How to create a shelf like view in android that show several book in any row? Also, it should have horizontal and vertical features like the moon+reader app has.
I can write a shelf view that moves horizontally but it doesn't fully work. I used a xml file for view items that included image, text and button. I wrote a class that extends AdapterView to create a customized ListView that I called "shelf view". Unfortunately, my program show one row and I can't use it for several row.
Last Updated: Now, I can detect a new way for create shelf-view better than the previous solution. I described it in CodeProject
By the Way, In this application I used two classes:
HorizontalListView Class that extends the AdapterView. It downloaded from GitHub
Quaere library use almost same as Linq2Object in .Net. You can download here.
Apr 22 '12:
There are some ways to implement shelf view that it have two features(horizontal & vertical scroll). I try to write a program that can run dynamically. This sample App have a XML file and a showShelfView java class.
So you can see my App:
main XML file: First, Add following code in main.XML
<?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="wrap_content"
android:id="#+id/sclView">
<TableLayout
android:id="#+id/tblLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="0dp">
</TableLayout>
</ScrollView>
showShelfView Class: Inner TableLayout add several HorizontalScroll equals with number of rows. Also inner any TableRow add Image.
Don't forget set a shelf image for Row's background:
public class showShelfView extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
int numRow = 4;
int numCol = 8;
TableLayout tblLayout = (TableLayout) findViewById(R.id.tblLayout);
for(int i = 0; i < numRow; i++) {
HorizontalScrollView HSV = new HorizontalScrollView(this);
HSV.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
TableRow tblRow = new TableRow(this);
tblRow.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
tblRow.setBackgroundResource(R.drawable.bookshelf);
for(int j = 0; j < numCol; j++) {
ImageView imageView = new ImageView(this);
imageView.setImageResource(R.drawable.book1);
TextView textView = new TextView(this);
textView.setText("Java Tester");
textView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
tblRow.addView(imageView,j);
}
HSV.addView(tblRow);
tblLayout.addView(HSV, i);
}
}
}
Related
I am trying to add buttons to a GridView for each string from textArray.
void addButtons() {
GridView gridView = (GridView) findViewById(R.id.gridView);
List<Button> buttons = new ArrayList<Button>();
for (int i = 0; i < textArray.length; i++) {
Button newButton = new Button(this);
newButton.setText(textArray[i]);
newButton.setId(i);
newButton.setOnClickListener(onClickListener);
buttons.add(newButton);
}
ArrayAdapter<Button> arrayAdapter = new ArrayAdapter<Button>
(this, android.R.layout.simple_list_item_1, buttons);
gridView.setAdapter(arrayAdapter);
}
But in result, I get this: Virtual Device screen
What can be wrong? Or maybe there is a better way to do the same thing? I've tried LinearLayout and everything was ok, but I was not able to scroll down.
how to add button in gridview dynamically might have a solution, but, to be honest, it is too hard for me at the moment.
Try this out, it shows how to create buttons during runtime https://forums.xamarin.com/discussion/49225/dynamic-buttons-in-gridview
So the initial problem was to get a view with programmatically generated buttons. The first solution was a LinearLayout, but I found out that I was not able to scroll it down, so the number of buttons was limited. On the internet, I found that GridView also can do such a task and it would be scrollable. Well, it is true, but I have stuck upon the problem mentioned in this thread.
After a few days of googling I found that LinearLayout inside ScrollView is what I need. So here is both my xml and java code for someone who stumbles up on the same problem:
<ScrollView
<LinearLayout
android:id="#+id/cityLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<!-- Content here -->
</LinearLayout>
</ScrollView>
void addButtons() {
LinearLayout linearLayout = findViewById(R.id.cityLayout);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams
(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
for (int i = 0; i < cityArray.length; i++) {
Button newButton = new Button(this);
newButton.setText(cityArray[i]);
newButton.setId(i);
newButton.setOnClickListener(onClickListener);
linearLayout.addView(newButton, layoutParams);
}
}
Anyway, thanks to everyone for help!
