Develop Reference

Access string_array from activity and send selected item to another activity in android

hello friends today my question is about string_array.On my activity i created two buttons.Now on (strings.xml) i created string array name with two items and i have inserted some text as shown below.On each button click i would like to access each item individually.for example on button1 click show me first item and on button 2 click give me the 2nd item on.Can you please give me the code for button click as i have little idea on how to access item.I have created a textview activity to display my item with every click.my code is working fine till now but i need help with extra code that i have to add.Please help me .
// Button activity page
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" />
</ScrollView>
<Button
android:layout_height="wrap_content"
android:layout_marginTop="90dp"
android:layout_marginEnd="60dp"
android:layout_marginRight="50dp"
android:id="#+id/btn1"
android:layout_width="wrap_content"
android:text="#string/OKILA"
android:textSize="18sp"
android:textStyle="bold" />
<Button
android:id="#+id/button1"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:layout_marginTop="160dp"
android:layout_marginRight="50dp"
android:text="1"
android:textSize="18sp"
android:textStyle="bold" />
</RelativeLayout>
//strings.xml
<string-array name="chapters">
<item>this is tes1</item>
<item>this is test2</item>
</string-array>
//main
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import org.w3c.dom.Text;
public class Lipok extends AppCompatActivity implements View.OnClickListener {
Toolbar mActionBarToolbar;
Button btnOne;
Button btnTwo;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_lipok);
mActionBarToolbar=(Toolbar)findViewById(R.id.CHAPTERS);
setSupportActionBar(mActionBarToolbar);
getSupportActionBar().setTitle("CHAPTERS");
String[] chapters=getResources().getStringArray(R.array.chapters);
btnOne = findViewById(R.id.btn1);
btnTwo = findViewById(R.id.button1);
btnOne.setOnClickListener(this);
btnTwo.setOnClickListener(this);
}
#Override
public void onClick(View v) {
String text="";
switch(v.getId()){
case R.id.btn1 : {
text = getResources().getStringArray(R.array.chapters)[0];
break;
}
case R.id.button1 : {
text = getResources().getStringArray(R.array.chapters)[1];
break;
}
}
Intent intent = new Intent(Lipok.this,lipokchapters.class);
intent.putExtra("DATA", text);
startActivity(intent);
}
}
//textview activity page
package com.Aolai.temeshilai;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class lipokchapters extends AppCompatActivity {
TextView textView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_lipokchapters);
textView=findViewById(R.id.textv);
String text= getIntent().getStringExtra("Data");
textView.setText(text);
}
}

Try this :
xml file
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" />
</ScrollView>
<Button
android:layout_height="wrap_content"
android:layout_marginTop="90dp"
android:layout_marginEnd="60dp"
android:layout_marginRight="50dp"
android:id="#+id/OKILA"
android:layout_width="wrap_content"
android:text="#string/OKILA"
android:textSize="18sp"
android:textStyle="bold" />
<Button
android:id="#+id/button1"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:layout_marginTop="160dp"
android:layout_marginRight="50dp"
android:text="1"
android:textSize="18sp"
android:textStyle="bold" />
</RelativeLayout>
strings.xml
<string-array name="chapters">
<item>this is tes1</item>
<item>this is test2</item>
</string-array>
Main Class
public class Lipok extends AppCompatActivity implements View.OnClickListener {
Toolbar mActionBarToolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_lipok);
mActionBarToolbar=(Toolbar)findViewById(R.id.CHAPTERS);
setSupportActionBar(mActionBarToolbar);
getSupportActionBar().setTitle("CHAPTERS");
}
#Override
public void onClick(View v) {
String text="";
switch(v.getId()){
case R.id.OKILA : {
text = getResources().getStringArray(R.array.testArray)[0];
break;
}
case R.id.button1 : {
text = getResources().getStringArray(R.array.testArray)[1];
break;
}
}
Toast.makeText(this, text, Toast.LENGTH_LONG).show();
Intent intent = new Intent(this, YOUR_ACTIVITY_NAME.class);
intent.putExtra("DATA", text);
startActivity(intent);
// Or else you can do whatever you want to do here with that text
}
}
Then in your other activity
String data = getIntent().getStringExtra("DATA");
YOUR_TEXTVIEW_NAME.setText(data);

