如何更改其他活动的按钮背景? [英] How to change buttons background from another activity ?
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问题描述
我有3个带有几个按钮的XML布局文件(在res中)。我在视图寻呼机中使用xml布局进入我的应用程序中的主要活动...现在我想在条件为真时更改按钮背景,怎么做?
我的应用程序图像:
[ ^ ]
这是我在XML布局中的按钮:
i have 3 XML layout file (in res) with several buttons . i use xml layouts in view pager into main activity in my app ... now i want change buttons background when my condition is true , how do it ?
this my app image :
[^]
this my button in XML layout :
<ir.rahgoshafan.alphabetpuzzle.customs.PuzzleButton
android:id="@+id/btn_green455"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.33"
android:onClick="BTN_CLICK"
android:background="@drawable/button_red"
android:contentDescription="@string/app_name"
android:text="?????? ?????"
android:textColor="#fff"
android:textSize="20sp"
android:textStyle="bold" />
并在主要活动中查看寻呼机:
and view pager in main activity :
private void init() {
ViewPager VIEW_PAGER = (ViewPager) findViewById(R.id.tour_view_pager);
DOTS_LAYOUT = (LinearLayout) findViewById(R.id.tour_layout_dots);
LAYOUTS = new int[]{R.layout.items_one, R.layout.items_two, R.layout.items_three};
addBottomDots(0);
TourViewPagerAdapter ViewPagerAdapter = new TourViewPagerAdapter();
VIEW_PAGER.setAdapter(ViewPagerAdapter);
VIEW_PAGER.addOnPageChangeListener(viewPagerPageChangeListener);
}
我的尝试:
试试这个:
What I have tried:
in main activity try this :
final Button button = (Button) findViewById(R.id.btn_green455);
button.setBackgroundResource(R.layout.unlock_button);
但没有发生!
but no happen !
推荐答案
我试试这个:
i try this :
private void initViewPager() {
ViewPager VIEW_PAGER = (ViewPager) findViewById(R.id.viewPager);
LAYOUTS = new int[]{R.layout.fragment_one, R.layout.fragment_blank};
TourViewPagerAdapter ViewPagerAdapter = new TourViewPagerAdapter();
VIEW_PAGER.setAdapter(ViewPagerAdapter);
VIEW_PAGER.addOnPageChangeListener(viewPagerPageCh angeListener);
}
private class TourViewPagerAdapter extends PagerAdapter {
private LayoutInflater layoutInflater;
TourViewPagerAdapter() {
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
try {
layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(LAYOUTS[position], container, false);
Button btn_fragment = (Button)view.findViewById(R.id.btn_fragment);
// Button btn_fragment_two = (Button)view.findViewById(R.id.btn_fragment_next);
// btn_fragment.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
// Toast.makeText(getApplicationContext(), "show", Toast.LENGTH_SHORT).show();
// }
// });
// btn_fragment_two.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
// Toast.makeText(getApplicationContext(), "this show 2", Toast.LENGTH_SHORT).show();
// }
// });
container.addView(view);
return view;
} catch (Exception e) {
return null;
}
}
@Override
public int getCount() {
return LAYOUTS.length;
}
@Override
public boolean isViewFromObject(View view, Object obj) {
return view == obj;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
View view = (View) object;
container.removeView(view);
}
}
ViewPager.OnPageChangeListener viewPagerPageChangeListener = new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
};
但是当使用第一个片段(按钮)时,其他片段按钮会隐藏!!?
but when use first fragment (buttons) other fragment buttons be hide !!?
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