android 中的每次点击更改动态文本视图中的颜色

Question

我在 android 中动态创建了一个文本视图。当我单击文本视图时，颜色从白色变为橙色，但我想要的是当我单击另一个文本视图时，另一个已更改为橙色的文本视图将变回白色。这是创建文本视图的代码：

for (int i = 1; i <= n; i++) {

        final TextView mPageNumber = new TextView(getActivity());
        mPageNumber.setText("" + i);
        mPageNumber.setId(Integer.parseInt(String.valueOf(i)));
        mPageNumber.setTextColor(getResources().getColor(R.color.colorWhite));
        mPageNumber.setPadding(60,30,60,30);
        final int id_ = mPageNumber.getId();
        LinearLayout layout = (LinearLayout) getView().findViewById(R.id.pagination);
        layout.setBackgroundResource(R.color.colorPrimary);
        layout.addView(mPageNumber);

OnClickListener

mPageNumber.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (toastMessage!= null) {
                    toastMessage.cancel();
                }

                toastMessage = Toast.makeText(getActivity().getApplicationContext(), "Button with id =" + id_ +
                        " is clicked",Toast.LENGTH_SHORT);
                current = id_;
                toastMessage.show(); mPageNumber.setTextColor(getResources().getColor(R.color.colorOrange));

Answer 1

你可以这样使用:~

mPageNumber.setOnTouchListener(new View.OnTouchListener()
{
    @Override
    public boolean onTouch(View view, MotionEvent motionEvent)
    {
        switch (motionEvent.getAction()){
            case MotionEvent.ACTION_DOWN:
                textView.setTextColor(Color.RED);
                break;
            case MotionEvent.ACTION_UP:
                textView.setTextColor(Color.BLUE);
                break;
        }
        return false;
    }
});

Answer 2

您可以遍历布局中的所有子项并将颜色设置为白色，然后将所选颜色设置为橙色，如下例所示。

LinearLayout layout;
private void setAllTextColorAsWhite() {
    if(layout == null) {
        return;
    }

    int childCount = layout.getChildCount();

    for (int i = 0; i < childCount; i++) {
        TextView textView = (TextView) layout.getChildAt(i);
        textView.setTextColor(getResources().getColor(R.color.white));
    }
}

public void setTextViews() {
    layout = (LinearLayout) getView().findViewById(R.id.pagination);

    layout.removeAllViews();

    for (int i = 1; i <= n; i++) {

        final TextView mPageNumber = new TextView(getActivity());
        mPageNumber.setText("" + i);
        mPageNumber.setId(Integer.parseInt(String.valueOf(i)));
        mPageNumber.setTextColor(getResources().getColor(R.color.colorWhite));
        mPageNumber.setPadding(60, 30, 60, 30);
        final int id_ = mPageNumber.getId();

        layout.setBackgroundResource(R.color.colorPrimary);
        layout.addView(mPageNumber);

        mPageNumber.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (toastMessage!= null) {
                    toastMessage.cancel();
                }

                toastMessage = Toast.makeText(getActivity().getApplicationContext(), "Button with id =" + id_ +
                        " is clicked",Toast.LENGTH_SHORT);
                current = id_;
                toastMessage.show();

                setAllTextColorAsWhite();

                mPageNumber.setTextColor(getResources().getColor(R.color.colorOrange));
            }
        });
    }
}

Answer 3

你必须这样做

for (int i = 1; i <= n; i++) {

    final TextView mPageNumber = new TextView(getActivity());
    mPageNumber.setText("" + i);
    mPageNumber.setId(Integer.parseInt(String.valueOf(i)));
    mPageNumber.setTextColor(getResources().getColor(R.color.colorWhite));
    mPageNumber.setPadding(60,30,60,30);
    mPageNumber.setOnClickListener(this);
    final int id_ = mPageNumber.getId();
    LinearLayout layout = (LinearLayout) getView().findViewById(R.id.pagination);
    layout.setBackgroundResource(R.color.colorPrimary);
    layout.addView(mPageNumber);

现在你必须像这样实现 onclick 方法

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.1:
            //code for click textview.
            break;
    }
}

编码愉快。

Answer 4

最简单的方法是将 TextView 引用保存到数组中，如下所示：

final TextView[] mPageNumbers;
for (int i = 1; i <= n; i++) {
    mPageNumbers[i] = new TextView(getActivity());
    mPageNumber[i].setText("" + i);
.
.
.
for (int i=0; i<mPageNumbers.length; i++) {
    if (view.getId() == mPageNumbers[i].getId()) {
    mPageNumber.setTextColor(getResources().getColor(R.color.colorOrange));
        } else {
        mPageNumber.setTextColor(getResources().getColor(R.color.colorWhite));
        }
    }

最后，循环TextView引用，然后手动设置颜色，如果id相同，设置橙色，如果不同（意味着其他textViews），设置白色。

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