We Keep Coding

TextView not appearing in embedded LinearLayout

I am creating a simple tasklist app, and I want to programmatically add a TextView to an embedded LinearLayout. However, it is not showing up for some reason.
I try to add the TextView in MainActivity (irrelevant code removed).
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);
processExtraData();
}
private void processExtraData(){
Integer hours = 4;
Integer minutes = 35;
Integer seconds = 0;
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.linlayout);
TextView txt1 = new TextView(this);
final float scale = this.getResources().getDisplayMetrics().density;
int pixels = (int) (64 * scale + 0.5f);
ViewGroup.LayoutParams params = new LinearLayout.LayoutParams(0, pixels, 1f);
txt1.setLayoutParams(params); txt1.setText(hours.toString()+":"+minutes.toString()+":"+seconds.toString());
linearLayout.addView(txt1);
}
The embedded LinearLayout is declared in activity_main:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Super Reminder App!"
android:textAppearance="#style/TextAppearance.AppCompat.Large" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:layout_marginBottom="12dp"
android:orientation="horizontal">
<EditText
android:id="#+id/taskAdd"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="3.5"
android:hint="New Task" />
<Button
android:id="#+id/add"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.5"
android:text="Add Task" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="12.5"
android:orientation="horizontal">
<ListView
android:id="#+id/tasks"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2.5"/>
<LinearLayout
android:id="#+id/linlayout"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:orientation="vertical"/>
</LinearLayout>
<Button
android:id="#+id/clearButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="Clear All" />
</LinearLayout>
I have already tested and made sure that onNewIntent and processExtraData are called. No errors are thrown either. Could this be a GUI issue? Any help would be greatly appreciated.

Parent LinearLayout Not Limiting Size of Inner TextView Set To WRAP_CONTENT

I have a LinearLayout set to a static height of 100dp. I then have a textView inside it on which I set height to WRAP_CONTENT. The problem is the textView is causing the LinearLayout to expand fully to accommodate the textView when the height of the textView is greater than 100dp
I set it up this way because I want to be able to show and hide the full text when the user clicks a button. I thought setting the linearlayout's height to some minimum and then updating it to WRAP_CONTENT when clicked would work, but when I try to limit the height, the LinearLayout ignores it. I tried to set clipChildren to true but that didn't help. Code is below. I am using Android Annotations, but I don't think that's related to the problem.
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="30dp"
android:fitsSystemWindows="true"
android:background="#color/light_grey">
<LinearLayout
android:orientation="vertical"
android:clipChildren="true"
android:background="#color/white"
android:layout_width="match_parent"
android:layout_height="100dp">
<TextView
android:id="#+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
And the Java code:
#EActivity(R.layout.activity_test)
public class TestActivity extends AppCompatActivity {
#ViewById(R.id.text_view)
TextView textView;
String input;
public static final String INPUT_STRING_KEY = "inputStringKeyForParser";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.input = this.getIntent().getExtras().getString(INPUT_STRING_KEY);
}
#AfterViews
public void showText() {
textView.setText(input);
}
}
Does anyone know how to get the TextView to stop causing the linearlayout to expand? Thank you!

Try
<TextView
android:id="#+id/text_view"
android:layout_width="match_parent"
android:layout_height="100dp" />

Ok. I think that you can't apply height property this way because your layout is the child of ScrollView. Put your TextView inside another LinearLayout like this:
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="30dp"
android:fitsSystemWindows="true"
android:background="#color/light_grey">
<LinearLayout
android:orientation="vertical"
android:clipChildren="true"
android:background="#color/white"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="100dp">
<TextView
android:id="#+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
</LinearLayout>
</ScrollView>

Automatic scrolling a text view after appending text in Android

I'm trying to make the content of a textview to automatically scroll to the bottom at the most recent text appended. I tried many ways from many post but seems there's no way to make it work. I trie also different layout_wheight and width parameters and so on. The silly thing is that I already made it in the past and it worked, but now using the same set up it is not.
Here's my latest xml code:
<TableRow
android:id="#+id/tableRow1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.5"
android:weightSum="2">
<ScrollView
android:id="#+id/askScv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:scrollbars="vertical">
<TextView
android:id="#+id/askTxv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:maxLines="99999"
android:scrollbars="vertical"
android:text=""
android:textAppearance="?android:attr/textAppearanceLarge" />
</ScrollView>
<ScrollView
android:id="#+id/answerScv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:scrollbars="vertical">
<TextView
android:id="#+id/answerTxv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:maxLines="99999"
android:scrollbars="vertical"
android:text=""
android:textAppearance="?android:attr/textAppearanceLarge" />
</ScrollView>
</TableRow>
and the Java one:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mQuestionEdt = (EditText) findViewById(R.id.questionEdt);
mAnswerTxv = (TextView) findViewById(R.id.answerTxv);
mAnswerTxv.setMovementMethod(new ScrollingMovementMethod());
mAnswerScv=(ScrollView)findViewById(R.id.answerScv);
mAnswerScv.fullScroll(View.FOCUS_DOWN);
mAskTxv=(TextView) findViewById(R.id.askTxv);
mAskTxv.setMovementMethod(new ScrollingMovementMethod());
mAskScv=(ScrollView)findViewById(R.id.askScv);
mAskScv.fullScroll(View.FOCUS_DOWN);
mAskBtn = (ImageButton) findViewById(R.id.askBtn);
mAskBtn.setOnClickListener(this);
mStartBtn = (ImageButton) findViewById(R.id.startBtn);
mStartBtn.setOnClickListener(this);
}
#Override
public void onClick(View view) {
Bundle result;
if (view.equals(mAskBtn)) {
result=mAnsweringMachine.answer(mQuestionEdt.getText().toString());
mAskTxv.append("\n" + mQuestionEdt.getText().toString());
mAskScv.smoothScrollTo(0,mAskTxv.getBottom());
mAnswerTxv.append("\n" + result.getString(AnsweringMachine.DIALOGUE_RESULT));
mAnswerScv.smoothScrollTo(0,mAnswerTxv.getBottom());
} else if (view.equals(mStartBtn)) {
result = mAnsweringMachine.runStartingPrompt();
mAnswerTxv.append(result.getString(AnsweringMachine.DIALOGUE_RESULT));
//mAnswerScv.fullScroll(View.FOCUS_DOWN);
}
}
And here's my old working code, xml:
<ScrollView
android:id="#+id/terminalScv"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/terminalTxv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textAppearance="?android:attr/textAppearanceLarge" />
</ScrollView>
and Java one:
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_terminal);
terminalTxv=(TextView) findViewById(R.id.terminalTxv);
terminalScv=(ScrollView) findViewById(R.id.terminalScv);
terminalScv.fullScroll(View.FOCUS_DOWN);
}
#Override
protected void onBtDataReceived(int[] data) {
super.onBtDataReceived(data);
String out=String.valueOf(terminalTxv.getLineCount())+" - ";
for (int x=0;x<data.length-1;x++){
out+=data[x];
out+=" ";
}
out+="\n";
terminalTxv.append(out);
terminalScv.smoothScrollTo(0, terminalTxv.getBottom());
}
Hope somebody can make me understand this enigma....
Thanks!

In the XML for the textView element I would try to add:
android:gravity="bottom"
Also are you sure you need to specify android:scrollbars="vertical" in both scrollview and textview? In addition, I noticed the difference between old working version is that it doesn't uses setMovementMethod() - personally I would use this method without scrollview, but since you already have scroollview I don't see a reason why would you need it...

How can I implement a ListView within a LinearLayout?

I am trying to make a simple Checkbook app, whose MainActivity stores a list of transactions. I would like a TextView at the top and bottom of the screen that show the account balance and an option to add a new transaction, respectively. I would like a list of transactions in between that scroll. I was able to implement a ListView and add a header and footer view, but if the transaction list exceeds the size of the screen the headers and footers can scroll off screen.
Is there any way to position a ListView within the linear layout, or freeze the headers/footers to stay on the screen?
Here is my XML file so far:
<TextView
android:id="#+id/header_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#string/default_header_string">
</TextView>
<ListView
android:id="#+id/transaction_list_view"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ListView>
<TextView
android:id="#+id/footer_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#string/add_transaction_string">
</TextView>
And here is my onCreate, which has no syntax errors but I am unable to click the footerview to add a transaction:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_checkbook);
ListView list = (ListView) findViewById(R.id.transaction_list_view);
// Create a new Adapter
mAdapter = new TransactionAdapter(list.getContext());
// Inflate footerView and headerView
LayoutInflater inflater = getLayoutInflater();
TextView headerView = (TextView) inflater.inflate(R.layout.header_view, null);
TextView footerView = (TextView) inflater.inflate(R.layout.footer_view, null);
// Set listener for footerView
footerView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
Intent transactionIntent = new Intent(CheckbookActivity.this, AddTransactionActivity.class);
startActivityForResult(transactionIntent, ADD_TRANSACTION_REQUEST);
}
});
list.setAdapter(mAdapter);
}

use the below code. This will satisfy your requirement. I tried this and working for me.
Relative layout with below,above attributes. Relativelayout is better than Linear layout with weight method.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/relative"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent" >
<TextView
android:id="#+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentTop="true"
android:gravity="center_horizontal"
android:text="ListView Heading" />
<TextView
android:id="#+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
android:gravity="center_horizontal"
android:text="ListView Footer" />
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/textView1"
android:layout_above="#id/textView2"
></ListView>
The UI will like this

Try this way, hope this will help you to solve your problem.
Instead of using header/footer just put as below code in your XML:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="#+id/header_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/default_header_string">
</TextView>
<ListView
android:id="#+id/transaction_list_view"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
</ListView>
<TextView
android:id="#+id/footer_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/add_transaction_string">
</TextView>
</LinearLayout>

Yes, you can do it with weightsum and layout_weight in linearlayout and also you can create this type of view using RelativeLayout.
1) In LinearLayout just add weightsum="1" to your linearlayout and add layout_weight="0.2" to each of your header and footer and add layout_weight="0.6" to your listview.
2) In relativeLayout add alignParentTop to your header and alignParentBottom to your footer and set listview to layout_below="#+id/header" and layout_above="2+id/footer"

I found a possible solution for your problem from a similiar post. Hope this helps you.

For what you are trying to accomplish to freeze the header/footer. It will be easier to use a relative layout to position the header/footer then have your listview in the middle
<RelativeLayout ...>
<TextView
android:id="#+id/header_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:gravity="center"
android:text="#string/default_header_string">
</TextView>
<ListView
android:id="#+id/transaction_list_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/header_view"
android:layout_above="#+id/footer_view">
</ListView>
<TextView
android:id="#+id/footer_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:gravity="center"
android:text="#string/add_transaction_string">
</TextView>
</RelativeLayout>
You can use a LinearLayout for this task. But I don't recommend it as it's a bit "hacky".

Get all the elements in a array: Example:- (weatherArray)
Loop through all the elements :-
Example:-
mainLayout = ((LinearLayout)refreshObj.get("mainLayout"));
mainLayout.removeAllViews();
for (int i = 0; i < weatherArray.length(); i++) {
View childView = getLayoutInflater().inflate(R.layout.weather_row4_item, mainLayout,false);
TextView todayTempStatus = (TextView) childView.findViewById(R.id.todayTempStatus);
todayTempStatus.setText("");
}
This is an example without using listview, which we will populate lienarlayout using child view.

Change textview dynamically in Viewflipper

pretty easy question here, but I am not a java superuser quite yet.
I am using a ViewFlipper to provide a number of images, and a sliding-drawer to contain text specific to each image. I would like to have the text of the sliding drawer change to a specific string dependent on which child view is currently displayed.
Here is the 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:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:id="#+id/previous"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Prev" />
<Button
android:id="#+id/next"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Next" />
</LinearLayout>
<ViewFlipper
android:id="#+id/flipper"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView android:id="#+id/imageView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="#drawable/image1"></ImageView>
<ImageView android:id="#+id/imageView2" android:layout_height="wrap_content" android:layout_width="wrap_content" android:src="#drawable/image2"></ImageView>
</ViewFlipper>
</LinearLayout>
here is the java:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
flipper = (ViewFlipper)findViewById(R.id.flipper);
next = (Button) findViewById(R.id.next);
previous = (Button) findViewById(R.id.previous);
imageview1 = (ImageView)findViewById(R.id.imageView1);
imageview2 = (ImageView)findViewById(R.id.imageView2);
next.setOnClickListener(this);
previous.setOnClickListener(this);
}
#Override
public void onClick(View v) {
if (v == next) {
flipper.setInAnimation(inFromRightAnimation());
flipper.setOutAnimation(outToLeftAnimation());
flipper.showNext();
}
if (v == previous) {
flipper.setInAnimation(inFromLeftAnimation());
flipper.setOutAnimation(outToRightAnimation());
flipper.showPrevious();
}
}
I'm sure the answer is really obvious, but that's why I need your help....THANKS!

When you call showNext() and showPrevious(), update your TextView to match.