如何在 ListView 中单击时更改 TextView 背景颜色？

Question

I want to change the background of a textview when click every items. I do not have TextView on the XML file. I added text by array adapter. I have search the internet for solutions and look at most of all the solution on stackoverflow, still no solution.

 @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_genel);



    final VideoView videoview = findViewById(R.id.Videogenel);
    listView = (ListView) findViewById(R.id.lgvideo);
    videoList= new ArrayList<>();
    videoList.add("1: Genel Bilgiler");



    ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,R.layout.support_simple_spinner_dropdown_item,videoList);
    listView.setAdapter(adapter);




    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            switch (position){
                case 0:
                    videoview.setVideoPath("/storage/A6D3-E544/videos/genel1.mp4");
                    break;
            }
            final MediaController mediacontroller = new MediaController(Genel.this);
            mediacontroller.setAnchorView(videoview);

            videoview.setMediaController(mediacontroller);
            videoview.requestFocus();
            videoview.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mp) {
                    mp.setOnVideoSizeChangedListener(new MediaPlayer.OnVideoSizeChangedListener() {
                        @Override
                        public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
                            videoview.setMediaController(mediacontroller);
                            mediacontroller.setAnchorView(videoview);
                        }
                    });
                }
            });

            videoview.setOnErrorListener(new MediaPlayer.OnErrorListener() {
                @Override
                public boolean onError(MediaPlayer mp, int what, int extra) {
                    Log.d("API123", "What " + what + " extra " + extra);
                    return false;
                }
            });

            videoview.setMediaController(mediaController);
            videoview.start();

        }
     });

   }

Answer 1

Try by adding an onItemClickListner on the listview and if it does not work then I don't think this is possible with the default ArrayAdapter class. so create your own adapter class and extend it with the BaseAdapter or ArrayAdapter you can search for examples. then you can change Item's background by adding an onItemClickListner on your ListView.

Answer 2

我认为你应该让自己的CustomAdapter ，然后你可以设置onClickListener为您的TextView这个适配器或内部onItemClickListner您的ListView， 喜欢这里。

Answer 3

Try this: Create a selector color file res/color/selector_txt.xml:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true" android:color="@color/color1"/>
    <item android:state_pressed="true" android:state_enabled="false" android:color="@color/color2" />
    <item android:state_enabled="false" android:color="@color/color3" />
    <item android:color="@color/color4"/>
 </selector>

Create new layout file: list_item.xml.

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" 
android:background="@color/selector_txt"
android:textSize="15sp"
/>

Then replace the layout of array adapter.

ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,R.layout.list_item,videoList);