This is basics of Android so before answering I suggest you to go
through basic tutorials before posting on Stackoberflow.
Now,
Here is how you can access the items from your string_array.
String[] chapters= getResources().getStringArray(R.array.chapters);
Now,here is pseudo code that might help you.
btn1.setOnClickListener(
your_text_view.setText(chapters[0])
)
//Here 0 means your first item, likewise you can access items by their index in
array

OnClick Button action in Custom ListView

Actually, I was trying to implement a shopping cart using Android Studio. There is a custom list view in the main page included an "Add to Cart" button. So, whenever I click on the button the item must be added in the cart. But, I have no idea. Please guys, help me out. I'm a newbie.
Here is the Product Adapter
package com.example.raswap.octomatic;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
/**
* Created by aurora on 22/03/16.
*/
public class Pro_Adapter extends ArrayAdapter {
List list = new ArrayList();
public Pro_Adapter(Context context, int resource) {
super(context, resource);
}
static class DataHandler{
ImageView img;
TextView p_name;
TextView b_name;
TextView price;
Button b_atc;
}
#Override
public void add(Object object) {
list.add(object);
}
#Override
public int getCount() {
return this.list.size();
}
#Override
public Object getItem(int position) {
return this.list.get(position);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row;
row = convertView;
DataHandler handler;
if(convertView == null){
LayoutInflater inflater = (LayoutInflater)this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.e_layout, parent, false);
handler = new DataHandler();
handler.img = (ImageView)row.findViewById(R.id.pro_image);
handler.p_name = (TextView)row.findViewById(R.id.pro_name);
handler.b_name = (TextView)row.findViewById(R.id.brand);
handler.price = (TextView)row.findViewById(R.id.pricing);
handler.b_atc = (Button)row.findViewById(R.id.atc);
row.setTag(handler);
}else{
handler = (DataHandler)row.getTag();
}
Product_data_provider dataProvider;
dataProvider = (Product_data_provider)this.getItem(position);
handler.img.setImageResource(dataProvider.getPro_img_resource());
handler.p_name.setText(dataProvider.getPro_name());
handler.b_name.setText(dataProvider.getBr_name());
handler.price.setText(dataProvider.getPricing());
return row;
}
}
Here is the Main Activity class:
package com.example.raswap.octomatic;
import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
public class E_shop extends Activity {
ListView listView;
int[] emage = {R.drawable.gb32, R.drawable.tb1, R.drawable.dvd};
String[] pro_name;
String[] br_name;
String[] price;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.activity_e_shop);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_titlebar);
View z = findViewById(R.id.oct_logo);
z.setClickable(true);
z.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(E_shop.this, MainActivity.class));
}
});
View x = findViewById(R.id.for_user_info);
x.setClickable(true);
x.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(E_shop.this, UserInformation.class));
}
});
Pro_Adapter adapter = new Pro_Adapter(getApplicationContext(),R.layout.e_layout);
ListView listView = (ListView)findViewById(R.id.e_list);
listView.setAdapter(adapter);
pro_name = getResources().getStringArray(R.array.nameOfProduct);
br_name = getResources().getStringArray(R.array.branding);
price = getResources().getStringArray(R.array.pricing);
int i = 0;
for(String pro: pro_name){
Product_data_provider dataProvider = new Product_data_provider(emage[i],pro, br_name[i], price[i]);
adapter.add(dataProvider);
i++;
}
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch(position){
case 0:
Intent newActivity = new Intent(E_shop.this, Product_Desc.class);
newActivity.putExtra("pro_emage",R.drawable.gb32);
newActivity.putExtra("title","Kingston 32Gigs Pen Drive");
newActivity.putExtra("desc", "Store a huge collection of data in a generous 32GB space of this Kingston pen drive and carry it along. It has a sleek design with a smooth finish, and a pretty-looking charm bearing the Kingston logo dangles from this pen drive. Featured in a size of 3 x 1.2 x 0.5 cm, this Kingston 32GB pen drive weighs only 5g. You can easily tuck it away in the pocket of your laptop bag, purse or your shirt pocket with its compact and light weight.");
