I want to make a re-usable Listview control from listView in which the columns can be controlled , Say I want to load 3 column list view and sometimes 2 and sometimes 4 .
How can I Control the columns and rows pro-grammatically for a list view.Depending upon my json values I will display the list.
Also I want to make some column editable also .This also needs to be controlled by code level
This is my code which I started :
import android.content.Context;
import android.graphics.Color;
import android.graphics.PorterDuff;
import org.json.JSONArray;
import org.json.JSONObject;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class LayoutAdvancedList extends ListView {
private String m_name;
private int m_editMask = 0;
private int m_EditedRowIndex = 0;
private int m_EditedFieldIndex = 0;
public String getName() {
return m_name;
}
public void setName(String name) {
this.m_name = name;
}
public void setMaxLength(final int maxLength) {
if (maxLength > 0) {
// super.setFilters(new InputFilter[]{new InputFilter.LengthFilter(maxLength)});
} else {
// super.setFilters(new InputFilter[]{});
}
}
public void setReadOnly(final boolean readOnly) {
super.setFocusable(!readOnly);
super.setFocusableInTouchMode(!readOnly);
super.setClickable(!readOnly);
super.setLongClickable(!readOnly);
// super.setCursorVisible(!readOnly);
}
public LayoutAdvancedList(Context context) {
super(context);
LayoutInitialize(context);
}
public LayoutAdvancedList(Context context, AttributeSet attrs) {
super(context, attrs);
LayoutInitialize(context);
}
public LayoutAdvancedList(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
LayoutInitialize(context);
}
#Override
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
if (enabled) {
this.getBackground().setColorFilter(null);
} else {
this.getBackground().setColorFilter(Color.GRAY, PorterDuff.Mode.MULTIPLY);
}
}
If you have the choice, you should use a RecyclerView for this with a GridLayoutManager so you can choose the number of columns on the fly:
recyclerView.setLayoutManager(new GridLayoutManager(this, numberOfColumns));
Here's an example of how to make a RecyclerView
Presumably each item in your ListView is defined by child views arranged to make up 2-4 columns in each row, depending on your requirement. Simply control the presence/absence of each column programmatically using view.setVisibility(View.GONE), view.setVisibility(View.VISIBLE) or view.setVisibility(View.INVISIBLE)
Related
I have created a real time firebase database whose one of the child is "availability". While populating all the firebase data in listview, I want the text from the child to be coloured in Green if the string value of "availability" is "yes" else in Red.
Is it possible? If yes, please show me the way.
(I have populate the child in various activities, it will be really helpful if I could state the condition universally)
Thank You.
yes possible use below class
You have to create custom Textview like this
import android.content.Context;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.widget.TextView;
public class CustomTextViewTest extends android.support.v7.widget.AppCompatTextView {
public CustomTextViewTest(Context context) {
super(context);
}
public CustomTextViewTest(Context context, #Nullable AttributeSet attrs) {
super(context, attrs);
}
public CustomTextViewTest(Context context, #Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public void setText(CharSequence text, BufferType type) {
super.setText(text, type);
// here set color according to text
if (text.toString().contains("availability")) {
this.setTextColor(Your Color);
} else {
this.setTextColor(Your Color);
}
}
}
I followed the whole procedure from the Developer page, except that I used androidx new tools in order to support gif insertion - doc here: https://developer.android.com/guide/topics/text/image-keyboard
import android.content.Context;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.Log;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputConnection;
import android.widget.EditText;
import androidx.core.os.BuildCompat;
import androidx.core.view.inputmethod.EditorInfoCompat;
import androidx.core.view.inputmethod.InputConnectionCompat;
import androidx.core.view.inputmethod.InputContentInfoCompat;
public class CoolEditText extends EditText {
public CoolEditText(Context context) {
super(context);
}
public CoolEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CoolEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public InputConnection onCreateInputConnection(EditorInfo editorInfo) {
final InputConnection ic = super.onCreateInputConnection(editorInfo);
EditorInfoCompat.setContentMimeTypes(editorInfo,
new String[]{"image/gif"});
Log.e("CVE","onCreateInputConnection");
final InputConnectionCompat.OnCommitContentListener callback =
new InputConnectionCompat.OnCommitContentListener() {
#Override
public boolean onCommitContent(InputContentInfoCompat inputContentInfo,
int flags, Bundle opts) {
Log.e("CVE","onCommitContent");
// read and display inputContentInfo asynchronously
if (BuildCompat.isAtLeastNMR1() && (flags &
InputConnectionCompat.INPUT_CONTENT_GRANT_READ_URI_PERMISSION) != 0) {
try {
inputContentInfo.requestPermission();
} catch (Exception e) {
return false; // return false if failed
}
}
return true; // return true if succeeded
}
};
return InputConnectionCompat.createWrapper(ic, editorInfo, callback);
}
}
Unfortunately, I keep getting "this app doesn't support gif insertion message" while I try to use GBoard
Any idea what might be wrong? The code is quite simple and I don't see where the mistake could be...