In my Project , I have 80 TextViews.
I should set their text from 1 to 80 once project runs , and they dont need to be changed in future.
Except TxtViews , I have some other things in my Layout, the TextViews are under ImagesViews. actually I have 80 imagesViews and under them are 80 TextViews. I want to set text of textViews from 1 to 80 dynamically.
I know I can do it in my layout.xml ,
but its really time consuming.
is there any way to do that by code?
for example with a for cycle or something like that?
Create a ViewGroup suitable for your needs in the layout, for example:
<LinearLayout
android:id="#+id/linear_layout"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
Then you create you TextView instances programatically, and add them to the LinearLayout, like this:
LinearLayout layout = (LinearLayout)findViewById(R.id.linear_layout);
for(int i = 0; i < 80; i++) {
TextView textView = new TextView(getContext());
textView.setText("text" + i);
layout.addView(textView);
}
Optionally, you can add tags or whatever to locate them again. Alternatively just iterate over the layouts subviews.
If you know that 80 Textview fixed then you should take listview for that.
Listview Benefit
Memory management automatically
Listview manage indexing
If they share the same layout, except for the text, and could be displayed as a list, you could use an ArrayAdapter and pass the values from code.
http://www.mkyong.com/android/android-listview-example/
Checkout the below example,
public class MainActivity extends Activity {
LinearLayout linearLayout ;
ScrollView scrollView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
scrollView = (HorizontalScrollView) findViewById(R.id.scrollViewActivityMain);
}
private void populateTextViews() {
linearLayout = new LinearLayout(this);
linearLayout.setOrientation(LinearLayout.HORIZONTAL);
//add all textViews here
for(int i=0; i < 80; i++){
TextView myTextView = new TextView(this);
myTextView.setText("My TextView "+i);
myTextView.setGravity(Gravity.CENTER);
linearLayout.addView(myTextView);
}
scrollView.addView(linearLayout);
}
}
Don't forget to put that scrollView in your xml.
Let me know if it works for you...
If your TextViews are declared on the xml, wrap them on another view so you can reference it on the java code later, then simply use a for.
Something like:
View view = findViewById(R.id.your_wrapper);
for(int i=0; i<((ViewGroup)view).getChildCount(); i++) {
View nChild = ((ViewGroup)view).getChildAt(i);
TextView tv = (TextView) nChild;
tv.setText(String.valueOf(i + 1));
}
If not, you can simply create them dynamically inside your java code, and append them to a layout like LinearLayout.
Example:
xml
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/linear"
/>
Java code
LinearLayout ll = (LinearLayout) findViewById(R.id.linear);
for (int i = 1; i <= 80; i++) {
TextView tv = new TextView(this); // Assuming you're inside an Activity.
int count = ll.getChildCount();
tv.setText(String.valueOf(i));
ll.addView(tv, count, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
}
EDIT: But truly, you should use RecyclerView or ListView for that if your values are not going to change.
You can read more about RecyclerView here, and on ListView here.
Second edit: From what you're saying on your comments, you REALLY should be using ListView instead of your current design. The solutions above and from the other answers won't work at all for your problem.
I want to nest a TableLayout inside a RelativeLayout and later dynamically edit the TableLayout in my Java Code.
My XML-File looks like this:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_load_date"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".LoadDateActivity" >
<!-- few buttons and textviews -->
<TableLayout
android:id="#+id/activity_load_date_table_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/button" >
</TableLayout>
</RelativeLayout>
Java Code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_load_date);
//Do something with my Buttons and TextViews(this works fine)
tblLayout = (TableLayout) findViewById(R.id.activity_load_date_table_layout);
}
#Override
public void onClick(View v) {
if (v.getId() == R.id.button_calc) {
for (int i = 0; i < listOfEntries.size(); i++) {
Entry temp = listOfEntries.get(i);
if (temp.getDate().getTime() >= startDate.getTime()
&& temp.getDate().getTime() <= endDate.getTime()) {
TableRow tr = new TableRow(this);
TextView comm = new TextView(this);
comm.setText(listOfEntries.get(i).getComment());
TextView val = new TextView(this);
val.setText(String.valueOf(listOfEntries.get(i).getValue()));
LayoutParams params = new LayoutParams(0,
LayoutParams.WRAP_CONTENT, 1f);
tr.setLayoutParams(params);
tr.addView(comm);
tr.addView(val);
tblLayout.addView(tr);
}
}
tblLayout.invalidate(); //Shouldn't this redraw the entire TableLayout and therefore adding my TableRows? This is not working.
