Android 停用AlertDialog“;“好的”;按钮,直到在AlertDialog视图的EditText上键入文本
在android studio中,我需要停用Android 停用AlertDialog“;“好的”;按钮,直到在AlertDialog视图的EditText上键入文本,android,android-studio,android-alertdialog,Android,Android Studio,Android Alertdialog,在android studio中,我需要停用警报对话框的肯定(OK)按钮,直到用户键入EditText只需创建一个自定义警报对话框,然后应用您的逻辑 LayoutInflater layoutInflaterAndroid = LayoutInflater.from(context); View mView = layoutInflaterAndroid.inflate(R.layout.your_dialog_xml, null); AlertDialog.Bu
警报对话框的肯定(OK)按钮,直到用户键入EditText
只需创建一个自定义警报对话框,然后应用您的逻辑
LayoutInflater layoutInflaterAndroid = LayoutInflater.from(context);
View mView = layoutInflaterAndroid.inflate(R.layout.your_dialog_xml, null);
AlertDialog.Builder alertDialogBuilderUserInput = new AlertDialog.Builder(context);
alertDialogBuilderUserInput.setView(mView);
alertDialogBuilderUserInput.setCancelable(false);
final AlertDialog alertDialogAndroid = alertDialogBuilderUserInput.create();
final TextView tv_title = mView.findViewById(R.id.tv_title);
final EditText et_message = mView.findViewById(R.id.et_message);
final Button bt_ok = mView.findViewById(R.id.bt_ok);
final Button bt_cancel = mView.findViewById(R.id.bt_cancel);
tv_message.setText(message);
bt_ok.setText(ok_text);
bt_cancel.setText(cancel_text);
// set on text change listener and enable buttons as per your choice
et_message.set....
bt_ok.setOnClickListener(view -> {
alertDialogAndroid.cancel();
if (callback != null) callback.onSubmit("");
});
bt_cancel.setOnClickListener(view -> {
alertDialogAndroid.cancel();
if (callback != null) callback.onCancel();
});
alertDialogAndroid.show();
只需创建一个自定义警报对话框,然后应用您的逻辑
LayoutInflater layoutInflaterAndroid = LayoutInflater.from(context);
View mView = layoutInflaterAndroid.inflate(R.layout.your_dialog_xml, null);
AlertDialog.Builder alertDialogBuilderUserInput = new AlertDialog.Builder(context);
alertDialogBuilderUserInput.setView(mView);
alertDialogBuilderUserInput.setCancelable(false);
final AlertDialog alertDialogAndroid = alertDialogBuilderUserInput.create();
final TextView tv_title = mView.findViewById(R.id.tv_title);
final EditText et_message = mView.findViewById(R.id.et_message);
final Button bt_ok = mView.findViewById(R.id.bt_ok);
final Button bt_cancel = mView.findViewById(R.id.bt_cancel);
tv_message.setText(message);
bt_ok.setText(ok_text);
bt_cancel.setText(cancel_text);
// set on text change listener and enable buttons as per your choice
et_message.set....
bt_ok.setOnClickListener(view -> {
alertDialogAndroid.cancel();
if (callback != null) callback.onSubmit("");
});
bt_cancel.setOnClickListener(view -> {
alertDialogAndroid.cancel();
if (callback != null) callback.onCancel();
});
alertDialogAndroid.show();
尝试此代码,希望它能帮助您
bt_ok.setenable(false);
并在文本更改时启用它
bt_ok.setenable(true);
尝试此代码,希望它能帮助您
bt_ok.setenable(false);
并在文本更改时启用它
bt_ok.setenable(true);
首先,您应该在布局文件夹中创建一个自定义警报对话框
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:id="@+id/edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="top"
android:layout_margin="10dp"
android:textSize="15sp"
android:hint="@string/hint"
android:inputType="textCapWords"
android:singleLine="true"
android:layout_marginTop="10dp"
android:background="@null"
android:maxLines="1"
android:scrollbars="vertical"
android:importantForAutofill="no" />
</LinearLayout>
之后,我们需要创建一个警报对话框。这里需要的是通过传递我们创建的最终视图,使用setView()
函数指定编辑文本。由于您没有取消按钮,因此我们不需要在此处调用builder.setCancelable(false)
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setView(view);
builder.setPositiveButton("OK", (dialogInterface, i) -> {
//Whatever you would like to do after pressing the OK button.
});
AlertDialog dialog = builder.create();
dialog.show();
为了获得OK按钮,我们需要通过对话框的getButton()
函数调用。请记住,您需要调用setEnabled(false)
,以便在默认情况下禁用它
Button button = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
button.setEnabled(false);
最后一步是在编辑文本中添加文本观察者,以便在键入任何内容时通知我们
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
if (editText.getText().length() > 0){
button.setEnabled(true);
}else{
button.setEnabled(false);
}
}
@Override
public void afterTextChanged(Editable editable) {
}
});
函数中的最终代码应如下所示:
public void getAlertDialog() {
LayoutInflater layoutInflater= this.getLayoutInflater();
final View view = layoutInflater.inflate(R.layout.dialog, null);
EditText editText = view.findViewById(R.id.edit_text);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setView(view);
builder.setPositiveButton("OK", (dialogInterface, i) -> {
//Whatever you would like to do after pressing the OK button.
});
AlertDialog dialog = builder.create();
dialog.show();
Button button = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
button.setEnabled(false);
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
if (editText.getText().length() > 0){
button.setEnabled(true);
}else{
button.setEnabled(false);
}
}
@Override
public void afterTextChanged(Editable editable) {
}
});
}
首先,您应该在布局文件夹中创建一个自定义警报对话框
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:id="@+id/edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="top"
android:layout_margin="10dp"
android:textSize="15sp"
android:hint="@string/hint"
android:inputType="textCapWords"
android:singleLine="true"
android:layout_marginTop="10dp"
android:background="@null"
android:maxLines="1"
android:scrollbars="vertical"
android:importantForAutofill="no" />
</LinearLayout>
之后,我们需要创建一个警报对话框。这里需要的是通过传递我们创建的最终视图,使用setView()
函数指定编辑文本。由于您没有取消按钮,因此我们不需要在此处调用builder.setCancelable(false)
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setView(view);
builder.setPositiveButton("OK", (dialogInterface, i) -> {
//Whatever you would like to do after pressing the OK button.
});
AlertDialog dialog = builder.create();
dialog.show();
为了获得OK按钮,我们需要通过对话框的getButton()
函数调用。请记住,您需要调用setEnabled(false)
,以便在默认情况下禁用它
Button button = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
button.setEnabled(false);
最后一步是在编辑文本中添加文本观察者,以便在键入任何内容时通知我们
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
if (editText.getText().length() > 0){
button.setEnabled(true);
}else{
button.setEnabled(false);
}
}
@Override
public void afterTextChanged(Editable editable) {
}
});
函数中的最终代码应如下所示:
public void getAlertDialog() {
LayoutInflater layoutInflater= this.getLayoutInflater();
final View view = layoutInflater.inflate(R.layout.dialog, null);
EditText editText = view.findViewById(R.id.edit_text);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setView(view);
builder.setPositiveButton("OK", (dialogInterface, i) -> {
//Whatever you would like to do after pressing the OK button.
});
AlertDialog dialog = builder.create();
dialog.show();
Button button = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
button.setEnabled(false);
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
if (editText.getText().length() > 0){
button.setEnabled(true);
}else{
button.setEnabled(false);
}
}
@Override
public void afterTextChanged(Editable editable) {
}
});
}
用魅力工作:)用魅力工作:)