Question

我已经编写了这个方法来动态地在表格布局中添加按钮我试图在创建按钮时为每个按钮设置高度和宽度，但是有些它是如何工作的

 private TableRow.LayoutParams rowParams;
    rowParams = new TableRow.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
    rowParams.setMargins(5, 5, 5, 5);

在上面的代码我正在设置行参数

 public void addButton_with_filter(final Test test,
            TableRow.LayoutParams rowParams, Activity context) {

        ArrayList<Integer> filteredquestionno;
        TableLayout tl = new TableLayout(context);
        LinearLayout filterlayout = (LinearLayout) findViewById(R.id.filterlayout);
        filterlayout.removeAllViewsInLayout();
        int j = 0;
        int k = 0;

        filteredquestionno = getLayoutFilteredQuestionNumber(test
                .getQuestions());

        int size = filteredquestionno.size();
        if (size == 0) {
            Toast.makeText(this,
                    "NO QUSTION IS AVAILABLE OF THIS FILTER TYPE !",
                    Toast.LENGTH_LONG).show();
        }
        int norows = (size / 5) + 1;
        {
            for (int i = 0; i < norows; i++) {
                TableRow currentRow = new TableRow(FilterActivity.this);

                while (j < 5 && k < size) {
                    j++;
                    Button qindex = new Button(FilterActivity.this);
                    qindex.setWidth(5);/*width*/
                    qindex.setHeight(5);/*height*/
                    if (submited == true) {
                        if (test.getQuestionAtIndex(filteredquestionno.get(k))
                                .isCorrectlyAnswered()) {
                            qindex.setBackgroundResource(R.drawable.correct_answer);
                        } else if (test.getQuestionAtIndex(
                                filteredquestionno.get(k)).isAttempted()) {
                            qindex.setBackgroundResource(R.drawable.wrong_answer);
                        } else if (test.getQuestionAtIndex(
                                filteredquestionno.get(k)).isSkipped()) {
                            qindex.setBackgroundResource(R.drawable.skipped_answer);
                        } else if (!test.getQuestionAtIndex(
                                filteredquestionno.get(k)).isAttempted()) {
                            qindex.setBackgroundResource(R.drawable.unattempted_question);
                        }
                    } else if (submited == false) {
                        if (test.getQuestionAtIndex(filteredquestionno.get(k))
                                .isAttempted()) {
                            qindex.setBackgroundResource(R.drawable.wrong_answer);
                        } else if (test.getQuestionAtIndex(
                                filteredquestionno.get(k)).isSkipped()) {
                            qindex.setBackgroundResource(R.drawable.skipped_answer);
                        } else if (!test.getQuestionAtIndex(
                                filteredquestionno.get(k)).isAttempted()) {
                            qindex.setBackgroundResource(R.drawable.unattempted_question);
                        }
                    }

                    qindex.setText(" " + (filteredquestionno.get(k) + 1));
                    k++;

                    qindex.setId(k);
                    qindex.setOnClickListener(new OnClickListener() {

                        @Override
                        public void onClick(View v) {
                            Button b = (Button) v;
                            String text = (String) b.getText();
                            String t = text.trim();
                            int questionindex = Integer.parseInt(t);
                            if (type == 0) {
                                test.setLastQuestionAttempted(questionindex - 1);
                                FilterActivity.this.finish();
                            } else if (type == 1) {
                                test.setLastQuestionAttempted(questionindex - 1);
                                FilterActivity.this.finish();
                            }

                        }
                    });





                    currentRow.addView(qindex, rowParams);
                }
                j = 0;
                tl.addView(currentRow);

            }
            filterlayout.addView(tl);

        }
    }

Answer 1

而不是这样做：

Button qindex = new Button(FilterActivity.this);
qindex.setWidth(5);/*width*/
qindex.setHeight(5);/*

将布局参数设置为按钮：

LayoutParams lp= new LayaoutParams(5,5); // width,height
qindex.setLayoutParams(lp);

如果你得到classCastException，请尝试：

TableLayout.LayoutParams lp= new TableLayout.LayaoutParams(5,5); // width,height
qindex.setLayoutParams(lp);

我有表布局，我试图动态添加按钮，我想减少按钮的大小我试图这样做，但大小不变

1 个答案: