Log.d("prfoession:", listProfession.get(i).getDecription());
list.add("" + listProfession.get(i).getDecription());
}
adapter = new CategoryAdapter<ProfessionEntity>(Signup_category.this,listProfession);
listView1.setAdapter(adapter);
}
}
@Override
public void finish() {
Intent data = new Intent();
data.putExtra("parentkey", arr);
setResult(RESULT_OK, data);
super.finish();
}
public void CheckButtonClick(){
StringBuffer responseText = new StringBuffer();
responseText.append("The following were selected...\n");
ArrayList<ProfessionEntity> listentity = adapter.getCheckedItems();
for(int i=0;i<listentity.size();i++)
{
ProfessionEntity profs = listentity.get(i);
Log.d("parentkey",String.valueOf(profs.getParent_key()));
Log.d("selection",String.valueOf(profs.isSelected()));
if(profs.isSelected())
{
responseText.append("\n" + profs.getDecription());
}
arr.add(profs.getParent_key());
}
}
}
ChildCategory.class
此类调用parentcategory并根据父级的选中复选框填充列表但是......如何将该复选框项目数组从父级传递给子级
public class Child_Category extends Activity implements OnClickListener {
Button btn;
DatabaseHandler databaseHandler;
CategoryChildAdapter childAdapter;
ArrayList<ProfessionChildEntity> listChildProfession=new ArrayList<ProfessionChildEntity>();
ListView lvChild;
Intent intent;
ArrayList<Integer> arr;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_signup_category);
btn = (Button) findViewById(R.id.button1);
btn.setOnClickListener(this);
lvChild=(ListView)findViewById(R.id.listView1);
InitDatabase();
Intent in = getIntent();
arr=in.getIntegerArrayListExtra("parentkey");
// loadChildProfessionData(arr);
}
private void loadChildProfessionData(ArrayList<Integer> pos) {
listChildProfession = databaseHandler.getPChildCategory(pos);
ArrayList<String> list = new ArrayList<String>();
for (int i = 0; i < listChildProfession.size(); i++) {
Log.d("prfoession:", listChildProfession.get(i).getDescription());
list.add("" + listChildProfession.get(i).getDescription());
}
childAdapter = new CategoryChildAdapter(this,listChildProfession);
lvChild.setAdapter(childAdapter);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
// check if the request code is same as what is passed here it is 2
if(requestCode==2)
{
String message=data.getStringExtra("MESSAGE");
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
/*Intent in = new Intent(Child_Category.this,RegisterActivity.class);
startActivityForResult(in, 2);*/printData(arr);
}
}
答案 0 :(得分：0)
如果您希望将活动C的结果传递给A：
从活动A开始活动B：
Intent showB = new Intent(ActivityA, ActivityB);
startActivityForResult(showB, RequestCode);
在活动B中调用C：
Intent showC = new Intent(ActivityC);
showC.setFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
startActivity(showC);
finish(); //Close Activity B
在C：
//set the result code and close the activity
Intent result = new Intent();
setResult(resultCode, result);//like RESULT_OK
finish();
在A：
public void onActivityResult(int requestCode, int resultCode, Intent data) {
...... handle RequestCode here
}
从B
启动活动C时，您可能已经注意到了意图标记FLAG_ACTIVITY_FORWARD_RESULTpublic static final int FLAG_ACTIVITY_FORWARD_RESULT从：API Level 1
如果设置并且此意图用于从＆gt;现有活动启动新活动，则现有活动的回复目标将被＆gt;转移到新活动。这样，新活动可以调用＆gt; setResult（int）并将该结果发送回＆gt;原始活动的回复目标。
这样A应该收回从C
发回的额外内容中发回的任何数据