Question

我有一个片段类Frag2和一个视图类Rectangle，它将onDraw发送到另一个片段类Frag1，我需要从Rectangle向Frag 2发送一些数据{1}}。我该怎么办？：d

（对不起，我过去24小时都在尝试一切。）

Frag 2

public class FragmentTwo extends Fragment {

TextView changingText;
Button changeTextButton;

Button XButton;
Button YButton;

private int SecondX;

NumberPicker Pick100 = null;
private int entered;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {


    // TODO Auto-generated method stub
    View myInflatedView = inflater.inflate(R.layout.fragment_two_layout, container, false);


    changingText = (TextView) myInflatedView.findViewById(R.id.textView);
    changeTextButton = (Button) myInflatedView.findViewById(R.id.button);


    XButton = (Button) myInflatedView.findViewById(R.id.buttonX);
    YButton = (Button) myInflatedView.findViewById(R.id.buttonY);

    Pick100 = (NumberPicker) myInflatedView.findViewById(R.id.secondD);



    changeTextViewValueRandomlyOnButtonClick();
    return myInflatedView;
}


private void changeTextViewValueRandomlyOnButtonClick() {
    final String[] text = {"A", "B", "C", "D"};


    changeTextButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Random rand = new Random();
            int random = rand.nextInt(100) + 1;

            if (random == 100) changingText.setText(text[3]);
            if (random > 90 && random <= 99) changingText.setText(text[2]);
            if (random < 60 && random >= 1) changingText.setText(text[0]);
            if (random >= 60 && random <= 90) changingText.setText(text[1]);
        }

    });
}

你可以真正忽略其中的大部分内容。我试图将Pick100发送到这个班级

public class Rectangle extends View {
//FragmentTwo F2 = new FragmentTwo();


public Rectangle(Context context) {
    super(context);
}

public Rectangle(Context context, @Nullable AttributeSet attrs) {
    super(context, attrs);
}

public Rectangle(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    Log.d("X","RED DOT EUQALS TO "+x);


    Paint paint = new Paint();
    paint.setAntiAlias(true);
    paint.setColor(Color.RED);
    canvas.drawRect(x,100,x+60,100+60,paint);
}

}

矩形工作正常。它向Frag1发送一个矩形我只想在这里发送数字并将其放在x（int rectangle）中

Frag 1 class：

public class FragmentOne extends Fragment {
RelativeLayout relativeLayout;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    View myInflatedView= inflater.inflate(R.layout.fragment_one_layout,container,false);


    return myInflatedView;
}

}

Frag 1 xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:id="@+id/Frag1"
android:layout_height="match_parent"
android:background="#000">


<com.redot.puzzle1.Rectangle
    android:id="@+id/Rect"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />

Answer 1

我很确定你可以在Rectangle类中定义一个void setX(int x)。

在您放置矩形视图的任何片段中，您需要类似

的内容

// Make a field for this
rect = (Rectangle) myInflatedView.findViewById(R.id.Rect);

// Call your method whenever
rect.setX(x);

注意：看起来您正在尝试随机更改视图的大小并期望onDraw方法执行此更改。

如果您想使用Shapes等，我认为您应该使用a Canvas object

Answer 2

在Rectangle类public static int pick100Value = 0中创建一个静态字段，并在onDraw（）

中从pick100Value减去x

public class Rectangle extends View {
    public static int pick100Value = 0;

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        // ...
        canvas.drawRect(x - pick100Value , 100, (x - pick100Value)  + 60, 100 + 60, paint);
    }
}

在FragmentTwo中听取onValueChanged并设置Rectangle.pick100Value = newVal

public class FragmentTwo extends Fragment implements OnValueChangeListener {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {


        // TODO Auto-generated method stub
        View myInflatedView = inflater.inflate(R.layout.fragment_two_layout, container, false);


        changingText = (TextView) myInflatedView.findViewById(R.id.textView);
        changeTextButton = (Button) myInflatedView.findViewById(R.id.button);


        XButton = (Button) myInflatedView.findViewById(R.id.buttonX);
        YButton = (Button) myInflatedView.findViewById(R.id.buttonY);

        Pick100 = (NumberPicker) myInflatedView.findViewById(R.id.secondD);
        Pick100.setOnValueChangedListener(this);

        changeTextViewValueRandomlyOnButtonClick();
        return myInflatedView;
    }

    @Override
    public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
        Rectangle.pick100Value = newVal;
    }
}

如何将数据（int）从片段类发送到视图类

2 个答案: