Question

我从服务中获得一个布尔值，如果正在播放一首歌曲，则返回true。

发生方向更改后，我在onResume（）中调用updateSongInfo（）。

这些日志返回服务类中的所有值。

Log.d(TAG, "songIndex: " + songIndex);
Log.d(TAG,"songList: " + songList);
Log.d(TAG,"isPlaying: " + isPlaying);

当我更改方向时，

isPlaying 在logcat中返回true。

但是由于某种原因，当我更改方向时未调用此 if else语句，它仅在将应用程序置于前台并再次打开时才提供正确的按钮。

但是如何在方向改变时获得正确的图像？

这不会在方向更改上调用

if (isPlaying){
          mBtnPlayPause.setImageResource(R.drawable.ic_action_pause_white);
          Log.d(TAG,"value test: " + isPlaying);
}else{
          mBtnPlayPause.setImageResource(R.drawable.ic_action_play);
          Log.d(TAG,"value test: " + isPlaying);
}

updateSongInfo（）中的代码

private void updateSongInfo(){
    if (Main.getInstance().mServiceIsBound) {
        if (songList != null && !songList.isEmpty()) {
            if (mSlideUpPanel.getPanelState() == SlidingUpPanelLayout.PanelState.HIDDEN){
                mSlideUpPanel.setPanelState(SlidingUpPanelLayout.PanelState.EXPANDED);
            }
            songList = Main.getInstance().mediaPlayerService.getSongList();
            songIndex = Main.getInstance().mediaPlayerService.getSongIndex();
            isPlaying = Main.getInstance().mediaPlayerService.mpIsPlaying();

            Log.d(TAG, "songIndex: " + songIndex);
            Log.d(TAG,"songList: " + songList);
            Log.d(TAG,"isPlaying: " + isPlaying);

            tvSongTitle.setText(songList.get(songIndex).getTitle());
            tvArtistName.setText(songList.get(songIndex).getArtist());
            tvAlbumName.setText(songList.get(songIndex).getAlbum());

            String songListSize = (songIndex + 1) + "/" + songList.size();
            tvSongListSize.setText(songListSize);

            loadAlbumArt();
            loadAlbumArtBottom();
            startAnimation();

            updateProgressBar();

            if (isPlaying){
                mBtnPlayPause.setImageResource(R.drawable.ic_action_pause_white);
                Log.d(TAG,"value test: " + isPlaying);
            }else{
                mBtnPlayPause.setImageResource(R.drawable.ic_action_play);
                Log.d(TAG,"value test: " + isPlaying);
            }

        }
 }

方向更改后，图像按钮状态不正确

0 个答案: