I'm trying to create an activity where I have a GridLayout that is populated dynamically:
Here's the xml layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:gravity="center"
android:orientation="vertical"
tools:context="GoalsActivity" >
<ScrollView
android:id="#+id/scroll_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<GridLayout
android:id="#+id/goals_grid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:columnCount="2"
android:orientation="horizontal"
android:layout_gravity="center" >
</GridLayout>
</ScrollView>
</LinearLayout>
And here's the activity:
public class GoalsActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_goals);
try {
JSONArray goals = new JSONArray(getIntent().getStringExtra("GOAL_LIST"));
GridLayout goalsGrid = (GridLayout) findViewById(R.id.goals_grid);
for(int i = 0; i <= goals.length(); i++) {
JSONObject goal = goals.getJSONObject(i);
TextView goalView = new TextView(GoalsActivity.this);
goalView.setHeight(125);
goalView.setWidth(125);
goalView.setText(goal.getString("name"));
goalsGrid.addView(goalView);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
As you can see I'm trying to display the goals using a GridLayout but whenever I run this code, the following happens:
Apparently all TextViews are stacking on top of each other, but if I add 2 of these:
<TextView
android:height="125dp"
android:width="125dp" />
under the GridLayout in my xml layout manually, they show up just like I need them to:
I can't figure out how to fix this, any help is greatly appreciated!
Related
I am trying to switch between two WebViews in my layout with Android Java. The two WebViews load different urls when the oncreate method is called. The only problem am having is that the first webview shows up with the site content when oncreate is called but when I click the button that is supposed to show the next webview, it removes the current webview from view and then shows white screen. Help me resolve that, below is my layout file and the android java code behind file
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ViewSwitcher
android:layout_height="wrap_content"
android:id="#+id/viewSwitcher1"
android:layout_width="wrap_content">
<LinearLayout
android:id="#+id/view1"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.webkit.WebView
android:id="#+id/webView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
<LinearLayout
android:id="#+id/view2"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.webkit.WebView
android:id="#+id/webView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
</ViewSwitcher>
<Button
android:id="#+id/button1"
android:text="Show Next"
android:layout_gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
</ScrollView>
and Android Java code for the behavior
public class MainActivity : AppCompatActivity
{
ViewSwitcher viewSwitcher;
private Button next;
protected WebView mywebview,webview2;
protected int mycount=0;
protected View view1, view2;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.activity_main);
viewSwitcher = FindViewById<ViewSwitcher>(Resource.Id.viewSwitcher1);
next = FindViewById<Button>(Resource.Id.button1);
mywebview = FindViewById<WebView>(Resource.Id.webView1);
webview2 = FindViewById<WebView>(Resource.Id.webView2);
view1 = FindViewById<View>(Resource.Id.view1);
view2 = FindViewById<View>(Resource.Id.view2);
WebViewClient client = mywebview.WebViewClient;
mywebview.LoadUrl("https://www.upwork.com");
webview2.LoadUrl("https:www.sololearn.com");
//set the in and out animation for the viewswitcher
viewSwitcher.SetOutAnimation(this, Resource.Animation.abc_slide_out_top);
viewSwitcher.SetInAnimation(this, Resource.Animation.design_bottom_sheet_slide_in);
next.Click += Next_Click;
//hide the action bar
}
private void Next_Click(object sender, System.EventArgs e)
{
if (viewSwitcher.CurrentView != view1)
{
viewSwitcher.ShowPrevious();
}else if(viewSwitcher.CurrentView != view2)
{
viewSwitcher.ShowNext();
}
}
}
I need to show n number of Edit text added dynamically below a static Edit text.
I am adding the ET but some how it is not visible. What am doing wrong??
Here is my code:
private void addEditTextView(int numberOfViews){
// Using layout params same as above static ET
ViewGroup.LayoutParams layoutParams = staticEditText.getLayoutParams();
for (int index = 0; index <= numberOfViews; index++) {
final EditText newET = new EditText(getActivity());
//Added below 2 lines just to make sure width and height are coming
layoutParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
layoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT;
newET.setLayoutParams(layoutParams);
newET.setHint("Select ME");
newET.setFocusable(false);
newET.setId(index);
newET.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//TODO set time
Log.d("Clicked...",newET.getId()+"");
}
});
//parentLayout is Linear Layout with Vertical orientation
parentLayout.addView(newET);
}
}
XML code :
<LinearLayout
android:id="#+id/parentLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:id="#+id/staticEditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="3dp"
android:background="#drawable/rectangle_bg_dark_gray_border"
android:focusable="false"
android:hint="staticEditText"
android:padding="7dp" />
</LinearLayout>
UPDATE : parentLayout.getChildCount() is coming correctly. New views are getting added but not visible!
Hi try adding a Scrollview
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/parentLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<!-- EDITTEXT here -->
</LinearLayout>
</ScrollView>
</LinearLayout>
I'm doing the Google Android App Course, and I encountered a weird error. If I call initVariables(), the layout is not appearing, if I comment it out, it appears. If I return after calling getResources(), I see the layout, if I return after calling getString(), no layout.
in the logcat i only see is some idle timeout reached.
i currently having some problems with my environment (eclipse crash and such), so i can't post a full logcat.