}
}
Through various tests with TextViews and Toasts I have gathered that the tblLayout should be filled and the TableRows are added to the Layout, the only thing that is not working is the "repainting" of my Layout. How do I achieve that?
Edit:
Apparently the thing that made this not work was actually the LayoutParams given to the TableRow, once I commented those out I atleast got it printed to the screen. They are however not where I expect them to be.
I expected them to be below the buttons, instead they are in the top left corner on top of the buttons. This leads me to believe that the TableLayout is actually the same size as the RelativeLayout but is layered above the RelativeLayout. The error should therefor lie in my XML-File. What height do I need to give my TableLayout to make this work the way I expect?
Edit2:
I needed to add the android:layout_below attribute to my TableLayout, works as a charm now!
You need to call the method "requestLayout()"
Call this when something has changed which has invalidated the layout of this view. This will schedule a layout pass of the view tree.
So, I create table view in XML to which the rows are added dynamically using the following java code:
private void fillTable(TableLayout tableLayout, String[] items) {
for (int i = 0; i < items.length; i++) {
TextView itemText = new TextView(FillingActivity.this);
itemText.setText(items[i]);
TableRow row = new TableRow(FillingActivity.this);
row.addView(itemText);
if(i % 2 == 1)
row.setBackgroundColor(color.LightGreen);
tableLayout.addView(row);
}
}
The code for a single tablelayout is the following:
<TableLayout
android:id="#+id/dinnertableviewing"
android:layout_width="346dp"
android:layout_height="wrap_content"
android:layout_x="2dp"
android:layout_y="210dp" >
</TableLayout>
But then when add many items to that table it overlaps with the space for the next tables
here is a picture that shows it:
Don't use AbsoluteLayout. The difficulties you're running into when an AbsoluteLayout contains content that can resize or when you run on differently sized screens (e.g. just about every Android device in the wild) are exactly why AbsoluteLayout is deprecated.
If you're trying to position elements vertically down the screen as they fit, use a LinearLayout with android:orientation="vertical".
Im posting from my phone so please excuse stupid typos and formatting issues.
I have an activity which lists saved games that the player can load.
I created a simple layout xml file which defines a ScrollView. On load, I grab all the saved games and programatically add a view for each saved game to a vertically oriented LinearLayout child of the ScrollView.
The view for each game consists of a Horizontally oriented LinearLayout which in turn contains a Button and a vertically oriented LinearLayout. That LinearLayout in turn contains some TextViews and ImageViews (and one more LinearLayout which I'm ommitting here for the sake of clarity).
The hierarchy looks something like this (some details omitted).
ScrollView
LinearLayout - vertical
Each saved game:
LinearLayout - horizontal
Button - load game
LinearLayout - vertical
TextView - game name
TextView - date string
My problem:
I would like the top of the button and the "game name" texview to be vertically aligned but the TextView (or maybe it's LinearLayout parent) has some rogue padding on top that I can't get rid of. See screenshot for details.
