可能重复:
循环通过editTexts来检查值
我有一个包含大约 100 个编辑文本(15 行,10 列)的布局,所有这些都根据它们的行/列 ID 命名(例如 box0101、box0102 等)。
我有一个方法 clearBoard() 在单击“清除”按钮时调用(请参见下面的代码)。它旨在遍历所有框(box0101、box0102、box0103 等)并用“”替换内容 - 使它们为空白。
LogCat 中出现的错误说 java.lang.NoSuchFieldException: box0101 at java.lang.Class.getDeclaredField(Class.java:631) - 但在我的 xml 中肯定有一个 box0101 定义,我在此期间多次引用它代码没有问题。
有任何想法吗?
从 XML
<EditText
android:gravity="center"
android:layout_marginLeft="10dp"
android:id="@+id/box0101"
android:layout_width="30dp"
android:layout_height="30dp"
android:background="@drawable/boxoutlineone" />
<EditText
android:gravity="center"
android:id="@+id/box0201"
android:layout_width="30dp"
android:layout_height="30dp"
android:background="#000000" />
<EditText
android:gravity="center"
android:id="@+id/box0301"
android:layout_width="30dp"
android:layout_height="30dp"
android:background="#000000" />
<EditText
android:gravity="center"
android:id="@+id/box0401"
android:layout_width="30dp"
android:layout_height="30dp"
android:background="#000000" />
在活动中:
final EditText box0101 = (EditText)findViewById(R.id.box0101);
final EditText box0201 = (EditText)findViewById(R.id.box0201);
final EditText box0301 = (EditText)findViewById(R.id.box0301);
final EditText box0401 = (EditText)findViewById(R.id.box0401);
final EditText box0501 = (EditText)findViewById(R.id.box0501);
ETC...
public void clearBoard() {
final int ROW_COUNT = 14;
final int COL_COUNT = 9;
final String ROWS[] = {"01","02","03","04","05","06","07","08","09","10","11","12","13","14","15"};
final String COLS[] = {"01","02","03","04","05","06","07","08","09","10"};
for(int i=0; i<ROW_COUNT; i++) {
for(int j=0; j<COL_COUNT; j++) {
String a = ROWS[i];
String b = COLS[j];
int editTextId=getResId("box"+a+b,this,id.class);
EditText et=(EditText)findViewById(editTextId);
et.setText("");
}
}
}
public static int getResId(String variableName, Context context, Class<?> c) {
try {
Field idField = c.getDeclaredField(variableName);
return idField.getInt(idField);
} catch (Exception e) {
e.printStackTrace();
return -1;
}
}