This is the code and the xml:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.advanced);
initLayout();
initVariables();
}
protected void initLayout() {
m_vwJokeButton = (Button) findViewById(R.id.addJokeButton);
m_vwJokeEditText = (EditText) findViewById(R.id.newJokeEditText);
m_vwJokeLayout = (LinearLayout) findViewById(R.id.jokeListLayout);
}
protected void initVariables() {
Resources resources = getResources();
author = resources.getString(R.string.author_name);
m_nDarkColor = resources.getColor(R.color.dark);
m_nLightColor = resources.getColor(R.color.light);
m_arrJokeList = new ArrayList<Joke>();
}
layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/InputLayoutViewGroup"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="#+id/addJokeButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add Joke" />
<EditText
android:id="#+id/newJokeEditText"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</EditText>
</LinearLayout>
<ScrollView
android:id="#+id/jokeListViewGroup"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/jokeListLayout"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</LinearLayout>
</ScrollView>
</LinearLayout>
If R.string.author_name isn't found at runtime, I'll be throwing an exception. You could catch the exception
try {
author = resources.getString(R.string.author_name);
} catch (Resources.NotFoundException e) {
}
but the question should really be why is your R.string.author_name missing? Are you able to successfully get any string resources?
I am wanting to create a set of checkboxes dynamically during run time in my android application. When the application runs nothing shows up except the button. What am i forgetting? Thanks in advance!
public class DataNotificationSurvey extends Activity {
private Date timeStamp;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.datanotifylayout);
final Button notifySubmitButton = (Button) findViewById(R.id.notifySubmitButton);
TableLayout t1 = (TableLayout)findViewById(R.id.notificationTableLayout);
for(int i = 0; i < 5; i++) {
TableRow tr = new TableRow(this);
CheckBox chk = new CheckBox(this);
chk.setText(Integer.toString(i));
tr.addView(chk);
t1.addView(tr);
}
notifySubmitButton.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});
}
//My xml layout, will be changing this later to the one posted below to see if it works.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="#+id/notificationLinearLayout"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TableLayout
android:id="#+id/notificationTableLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TableRow
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button android:text="Static Button"/>
</TableRow>
</TableLayout>
<Button
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="#+id/notifySubmitButton"
android:text="Submit"></Button>
</LinearLayout>
This works fine for me.
public class DynamicTableRowWithCheckBox extends Activity
{
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Button notifySubmitButton = (Button) findViewById(R.id.myButton);
TableLayout table = (TableLayout) findViewById(R.id.myTable);
for (int i = 0; i < 3; i++)
{
TableRow row = new TableRow(this);
CheckBox chk = new CheckBox(this);
chk.setText(Integer.toString(i));
row.addView(chk);
table.addView(row);
}
notifySubmitButton.setOnClickListener(
new View.OnClickListener()
{
#Override
public void onClick(View v)
{
finish();
}
});
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello" />
<Button
android:id="#+id/myButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Close" />
<TableLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:id="#+id/myTable" />
</LinearLayout>
Change your XML to:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="#+id/notificationLinearLayout"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TableLayout
android:id="#+id/notificationTableLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TableRow>
<Button
android:text="Static Button" />
</TableRow>
</TableLayout>
<Button
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="#+id/notifySubmitButton"
android:text="Submit"></Button>
</LinearLayout>
This removes the layout_height of your TableLayout to wrap_content, and it removes the height and width settings of your TableRow, because, "The children of a TableRow do not need to specify the layout_width and layout_height attributes in the XML file. TableRow always enforces those values to be respectively MATCH_PARENT and WRAP_CONTENT."
I have a ListView that uses SimpleAdapter, each row has 2 TextViews, and I would like to use an external font to one of the two TextView.. Here is the code of the class:
public class QuranEnglish extends Activity {
<...>
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.quran_english);
listview=(ListView) findViewById(R.id.QuranEnglishListView);
<..add into list..>
SimpleAdapter adapter = new SimpleAdapter(
this,
list,
R.layout.quran_english_row,
new String[] {"Arabic","English"},
new int[] {R.id.QuranEnglishTextViewArabic,R.id.QuranEnglishTextViewEnglish});
listview.setAdapter(adapter);
xml for each row (quran_english_row.xml):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" android:orientation="vertical">
<LinearLayout android:gravity="right" android:layout_height="wrap_content" android:id="#+id/linearLayout1" android:layout_width="fill_parent">
<TextView android:textSize="21px" android:text="TextView" android:id="#+id/QuranEnglishTextViewArabic" android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>
</LinearLayout>
<TextView android:textSize="21px" android:text="TextView" android:id="#+id/QuranEnglishTextViewEnglish" android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>
</LinearLayout>
xml for the layout (quran_english.xml):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" android:orientation="vertical">
<ListView android:id="#+id/QuranEnglishListView" android:layout_width="fill_parent" android:layout_height="fill_parent"></ListView>
</LinearLayout>
So how can I put the external typeface of the TextView that is in the row (quran_english_row.xml)? I tried using this line though it crashed my application:
((TextView) findViewById(R.id.QuranEnglishTextViewArabic)).setTypeface(Typeface.createFromAsset(getAssets(),"dejavusans.ttf"));
R.id.QuranEnglishTextViewArabic
is not an id of one of your views here. It is an id of a example view, which is used to fill the list. In order to change the font, you need to get one view of your list. This works if you have chosen one of your views:
TextView view = getSelectedView();
if (view != null) {
view.setTypeface(Typeface.createFromAsset(getAssets(),"dejavusans.ttf"));
}