LoadSaved class:
Note: mScrollView is badly named. It refers to the ScrollView's child LinearLayout.
public class LoadSaved extends Activity {
public LinearLayout mScrollView;
private MinerDb mDb;
public void onCreate(Bundle b) {
super.onCreate(b);
setContentView(R.layout.loadsaved);
mDb = new MinerDb(this);
mScrollView = (LinearLayout) findViewById(R.id.load_scroll_view);
Bundle[] savedGames = mDb.getSavedGames();
for (int i = 0; i < savedGames.length; i++) {
Bundle game = savedGames[i];
final int gameId = game.getInt("gameId");
String name = game.getString("name");
String date = game.getString("date");
Bundle player = game.getBundle("player");
int playerMoney = player.getInt("money");
int playerHealth = player.getInt("health");
LinearLayout gameContainer = new LinearLayout(getApplicationContext());
gameContainer.setPadding(5, 5, 5, 5);
gameContainer.setGravity(Gravity.TOP);
gameContainer.setOrientation(LinearLayout.HORIZONTAL);
gameContainer.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
Button loadButton = new Button(getApplicationContext());
loadButton.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
loadButton.setText("Load");
LinearLayout gameInfo = new LinearLayout(getApplicationContext());
gameInfo.setOrientation(LinearLayout.VERTICAL);
gameInfo.setPadding(10,0,10,10);
gameInfo.setGravity(Gravity.TOP);
gameInfo.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
TextView nameView = new TextView(getApplicationContext());
nameView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
nameView.setGravity(Gravity.TOP);
nameView.setText(name);
TextView dateView = new TextView(getApplicationContext());
dateView.setPadding(5,0,0,0);
dateView.setGravity(Gravity.TOP);
dateView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
dateView.setText(date);
LinearLayout playerView = new LinearLayout(getApplicationContext());
playerView.setOrientation(LinearLayout.HORIZONTAL);
playerView.setPadding(5,0,0,0);
playerView.setGravity(Gravity.TOP);
playerView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
TextView playerMoneyView = new TextView(getApplicationContext());
playerMoneyView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
playerMoneyView.setPadding(0,0,10,0);
playerMoneyView.setTextColor(Color.GREEN);
playerMoneyView.setText("$" + playerMoney);
TextView playerHealthView = new TextView(getApplicationContext());
playerHealthView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
playerHealthView.setPadding(0,0,10,0);
playerHealthView.setTextColor(Color.RED);
playerHealthView.setText(playerHealth + "%");
playerView.addView(playerMoneyView);
playerView.addView(playerHealthView);
gameInfo.addView(nameView);
gameInfo.addView(dateView);
gameInfo.addView(playerView);
gameContainer.addView(loadButton);
gameContainer.addView(gameInfo);
mScrollView.addView(gameContainer);
loadButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Log.e("LoadSaved", "LoadSaved::onCreate: Clicking: " + gameId);
Intent loadGameIntent = new Intent(LoadSaved.this, Miner.class);
loadGameIntent.putExtra("load_game", gameId);
startActivity(loadGameIntent);
finish();
}
});
}
}
}
loadsaved.xml
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/load_scroll_view" />
</ScrollView>
</LinearLayout>
If you want any kind of alignment, why don't you use a RelativeLayout? That's basically designed to align one view with another. android:layout_alignTop sounds like something you want.
(And, of course, verify that the padding values are the same in all controls, but I'm sure you did that.)
Why don't you try using a ListView for that kind of gui.
You will still need to define a row xml.
+1 to the answers suggesting ListView and RelativeLayout. For this type of situation you probably want a ListView with an item layout using RelativeLayout. (ListView will scale much better if there are many items, and if this is for a list of saved games it seems like this could grow quite a bit.) For this type of UI it's recommended to have the whole row/list item clickable rather than use a small Load button, but that's a design issue and ultimately up to you.
Don't use getApplicationContext for creating your views. Activity is a Context, just pass this in your case.
By default LinearLayouts try to align child views by their text baseline if present. Note that the bottom of your button's Load text aligns perfectly with the CURRENT_GAME text in your screenshot. Try gameContainer.setBaselineAligned(false).
Normally your gameInfo layout would only report the baseline of one of its children if you set a baselineAlignedChildIndex, but it looks like this behavior changed between cupcake and eclair when creating LinearLayouts programmatically. (Link to the commit that changed it in AOSP here.)