Question

我正在开发一个Android单词搜索应用程序，我已动态创建一个tablelayout，其上带有textviews来保存每个字母。当用户的手指在字母网格上滑动时，我想更改那些textviews的背景颜色。

这是表格布局的代码：

public void createGrid(char[][] input) {
    RelativeLayout rl = (RelativeLayout)findViewById(R.id.rl);
    TableLayout table = (TableLayout) findViewById(R.id.mainLayout);
    table.setTag(1);
    Typeface font = Typeface.createFromAsset(getAssets(), "kg.ttf");
    int j;



    for (int i = 0; i < input.length; i++) {
        LinearLayout rowLayout = new LinearLayout(this);
        rowLayout.setOrientation(LinearLayout.HORIZONTAL);
        rowLayout.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
        final TableRow row = new TableRow(this);
        row.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
        row.setGravity(Gravity.CENTER_HORIZONTAL);

        for (j = 0; j < input.length; j++) {
            final TextView text = new TextView(this);
            Character temp = input[i][j];
            text.setTag(i);
            text.setText(temp.toString());
            text.setPadding(20, 20, 20, 20);
            text.setTag(i);
            text.setTextSize(txtSize);
            text.setTypeface(font);
            text.setGravity(Gravity.CENTER);
            text.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    view.setBackgroundColor(Color.parseColor("#c03768b7"));
                    ((TextView)view).setTextColor(Color.WHITE);
                }
            });
            row.addView(text);
            row.getChildAt(j);

        }
        table.addView(row);

    }
  }

正如您所看到的，我在每个OnClickListeners上分配了TextViews。但我想要一个无障碍的突出显示，有没有办法将其改为刷卡而不是点击每个textviews？

非常感谢任何评论，答案和建议。

编辑：

我要做的是在刷文本时更改文本中字母的颜色。

Answer 1

如下所述检测滑动并实现更改textview背景颜色的功能

     text.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {

                    switch (event.getAction()) {

                        case MotionEvent.ACTION_DOWN:
                            x1 = event.getX();
                            y1 = event.getY();
                            t1 = System.currentTimeMillis();
                            return true;
                        case MotionEvent.ACTION_UP:
                            x2 = event.getX();
                            y2 = event.getY();
                            t2 = System.currentTimeMillis();

                            if (x1 > x2) {
                                Toast.makeText(getActivity(), "Left swipe", Toast.LENGTH_SHORT).show();
                                // Insert your code to change the color of the textview background.
                  v.setBackgroundColor(Color.parseColor("#c03768b7")); 
                            } else if (x2 > x1) {
                                Toast.makeText(getActivity(), "Right swipe", Toast.LENGTH_SHORT).show();
                  v.setBackgroundColor(Color.parseColor("#c03768b7")); 
                               // Insert your code to change the color of the textview background.

                            } 


                            return true;
                    }

                    return false;
                }

如何在滑动时更改textview背景的颜色？

1 个答案: