我在类中有一个名为A的列表视图，如果我按任何列表项，它将转到页面B，在页面B中我有一些其他元素，在活动B中我也有警报框，所以如果我选择从该警报框提交它将带我到页面C。所以我的问题是我使用Bundles从活动A到B的列表项位置但在活动C中如果我点击后退按钮然后再次如果我点击活动B中的警告框中的提交按钮它显示错误它不会活动C.我在谷歌搜索，我实施但它不工作....所以任何人都可以帮助我.... 活动是
公共类MainActivity扩展了ListActivity {
private static final int LIST_ITEM_TYPE_1 = 0;
private static final int LIST_ITEM_TYPE_2 = 1;
private static final int LIST_ITEM_TYPE_COUNT = 2;
private static final int LIST_ITEM_COUNT = 3;
private static final int LIST_ITEM_TYPE_1_COUNT = 1;
private static final int LIST_ITEM_TYPE_2_COUNT = 2;
private MyCustomAdapter mAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActionBar actionbar = getActionBar();
actionbar.setDisplayShowHomeEnabled(false);
//actionbar.setDisplayShowTitleEnabled(true);
// actionbar.setDisplayHomeAsUpEnabled(true);
mAdapter = new MyCustomAdapter();
for (int i = 0; i < LIST_ITEM_COUNT; i++) {
if (i < LIST_ITEM_TYPE_1_COUNT)
mAdapter.addItem("item type 1");
else if(i==LIST_ITEM_TYPE_2_COUNT)
mAdapter.addItem("Wbs for osting Booking");
else
mAdapter.addItem("Jake Johnson");
}
setListAdapter(mAdapter);
}
private class MyCustomAdapter extends BaseAdapter {
private ArrayList<String> mData = new ArrayList<String>();
private LayoutInflater mInflater;
public MyCustomAdapter() {
mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void addItem(final String item) {
mData.add(item);
notifyDataSetChanged();
}
@Override
public int getItemViewType(int position) {
if(position < LIST_ITEM_TYPE_1_COUNT)
return LIST_ITEM_TYPE_1;
else
return LIST_ITEM_TYPE_2;
}
@Override
public int getViewTypeCount() {
return LIST_ITEM_TYPE_COUNT;
}
@Override
public int getCount() {
return mData.size();
}
@Override
public String getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
int type = getItemViewType(position);
if (convertView == null) {
holder = new ViewHolder();
switch(type) {
case LIST_ITEM_TYPE_1:
convertView = mInflater.inflate(R.layout.emp_sign_off_first_row, null);
break;
case LIST_ITEM_TYPE_2:
convertView = mInflater.inflate(R.layout.emp_sign_off_sec_row, null);
holder.textView = (TextView)convertView.findViewById(R.id.emp_nametxt);
holder.textVersion = (TextView)convertView.findViewById(R.id.emp_idtxt);
holder.img = (ImageView)convertView.findViewById(R.id.imageView2);
holder.textView.setText(mData.get(position));
holder.textVersion.setText("1.100235");
holder.img.setVisibility(View.INVISIBLE);
break;
}
convertView.setTag(holder);
} else {
holder = (ViewHolder)convertView.getTag();
}
convertView.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Intent i=new Intent(MainActivity.this,MenuActivity.class);
i.putExtra("pos",""+ position);
startActivity(i);
}
});
return convertView;
}
}
public static class ViewHolder {
public TextView textView;
public TextView textVersion;
public ImageView img;
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
return true;
}
}
我的活动B是
公共类MenuActivity扩展ListActivity实现了View.OnClickListener {
private static final int LIST_ITEM_TYPE_1 = 0;
private static final int LIST_ITEM_TYPE_2 = 1;
private static final int LIST_ITEM_TYPE_3 = 2;
private static final int LIST_ITEM_TYPE_4 = 3;
private static final int LIST_ITEM_TYPE_COUNT = 4;
private static final int LIST_ITEM_COUNT = 4;
private static final int LIST_ITEM_TYPE_1_COUNT = 1;
private static final int LIST_ITEM_TYPE_2_COUNT = 2;
private static final int LIST_ITEM_TYPE_3_COUNT = 3;
private MyCustomAdapter mAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActionBar actionbar = getActionBar();
actionbar.setDisplayShowHomeEnabled(false);
actionbar.setDisplayShowTitleEnabled(false);
actionbar.setDisplayHomeAsUpEnabled(true);
mAdapter = new MyCustomAdapter();
for (int i = 0; i < LIST_ITEM_COUNT; i++) {
if (i < LIST_ITEM_TYPE_1_COUNT)
mAdapter.addItem("Jake JohnSon");
else if(i<LIST_ITEM_TYPE_2_COUNT)
mAdapter.addItem("ITEM TYPE 2");
else if(i<LIST_ITEM_TYPE_3_COUNT)
mAdapter.addItem("ITEM TYPE 3");
else
mAdapter.addItem("ITEM TYPE 4");
}
setListAdapter(mAdapter);
}
private class MyCustomAdapter extends BaseAdapter {
private ArrayList<String> mData = new ArrayList<String>();