Note: as you can see in code, I logged "onCreateInputConnection" and that is fired, but "onCommitContent" is never called
I don't know if you found your response, but I had the same problem.
I success by creating the new CoolEditText programmatically.
I hope it will help someone.
#Robert :
coolInputText = new CoolInputText(context);
this.addView(coolInputText);
Recently I've been trying to create a CustomView.
I am following the tutorial and did as directed but when i tried to run the code my CustomView was not displayed on my android screen.
My code for attrs.xml is:-
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="TimeView">
<attr name="text" format="string"/>
<attr name="setColor" format="boolean"/>
</declare-styleable>
</resources>
Here is the code for my CustomView i.e TimeView.java:-
package com.example.custom;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.util.AttributeSet;
import android.widget.TextView;
public class TimeView
extends TextView{
public String titleText;
public boolean color;
public TimeView(Context context) {
super(context);
setTimeView();
// TODO Auto-generated constructor stub
}
public TimeView(Context c,AttributeSet as)
{
super(c,as);
TypedArray ty=c.obtainStyledAttributes(as,R.styleable.TimeView);
int count=ty.getIndexCount();
try{
for(int i=0;i<count;i++)
{
int attr=ty.getIndex(i);
if(attr==R.styleable.TimeView_text)
{
titleText=ty.getString(attr);
}
else if(attr==R.styleable.TimeView_setColor)
{
color=ty.getBoolean(attr, false);
decorate();
}
}
}
finally
{
ty.recycle();
}
}
public TimeView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setTimeView();
}
public void setTimeView()
{
SimpleDateFormat sdf=new SimpleDateFormat("hh.mm aa");
String time=sdf.format(Calendar.getInstance().getTime());
if(this.titleText!=null)
{
setText(this.titleText+" "+time);
}
else
setText(time);
}
public void decorate()
{
if(this.color==true)
{
setShadowLayer(4, 2, 2, Color.rgb(250, 00, 250));
setBackgroundColor(Color.CYAN);
}
else{
setBackgroundColor(Color.RED);
}
}
}
and lastly here is the code for my activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:custom="http://schemas.android.com/apk/res/com.example.custom"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.custom.MainActivity" >
<com.example.custom.TimeView
android:id="#+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="40sp"
custom:text="My View"
custom:setColor="true"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
</LinearLayout>
I am getting this result:-
I don't know where i am doing mistake.
Please help me!
Thank you in advance.
Just overwrite your code with my code it's working. You just make mistake while retrieving attributes.
Don't forget to add your package name at first line
import java.text.SimpleDateFormat;
import java.util.Calendar;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.util.AttributeSet;
import android.widget.TextView;
public class TimeView
extends TextView {
public String titleText;
public boolean color;
public TimeView(Context context) {
super(context);
setTimeView(context, null);
}
public TimeView(Context c, AttributeSet as) {
super(c, as);
setTimeView(c, as);
}
public TimeView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setTimeView(context, attrs);
}
public void setTimeView(Context c, AttributeSet attrs) {
TypedArray a;
if (attrs != null) {
a = c.getTheme().obtainStyledAttributes(
attrs,
R.styleable.BLProgress,
0, 0);
} else {
throw new IllegalArgumentException("Must have to pass the attributes");
}
try {
titleText = a.getString(R.styleable.TimeView_text);
color = a.getBoolean(R.styleable.TimeView_setColor, false);
} finally {
a.recycle();
}
SimpleDateFormat sdf = new SimpleDateFormat("hh.mm aa");
String time = sdf.format(Calendar.getInstance().getTime());
if (this.titleText != null) {
setText(this.titleText + " " + time);
} else
setText(time);
decorate();
}
public void decorate() {
if (color) {
setShadowLayer(4, 2, 2, Color.rgb(250, 00, 250));
setBackgroundColor(Color.CYAN);
} else {
setBackgroundColor(Color.RED);
}
}
}
here is the screen shot ..
I have this extension of SeekBar:
package com.simplemathgame;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
public class SeekBarPlus extends SeekBar implements OnSeekBarChangeListener{
private TextView numberOfDrills;
public SeekBarPlus(Context context) {
super(context);
}
public SeekBarPlus(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SeekBarPlus(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
Log.w("SeekBarChanged", "change to" + progress);
numberOfDrills.setText(String.valueOf(progress));
}
public void setTextView(TextView textView){
numberOfDrills = textView;
Log.w("SeekBar", "text to bar");
}
}
And here is the main activity code:
package com.simplemathgame;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import com.simplemathgame.SeekBarPlus;
public class MainActivity extends Activity{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SeekBarPlus addSeekBar = (SeekBarPlus) findViewById(R.id.add_seek_bar);
SeekBarPlus subSeekBar = (SeekBarPlus) findViewById(R.id.sub_seek_bar);
SeekBarPlus mulSeekBar = (SeekBarPlus) findViewById(R.id.mul_seek_bar);
SeekBarPlus divSeekBar = (SeekBarPlus) findViewById(R.id.div_seek_bar);
TextView numberOfAddDrills = (TextView) findViewById(R.id.add_drills_number);
TextView numberOfSubDrills = (TextView) findViewById(R.id.sub_drills_number);
TextView numberOfMulDrills = (TextView) findViewById(R.id.mul_drills_number);
TextView numberOfDivDrills = (TextView) findViewById(R.id.div_drills_number);
addSeekBar.setTextView(numberOfAddDrills);
subSeekBar.setTextView(numberOfSubDrills);
mulSeekBar.setTextView(numberOfMulDrills);
divSeekBar.setTextView(numberOfDivDrills);
}
}
After I move the progress bar nothing happens, I have all the needed elements (TextViews).
I would like:
I would like the SeekBarPlus Automatically listen to it's changes and react as I have coded in the onProgressChanged method,in other words I would like that onProgressChanged would be triggered without any code in the main activity.
Screenshot
After reading the documentation:
Clients of the SeekBar can attach a SeekBar.OnSeekBarChangeListener to
be notified of the user's actions.
You need to have a listener on your Seekbar in order to update.
Update
This is possible, but you have to create a single view to house everything and then attach it it that way. Once you have created this, then add the custom view to your layout file. Then add callbacks as necessary from your custom view. Of course this implies that you added your listeners IN your custom view class.
Example
You would have something like this in your class, make sure to set the orientation of the views:
package com.blah.my.package
class MyCustomClass extends LinearLayout{
CustomSeekbar v1 ...
CustomSeekbar v2 ...
CustomSeekbar v3 ...
CustomSeekbar v4 ...
CustomSeekbar v5 ...
CustomSeekbar v6 ...
...
Constructors and methods n' stuff...
}
Once you have this, then in your layout 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">
<com.blah.my.package.MyCustomClass ... />
...
