Hii
I was coding for an application that shows the list of running process and i was using TextView to display the running process in screen.
I was trying 2 different method for displaying the TextView.
In one method i was declearing the TextView in the code itself
TextView tv = new TextView(this);
this.setContentView(tv);
In the second method i was declearing the layout in the main.xml file
setContentView(R.layout.main);
TextView tv=(TextView) findViewById(R.id.RunApp);
For both the methods i am using the setMovementMethod for having the scroll movement for my TextView
tv.setMovementMethod(new ScrollingMovementMethod());
The program is running fine in the emulator.But if i am using the second method then the scrolling is not happening if i am running the application in my mobile. In the emulator its working fine. Why is it behaving differently in my Android 2.1 Samsung Galaxy S??
Why the scrolling not happening in the second method??. Scrolling is happening in the first method without any issues in my mobile.
This is my code..
public class listRunningApps extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
//TextView tv=(TextView) findViewById(R.id.RunApp);
TextView tv = new TextView(this);
this.setContentView(tv);
tv.setMovementMethod(new ScrollingMovementMethod());
ActivityManager actvityManager = (ActivityManager)
this.getSystemService( ACTIVITY_SERVICE );
List<RunningAppProcessInfo> procInfos = actvityManager.getRunningAppProcesses();
for(int j=0; j < 2; j++)
/*I have done iteration 2 times so that we have a long process list
sufficeint enough for scrolling*/
{
for(int i = 0; i < procInfos.size(); i++)
{
tv.setText(tv.getText().toString()+procInfos.get(i).processName+
" " + String.valueOf(procInfos.get(i).processName.length())+"\n");
}
tv.setText(tv.getText().toString()+"----------------------------"+"\n");
}
}
}
This is my main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="#+id/jsttxt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Testing TextView Scrolling"/>
<TextView
android:id="#+id/RunApp"
android:layout_marginLeft="30px"
android:layout_marginRight="30px"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/jsttxt"
/>
</RelativeLayout>
In the first method the scrolling is coming in my mobile without any issue..Can you guys help me why the scrolling is not happening in my mobile in the second method, where as its working properly in my emulator??
why not you are putting your textview in scrollview in your xml layout. try that i think it work
I have modified the main.xml with the scrollview as suggested by ud_an
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="#+id/jsttxt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Testing TextView Scrolling"/>
<ScrollView android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/RunApp"
android:layout_marginLeft="30px"
android:layout_marginRight="30px"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/jsttxt"
/>
</ScrollView>
</RelativeLayout>
Now scrolling is working in the second method too.. Thanks ud_an
But why the emulator and my mobile acting indifferently in the previous case where in emulator scrolls and in mobile no scroll???
Related
I have a code to change text as on create
public class MainActivity : Activity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
Button btnbut = FindViewById<Button>(Resource.Id.btnbut);
TextView txtvw = FindViewById<TextView>(Resource.Id.txtView);
txtvw.Text = "Hello World";
btnbut.Text = "Hello WOrld";
}
}
My main.axml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:gravity="center_horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/linearLayout1">
<TextView
android:layout_width="match_parent"
android:layout_height="47.5dp"
android:id="#+id/txtView"
android:layout_marginLeft="1.0dp"
android:layout_marginRight="0.0dp" />
<Button
android:text="Button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/btnbut" />
</LinearLayout>
When I run and open app with emulator the Text has remain the same as define on main.axml not the text define OnCreate.
Your code is correct and should result in:
Try performing a clean all/build all on your solution and retry your app on the emulator again.
Note: If it is still not updating the app on the emulator correctly:
Within the emulator:
Setting / Apps / Select your app / *Uninstall*
i think i got your i dont use xamrain but i think this is the error try changing
SetContentView(Resource.Layout.Main);
to
SetContentView(Resource.Layout.My main);
coz your layout name is "My main" not "main"
Found a Solution!
I now use a ViewPager instead of a ViewFlipper.
The Views are now generated within my run() method (which is already there because I fetch data from the web) and saveed in a Map.
In my Handler I only call pagerAdapter.notifyDataSetChanged() the pagerAdapter uses the Map of views and it works smooth and fast.
So I'm now looking for a away to have the ViewPager scroll endless, but thats another problem not connected to this one ;)
Thank all of you for your answers and keep up the good support.
I'm quite new to Android development and facing a problem while inflating a (huge) layout.
I getting some Data from a Webservice which works fine then i'm using a handler within my Activity to bring this data to the frontend. Here is my handleMessage:
public void handleMessage(Message msg) {
LayoutInflater inflater = getLayoutInflater();
List<Integer> gamedays = new ArrayList<Integer>(games.keySet());
Collections.sort(gamedays);
for (Integer gameday : gamedays) {
View gamedaytable = inflater.inflate(R.layout.gamedaytable, null);
TableLayout table = (TableLayout) gamedaytable.findViewById(R.id.gameDayTable);
table.removeAllViews();
List<Game> gamelist = games.get(gameday);
int rowcount = 2;
for (Game game : gamelist) {
View tableRow = inflater.inflate(R.layout.gamedayrow, null);
TextView homeTeam = (TextView) tableRow.findViewById(R.id.gameDayHome);
TextView awayTeam = (TextView) tableRow.findViewById(R.id.gameDayAway);
TextView gameResult = (TextView) tableRow.findViewById(R.id.gameDayResult);
gameResult.setBackgroundResource(R.drawable.resultbackground);
homeTeam.setText(game.getHomeTeam().getName());
awayTeam.setText(game.getAwayTeam().getName());
if (game.getHomegoals() < 0 || game.getAwaygoals() < 0) {
gameResult.setText("-:-");
} else {
gameResult.setText(game.getHomegoals() + ":" + game.getAwaygoals());
}
if (rowcount % 2 == 0) {
tableRow.setBackgroundColor(0xffdee0dd);
} else {
// setting alternative background
tableRow.setBackgroundColor(0xfff1f3f0);
}
rowcount++;
table.addView(tableRow);
}
flipper.addView(gamedaytable);
}
flipper.setDisplayedChild(thisgameday - 1);
pd.dismiss();
}
My Problem is that this code runs quite slow and d the processdialog freezes for about 1 second before it disappears and the layout is shown.
games consists of 34 entries which contains 9 entries by itself.
So I'm adding 34 Views consisting of a relativeLayout () which holds the table
I think the problem is, that android starts to draw and calculte the layout and this takes too long.
If I'm correct i can not use AsynTask because i can not do UI stuff there and im doing UI stuff only.
I looking for a way to have the process dialog not freezing while doing this.
Or maybe I'm doing some completly wrong
R.layout.gamedaytable:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff1f3f0"
android:focusableInTouchMode="false" >
<TableLayout
android:id="#+id/gameDayTable"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:focusableInTouchMode="false" >
</TableLayout>
</RelativeLayout>
R.layout.gamedayrow:
<TableRow xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tableRow1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:focusableInTouchMode="false"
android:paddingBottom="5dp"
android:paddingTop="5dp" >
<TextView
android:id="#+id/gameDayHome"
style="#style/textsizeSmallScreen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:text="Mannschaft 1" />
<TextView
android:id="#+id/textView2"
style="#style/textsizeSmallScreen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:text=":" />
<TextView
android:id="#+id/gameDayAway"
style="#style/textsizeSmallScreen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Mannschaft 2" />
<TextView
android:id="#+id/gameDayResult"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="5dp"
android:background="#drawable/resultbackground"
android:paddingLeft="10dip"
android:text="0:5"
android:textColor="#FFFFFF"
android:textSize="11dp"
android:textStyle="bold"
android:typeface="monospace" />
</TableRow>
Additional Info:
This is how the Table should look like.
So i'm not sure if this should really be a ListView because for me its tabledata ;)
table
You seem to be building a list, you should probably look at using a ListView, which'll have the advantages of only needing to build the UI for the number of rows currently being shown, and to also do view re-use, so that you don't need to inflate as many rows.
Found a Solution!
I now use a ViewPager instead of a ViewFlipper. The Views are now generated within my run() method (which is already there because I fetch data from the web) and saveed in a Map. In my Handler I only call pagerAdapter.notifyDataSetChanged() the pagerAdapter uses the Map of views and it works smooth and fast. So I'm now looking for a away to have the ViewPager scroll endless, but thats another problem not connected to this one ;)
Thank all of you for your answers and keep up the good support.