private LayoutInflater mInflater;
public MyCustomAdapter() {
mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void addItem(final String item) {
mData.add(item);
notifyDataSetChanged();
}
@Override
public int getItemViewType(int position) {
if(position < LIST_ITEM_TYPE_1_COUNT)
return LIST_ITEM_TYPE_1;
else if(position < LIST_ITEM_TYPE_2_COUNT)
return LIST_ITEM_TYPE_2;
else if(position < LIST_ITEM_TYPE_3_COUNT)
return LIST_ITEM_TYPE_3;
else
return LIST_ITEM_TYPE_4;
}
@Override
public int getViewTypeCount() {
return LIST_ITEM_TYPE_COUNT;
}
@Override
public int getCount() {
return mData.size();
}
@Override
public String getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
int type = getItemViewType(position);
if (convertView == null) {
holder = new ViewHolder();
switch(type) {
case LIST_ITEM_TYPE_1:
convertView = mInflater.inflate(R.layout.emp_sign_off_sec_row, null);
holder.textView=(TextView)convertView.findViewById(R.id.emp_nametxt);
holder.textVersion = (TextView)convertView.findViewById(R.id.emp_idtxt);
holder.img = (ImageView)convertView.findViewById(R.id.imageView2);
holder.img.setVisibility(View.INVISIBLE);
holder.textView.setText(mData.get(position));
holder.textVersion.setText("1.100235");
break;
case LIST_ITEM_TYPE_2:
convertView = mInflater.inflate(R.layout.emp_sign_off_after_page_row2, null);
holder.textView=(TextView)convertView.findViewById(R.id.textView1);
holder.textView.setText("Absent");
holder.text=(Switch)convertView.findViewById(R.id.switch1);
break;
case LIST_ITEM_TYPE_3:
convertView = mInflater.inflate(R.layout.emp_sign_off_details_row3, null);
break;
case LIST_ITEM_TYPE_4:
convertView = mInflater.inflate(R.layout.emp_sign_off_details_row4, null);
break;
}
convertView.setTag(holder);
} else {
holder = (ViewHolder)convertView.getTag();
}
return convertView;
}
}
public static class ViewHolder {
public TextView textView;
public TextView textVersion;
public Switch text;
public ImageView img;
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu1, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if(resultCode==1)
{
if (resultCode == RESULT_OK) {
//String name = data.getStringExtra("Result");
Bundle b=getIntent().getExtras();
String s=b.getString("pos");
Intent i=new Intent(MenuActivity.this,EmpSignOffAfterPageActivity.class);
i.putExtra("pos", s);
}
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
break;
case R.id.action_settings1:
AlertDialog.Builder alertDialog = new AlertDialog.Builder(
MenuActivity.this);
LayoutInflater inflater = MenuActivity.this.getLayoutInflater();
alertDialog.setView(inflater.inflate(R.layout.pop_up_window, null));
alertDialog.setPositiveButton("Submit",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
Bundle b=getIntent().getExtras();
String s=b.getString("pos");
Toast.makeText(getApplicationContext(), "item"+s, Toast.LENGTH_SHORT).show();
Intent i=new Intent(MenuActivity.this,EmpSignOffAfterPageActivity.class);
i.putExtra("pos", s);
startActivityForResult(i, 1);
}
});
alertDialog.setNeutralButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
dialog.cancel();
}
});
alertDialog.show();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
我的活动C是
公共类EmpSignOffAfterPageActivity扩展了ListActivity {
private static final int LIST_ITEM_TYPE_1 = 0;
private static final int LIST_ITEM_TYPE_2 = 1;
private static final int LIST_ITEM_TYPE_3 = 2;
private static final int LIST_ITEM_TYPE_4 = 3;
private static final int LIST_ITEM_TYPE_COUNT = 4;
private static final int LIST_ITEM_COUNT = 4;
private static final int LIST_ITEM_TYPE_1_COUNT = 1;
private static final int LIST_ITEM_TYPE_2_COUNT = 2;
private static final int LIST_ITEM_TYPE_3_COUNT = 3;
private MyCustomAdapter mAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActionBar actionbar = getActionBar();
actionbar.setDisplayShowHomeEnabled(false);
actionbar.setDisplayShowTitleEnabled(false);
actionbar.setDisplayHomeAsUpEnabled(true);
mAdapter = new MyCustomAdapter();
for (int i = 0; i < LIST_ITEM_COUNT; i++) {
if (i < LIST_ITEM_TYPE_1_COUNT)
mAdapter.addItem("item type 1");
