Android Note: TextView

Displays text to the user and optionally allows them to edit it. A TextView is a complete text editor, however the basic class is configured to not allow editing;

It can be either single line or multi-line. EditText also support Cut, Copy, Paste.

Long-Tap : Long tapping on edittext box showing Cut, copy, paste option.

Below exaple showing editText

id : Create id for your edittext like - android:id="@id/name"

Text

Set the text to textview

Code - android:text="your text here"

Text Size

Specify the size of the size.

Size of text like - 16dp, 20sp, 2em ( 1em= 16dp )

code  - android:textSize="16dp"



AutoResizing Width and Height


From Api level 26.
android:autoSizeTextType="uniform"
android:autoSizeMaxTextSize="24dp"
android:autoSizeMinTextSize="12dp"
android:autoSizeStepGranularity="2dp"

Text Alignment

Set Text Left, Right, Centre and more in EditText

code - android:textAlignment="center"

Text All Caps

Make all text Capital in Textview

must be a boolean ( true/False )

code -  android:textAllCaps="true"

Text Color

Set the color of the text.

Color should be Hexadecimal (#000000 - #ffffff), octal [Range 0-255] ( rgb(212,212,212,0.5 )

code - android:textColor="#12E9fa"

Background

Set the background color as a image, color.

code - android:background="@drawable/abc"

Text Style

Style (bold , italic, bolditalic) for the text.

Must be one or more (separated by '|') of the following constant values.

Value -

Normal - 0

Bold - 1

Italic - 2

code - android:textStyle="bold"

Typeface

Typeface (normal, sans, serif, monospace) for the text.

Must be one of the following constant values.

Value -

Normal - 0

Sans - 1

Serif - 2

Monospace - 3

code  - android:typeface="monospace"

Text Appearance

Default appearance of text: color, typeface, size, and style.

code - android:textAppearance="@style/TextAppearance.AppCompat.Large"

Some Attribute -

textAppearanceLarge : style for "large" text. Defaults to primary text color.

Text Color Highlight

Color of the text selection highlight.

code - android:textColorHighlight="#12e7ff"

Text Direction

Set the direction of the text

rtl for Right to Left direction.

code - android:textDirection="rtl"

Text Single Line

Constrains the text to a single horizontally scrolling line instead of letting it wrap onto multiple lines,

Must be boolean ( True / False )

code - android:singleLine="true"

Text Shadow color

Place a blurred shadow of text underneath the text, drawn with the specified color.

Must be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb" or hex (#ffaa77)

code - android:shadowColor="#aa6600"

Text ShadowDX

Horizontal offset of the text shadow.

Must be a floating point value, such as "1.2".

code - android:shadowDx="1.2"

Text ShadowDY

Vertical offset of the text shadow.

Must be a floating point value, such as "1.2".

code - android:shadowDy="1.2"

Text Shadow Radius

Blur radius of the text shadow.

Must be a floating point value, such as "1.2".

code - android:shadowRadius="1.2"

Text IsSelectable

Indicates that the content of a non-editable text can be selected.

Must be a boolean value, either "true" or "false".

code - android:textIsSelectable="true"

Text ScaleX

Sets the horizontal scaling factor for the text.

Must be a floating point value, such as "1.2".

Code - android:textScaleX="12"

Visibility

show or hide the edittext

Must be 'Visible', 'Invisivble' or 'Gone'.

code  - android:visibility="invisible"

Letter Spacing

Specing between character .

Must be a floating point value, such as "1.2".

method - android:letterSpacing="2"  range:"1 to depend on you"

Line Spacing

Spacing between two line

code - android:lineSpacingExtra="16dp"

Hint

Show hint for type of input

Method - android:hint="search_hint"

Hint Color

Set color for hint text

code - android:textColorHint="#ff6600"

Line

Makes the TextView be exactly this many lines tall.

Must be an integer value, such as "3".

Code - android:lines="2"

Font Family

Font family (named by string) for the text.

Must be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character.

code - android:fontFamily="cursive"

Gravity

Specifies how to align the text by the view's x- and/or y-axis when the text is smaller than the view.

Attribute are - top, bottom, left, right, centre, start, end

code - android:gravity="center"

Margin

Specifies extra space on the bottom side of this view. This space is outside this view's bounds. Margin values should be positive.

