Pulsante - Cambia il colore di sfondo sul clic
https://stackoverflow.com//questions/22044788
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21-12-2019 - |
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Ho 8 pulsanti nella mia attività. Quello che sto cercando è, i pulsanti hanno uno sfondo predefinito e quando si fa clic su un pulsante, il colore di sfondo dovrebbe passare ad un altro colore. Questa parte è piuttosto semplice. Ma quando faccio clic su qualsiasi altro pulsante, il colore di sfondo del primo pulsante deve tornare al colore predefinito. Capisco che questo sarà fatto usando "stati di selezione", ma non sono abbastanza sicuro di come implementarlo. Più ne ho letto, più sono confuso.
In questo momento, l'XML che ho è il seguente: in cartella disegnabile
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/blue" android:state_pressed="true"/>
<item android:drawable="@color/dark_grey" android:state_focused="true"/>
<item android:drawable="@drawable/image_border"/>
</selector>
Il dragable / image_border nell'XML viene utilizzato per definire la forma per il pulsante. Di seguito è riportato il image_border.xml
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="@color/dark_grey" />
<stroke
android:width="4dp"
android:color="@color/light_grey" />
<padding
android:bottom="1dp"
android:left="1dp"
android:right="1dp"
android:top="1dp" />
</shape>
Qualcuno può aiutarmi con come cambiare l'XML per comportarsi nel modo in cui ho bisogno che sia?
[Modifica 1]
Tutte le risposte inferiori stanno puntando verso un tipo simile di soluzione. Ecco i cambiamenti che ho fatto. Ma, ancora, quando premo il pulsante, si rivolge al colore specificato ma si rivolge immediatamente al colore predefinito.
button_background_blue.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/image_border_blue" android:state_pressed="true"/>
<item android:drawable="@color/dark_grey" android:state_focused="true"/>
<item android:drawable="@drawable/image_border"/>
</selector>
image_border_blue.xml
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="@color/blue" />
<stroke
android:width="4dp"
android:color="@color/blue" />
<padding
android:bottom="1dp"
android:left="1dp"
android:right="1dp"
android:top="1dp" />
</shape>
Qualche idea?
Soluzione
Crea una forma denominata button_pressed.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@color/blue" />
<stroke
android:width="4dp"
android:color="@color/blue" />
<padding
android:bottom="1dp"
android:left="1dp"
android:right="1dp"
android:top="1dp" />
</shape>
Supponiamo, hai due pulsanti i cui ID sono R.id.btn e R.id.btn1
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="12dp"
android:background="@drawable/button_pressed"
android:onClick="onClick"
android:text="Press Me 1" />
<Button
android:id="@+id/btn2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="12dp"
android:background="@drawable/button_pressed"
android:onClick="onClick"
android:text="Press Me 2" />
</LinearLayout>
Scrivi il metodo onClick() che ti consentirà di conservare il colore modificato fino a premere un altro pulsante.
Button button;
public void onClick(View v) {
Drawable dr = getResources().getDrawable(R.drawable.button_pressed);
dr.setColorFilter(Color.parseColor("#FF0000"), PorterDuff.Mode.SRC_ATOP);
switch (v.getId()) {
case R.id.btn:
if (button == null) {
button = (Button) findViewById(v.getId());
} else {
button.setBackgroundResource(R.drawable.button_pressed);
button = (Button) findViewById(v.getId());
}
button.setBackgroundDrawable(dr);
break;
case R.id.btn2:
if (button == null) {
button = (Button) findViewById(v.getId());
} else {
button.setBackgroundResource(R.drawable.button_pressed);
button = (Button) findViewById(v.getId());
}
button.setBackgroundDrawable(dr);
break;
default:
break;
}
}
Penso, ora otterrai ciò che volevi fare.
Altri suggerimenti
Utilizzare questo selettore e mettilo in cartella disegnabile e impostare il pulsante di sfondo su questo selettore.
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/blue" android:state_pressed="true"/>
<item android:drawable="@color/AliceBlue" android:state_focused="true"/>
<item android:drawable="@color/Azure"/>
</selector>
Ti suggerisco questo selettore.