else if(i<LIST_ITEM_TYPE_2_COUNT)
mAdapter.addItem("ITEM TYPE 2");
else if(i<LIST_ITEM_TYPE_3_COUNT)
mAdapter.addItem("ITEM TYPE 3");
else
mAdapter.addItem("ITEM TYPE 4");
}
setListAdapter(mAdapter);
}
private class MyCustomAdapter extends BaseAdapter {
private ArrayList<String> mData = new ArrayList<String>();
private LayoutInflater mInflater;
public MyCustomAdapter() {
mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void addItem(final String item) {
mData.add(item);
notifyDataSetChanged();
}
@Override
public int getItemViewType(int position) {
if(position < LIST_ITEM_TYPE_1_COUNT)
return LIST_ITEM_TYPE_1;
else if(position < LIST_ITEM_TYPE_2_COUNT)
return LIST_ITEM_TYPE_2;
else if(position < LIST_ITEM_TYPE_3_COUNT)
return LIST_ITEM_TYPE_3;
else
return LIST_ITEM_TYPE_4;
}
@Override
public int getViewTypeCount() {
return LIST_ITEM_TYPE_COUNT;
}
@Override
public int getCount() {
return mData.size();
}
@Override
public String getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
int type = getItemViewType(position);
if (convertView == null) {
holder = new ViewHolder();
switch(type) {
case LIST_ITEM_TYPE_1:
convertView = mInflater.inflate(R.layout.emp_sign_off_sec_row, null);
holder.img = (ImageView)convertView.findViewById(R.id.imageView2);
holder.img.setVisibility(View.INVISIBLE);
break;
case LIST_ITEM_TYPE_2:
convertView = mInflater.inflate(R.layout.emp_sign_off_agter_page_row1, null);
break;
case LIST_ITEM_TYPE_3:
convertView = mInflater.inflate(R.layout.emp_sign_off_after_page_row2, null);
break;
case LIST_ITEM_TYPE_4:
convertView = mInflater.inflate(R.layout.emp_sign_off_after_page_row2, null);
holder.textView=(TextView)convertView.findViewById(R.id.textView1);
holder.textView.setText(" Do you understand the hazards you may have been exposed to throughout your work day(falls,crush points,chemicaals,etc)?");
holder.text=(Switch)convertView.findViewById(R.id.switch1);
break;
}
convertView.setTag(holder);
} else {
holder = (ViewHolder)convertView.getTag();
}
return convertView;
}
}
public static class ViewHolder {
public TextView textView;
public TextView textVersion;
public Switch text;
public ImageView img;
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.emp_sign_off_after_page, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case android.R.id.home:
Bundle b=getIntent().getExtras();
String s=b.getString("pos");
Toast.makeText(getApplicationContext(), "item"+s, Toast.LENGTH_SHORT).show();
Intent i=new Intent();
i.putExtra("pos", s);
setResult(RESULT_OK,i);
finish();
break;
case R.id.action_settings1:
AlertDialog.Builder alertDialog = new AlertDialog.Builder(
EmpSignOffAfterPageActivity.this);
LayoutInflater inflater = EmpSignOffAfterPageActivity.this.getLayoutInflater();
alertDialog.setView(inflater.inflate(R.layout.emp_sign_off_last_dialog, null));
final EditText pass=(EditText)findViewById(R.id.editText1);
alertDialog.setPositiveButton("Approve",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
Bundle b=getIntent().getExtras();
String s=b.getString("pos");
Toast.makeText(getApplicationContext(), "item"+s, Toast.LENGTH_SHORT).show();
Intent i=new Intent(EmpSignOffAfterPageActivity.this,EmpSignOffLastPageActivity.class);
i.putExtra("pos", s);
startActivity(i);
}
});
alertDialog.setNeutralButton("Reject",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
Bundle b=getIntent().getExtras();
String s=b.getString("pos");
Toast.makeText(getApplicationContext(), "item"+s, Toast.LENGTH_SHORT).show();
Intent i=new Intent(EmpSignOffAfterPageActivity.this,EmpSignOffRejectActivity.class);
i.putExtra("pos", s);
setResult(RESULT_OK,i);
finish();
}
});
alertDialog.show();
return true;
}
return super.onOptionsItemSelected(item);
}
}
所以请告诉我如何将列表项目位置从活动C回到B，然后如果我点击B中的提醒框提交，它应该转到活动C，列表项位置.....
答案 0 :(得分：0)
在你的B活动中，它是MenuActivity：在onActivityResult
中替换它：
Bundle b=getIntent().getExtras();
with：
Bundle b=data.getExtras();
// onActivityResults已经返回活动的结果。如果你通过getIntent（）检查，那么就没有该活动的引用。
此外，当您从对话框中单击时，在Intent中添加null检查，因为您现在从C活动返回并且没有引用该意图。如果来自C活动，你可以设置一个bool，然后获取onActivityResult intent的数据。