在我的程序中,我有一个带有一个TableRow的TableLayout,其中我在Button Click上动态添加了更多带有4个TextView的TableRows。现在,如果我改变手机的方向,我想保存并恢复此表。
我有以下代码应该这样做:
@Override
protected void onSaveInstanceState(Bundle outState) {
rowcount = tableLayout.getChildCount();
for (int i = 0; i < rowcount; i++) {
View row = tableLayout.getChildAt(i);
if (row instanceof TableRow) {
View rowchild1 = tableRow.getChildAt(0);
if (rowchild1 instanceof TextView) {
savewarnum[i] = ((TextView) rowchild1).getText().toString();
}
View rowchild2 = tableRow.getChildAt(1);
if (rowchild2 instanceof TextView) {
savewarname[i] = ((TextView) rowchild2).getText().toString();
}
View rowchild3 = tableRow.getChildAt(2);
if (rowchild3 instanceof TextView) {
savewarmeng[i] = ((TextView) rowchild3).getText().toString();
}
View rowchild4 = tableRow.getChildAt(3);
if (rowchild4 instanceof TextView) {
savewarpreis[i] = ((TextView) rowchild4).getText().toString();
}
}
}
outState.putStringArray("Nummer", savewarnum);
outState.putStringArray("Name", savewarname);
outState.putStringArray("Menge", savewarmeng);
outState.putStringArray("Preis", savewarpreis);
outState.putInt("Rows", rowcount);
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
savewarnum = savedInstanceState.getStringArray("Nummer");
savewarname = savedInstanceState.getStringArray("Name");
savewarmeng = savedInstanceState.getStringArray("Menge");
savewarpreis = savedInstanceState.getStringArray("Preis");
rowcount = savedInstanceState.getInt("Rows");
tableLayout = (TableLayout) findViewById(R.id.kaufwaren);
for(int i=0; i<=rowcount; i++) {
View tablechild = tableLayout.getChildAt(i);
if (tablechild instanceof TableRow) {
View rowchild1 = tableRow.getChildAt(0);
if (rowchild1 instanceof TextView) {
((TextView) rowchild1).setText(savewarnum[i]);
}
View rowchild2 = tableRow.getChildAt(1);
if (rowchild2 instanceof TextView) {
((TextView) rowchild2).setText(savewarname[i]);
}
View rowchild3 = tableRow.getChildAt(2);
if (rowchild3 instanceof TextView) {
((TextView) rowchild3).setText(savewarmeng[i]);
}
View rowchild4 = tableRow.getChildAt(3);
if (rowchild4 instanceof TextView) {
((TextView) rowchild4).setText(savewarpreis[i]);
}
}
createtablerow();
}
super.onRestoreInstanceState(savedInstanceState);
}
在我的onSavedInstanceState方法中,我通过我的表格,我在StringArray中保存每个Textview。在onRestoreInstanceState中,我尝试重新创建表。
现在我有两个问题。我的第一个问题是,我的程序没有通过onSavedInstanceState中的表格。它只是将最后一行的TextViews添加到我的字符串数组而不是所有行的TextViews。
例如,我有两行:
第1行:&#39; abc&#39; &#39; 123&#39; &#39; DEF&#39; &#39; 456&#39;
第2行:&#39; cba&#39; &#39; 321&#39; &#39;馈&#39; &#39; 654&#39;
现在ABC和CBA应该在我的第一个字符串数组中,但有两次CBA,因为它是最后一行。
我的第二个问题是onRestoreInstanceState。一到达&#39;查看rowchild1 = tableRow.getChildAt(0);&#39;我的程序崩溃了。
有人知道解决方案吗?
答案 0 :(得分:0)
您应该在使用tableRow
onSaveInstanceState
变量
@Override
protected void onSaveInstanceState(Bundle outState) {
...
View row = tableLayout.getChildAt(i);
if (row instanceof TableRow) {
TableRow tableRow = (TableRow) row;
View rowchild1 = tableRow.getChildAt(0);
...
}
}
同样可能是onRestoreInstanceState
中的问题。
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
...
if (tablechild instanceof TableRow) {
TableRow tableRow = (TableRow) tablechild;
View rowchild1 = tableRow.getChildAt(0);
...
}
}