我有一个添加了编辑文字的警告对话框。它有正面和负面的按钮。每当我单击positive / ok按钮时，即使edittext为空，对话框也会退出。
我想控制这种行为。即;我希望仅当edittext不为空时才会退出alertdialog。
注意：strAuthorDesc是一个String变量。
以下是单击按钮时执行的代码。
AlertDialog.Builder builder = new AlertDialog.Builder(mActivity);
builder.setTitle("Author Desc.");
final EditText descInput = new EditText(mActivity);
descInput.setInputType(InputType.TYPE_CLASS_TEXT);
descInput.setTextColor(ContextCompat.getColor(mActivity, R.color.black));
descInput.setLines(5);
// descInput.setMaxLines(5);
descInput.setGravity(Gravity.LEFT | Gravity.TOP);
descInput.setSingleLine(false);
descInput.setHorizontalScrollBarEnabled(false);
builder.setView(descInput);
builder.setPositiveButton("SAVE", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
strAuthorDesc = descInput.getText().toString();
if(strAuthorDesc != null && !strAuthorDesc.equals("")){
dialog.dismiss();
Const.showToast("Description added", mActivity);
setAuthorDesc();
}else{
Const.showToast("Desc. cannot be empty!", mActivity);
}
}
});
builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog = builder.create();
alertDialog.setCancelable(false);
alertDialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
alertDialog.show();
答案 0 :(得分：0)
检查editext是否为空
请查看以下代码以供参考
EditText usernameEditText = (EditText) findViewById(R.id.editUsername);
sUsername = usernameEditText.getText().toString();
if (sUsername.matches("")) {
Toast.makeText(this, "You did not enter a username", Toast.LENGTH_SHORT).show();
return;
}
从您的代码中检查以下更新的代码，它将适合您
AlertDialog.Builder builder = new AlertDialog.Builder(mActivity);
builder.setTitle("Author Desc.");
final EditText descInput = new EditText(mActivity);
descInput.setInputType(InputType.TYPE_CLASS_TEXT);
descInput.setTextColor(ContextCompat.getColor(mActivity, R.color.black));
descInput.setLines(5);
// descInput.setMaxLines(5);
descInput.setGravity(Gravity.LEFT | Gravity.TOP);
descInput.setSingleLine(false);
descInput.setHorizontalScrollBarEnabled(false);
builder.setView(descInput);
builder.setPositiveButton("SAVE", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
strAuthorDesc = scInput.getText().toString();
if (strAuthorDesc.matches("")) {
dialog.dismiss();
Const.showToast("Description added",mActivity);
setAuthorDesc();
}else{
Const.showToast("Desc. cannot be empty!",mActivity);
}
}
});
builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog = builder.create();
alertDialog.setCancelable(false);
alertDialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
alertDialog.show();
答案 1 :(得分：0)
我想我已经弄明白了。现在发生的是默认状态是在按下正或负按钮时关闭对话框，所以我们需要覆盖正按钮然后在那里进行验证。这是下面的代码。
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Author Desc.");
final EditText descInput = new EditText(this);
descInput.setInputType(InputType.TYPE_CLASS_TEXT);
descInput.setTextColor(ContextCompat.getColor(this, android.R.color.black));
descInput.setLines(5);
// descInput.setMaxLines(5);
descInput.setGravity(Gravity.LEFT | Gravity.TOP);
descInput.setSingleLine(false);
descInput.setHorizontalScrollBarEnabled(false);
builder.setView(descInput);
builder.setPositiveButton("SAVE", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog = builder.create();
alertDialog.setCancelable(false);
alertDialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
alertDialog.show();
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
descInput.getText().toString();
if(descInput.getText().toString().equals("")){
Log.d("Test","Is empty");
}else{
Log.d("Test","Is Not Empty "+descInput.getText().toString());
alertDialog.dismiss();
}
}
});
我希望这有帮助！
我在此链接How to prevent a dialog from closing when a button is clicked
找到了与对话框相关的问题答案 2 :(得分：0)
将builder.setCancelable(false);置于alertDialog构建器的定义之下。
然后是你的正面/负面按钮
builder.setPositiveButton("SAVE", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
strAuthorDesc = descInput.getText().toString();
if(strAuthorDesc != null && !strAuthorDesc.equals("")){
解除Dialog后，不要调用任何方法，调用dismiss（） 最后一次
dialog.dismiss();
Const.showToast("Description added", mActivity);
setAuthorDesc();
}else{
Const.showToast("Desc. cannot be empty!", mActivity);
}
}
});
builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
答案 3 :(得分：0)
我使用Dialog类而不是AlertDialog / Builder或扩展DialogFragment或Dialog类解决了这个问题。
这是代码。
private void showDescDialog(boolean isEditingDesc, String textToEdit){
final Dialog dialog = new Dialog(mActivity);
dialog.setContentView(R.layout.custom_dialog_author_desc);
dialog.setTitle("");
TextView tvHeading = (TextView) dialog.findViewById(R.id.tv_heading);
final EditText descInput = (EditText) dialog.findViewById(R.id.et_author_desc);
Button btnSave = (Button) dialog.findViewById(R.id.btn_save);
Button btnCancel = (Button) dialog.findViewById(R.id.btn_cancel);
if(isEditingDesc){
descInput.setText(textToEdit);
tvHeading.setText("Edit author description");
}else{
tvHeading.setText("Add author description");
}
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
strAuthorDesc = descInput.getText().toString();
if(!TextUtils.isEmpty(strAuthorDesc)){
Const.showToast("Description added", mActivity);
setAuthorDesc();
dialog.dismiss();
}else{
Const.showToast("Desc. cannot be empty!", mActivity);
}
}
});
btnCancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dialog.cancel();
}
});
dialog.setCancelable(false);
dialog.show();
}