startActivity(newActivity);
break;
case 1:
Intent Activity1 = new Intent(E_shop.this, Product_Desc.class);
Activity1.putExtra("pro_emage",R.drawable.tb1);
Activity1.putExtra("title","Samsung 1TB Portable Hard Disk");
Activity1.putExtra("desc", "From college to school students, all deal with transferring files, software and applications from various systems that are large in size. With the advancements in media technology on the rise, we require a large amount of space to store our data. Even most of the growing companies require a secure means of storing data for analyses. All of this embarks on the need for a reliable hard disk. The top quality brand of Samsung brings you this sleek and portable hard drive ideally designed for continuous usage. Now you can store 2TB of diverse data easily. This, sleek hard disk comes with 36 months warranty. The body of this drive has a smart construction. The Samsung external hard disk comes in a sturdy design.");
startActivity(Activity1);
break;
case 2:
Intent Activity2 = new Intent(E_shop.this, Product_Desc.class);
Activity2.putExtra("pro_emage", R.drawable.dvd);
Activity2.putExtra("title", "A pack of 50 DVD's");
Activity2.putExtra("desc", "Create and store digital video, audio and multimedia files, Stores up to 4.7GB or more than 2 hours of MPEG2 video, Has 7 times the storage capacity of a CDR, Sony branded 16X DVD-R in a 100 pack Spindle, AccuCORE Technology");
startActivity(Activity2);
break;
}
}
#SuppressWarnings("unused")
public void onClick(View v){
}
});
}
}
Here is the Product Data Provider Class:
package com.example.raswap.octomatic;
/**
* Created by aurora on 22/03/16.
*/
public class Product_data_provider {
private int pro_img_resource;
private String pro_name;
private String br_name;
private String pricing;
public int getPro_img_resource() {
return pro_img_resource;
}
public Product_data_provider(int pro_img_resource, String pro_name, String br_name, String pricing){
this.setPro_img_resource(pro_img_resource);
this.setPro_name(pro_name);
this.setBr_name(br_name);
this.setPricing(pricing);
}
public void setPro_img_resource(int pro_img_resource) {
this.pro_img_resource = pro_img_resource;
}
public String getPro_name() {
return pro_name;
}
public void setPro_name(String pro_name) {
this.pro_name = pro_name;
}
public String getBr_name() {
return br_name;
}
public void setBr_name(String br_name) {
this.br_name = br_name;
}
public String getPricing() {
return pricing;
}
public void setPricing(String pricing) {
this.pricing = pricing;
}
}
Now, Custom ListView XML file:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="blocksDescendants">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/oneL"
android:layout_width="match_parent"
android:layout_height="200dp"
android:orientation="horizontal">
<ImageView
android:id="#+id/pro_image"
android:src="#drawable/gb32"
android:layout_width="160dp"
android:layout_height="match_parent" />
<LinearLayout
android:background="#afeeee"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Product Name"
android:id="#+id/pro_name"
android:textColor="#000"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Branding"
android:id="#+id/brand"
android:textColor="#000"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
android:layout_marginBottom="10dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Price"
android:textColor="#000"
android:id="#+id/pricing"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add to Cart"
android:id="#+id/atc" />
</LinearLayout>
</LinearLayout>
<View
android:layout_below="#+id/oneL"
android:layout_width="match_parent"
android:layout_height="5dp"
android:background="#000"/>
</RelativeLayout>
</RelativeLayout>
and finally the main layout XML file:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.raswap.octomatic.E_shop">
<ListView
android:id="#+id/e_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>

Add your button's OnClick event in the Pro_Adapter's getView() methond as you do normally in your activities' onCreate() method.

Implement OnClickListener in your adapter class and get the Button click first and do the other task when you get the event. If you need the call back to your main activity class implement your own listener.follow the link enter link description here

Add the onClickListener to your Button in getView() of your ListAdapter.