<LinearLayout>
To learn more:
http://developer.android.com/training/custom-views/index.html
The easiest way is to implement OnSeekBarChangeListener directly on your extended class:
public class SeekBarPlus extends SeekBar implements OnSeekBarChangeListener{
public SeekBarPlus(Context context) {
super(context);
setOnSeekBarChangeListener(this);
}
public SeekBarPlus(Context context, AttributeSet attrs) {
super(context, attrs);
setOnSeekBarChangeListener(this);
}
public SeekBarPlus(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setOnSeekBarChangeListener(this);
}
....
}
Otherwise none of the on* methods will get called. Note: this really should be a composite widget and you shouldn't need to be passing in the TextView.
You also need to do what Sergio suggested and not use the int value directly: numberOfDrills.setText("" + progress);
That's because you're sending an int to setText(), so it doesn't work because it expects a String. Change the line to:
numberOfDrills.setText("" + progress);
Or:
numberOfDrills.setText(String.valueOf(progress));
You may want to change this 4 lines too in your MainActivity, you are setting 4 TextViews to the same seekbar:
/*addSeekBar.setTextView(numberOfAddDrills);
addSeekBar.setTextView(numberOfSubDrills);
addSeekBar.setTextView(numberOfMulDrills);
addSeekBar.setTextView(numberOfDivDrills);*/
addSeekBar.setTextView(numberOfAddDrills);
subSeekBar.setTextView(numberOfSubDrills);
mulSeekBar.setTextView(numberOfMulDrills);
divSeekBar.setTextView(numberOfDivDrills);
Inspired by how-do-i-display-the-current-value-of-an-android-preference-in-the-preference-summary i created my own EditTextPreference that shows its current value in the PreferenceScreen.
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen android:key="preferences" xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory
android:title="First Category"
android:key="first_category">
<de.k3b.widgets.EditTextPreferenceWithSummary
android:key="test"
android:title="Test Message"
android:dialogTitle="Test Message"
android:dialogMessage="Provide a message"
android:defaultValue="Default welcome message" />
</PreferenceCategory>
</PreferenceScreen>
The implementation looks like this
package de.k3b.widgets;
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.*;
import android.util.AttributeSet;
import android.util.Log;
public class EditTextPreferenceWithSummary extends EditTextPreference {
private final static String TAG = EditTextPreferenceWithSummary.class.getName();
public EditTextPreferenceWithSummary(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public EditTextPreferenceWithSummary(Context context) {
super(context);
init();
}
private void init() {
Log.e(TAG, "init");
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.getContext());
String currentText = test prefs.getString("minTrashholdInSecs", this.getText());
// where do i get the current value of the underlaying EditTextPreference ??
// vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
this.setSummary(this.getText());
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
#Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
Log.w(TAG, "display score changed to "+newValue);
preference.setSummary(newValue.toString()); // getSummary());
return true;
}
});
}
}
When the PreferenceScreen is first shown there is no current value displayed.
My problem: Where do i get the current value that the EditTextPreference represents?
getText() does not get the value as i expected.
After changing the preferencevalue this value is shown in the summary field as expected.
Im am using android 2.2
Try to add the following code to your EditTextPreferenceWithSummary class:
#Override
protected View onCreateView(ViewGroup parent) {
this.setSummary(this.getText());
return super.onCreateView(parent);
}
As for me, it works.
I think the problem was that you were trying to change the UI state out of UI thread (in fact in the constructor).
Here is a more complete example, that includes when the value updates, without having to install preference listeners.
import android.content.Context;
import android.preference.EditTextPreference;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
public class EditTextPreferenceWithValueSummary extends EditTextPreference{
public EditTextPreferenceWithValueSummary(Context context) {
super(context);
}
public EditTextPreferenceWithValueSummary(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
protected View onCreateView(ViewGroup parent) {
this.setSummary(this.getText());
return super.onCreateView(parent);
}
#Override
protected void onDialogClosed(boolean positiveResult) {
super.onDialogClosed(positiveResult);
if (positiveResult) {
this.setSummary(getText());
}
}
}
And in your xml/settings.xml:
<your.package.views.EditTextPreferenceWithValueSummary
android:key="some_preference_key"
android:title="Some Title" />