Basta creare un semplice file Selector.xml in una cartella Diseggibile e quindi aggiungere il selettore al pulsante come android:background="@drawable/selector" o codice come questo: yourButton.setBackground(getResources().getDrawable(R.drawable.selector));
selector.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="true"
android:state_pressed="true" android:drawable="@android:color/holo_blue_light" />
<item android:state_enabled="true"
android:state_focused="true" android:drawable="@android:color/holo_green_dark" />
<item android:state_enabled="true"
android:state_selected="true" android:drawable="@android:color/holo_purple" />
<item
android:drawable="@drawable/yourdrawable" />
</selector>
Il primo elemento è per pressed, il secondo per focused e l'ultimo è per lo stato selected.
changing background color in layout when respective color button is clicked in android
main_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#b056ff"
android:id="@+id/l1">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/b1"
android:layout_gravity="center"
android:text="RED"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/b2"
android:layout_gravity="center"
android:text="GREEN" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/b3"
android:layout_gravity="center"
android:text="BLUE"/>
MyActivity.java
package ram.android.com.cwp1;
import android.app.Activity;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;
/**
* Created by VENKATESH on 10-Jun-16.
*/
public class MyActivity extends Activity implements View.OnClickListener {
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
Button r, g, b;
LinearLayout ll;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
ll = (LinearLayout) findViewById(R.id.l1);
r = (Button) findViewById(R.id.b1);
g = (Button) findViewById(R.id.b2);
b = (Button) findViewById(R.id.b3);
r.setOnClickListener(this);
g.setOnClickListener(this);
b.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.b1:
ll.setBackgroundColor(Color.RED);
break;
case R.id.b2:
ll.setBackgroundColor(Color.GREEN);
break;
case R.id.b3:
ll.setBackgroundColor(Color.BLUE);
break;
}
}
}
I know it is very late but I hope some one would find useful. I have very simple solution, I have used in my app and works awesome.
Let me explain the logic, 1. Keep track of 2 button clicks - previous button clicked and current button clicked. I am using ArrayList 2. for every button click keep updating the previous and current button clicks value in ArrayList. 3. change the background color of previous button clicked. 4. change the background color of current button clicked.
I hope the logic is simple and straightforward.
Here is the implementation
xml
<Button
android:onClick="onClickRosterDay"
android:text="Mon"
android:textColor="@color/textColorWhite"
android:background="@color/colorAccent"
android:id="@+id/rosterMonday"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
the OnClick method is defined for every button in XML, in the example it is onClickRosterDay
Java
//buttons
Button rosterMonday;
Button rosterTuesday;
Button rosterWednesday;
Button rosterThursday;
Button rosterFriday;
Button rosterSaturday;
//ArrayList to track button clicks
private ArrayList<Button> buttonClickedDay;
in OnCreate
buttonClickedDay = new ArrayList<>();
// to start with these are the default clicks.
buttonClickedDay.add(rosterMonday ); //previous button clicked
buttonClickedDay.add(rosterMonday ); // current button clicked
public void onClickRosterDay(View v) {
switch (v.getId()){
case R.id.rosterMonday:
daySelected = "MONDAY";
// move current click button to previous button clicked position
buttonClickedDay.set(0, buttonClickedDay.get(1));
// update current clicked position
buttonClickedDay.set(1,rosterMonday);
break;
case R.id.rosterTuesday:
daySelected = "TUESDAY";
buttonClickedDay.set(0, buttonClickedDay.get(1));
buttonClickedDay.set(1,rosterTuesday);
break;
case R.id.rosterWednesday:
daySelected = "WEDNESDAY";
buttonClickedDay.set(0, buttonClickedDay.get(1));
buttonClickedDay.set(1,rosterWednesday);
break;
case R.id.rosterThursday:
daySelected = "THURSDAY";
buttonClickedDay.set(0, buttonClickedDay.get(1));
buttonClickedDay.set(1,rosterThursday);
break;
case R.id.rosterFriday:
daySelected = "FRIDAY";
buttonClickedDay.set(0, buttonClickedDay.get(1));
buttonClickedDay.set(1,rosterFriday);
break;
case R.id.rosterSaturday:
daySelected = "SATURDAY";
buttonClickedDay.set(0, buttonClickedDay.get(1));
buttonClickedDay.set(1,rosterSaturday);
break;
}
if(buttonClickedDay.get(0) != buttonClickedDay.get(1)) {
// update background color of previous button clicked
buttonClickedDay.get(0).setBackgroundColor(this.getResources().getColor(R.color.colorAccent));
// update background color of current button clicked
buttonClickedDay.get(1).setBackgroundColor(this.getResources().getColor(R.color.textBackgroundGreen));
}
}
