關(guān)鍵是初始化時獲取到TextView是的行數(shù)，然后進一步處理

比如大于5行的就默認收起，

• 代碼

                //1.3.7折疊字體
                tvInfo.post(new Runnable() {
                    @Override
                    public void run() {
                        int tvLine = tvInfo.getLineCount();
                        Log.e("txtPart", "run: " + txtPart);
                        if (tvLine > 5) {
                            tvShowAll.setVisibility(View.VISIBLE);
                            tvShowAll.setOnClickListener(new View.OnClickListener() {
                                @Override
                                public void onClick(View view) {
                                    if (isOpen) {
                                        tvInfo.setMaxLines(5);
                                        isOpen = false;
                                        tvShowAll.setText("全文");
                                    } else {
                                        tvInfo.setMaxLines(Integer.MAX_VALUE);
                                        isOpen = true;
                                        tvShowAll.setText("收起");
                                    }
                                }
                            });
                        }
                    }
                });

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