If you want handle event click button in row, i'm think you should answer set button onclick event for every row of listview

you can try this.
Change in custom Listview xml file.
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add to Cart"
android:onClick="AddCart"
android:id="#+id/atc" />
In MainActivity
public void AddCart(View v)
{
LinearLayout vwParentRow = (LinearLayout)v.getParent();
TextView child = (TextView)vwParentRow.getChildAt(0);
child.setText("I've been clicked!");
vwParentRow.refreshDrawableState();
}

scrollview not responding

In one screen in my app, I have one ListFragment that is not responding to gestures. In other screens, my ListFragments behave appropriately - moving up and down based on touch. But this instance does not move in response to gestures. I have tried setting the height to a specific dip, enclosing the ListFragment in a ScrollView but nothing works. Logs prove there are 3 entries in the list but only the first one and half of the second are visible. I can select the first entry from the list.
The xml follows. It's the inner fragment identified by " android:name="com.chex.control.LabelList"" that is not scrolling.
Has anyone encountered this problem and solved it?
Thanks
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/new_interval_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="New Interval" />
<EditText
android:id="#+id/days_in_interval"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="days in interval"
android:inputType="number"
android:singleLine="true" />
<EditText
android:id="#+id/goodi_goal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="goodi goal"
android:inputType="number"
android:singleLine="true" />
<LinearLayout
android:id="#+id/label_selector"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<LinearLayout
android:id="#+id/default_label_pane"
android:layout_width="0px"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Default Labels" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:scrollbars="vertical" >
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/default_labels_fragment"
android:name="com.chex.control.LabelList"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#android:color/white"
android:focusable="true" >
</fragment>
</ScrollView>
</LinearLayout>
<LinearLayout
android:id="#+id/add_remove_label_selector"
android:layout_width="0px"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<Button
android:id="#+id/add_label_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Add" />
<Button
android:id="#+id/remove_label_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Remove" />
</LinearLayout>
<LinearLayout
android:id="#+id/label_pane"
android:layout_width="0px"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Inteval Labels" />
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/interval_labels_fragment"
android:name="com.chex.control.IntervalLabelList"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="true" >
</fragment>
<EditText
android:id="#+id/new_label"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="new label"
android:inputType="text"
android:singleLine="true" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/keep_discard_button_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="#+id/keep_interval_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Keep" />
<Button
android:id="#+id/discard_interval_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Discard" />
</LinearLayout>
</LinearLayout>
</ScrollView>
here is the fragment .java
package com.chex.control;
import java.util.ArrayList;
import com.chex.R;
import com.chex.storage.Child;
import com.chex.storage.DatabaseConstants;
import com.chex.storage.DatabaseHelper;
import com.chex.storage.DatabaseIO;
import com.chex.storage.Label;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.CursorAdapter;
import android.support.v4.widget.SimpleCursorAdapter;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
/**
* presents all the labels on the device.
*/
public class LabelList extends ListFragment implements DatabaseConstants,
GoodiList {
private final String TAG = "LabelList";
ArrayAdapter<Label> adapter = null;
private ListParent parentActivity;
private Label[] values;
private Label currentItem;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.e(TAG, "on Create");
ArrayList<Label> labelList = Label.getLabelsForInterval();
Log.i(TAG,labelList.size()+" labels");
// adapter = new IntervalListAdapter(getActivity(), values);
adapter = new IntervalListAdapter(getActivity(), labelList);
setListAdapter(adapter);
Log.e(TAG, "finished on Create");
}
/*
* (non-Javadoc)
*
* #see android.support.v4.app.Fragment#onActivityCreated(android.os.Bundle)
*/
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
LongClickListener longClickListener = new LongClickListener();
getListView().setOnItemLongClickListener(longClickListener);
}
/**
* create and return a CursorLoader that will take care of creating a Curso
* for the data being displayed.
*/
/**
* this used to delete. However, we need it to select usually. Now delete is
* done by long click.
*/
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
// delete child - remove child from list and database
Object item = l.getItemAtPosition(position);
currentItem = (Label) item;
Log.e(TAG,
"selected " + currentItem.getLabel() + " id: "
+ currentItem.getId() + " at position " + position);
parentActivity.listItemSelected(this, position, currentItem.getId());
}
/**
* Forces cursor to requery database and list to be update. Used when a new
* child is entered in parent activity's EditText field.
*/
public void notifyDataChanged() {
Log.e(TAG, "told adapter that data changed");
adapter.notifyDataSetChanged();
}
/*
* (non-Javadoc)
*
* #see android.support.v4.app.Fragment#onAttach(android.app.Activity)
*/
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
parentActivity = (ListParent) activity;
parentActivity.setList(this);
}
class LongClickListener implements OnItemLongClickListener {
public boolean onItemLongClick(AdapterView<?> adapterView, View view,
int position, long id) {
// delete child - remove child from list and database
// adapter view. Can always call parent's getItemAtPosition
final Object item = adapterView.getItemAtPosition(position);
final Label label = (Label) item;
final String name = label.getLabel();
Log.e(TAG, "selected " + name + " at position " + position
+ " now we'll delete them");
// make sure user wants to delete
AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
alert.setTitle("Delete " + name + "?");
alert.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
Label.deleteLabel(name);
adapter.remove(label);
// update the list
notifyDataChanged();
}
});
alert.setNegativeButton("No",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// nothing happens - child remains
}
});
alert.show();
return true;
}
}
#Override
public void addListItem(int itemId) {
Label labelToAdd = Label.lookupLabel(itemId);
if (labelToAdd == null) {
Log.e(TAG, "didn't find a label for label id " + itemId);
} else {
Log.e(TAG, "adding label: " + labelToAdd.getLabel() + " "
+ labelToAdd.getId() + " id argument: " + itemId);
// breaks because the adapter is currently strings
adapter.add(labelToAdd);
notifyDataChanged();
}
}
#Override
public void removeListItem(int itemId) {
// TODO Auto-generated method stub
}
#Override
public void removeListItem() {
// TODO Auto-generated method stub
}
#Override
public void highlightListIndex(int index) {
ListView listView = getListView();
listView.setItemChecked(index, true);
}
}

The android is not the best with scrolling views in scrolling views, like in your case.
You have to try to avoid this situation, try to modify the layout to avoid these conflicts.
A pain in the a** method would be to intercept the parent's touch event (add an gesture listener too) and pass the event to the listfragment when the user made the scroll on the listfragment (you have to know the coordinates of the fragment inside the screen, etc). It sounds a lot easier then as is and will cause a lot of issues after that, so i recommend to rewrite your layout instead.

Button OnClickListener not working

I am new to Android. I am trying to get input from the EditText and displaying it in TextView with the help of button. When I click the button nothing happens. Please help, here is my MainActivity.java code -
package com.example.addname;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
Button b1;
TextView v1;
EditText t1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b1 = (Button) findViewById(R.id.button1);
t1 = (EditText) findViewById(R.id.editText1);
v1 = (TextView) findViewById(R.id.textView1);
b1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(t1.getText().toString()=="")
{
v1.setText(t1.getText().toString());
}
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
and here is my activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="#string/hello_world" />
<EditText
android:id="#+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginTop="25dp"
android:ems="10" >
<requestFocus />
</EditText>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/textView1"
android:layout_below="#+id/editText1"
android:layout_marginTop="48dp"
android:text="Button" />
</RelativeLayout>

Instead of
if(t1.getText().toString()=="")
{
v1.setText(t1.getText().toString());
}
You can use
if(t1.getText().isEmpty()) // isEmpty() is only available from API 9 and Above
{
v1.setText(t1.getText().toString());
}
or this
if(t1.getText().trim().length == 0)
{
v1.setText(t1.getText().toString());
}
Don't compare strings using ==. You're actually comparing reference of an object. To compare strings, use equals() method.

I'd recommend comparing strings with .equals() since Objects compared with == usually fails (== compares references, not Object content).
if(t1.getText().toString().equals("")))
in your case though,since you're comparing an empty String, you can also use
if (t1.getText().toString().length == 0)
Then note that once you set the text, you're setting v1's text to an empty string since your logic indicates that only upon an empty string you set v1's text. So I'd recommend getting rid of the if altogether:
#Override
public void onClick(View arg0) {
v1.setText(t1.getText().toString());
}

EditText.getText() returns text from different view in onPause after rotating device

I have a strange problem here with an EditText view. In onPause() after an orientation change, the EditText view returns text via getText() that was never assigned to it.
In fact, the EditText object in question is only assigned an empty string.
In the error situation, it returns part(!) of a text that was assigned to a different TextView.
This does however not happen if onPause is triggered by pressing the "back" key.
Can anybody give me a clue? I do not understand what is happening here:
My activity:
package com.example.rotationtest;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
private final String LOG_TAG = "Test";
private EditText mEditText;
private TextView mTextView;
private EditOk mEditOk;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.title);
mEditText = (EditText) findViewById(R.id.editText);
mEditText.setText("");
mEditOk = new EditOk() {
#Override
public void ok(String result) {
mTextView.setText(result);
}
};
editTextDialog(R.string.dialog_title, (CharSequence)getString(R.string.dialog_title), mTextView.getText().toString(), mEditOk);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
abstract class EditOk {
abstract public void ok(String result);
}
void editTextDialog(int titleId, CharSequence message, String text,
final EditOk ok) {
LayoutInflater inflater = (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.edittext_dialog,
(ViewGroup) findViewById(R.id.layout_root));
TextView messageView = (TextView) layout.findViewById(R.id.text);
messageView.setText(message);
final EditText input = (EditText) layout.findViewById(R.id.editTextDialog);
Log.d(LOG_TAG, "input = " + input);
input.setTransformationMethod(android.text.method.SingleLineTransformationMethod.getInstance());
input.setText(text);
new AlertDialog.Builder(this)
.setTitle(titleId)
.setView(layout)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
String newName = input.getText().toString();
if (newName.length() != 0) {
ok.ok(newName);
}
}})
.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
setResult(RESULT_CANCELED);
finish();
}
})
.create().show();
}
#Override
protected void onPause() {
super.onPause();
Log.d(LOG_TAG, "onPause: editText is " + mEditText.getText());
}
}
and layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="false"
android:text="#string/hello_world"
tools:context=".MainActivity" />
<EditText
android:id="#+id/editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/title"
android:layout_centerHorizontal="true"
android:layout_marginTop="22dp"
android:ems="10"
android:inputType="textMultiLine" />
</RelativeLayout>
There is an AlertDialog involved which's layout is this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/layout_root" android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:paddingLeft="20dp" android:paddingRight="20dp" android:paddingBottom="20dp" android:paddingTop="15dp" android:layout_gravity="top">
<TextView android:id="#+id/text" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:textColor="#FFF"
android:gravity="top" android:textSize="16sp" android:paddingBottom="20dp"/>
<EditText
android:id="#+id/editTextDialog"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<requestFocus></requestFocus>
</EditText>
</LinearLayout>
Now the steps are these:
Start activity in portrait orientation. A dialog pops up containing an EditText, prefilled with "Hello World!"
Append "zzz" to "Hello world!"
Press OK. "Hello world!zzz" is now assigned to the TextView on the Activity.
Now rotate the device to landscape. In onPause, mEditText.getText() now returns "zzz" although mEditText was not touched at all.
Any ideas? My expectation is that mEditText.getText() always returns "". If you repeat these steps but trigger onPause() by pressing back instead of rotating the device, getText() indeed does return "" as expected. Why not when rotating the device?
Additional note: I noticed that the soft keyboard seems to be necessary for the issue to appear. On an emulator with "Keyboard support = yes", the issue doesn't show up.

I had the same kind of issue with EditText. Looking in forums, I found that setting android:inputType="textNoSuggestions" fixes the issue, I don't know exactly how it works but, it worked fine on the Motorola Et1 tablet(Android 2.3).