What's wrong with my code, I'm trying to display my TextView named "invalid", in different locations (left,right,center), but the gravity (left,right,center) won't work!
My text.xml is
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="20dp" >
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/etext"
android:hint="#string/comment"
android:inputType="textPassword"/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="100">
<Button
android:id="#+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/button"
android:layout_weight="25"/>
<ToggleButton
android:id="#+id/toggleButton1"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:text="ToggleButton"
android:layout_weight="75"
android:checked="true"
android:paddingLeft="15dp"/>
</LinearLayout>
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/invalid"
android:layout_gravity="center"
android:gravity="center" />
</LinearLayout>
My TextPlay.java is
public class TextPlay extends Activity {
Button button;
ToggleButton tbutton;
TextView tview;
EditText et;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.text);
button = (Button) findViewById(R.id.button1);
tbutton = (ToggleButton) findViewById(R.id.toggleButton1);
tview = (TextView) findViewById(R.id.textView1);
et = (EditText) findViewById(R.id.etext);
tbutton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (tbutton.isChecked()) {
et.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
} else {
et.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);
}
}
});
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
String input = et.getText().toString();
System.out.println(input);
if (input.contentEquals("left")) {
tview.setGravity(Gravity.LEFT);
} else if (input.contentEquals("right")) {
System.out.println("inside right");
tview.setGravity(Gravity.RIGHT);
} else if (input.contentEquals("right")) {
tview.setGravity(Gravity.CENTER);
}
}
});
}
}
You set this text view a width of "wrap_content" it means, what ever the text is, the view take the size of the text.
and in the LinearLayout , the default gravity (used here) is 'center'
you should try this :
<TextView
android:id="#+id/textView1"
android:layout_width="match_parent" <= change this
android:layout_height="wrap_content"
android:text="#string/invalid"
android:gravity="center" <= then this gravity will be taken into account
/>
99% of the time, not working properly == not used properly.
You are mistaking gravity and layout_gravity.
gravity is the way the text will align itself in the TextView. The TextView being in wrap_content this does nothing, as the TextView is exactly the size of the text.
layout_gravity is the way the TextView will align itself in its parent, in your case in the vertical LinearLayout
You have given your TextView width wrap_content, and that is the problem, Check below code and replace it to your code.
<TextView
android:id="#+id/txtInvalid"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/invalid"
android:gravity="center"
/>
One reason why gravity does not work properly can be if you have gravity and textAlignment
If you put it like this
<TextView
android:id="#+id/textView1"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:gravity="center|center_horizontal"
android:textAlignment="viewStart"
Android studio editor will give this warning:
Inconsistent alignment specification between textAlignment and gravity attributes: was center|center_horizontal, expected start (Incompatible direction here)
But if you add textAlignment inside the styles then it doesn't complain.
This can be the issue why your gravity value will not work
<TextView
android:id="#+id/textView2"
style="#style/Widget.App.TextView.Label.Default"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:gravity="center|center_horizontal"
Check this answer for the difference between them:
Text/Layout Alignment in Android (textAlignment, gravity)
set android:layout_width="fill_parent" for textView1
Make sure you don't have something like that hanging around
app:layout_box="left|top"
Related
My java code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
final TextView textView = (TextView) findViewById(R.id.text1);
final Button button = (Button) findViewById(R.id.button1);
button.post(new Runnable() {
#Override
public void run() {
int buttonWidth = button.getWidth();
int textWidth = textView.getWidth();
button.setWidth(buttonWidth-textWidth);
}
});
My xml views:
<Button
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Timer"
android:textSize="16sp"/>
<TextView
android:id="#+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="8dp"
android:text="+5"/>
I'm using the second way as described in this answer.
What I want to do is have the button fill the entire width with just enough space for the textView. I've been learning Android for the last few months only so it'll be helpful if you could explain in a lucid manner.
you can use a linearlayout with your button having a weight of 1 and your textview to wrap content.
try this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="some text" />
</LinearLayout>
Use the addOnGlobalLayoutListener instead from the solution you linked, that usually works for me when I see this issue.
