在AlertDialog[Android]中单击“正”按钮时崩溃

当我单击此警报对话框的肯定按钮时，应用程序崩溃。这个代码有什么问题吗？我感觉复选框分配不正确

private void showSmimeSettings(){

    AlertDialog.Builder smimeBuilder = new AlertDialog.Builder(this);
    smimeBuilder.setTitle("S/MIME Settings");

    LayoutInflater inflator = getLayoutInflater();
    View checkboxLayout = inflator.inflate(R.layout.smime_settings_checkbox, null);
    smimeBuilder.setView(checkboxLayout);

    final CheckBox signed_checkbox = (CheckBox) findViewById(R.id.signed_checkBox);
    final CheckBox encrypted_checkbox = (CheckBox) findViewById(R.id.encrypted_checkBox);


    smimeBuilder.setPositiveButton("Save", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface arg0, int arg1) {
            if (signed_checkbox.isChecked()) {
                mIsSigned = true;
            } else {
                mIsSigned = false;
            }
            if (encrypted_checkbox.isChecked()) {
                mIsEncrypted = true;
            } else {
                mIsEncrypted = false;
            }
        }
    });

    AlertDialog smimeDialog = smimeBuilder.create();
    smimeDialog.show();     
}

日志：

---

我认为你应该在扩大布局后重新选中复选框

LayoutInflater inflator = getLayoutInflater();
View checkboxLayout = inflator.inflate(R.layout.smime_settings_checkbox, null);

final CheckBox signed_checkbox = (CheckBox) checkboxLayout.findViewById(R.id.signed_checkBox);
final CheckBox encrypted_checkbox = (CheckBox) checkBoxLayout.findViewById(R.id.encrypted_checkBox);

布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <CheckBox
        android:id="@+id/signed_checkBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="CheckBox" 
        />

    <CheckBox
        android:id="@+id/encrypted_checkBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="CheckBox" />

</LinearLayout>

尝试过，但仍然崩溃。已更新。基本上，这些复选框即使在赋值之后也是空的。你知道为什么它们会是空的吗？没有编译时错误，因此R.id.signed_复选框和R.id.encrypted_复选框已解决。您是否注意到

checkboxLayout.findViewById（..）

中的

checkboxLayout.

？请发布您更新的新代码。检查我的布局并与您的进行比较。是的，基本上是相同的。您解决了这个问题吗？我也面临同样的问题。

private void showSmimeSettings(){

    AlertDialog.Builder smimeBuilder = new AlertDialog.Builder(this);
    smimeBuilder.setTitle("S/MIME Settings");

    LayoutInflater inflator = getLayoutInflater();
    View checkboxLayout = inflator.inflate(R.layout.smime_settings_checkbox, null);

    smimeBuilder.setView(checkboxLayout);
    final CheckBox signed_checkbox = (CheckBox) checkboxLayout.findViewById(R.id.signed_checkBox);
    final CheckBox encrypted_checkbox = (CheckBox) checkboxLayout.findViewById(R.id.encrypted_checkBox);


    smimeBuilder.setPositiveButton("Save", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface arg0, int arg1) {
            if (signed_checkbox.isChecked()) {
                mIsSigned = true;
            } else {
                mIsSigned = false;
            }
            if (encrypted_checkbox.isChecked()) {
                mIsEncrypted = true;
            } else {
                mIsEncrypted = false;
            }
        }
    });

    AlertDialog smimeDialog = smimeBuilder.create();
    smimeDialog.show();     
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <CheckBox
        android:id="@+id/signed_checkBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="CheckBox" 
        />

    <CheckBox
        android:id="@+id/encrypted_checkBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="CheckBox" />

</LinearLayout>