It is better to go for Listview. Even we can add more than one design of rows in the listview in an optimized manner which will improves the performance better.
You definitely can do this on an AsyncTask. While you cannot update the UI on the doInBackground method of an AsyncTask, you can from the onProgressUpdate.
I would break up the code so you are iterating through items while in doInBackground, call publishProgress for each item, and then do the UI updates for the item when you get a callback in onProgressUpdate.
I have a activity in Android TextView followed ListView again TextView. The content of first TextView fills the whole screen and in order to see the ListView and second TextView the user has to scrolldown. Now I wish to show the second TextView when activity start instead of first TextView.
Instead I want TextView2 to be visible when activity starts.
EDITED
Sample code as per advice of #Urban
public class FocusTestActivity extends Activity {
private static final String TAG = "FocusTestActivity";
ScrollView scroll;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView text1 = (TextView) findViewById(R.id.text1);
TextView text2 = (TextView) findViewById(R.id.text2);
TextView text3 = (TextView) findViewById(R.id.text3);
String hello = "We provide services to K-12 education sector."
+ "Our services include Feasibility report, Marketing, Curriculum design"
+ "Teachers planning, Design and Technology, Parents expectation"
+ "management, Transport planning, Day-to-day operations and Statutory"
+ "compliances. Please find a brief introduction attached with mail. Also visit"
+ "www.wissenways.com We can help you with overall process of setting-up school. We have"
+ "experience include establishing International, pre-school and CBSE"
+ "schools from scratch. Please feel free to contact if you need some help in your school venture."
+ "Best of Luck!<br/><br/>";
text1.setText(Html.fromHtml(hello));
text2.setText(Html.fromHtml(hello));
text3.setText(Html.fromHtml(hello));
ScrollView scroll = (ScrollView) findViewById(R.id.scrollcontainer);
}
public void onStart() {
super.onStart();
Log.d(TAG,"Inside onStart");
scroll.post(new Runnable() {
#Override
public void run() {
scroll.fullScroll(ScrollView.FOCUS_DOWN);
}
});
}
}
XML Code
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/scrollcontainer"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="#+id/text1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello"
android:textSize="17sp"/>
<TextView
android:id="#+id/text2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello"
android:textSize="17sp"/>
<TextView
android:id="#+id/text3"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello"
android:textSize="17sp"/>
</LinearLayout>
</ScrollView>
LOGCAT output:
getScrollView().post(new Runnable() {
#Override
public void run() {
getScrollView().fullScroll(ScrollView.FOCUS_DOWN);
}
});
Using this code in the onCreate should start the scrollview (in which your list and two text views are) at the bottom position. I dont know why you would want to do that, and im guessing there could be a better way to do what you want rather than forcing the scroll position to the bottom, but anyways...
This is the question from where the above code is taken from, you couldve searched for it.
Hope this helped.
Here are 3 simple options i can give you:
Change there places
Make another activity with the second textview and launch that activity first then show you current one
Show a Toast with the text in the second textview at the start of your activity (problem with this one is the user closes it and you want to show it again or user wants to see it again you need to launch a new toast)
I don't fully understand your difficulty with this problem
EDIT:
when must the first textview display at the top? if never just do the first option :\ if under some event, have a empty textview at the top and at the bottom and by code change it's text to what you want at the moment you want
You could also use in your xml file a RealtiveLayout
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_height="fill_parent"
android:layout_width="fill_parent">
<TextView
android:id="#+id/txtview2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ListView
android:id="#id/android:list"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_below="#id/textview2/>
<TextView
android:id="#+id/txtview1"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_below="#id/android:list"/>
</RelativeLayout>
I've created a countdown timer that counts Days:Hrs:Mins:Sec. using regular text view and updating it using my handler works fine for me.
however I want to create a cool animation for the changing digits:
1st Q:
I have 2 options as I see it to draw the numbers:
1. using a home made font applied with a style
2. using a textview/btn with no text on them and applying a backrgound image using setBackgroundResource()
--what should I choose?