Must be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), mm (millimeters).

Code - android:layout_margin="46dp"

XML Attributes
Attribute Name	Related Method	Description
android:layout_marginBottom	setMargins(int,int,int,int)	Specifies extra space on the bottom side of this view.
android:layout_marginEnd	setMarginEnd(int)	Specifies extra space on the end side of this view.
android:layout_marginLeft	setMargins(int,int,int,int)	Specifies extra space on the left side of this view.
android:layout_marginRight	setMargins(int,int,int,int)	Specifies extra space on the right side of this view.
android:layout_marginStart	setMarginStart(int)	Specifies extra space on the start side of this view.
android:layout_marginTop	setMargins(int,int,int,int)	Specifies extra space on the top side of this view.

Padding

Sets the padding, in pixels, of all four edges. Padding is defined as space between the edges of the view and the view's content. A views size will include it's padding. If a background is provided, the padding will initially be set to that (0 if the drawable does not have padding). Explicitly setting a padding value will override the corresponding padding found in the background.

code - android:padding="16dp"

XML Attributes
Attribute Name	Related Method	Description
android:paddingBottom	setMargins(int,int,int,int)	Sets the padding, in pixels, of the bottom edge; see padding.
android:paddingEnd	setMarginEnd(int)	Sets the padding, in pixels, of the end edge; see padding.
android: paddingLeft	setMargins(int,int,int,int)	Sets the padding, in pixels, of the left edge; see padding.
android: paddingRight	setMargins(int,int,int,int)	Sets the padding, in pixels, of the right edge; see padding.
android: paddingStart	setMarginStart(int)	Sets the padding, in pixels, of the start edge; see padding.
android: paddingTop	setMargins(int,int,int,int)	Sets the padding, in pixels, of the top edge; see padding.

onClick

Name of the method in this View's context to invoke when the view is clicked. This name must correspond to a public method that takes exactly one parameter of type View. For instance, if you specify android:onClick="sayHello", you must declare a public void sayHello(View v)method of your context (typically, your Activity).

Must be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character.

code - android:onClick="method name"

rotation

rotation of the view, in degrees.

Must be a floating point value, such as "1.2".

code  - android:rotation="12"

Attribute - Description

android:rotationX - rotation of the view around the x axis, in degrees.

android:rotationY - rotation of the view around the y axis, in degrees.

Save Enabled

If false, no state will be saved for this view when it is being frozen. The default is true, allowing the view to be saved (however it also must have an ID assigned to it for its state to be saved). Setting this to false only disables the state for this view, not for its children which may still be saved.

Must be a boolean value, either "true" or "false".

code - android:saveEnabled="false"

Sound Effect Enabled

Boolean that controls whether a view should have sound effects enabled for events such as clicking and touching.

Must be a boolean value, either "true" or "false".

code - android:soundEffectsEnabled="true"

Tag

Supply a tag for this view containing a String, to be retrieved later with View.getTag() or searched for with View.findViewWithTag(). It is generally preferable to use IDs (through the android:id attribute) instead of tags because they are faster and allow for compile-time type checking.

Must be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character.

code  -  android:tag="tag name here"

ForeGround

Defines the drawable to draw over the content. This can be used as an overlay. The foreground drawable participates in the padding of the content if the gravity is set to fill.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb" or image

code - android:foreground="@drawable/abc"

foreGround Gravity

Defines the gravity to apply to the foreground drawable. The gravity defaults to fill.

Must be one or more (separated by '|') of the following constant values.

Constant	Value	Description
top	0x30	Push object to the top of its container, not changing its size.
bottom	0x50	Push object to the bottom of its container, not changing its size.
left	0x03	Push object to the left of its container, not changing its size.
right	0x05	Push object to the right of its container, not changing its size.
center_vertical	0x10	Place object in the vertical center of its container, not changing its size.
fill_vertical	0x70	Grow the vertical size of the object if needed so it completely fills its container.
center_horizontal	0x01	Place object in the horizontal center of its container, not changing its size.
fill_horizontal	0x07	Grow the horizontal size of the object if needed so it completely fills its container.
center	0x11	Place the object in the center of its container in both the vertical and horizontal axis, not changing its size.
fill	0x77	Grow the horizontal and vertical size of the object if needed so it completely fills its container.
clip_vertical	0x80	Additional option that can be set to have the top and/or bottom edges of the child clipped to its container's bounds. The clip will be based on the vertical gravity: a top gravity will clip the bottom edge, a bottom gravity will clip the top edge, and neither will clip both edges.
clip_horizontal	0x08	Additional option that can be set to have the left and/or right edges of the child clipped to its container's bounds. The clip will be based on the horizontal gravity: a left gravity will clip the right edge, a right gravity will clip the left edge, and neither will clip both edges.

foregroundTint

Tint to apply to the foreground. if your foreground is image then overwrite with tint color.

Must be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

android:foregroundTint="#12e7ff"

foregroundTintMode

Blending mode used to apply the foreground tint. awsm

Must be one of the following constant values.

Constant	Value	Description
src_over	3	The tint is drawn on top of the drawable. [Sa + (1 - Sa)Da, Rc = Sc + (1 - Sa)Dc]
src_in	5	The tint is masked by the alpha channel of the drawable. The drawable’s color channels are thrown out. [Sa * Da, Sc * Da]
src_atop	9	The tint is drawn above the drawable, but with the drawable’s alpha channel masking the result. [Da, Sc Da + (1 - Sa) * Dc]*
multiply	14	Multiplies the color and alpha channels of the drawable with those of the tint. [Sa * Da, Sc * Dc]
screen	15	[Sa + Da - Sa * Da, Sc + Dc - Sc * Dc]
add	16	Combines the tint and drawable color and alpha channels, clamping the result to valid color values. Saturate(S + D)

code -  android:foregroundTintMode="add"

inputType

The type of data being placed in a text field, used to help an input method decide how to let the user enter text. The constants here correspond to those defined by InputType. Generally you can select a single value, though some can be combined together as indicated. Setting this attribute to anything besides none also implies that the text is editable.

Must be one or more (separated by '|') of the following constant values.

Constant	Value	Description
none	0x00000000	There is no content type. The text is not editable.
text	0x00000001	Just plain old text. Corresponds to TYPE_CLASS_TEXT \| TYPE_TEXT_VARIATION_NORMAL.
textCapCharacters	0x00001001	Can be combined with text and its variations to request capitalization of all characters. Corresponds to TYPE_TEXT_FLAG_CAP_CHARACTERS.
textCapWords	0x00002001	Can be combined with text and its variations to request capitalization of the first character of every word. Corresponds to TYPE_TEXT_FLAG_CAP_WORDS.
textCapSentences	0x00004001	Can be combined with text and its variations to request capitalization of the first character of every sentence. Corresponds to TYPE_TEXT_FLAG_CAP_SENTENCES.
textAutoCorrect	0x00008001	Can be combined with text and its variations to request auto-correction of text being input. Corresponds to TYPE_TEXT_FLAG_AUTO_CORRECT.
textAutoComplete	0x00010001	Can be combined with text and its variations to specify that this field will be doing its own auto-completion and talking with the input method appropriately. Corresponds toTYPE_TEXT_FLAG_AUTO_COMPLETE.
textMultiLine	0x00020001	Can be combined with text and its variations to allow multiple lines of text in the field. If this flag is not set, the text field will be constrained to a single line. Corresponds toTYPE_TEXT_FLAG_MULTI_LINE.
textImeMultiLine	0x00040001	Can be combined with text and its variations to indicate that though the regular text view should not be multiple lines, the IME should provide multiple lines if it can. Corresponds toTYPE_TEXT_FLAG_IME_MULTI_LINE.
textNoSuggestions	0x00080001	Can be combined with text and its variations to indicate that the IME should not show any dictionary-based word suggestions. Corresponds to TYPE_TEXT_FLAG_NO_SUGGESTIONS.
textUri	0x00000011	Text that will be used as a URI. Corresponds to TYPE_CLASS_TEXT \| TYPE_TEXT_VARIATION_URI.
textEmailAddress	0x00000021	Text that will be used as an e-mail address. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_EMAIL_ADDRESS.
textEmailSubject	0x00000031	Text that is being supplied as the subject of an e-mail. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_EMAIL_SUBJECT.
textShortMessage	0x00000041	Text that is the content of a short message. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_SHORT_MESSAGE.
textLongMessage	0x00000051	Text that is the content of a long message. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_LONG_MESSAGE.