myView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
if (Build.VERSION.SDK_INT > 16) {
myView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
else {
myView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
myView.getWidth();
}
});
I have an ExpandableListView whose children are a RelativeLayout of four LinearLayouts that contain TextViews which will pull answers to a question and assign that question a score from 1-4 (bad, mediocre, good, and world class respectively), and finally an EditText for the user to leave comments on why they rated the question that score. When the user clicks a score box, the background changes colour to highlight the selected score, and sets the other score box colours back to their default colour to show that they are no longer selected. Below is my Java to show how this works:
// ChildView views
badScoreView = convertView.findViewById(R.id.qwedit_main_badView);
mediocreScoreView = convertView.findViewById(R.id.qwedit_main_mediocreView);
goodScoreView = convertView.findViewById(R.id.qwedit_main_goodView);
worldclassScoreView = convertView.findViewById(R.id.qwedit_main_wcView);
badScoreTextView = (TextView) convertView.findViewById(R.id.qwedit_main_badTextView);
mediocreScoreTextView = (TextView) convertView.findViewById(R.id.qwedit_main_mediumTextView);
goodScoreTextView = (TextView) convertView.findViewById(R.id.qwedit_main_goodTextView);
worldClassScoreTextView = (TextView) convertView.findViewById(R.id.qwedit_main_worldclassTextView);
questionCommentEditText = (EditText) convertView.findViewById(R.id.qwedit_main_commentEditText);
// TODO: TextView score subcategory setters
badScoreView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO: add logic to change score
subCategoryScore = 1;
badScoreView.setBackgroundColor(Color.parseColor("#eca9a7"));
mediocreScoreView.setBackgroundColor(Color.parseColor("#f0ad4e"));
goodScoreView.setBackgroundColor(Color.parseColor("#5cb85c"));
worldclassScoreView.setBackgroundColor(Color.parseColor("#0275d8"));
questionCommentEditText.clearFocus();
}
});
mediocreScoreView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO: add logic to change score
subCategoryScore = 2;
badScoreView.setBackgroundColor(Color.parseColor("#d9534f"));
mediocreScoreView.setBackgroundColor(Color.parseColor("#f7d6a6"));
goodScoreView.setBackgroundColor(Color.parseColor("#5cb85c"));
worldclassScoreView.setBackgroundColor(Color.parseColor("#0275d8"));
questionCommentEditText.clearFocus();
}
});
goodScoreView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO: add logic to change score
subCategoryScore = 3;
badScoreView.setBackgroundColor(Color.parseColor("#d9534f"));
mediocreScoreView.setBackgroundColor(Color.parseColor("#f0ad4e"));
goodScoreView.setBackgroundColor(Color.parseColor("#addbad"));
worldclassScoreView.setBackgroundColor(Color.parseColor("#0275d8"));
questionCommentEditText.clearFocus();
}
});
worldclassScoreView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO: add logic to change score
subCategoryScore = 4;
badScoreView.setBackgroundColor(Color.parseColor("#d9534f"));
mediocreScoreView.setBackgroundColor(Color.parseColor("#f0ad4e"));
goodScoreView.setBackgroundColor(Color.parseColor("#5cb85c"));
worldclassScoreView.setBackgroundColor(Color.parseColor("#80baeb"));
questionCommentEditText.clearFocus();
}
});
And the layout, just in case that is relevant:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/qwedit_elv_item_score_container"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/qwedit_main_badView"
android:layout_width="232.5dp"
android:layout_height="145.3dp"
android:background="#color/badScore">
<TextView
android:id="#+id/qwedit_main_badTextView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:textColor="#color/white"
android:textSize="20sp"
android:text="Bad"/>
</LinearLayout>
<LinearLayout
android:id="#+id/qwedit_main_mediocreView"
android:layout_width="232.5dp"
android:layout_height="145.3dp"
android:background="#color/mediocreScore">
<TextView
android:id="#+id/qwedit_main_mediumTextView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:textColor="#color/white"
android:textSize="20sp"
android:text="Mediocre"/>
</LinearLayout>
<LinearLayout
android:id="#+id/qwedit_main_goodView"
android:layout_width="232.5dp"
android:layout_height="145.3dp"
android:background="#color/goodScore">
<TextView
android:id="#+id/qwedit_main_goodTextView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:textColor="#color/white"
android:textSize="20sp"
android:text="Good"/>
</LinearLayout>
<LinearLayout
android:id="#+id/qwedit_main_wcView"
android:layout_width="232.5dp"
android:layout_height="145.3dp"
android:background="#color/worldclassScore">
<TextView
android:id="#+id/qwedit_main_worldclassTextView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:textColor="#color/white"
android:textSize="20sp"
android:text="World Class"/>
</LinearLayout>
</LinearLayout>
<EditText
android:id="#+id/qwedit_main_commentEditText"
android:layout_width="930dp"
android:layout_height="wrap_content"
android:layout_below="#+id/qwedit_elv_item_score_container"
android:cursorVisible="false"
android:focusable="true"
android:focusableInTouchMode="true"
android:inputType="text"
android:hint="Comments"/>
</RelativeLayout>
For some reason, when the user presses the EditText and either adds text or clicks out of it, the button onClick() functions no longer work (i.e., they no longer change colour).