2nd Q:
I've created a wrapper for ViewFlipper(not extending it)
public class transitionair extends Activity {
SpecialFlipperWrapper m_thousand;
SpecialFlipperWrapper m_hundred;
SpecialFlipperWrapper m_tens;
SpecialFlipperWrapper m_ones;
#Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
ViewFlipper flipper_Tsnds=(ViewFlipper)findViewById(R.id.yearThousand);
m_thousand = new SpecialFlipperWrapper(flipper_Tsnds, this, 9);
ViewFlipper flipper_Hndrds=(ViewFlipper)findViewById(R.id.yearHundread);
m_hundred = new SpecialFlipperWrapper(flipper_Hndrds, this, 9);
ViewFlipper flipper_Tns=(ViewFlipper)findViewById(R.id.yearTens);
m_tens = new SpecialFlipperWrapper(flipper_Tns, this, 9);
ViewFlipper flipper_Ons=(ViewFlipper)findViewById(R.id.yearOnes);
m_ones = new SpecialFlipperWrapper(flipper_Ons, this, 9);
m_thousand.startFlipping();
m_hundred.startFlipping();
m_tens.startFlipping();
m_ones.startFlipping();
}
}
however trying to fetch one of the latter views that come after the yearThousand id are retrieving null
XML I'm Using is:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<ViewFlipper
android:id="#+id/yearThousand"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ViewFlipper
android:id="#+id/yearHundread"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ViewFlipper
android:id="#+id/yearTens"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ViewFlipper
android:id="#+id/yearOnes"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
ps xml's for the animation itself are working so I left them out
Main questions is: can I make it better?
second question is: how?
third question is why is my layout returning null on the second call to it and how can I avoid it?
10XX
I have a bug with my activity.
I have three view stubs in my linear layout like so -
<ViewStub
android:id="#+id/index_1"
android:layout="#layout/index_edittext"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<ViewStub
android:id="#+id/index_2"
android:layout="#layout/index_edittext"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<ViewStub
android:id="#+id/index_3"
android:layout="#layout/index_edittext"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
my onCreate conditionally checks what to inflate:
for (int i = 0; i < 3; i++) {
int id = convertIndexToId(i); //will turn i into R.id.index_1
ViewStub stub = findViewById(id);
if (bShouldBeSpinner) {
stub.setLayoutResource(R.layout.index_spinner);
View root = stub.inflate();
Spinner spin = (Spinner)root.findViewById(R.id.my_spinner);
spinner.setAdapter(adapter);
spinner.setSelection(0);
}
else {
stub.setLayoutResource(R.layout.index_edittext);
View root = stub.inflate();
EditText et = (EditText)root.findViewById(R.id.my_edittext);
//et.phoneHome(); just kidding
et.setText(String.valueOf(System.currentTimeMillis()));
}
}
I force bShouldBeSpinner to false. The output of the edittext's is as follows:
1300373517172
1300373517192
1300373517221
However, when I rotate the screen and onCreate is called a second time the output is this:
1300373517221
1300373517221
1300373517221
Initially that made me think you should only inflate the view once, and the heirarchy is kept inbetween onCreate's... however when i only run it the first time the second time no views are shown for the stubs.
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Spinner style="#style/SearchInput" android:id="#+id/my_spinner" />
</LinearLayout>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<EditText style="#style/SearchInput" android:id="#+id/my_edittext" />
</LinearLayout>
I feel the documentation is assuming something that I did not notice or am missing. Does anyone see what I am doing wrong?
EDIT
I added to the view stubs android:inflatedId="index_1_root"... etc
it is the strangest thing, when I add these lines after the for loop:
EditText v = indexRoot1.findViewById(R.id.index_edit_text);
Log.d(TAG, "EditTExt: " + v);
EditText v2 = indexRoot2.findViewById(R.id.index_edit_text);
Log.d(TAG, "EditTExt: " + v2);
the output says (I believe) they are references to different EditTexts.
EditTExt: android.widget.EditText#47210fe8
EditTExt: android.widget.EditText#47212ba8
So they are getting inflated again, but the text is set to what the last edittext was set to on the first pass.
There may be some issues when recreating views of different types with the same id.
ViewStub is replaced by inflated view.
I suggest using
setInflatedId(int inflatedId)
to distinguish inflated views.
Hope that help.
Instead of using ViewStubs, I added an id to the root of those stubs (android:id="index_roots") and used
view.addView( (isSpinner) ?
new Spinner(this) : new EditText(this) );
to fix this problem, I will however not accept this answer right away, I'll allow others to answer using the method I was going for.