textPersonName	0x00000061	Text that is the name of a person. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_PERSON_NAME.
textPostalAddress	0x00000071	Text that is being supplied as a postal mailing address. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_POSTAL_ADDRESS.
textPassword	0x00000081	Text that is a password. Corresponds to TYPE_CLASS_TEXT \| TYPE_TEXT_VARIATION_PASSWORD.
textVisiblePassword	0x00000091	Text that is a password that should be visible. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_VISIBLE_PASSWORD.
textWebEditText	0x000000a1	Text that is being supplied as text in a web form. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_WEB_EDIT_TEXT.
textFilter	0x000000b1	Text that is filtering some other data. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_FILTER.
textPhonetic	0x000000c1	Text that is for phonetic pronunciation, such as a phonetic name field in a contact entry. Corresponds to TYPE_CLASS_TEXT \| TYPE_TEXT_VARIATION_PHONETIC.
textWebEmailAddress	0x000000d1	Text that will be used as an e-mail address on a web form. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS.
textWebPassword	0x000000e1	Text that will be used as a password on a web form. Corresponds to TYPE_CLASS_TEXT \|TYPE_TEXT_VARIATION_WEB_PASSWORD.
number	0x00000002	A numeric only field. Corresponds to TYPE_CLASS_NUMBER \| TYPE_NUMBER_VARIATION_NORMAL.
numberSigned	0x00001002	Can be combined with number and its other options to allow a signed number. Corresponds to TYPE_CLASS_NUMBER \| TYPE_NUMBER_FLAG_SIGNED.
numberDecimal	0x00002002	Can be combined with number and its other options to allow a decimal (fractional) number. Corresponds to TYPE_CLASS_NUMBER \| TYPE_NUMBER_FLAG_DECIMAL.
numberPassword	0x00000012	A numeric password field. Corresponds to TYPE_CLASS_NUMBER \|TYPE_NUMBER_VARIATION_PASSWORD.
phone	0x00000003	For entering a phone number. Corresponds to TYPE_CLASS_PHONE.
datetime	0x00000004	For entering a date and time. Corresponds to TYPE_CLASS_DATETIME \|TYPE_DATETIME_VARIATION_NORMAL.
date	0x00000014	For entering a date. Corresponds to TYPE_CLASS_DATETIME \| TYPE_DATETIME_VARIATION_DATE.
time	0x00000024	For entering a time. Corresponds to TYPE_CLASS_DATETIME \| TYPE_DATETIME_VARIATION_TIME.

//------------------------------- Scroll bar start here

ScrollIndicators

Defines which scroll indicators should be displayed when the view can be scrolled. Multiple values may be combined using logical OR, for example "top|bottom".

Must be one or more (separated by '|') of the following constant values.

Constant	Value	Description
none	0x00	No scroll indicators are displayed.
top	0x01	Displays top scroll indicator when view can be scrolled up.
bottom	0x02	Displays bottom scroll indicator when vew can be scrolled down.
left	0x04	Displays left scroll indicator when vew can be scrolled left.
right	0x08	Displays right scroll indicator when vew can be scrolled right.
start	0x10	Displays right scroll indicator when vew can be scrolled in the start direction.
end	0x20	Displays right scroll indicator when vew can be scrolled in the end direction.

code - android:scrollIndicators="bottom"

ScrollX

The initial horizontal scroll offset, in pixels.

code - android:scrollX="14sp"

ScrollY

The initial vertical scroll offset, in pixels.

code - android:scrollY="14sp"

scrollbarAlwaysDrawHorizontalTrack

Defines whether the horizontal scrollbar track should always be drawn.

Must be a boolean value, either "true" or "false".

android:scrollbarAlwaysDrawHorizontalTrack="true"

Below code for vertical

  android:scrollbarAlwaysDrawVerticalTrack="true"

scrollbarDefaultDelayBeforeFade

Defines the delay in milliseconds that a scrollbar waits before fade out.

Must be an integer value, such as "100".

code - android:scrollbarDefaultDelayBeforeFade="100"

scrollbarFadeDuration

Defines the delay in milliseconds that a scrollbar takes to fade out.

