从约束布局类外部将视图膨胀到约束布局答案

【问题标题】：Inflating a view to a constraint layout from outside the constraint layouts class从约束布局类外部将视图膨胀到约束布局
【发布时间】：2018-11-08 11:36:09
【问题描述】：

我正在尝试将视图膨胀为约束布局。在活动中这不是问题。但我也希望能够从另一个名为getViews() 的类方法中调用它。如何访问约束布局以扩展视图？

public class chromecastUI_inflater {
    Button btn, btn1, fastforward, rewind, play, pause;
    TextView title, user, discription, date, streamviews, chromeconnection;
    ConstraintLayout constraintLayout1;
    Selector selector = new Selector();
    Context c;

    public chromecastUI_inflater() {

编辑

我也尝试通过公共构造函数添加布局：

    }

    public void getViews(View view) {

        play = view.findViewById(R.id.play);
        pause = view.findViewById(R.id.pause_button);
        fastforward = view.findViewById(R.id.fastforward_button);
        rewind = view.findViewById(R.id.rewind_button);
        btn1 = view.findViewById(R.id.cast_connection_button);
        btn = view.findViewById(R.id.cast_connection_button3);
        chromeconnection = view.findViewById(R.id.tvcast);

        //here is my problem layout

编辑

这里我试过添加

view.findViewById

        constraintLayout1 = findViewById(R.id.localplayerview);


        title = view.findViewById(R.id.title_text_view);
        discription = view.findViewById(R.id.discription_text_view);
        date = view.findViewById(R.id.date_text_view);
        streamviews = view.findViewById(R.id.views_text_view);
        user = view.findViewById(R.id.uploadedby_text_view);

        constraintLayout1.addView(view);
    }

    public void inflateViews() {
        LayoutInflater inflater = (LayoutInflater) c.getApplicationContext().getSystemService
                (Context.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.layout, null);
        getViews(view);
    }

    public void setUI() {

        title.setText(selector.DOCTITLE);
        discription.setText(selector.ABOUT);
        date.setText(selector.DATE);
        streamviews.setText(selector.VIEWS);
        user.setText(selector.USER);
    }

    public void resetUI() {

        title.setText("");
        discription.setText("");
        date.setText("");
        streamviews.setText("");
        user.setText("");
    }

    public void Chromecast_Connected() {
        chromeconnection.setText("Chromecast is connected");
        btn.setVisibility(View.VISIBLE);
        btn1.setVisibility(View.GONE);
    }

    public void Chromecast_Disconnected() {
        chromeconnection.setText("Chromecast is connected");
        btn.setVisibility(View.GONE);
        btn1.setVisibility(View.VISIBLE);
    }
}

这是我想从我的local_player 活动中调用方法的地方

chromecastUI_inflater chromecastUiInflater = new chromecastUI_inflater();

@Override
public void onChromecastConnecting() {
    Log.d(getClass().getSimpleName(), "onChromecastConnecting");
    chromecastUiInflater.inflateViews();
}

@Override
public void onChromecastConnected(ChromecastYouTubePlayerContext chromecastYouTubePlayerContext) {
    Log.d(getClass().getSimpleName(), "onChromecastConnected");
    chromecastUiInflater.setUI();
    chromecastUiInflater.Chromecast_Connected();
    initializeCastPlayer(chromecastYouTubePlayerContext);
}

我习惯于从活动内部夸大视图。

【问题讨论】：

标签： java android view layout-inflater

【解决方案1】：

这就是我修复它的方法。我必须在我的膨胀视图方法中创建一个名为根视图的视图。然后从我的活动中调用 rootview 作为约束布局。

 public void inflateViews(View rootview,Context c){
    constraintLayout1 = rootview.findViewById(R.id.localplayerview);
    LayoutInflater inflater = (LayoutInflater)c.getSystemService
            (Context.LAYOUT_INFLATER_SERVICE);
     view = inflater.inflate(R.layout.layout,null);
    getViews(view);

}

然后我必须创建一个 getStrings 方法来从膨胀的视图中填充我的文本视图

public void getStrings_fromLocalPlayer(String title,String synopsis, String user, String views, String date){
    doctitle = title;
    docsynopsis = synopsis;
    docuser = user;
    docviews = views;
    docdate = date;
}

【讨论】：