[英]How to change image when checkbox checked
我在我的服務中調用了此浮動圖像
MyService.java
back = new ImageView(this);
back.setBackgroundResource(R.drawable.quick_launch_pressed_pink);
back.setImageResource(R.drawable.back);
我想通過在另一個類上調用MyService來更改ImageResource,但我的應用程序已關閉。 這是我在MainActivity.java上的代碼
public void addListenerOnCb() {
chb = (CheckBox) findViewById(R.id.cb);
final MyService ms = new MyService();
chb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//is chkIos checked?
if (((CheckBox) v).isChecked()) {
ms.back.setImageResource(R.drawable.home);
}
}
});
}
在可繪制文件夾中添加兩個不同的圖像,以供選中和未選中圖像創建xml文件checkbox_selected.xml
checkbox_selected.xml
<?xml version="1.0" encoding="utf-8"?>
<selector
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="@drawable/remember_me_selected" />
<item android:state_selected="true" android:drawable="@drawable/remember_me_selected" />
<item android:state_activated="true" android:drawable="@drawable/remember_me_selected" />
<item android:drawable="@drawable/remember_me" />
</selector>
網址xml代碼中的ImageView
<ImageView
android:id="@+id/remember_checkbox_img"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="0.3"
android:clickable="true"
android:src="@drawable/checkbox_selected" />
將此用於CheckBox
checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if(b)
{
// do something
}
else
{
// do another something
}
}
});
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