Must be an integer value, such as "100".

code - android:scrollbarFadeDuration="100"

scrollbarSize

Sets the width of vertical scrollbars and height of horizontal scrollbars.

code  - android:scrollbarSize="100dp"

scrollbarStyle

Controls the scrollbar style and position. The scrollbars can be overlaid or inset. When inset, they add to the padding of the view. And the scrollbars can be drawn inside the padding area or on the edge of the view. For example, if a view has a background drawable and you want to draw the scrollbars inside the padding specified by the drawable, you can use insideOverlay or insideInset. If you want them to appear at the edge of the view, ignoring the padding, then you can use outsideOverlay or outsideInset.

Must be one of the following constant values.

Constant	Value	Description
insideOverlay	0x0	Inside the padding and overlaid
insideInset	0x01000000	Inside the padding and inset
outsideOverlay	0x02000000	Edge of the view and overlaid
outsideInset	0x03000000	Edge of the view and inset

scrollbarThumbHorizontal

Defines the horizontal scrollbar thumb drawable.

android:scrollbarThumbHorizontal="@drawable/abc"

scrollbarThumbVertical

Defines the vertical scrollbar thumb drawable.

android:scrollbarThumbVertical="@drawable/abc"

scrollbarTrackHorizontal

Defines the horizontal scrollbar track drawable.

code - android:scrollbarTrackHorizontal="@drawable/abc"

scrollbarTrackVertical

Defines the vertical scrollbar track drawable.

code - android:scrollbarTrackVertical="@drawable/abc"

scrollbars

Defines which scrollbars should be displayed on scrolling or not.

Must be one or more (separated by '|') of the following constant values.

Constant	Value	Description
none	0x00000000	No scrollbar is displayed.
horizontal	0x00000100	Displays horizontal scrollbar only.
vertical	0x00000200	Displays vertical scrollbar only.

code - android:scrollbars="horizontal"

--------------------------------------

Java Code

XML PART

<TextView

    android:id="@+id/textview"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:hint="editText Demo"

    />

JAVA PART

public class MainActivity extends AppCompatActivity {



    TextView textView;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        textView =( TextView) findViewById(R.id.textView);  // edittext initialization

        

    }

}

getText()

Obtain text from textView and store it.

Runtime

String string = textView.getText().toString();

setText()

Set text to edittext .

Runtime

textView.setText(" Set this value to textView ");

Directly, parse value to editText

or

String string = " Set this value to textView ";

textView.getText(string);

Store the value to a string first and then set to textView.

selectAll

select all text of view

Place this code inside button.

code - textView.selectAll();

addTextChangeListner

It perform when change occur in edittext.

code - textView.addTextChangedListener(textWatcher);

this code listen any change in editText then TextWatcher perform task.

Final code -

activity_main.xml

<?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:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    android:orientation="vertical"

    tools:context="sichlearning.example.com.testone.MainActivity">



    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Hello World!"

        android:id="@+id/hello"

        />

    <EditText

        android:id="@+id/edittext"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="editText Demo"

        android:textColor="#ffffff"

        />



    <Button

        android:layout_width="200dp"

        android:layout_height="wrap_content"

        android:text="select all"

        android:onClick="select"

        />

</LinearLayout>

MainActivity.java

package sichlearning.example.com.testone;



import android.graphics.Color;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.support.v7.app.AppCompatDelegate;

import android.text.Editable;

import android.text.TextWatcher;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;



public class MainActivity extends AppCompatActivity {



    EditText editText;

    TextView textView;

    TextWatcher textWatcher;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        editText=(EditText) findViewById(R.id.edittext);

        textView=(TextView)findViewById(R.id.hello);







        textWatcher=new TextWatcher() {

            @Override

            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

                editText.setBackgroundColor(Color.DKGRAY);

        }



            @Override

            public void onTextChanged(CharSequence s, int start, int before, int count) {

                editText.setBackgroundColor(Color.parseColor("#12e7ff"));

            }



            @Override

            public void afterTextChanged(Editable s) {

             //   editText.setBackgroundColor(0xff0000ff);

                editText.setBackgroundColor(Color.RED);

            }

        };

        editText.addTextChangedListener(textWatcher);

    }



    public void select(View view)

    {



    }

}

setBackGroundColor

Change the color of edittext.

code - editText.setBackgroundColor(Color.DKGRAY);

editText.setBackgroundColor(Color.parseColor("#12e7ff"));

append

Add text or string to view or any character sequence.

Code - editText.append( string );

 example - editText.append("hello");

or

String hello="hello diva";

editText.append(hello);

append (CharSequence text, int start, int end)

add text in view with specified range ( start and end range )

code - editText.append(Char squence, int start,int end);

like - editText.append("hellodivakar",3,5);

this code only 'lo' to string

STYLING

add style

To add style to edittext, use

<EditText

    style="@style/FullWidthEditText"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:hint="Subject"/>

style in style.xml

We need to specify name of the style because we access style with name in editText.

<style name="FullWidthEditText" parent="Widget.AppCompat.EditText">

    <item name="android:padding">20dp</item>

    <item name="android:background">@null</item>

    <item name="android:textSize">@dimen/abc_text_size_subhead_material</item>

</style>

add style-shape

Add shape to editext.

Step 1. create a xml file (radiant_bachground.xml ) to drawable folder and place this code

radial_background.xml

<?xml version="1.0" encoding="UTF-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android">

<gradient

android:type="radial"

android:startColor="#343030"

android:endColor="#151515"

android:gradientRadius="300"

android:angle="270"

android:centerY="0.3"/>

</shape>

step -2. Add this code to your view ( edittext, textview, button or more ) to change background

android:background="@drawable/radial_background"

Text counter

activity_main.xml

<?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:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context="sichlearning.example.com.textcounter.MainActivity">



    <EditText

        android:id="@+id/editText1"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:background="#fff"

        android:layout_marginBottom="50dp"

        android:padding="30dp"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:maxLength="150"

        android:gravity="top|left"

        android:lineSpacingMultiplier="1.8"

        android:inputType="textMultiLine|textCapSentences" />

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginLeft="100dp"

        />



</RelativeLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {



    private TextView textView1;

    private EditText editText1;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        editText1=(EditText)findViewById(R.id.editText1);

        textView1=(TextView)findViewById(R.id.textView1);



        TextWatcher textWatcher=new TextWatcher() {

            @Override

            public void beforeTextChanged(CharSequence s, int start, int count, int after) {



            }



            @Override

            public void onTextChanged(CharSequence s, int start, int before, int count) {



            }



            @Override

            public void afterTextChanged(Editable s) {

                textView1.setText(150 - s.toString().length() + "/150");

            }

        };

        editText1.addTextChangedListener(textWatcher);

    }}

Dynamic View

activity_main.xml

<?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:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    android:orientation="vertical"

    tools:context=".MainActivity" >



    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="hello_world" />

    <RelativeLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content">

        <Button

            android:id="@+id/add"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_alignParentRight="true"

            android:text="Add"/>

        <EditText

            android:id="@+id/textin"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_alignParentLeft="true"

            android:layout_toLeftOf="@id/add"/>

    </RelativeLayout>

    <LinearLayout

        android:id="@+id/container"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="vertical">

    </LinearLayout>



</LinearLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {



    EditText textIn;

    Button buttonAdd;

    LinearLayout container;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        textIn = (EditText)findViewById(R.id.textin);

        buttonAdd = (Button)findViewById(R.id.add);

        container = (LinearLayout)findViewById(R.id.container);



        buttonAdd.setOnClickListener(new View.OnClickListener(){



            @Override

            public void onClick(View arg0) {

                LayoutInflater layoutInflater =

                        (LayoutInflater) getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

                final View addView = layoutInflater.inflate(R.layout.row, null);

                TextView textOut = (TextView)addView.findViewById(R.id.textout);

                textOut.setText(textIn.getText().toString());

                Button buttonRemove = (Button)addView.findViewById(R.id.remove);

                buttonRemove.setOnClickListener(new View.OnClickListener(){



                    @Override

                    public void onClick(View v) {

                        ((LinearLayout)addView.getParent()).removeView(addView);

                    }});



                container.addView(addView);

            }});



    }



}

row.xml

<?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="wrap_content">

    <Button

        android:id="@+id/remove"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentRight="true"

        android:text="Remove"/>

    <TextView

        android:id="@+id/textout"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_toLeftOf="@id/remove"/>

</RelativeLayout>

Android Note

Wednesday 17 August 2016

TextView

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