java.lang.IllegalStateException:指定的子级已有父级.您必须首先在子项的父项上调用removeView()[对于表]

Question

我table在我的代码中动态绘制.在tablerow我的布局,我只是在XML硬编码得到的.我不知道为什么我会收到这个错误,完全没有想法.

 TableRow tr = (TableRow) findViewById(R.id.tr);
        TableRow.LayoutParams rowParams = new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT);

    TextView textView1 = new TextView(this);
    textView1.setGravity(Gravity.CENTER);
    textView1.setBackgroundResource(R.drawable.cell_shape);
    textView1.setText("1");
    textView1.setLayoutParams(rowParams);
    tr.addView(textView1);

    TextView textView2 = new TextView(this);
    textView2.setGravity(Gravity.CENTER);
    textView2.setBackgroundResource(R.drawable.cell_shape);
    textView2.setText("2");
    textView2.setLayoutParams(rowParams);
    tr.addView(textView2);

    TextView textView3 = new TextView(this);
    textView3.setGravity(Gravity.CENTER);
    textView3.setBackgroundResource(R.drawable.cell_shape);
    textView3.setText("3");
    textView3.setLayoutParams(rowParams);
    tr.addView(textView3);

    TextView textView4 = new TextView(this);
    textView4.setGravity(Gravity.CENTER);
    textView4.setBackgroundResource(R.drawable.cell_shape);
    textView4.setText("4");
    textView4.setLayoutParams(rowParams);
    tr.addView(textView4);

    TextView textView5 = new TextView(this);
    textView5.setGravity(Gravity.CENTER);
    textView5.setBackgroundResource(R.drawable.cell_shape);
    textView5.setText("5");
    textView5.setLayoutParams(rowParams);
    tr.addView(textView5);

    TextView textView6 = new TextView(this);
    textView6.setGravity(Gravity.CENTER);
    textView6.setBackgroundResource(R.drawable.cell_shape);
    textView6.setText("6");
    textView6.setLayoutParams(rowParams);
    tr.addView(textView6);

    TextView textView7 = (TextView) findViewById(R.id.tv);
    TableRow.LayoutParams params = (TableRow.LayoutParams)textView7.getLayoutParams();
    params.span = 6;
    textView7.setLayoutParams(params);

    //tl.addView(tr, new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));

    //next row
    TableRow trNew = (TableRow) findViewById(R.id.newline);
    TableRow.LayoutParams rowParams1 = new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT);

    TextView textView8 = (TextView) findViewById(R.id.model);
    textView8.setGravity(Gravity.CENTER);
    textView8.setBackgroundResource(R.drawable.cell_shape);
    textView8.setText("Check");
    trNew.addView(textView8);

错误是由以下原因引起的: trNew.addView(textView8);

我的错误信息是:

Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

Answer 1

初始化时textView8使用

TextView textView8 = (TextView) findViewById(R.id.model);

这意味着它来自XML,可能已经有了父.这就是你得到的原因IllegalStateException

将其更改为

TextView textView8 = new TextView(this);

相反,你已经为所有其他人做了 TextView