Is this due to something with focus? the javacode onClick functions are in a CustomListViewAdapterin order to be able to inflate the same ExpandableListView for as many Questions as I will have (somewhere around 200 or so).
As far as I understood the problem is with the focus of the View. You might need to use an OnFocusChangeListener and then check if the focus event happened when the screen was in touch mode.
Or you could try to add these lines inside each onClick(View view) method:
view.setFocusableInTouchMode(true);
view.requestFocus();
view.setFocusableInTouchMode(false);
This way, view will get focus and you could do something inside the onClick() method after these lines of code, after the view was again set into setFocusableInTouchMode(false);
I am making a quiz app hence I wanted my MenuButton and NextButton view Invisible at the beginning but after satisfying a particular condition I wanted the View to be visible again hence I used findViewById(R.id.MenuButton).setVisibility(View.VISIBLE); and same for the NextButton but still these view were Invisible.What am I doing wrong?
<?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:layout_gravity="center">
<TextView
android:id="#+id/Question"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="46dp"
android:text="TextView"
android:gravity="center"
android:textSize="25dp"
android:textColor="#000000"/>
<RadioButton
android:id="#+id/radioButton1"
android:layout_width="wrap_content"
android:layout_height="25dp"
android:text="RadioButton1"
android:textSize="20sp"
android:textColor="#000000"
android:layout_marginLeft="43dp"
android:layout_marginStart="43dp"
android:layout_marginTop="54dp"
android:layout_below="#+id/Question"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:onClick="On_RadioButton1_Click"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/linearLayout"
android:orientation="horizontal"
android:layout_marginTop="55dp"
android:layout_below="#+id/radioButton4"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<Button
android:id="#+id/MenuButton"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginLeft="40dp"
android:textSize="20dp"
android:text="menu" />
<Button
android:id="#+id/NextButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20dp"
android:layout_marginLeft="125dp"
android:text="next" />
</LinearLayout>
</RelativeLayout>
//Java file
private int Question_no=0;
private Boolean Boolean_Var=false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_question1);
String[] Question_Array = getResources().getStringArray(R.array.Question1);
TextView Questions = (TextView) findViewById(R.id.Question);
Questions.setText(Question_Array[Question_no]);
String[] Radio_Button1_Array = getResources().getStringArray(R.array.Option_1);
RadioButton Radio_Button1 = (RadioButton) findViewById(R.id.radioButton1);
Radio_Button1.setText(Radio_Button1_Array[Question_no]);
findViewById(R.id.MenuButton).setVisibility(View.INVISIBLE);
findViewById(R.id.NextButton).setVisibility(View.INVISIBLE);
}
public void On_RadioButton1_Click(View view)
{
if(Boolean_Var==false)
{
String[] CorrectAns_Array = getResources().getStringArray(R.array.Answer1);
String CorrectAns = CorrectAns_Array[Question_no];
String[] Answer_Array = getResources().getStringArray(R.array.Option_1);
String Answer = Answer_Array[Question_no];
if(Answer.equals(CorrectAns))
{
RadioButton Right_Ans = (RadioButton) findViewById(R.id.radioButton1);
Right_Ans.setTextColor(Color.GREEN);
AnswerSubmitted();
}
else
{
RadioButton Wrong_Ans = (RadioButton) findViewById(R.id.radioButton1);
Wrong_Ans.setTextColor(Color.RED);
GreenTick();
AnswerSubmitted();
}
}
Boolean_Var=true;
}
public void AnswerSubmitted()
{
findViewById(R.id.MenuButton).setVisibility(View.VISIBLE);
findViewById(R.id.NextButton).setVisibility(View.VISIBLE);
}
You should get a reference to your buttons and call setVisibility on the reference. What you're currently doing is setting visibility INVISIBLE on one reference and setting it VISIBLE on another.
Button nextButton;
//in onCreate
nextButton = (Button)findViewById(R.id.nextButton);
nextButton.setVisibility(View.INVISIBLE);
//in AnswerSubmitted
nextButton.setVisibility(View.VISIBLE);
I think you should tell android that you want to execute that method when your radiobutton is clicked. by adding :
Radio_Button1.setOnClickListener(new OnClickListener (){
public void onClick(View v) {
On_RadioButton1_Click(v);
}
});
So you can get that method executed everytime you click.
Add it at the end of OnCreate
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...
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.