当用户在我的应用中点击一个 Button
(该按钮是在一个SurfaceView
中打印出来的),我希望一个文本 Dialog
出现,并且我想要将结果存储在一个 String
中。我希望这个文本 Dialog
能够覆盖当前屏幕。我该如何实现?
看起来可以使用AlertDialog。
尽管这看起来很基础,但 Android 并没有内置的对话框可以实现此功能(据我所知)。幸运的是,在创建标准 AlertDialog 的基础上,这只需要额外的一点工作。您只需创建一个 EditText 以供用户输入数据,并将其设置为 AlertDialog 的视图即可。如果您需要,可以使用setInputType自定义允许的输入类型。
如果您能够使用成员变量,您只需将该变量设置为 EditText 的值,它将在对话框关闭后保留。如果您不能使用成员变量,则可能需要使用监听器将字符串值发送到正确的位置。(如果需要,我可以编辑并详细说明)。
在您的类中:
private String m_Text = "";
我将在@Aaron的回答基础上补充一种方法,使您有机会更好地设计对话框样式。以下是一个调整后的示例:
AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
builder.setTitle("Title");
// I'm using fragment here so I'm using getView() to provide ViewGroup
// but you can provide here any other instance of ViewGroup from your Fragment / Activity
View viewInflated = LayoutInflater.from(getContext()).inflate(R.layout.text_inpu_password, (ViewGroup) getView(), false);
// Set up the input
final EditText input = (EditText) viewInflated.findViewById(R.id.input);
// Specify the type of input expected; this, for example, sets the input as a password, and will mask the text
builder.setView(viewInflated);
// Set up the buttons
builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
m_Text = input.getText().toString();
}
});
builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.show();
这是用于创建 EditText 对话框的示例布局:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="@dimen/content_padding_normal">
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<AutoCompleteTextView
android:id="@+id/input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/hint_password"
android:imeOptions="actionDone"
android:inputType="textPassword" />
</android.support.design.widget.TextInputLayout>
</FrameLayout>
最终结果:
getView()
替换为 findViewById(android.R.id.content)
,一切都非常顺利。非常感谢你的分享 :) - Atul(ViewGroup)
将 findViewById 强制转换类型! - Martin Erlic@dimen/content_padding_normal
的值是多少? - Edric这个示例怎么样?看起来很简单。
final EditText txtUrl = new EditText(this);
// Set the default text to a link of the Queen
txtUrl.setHint("http://www.librarising.com/astrology/celebs/images2/QR/queenelizabethii.jpg");
new AlertDialog.Builder(this)
.setTitle("Moustachify Link")
.setMessage("Paste in the link of an image to moustachify!")
.setView(txtUrl)
.setPositiveButton("Moustachify", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String url = txtUrl.getText().toString();
moustachify(null, url);
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
})
.show();
input
视图的左右两侧留出一些空间,可以添加一些内边距,例如:private fun showAlertWithTextInputLayout(context: Context) {
val textInputLayout = TextInputLayout(context)
textInputLayout.setPadding(
resources.getDimensionPixelOffset(R.dimen.dp_19), // if you look at android alert_dialog.xml, you will see the message textview have margin 14dp and padding 5dp. This is the reason why I use 19 here
0,
resources.getDimensionPixelOffset(R.dimen.dp_19),
0
)
val input = EditText(context)
textInputLayout.hint = "Email"
textInputLayout.addView(input)
val alert = AlertDialog.Builder(context)
.setTitle("Reset Password")
.setView(textInputLayout)
.setMessage("Please enter your email address")
.setPositiveButton("Submit") { dialog, _ ->
// do some thing with input.text
dialog.cancel()
}
.setNegativeButton("Cancel") { dialog, _ ->
dialog.cancel()
}.create()
alert.show()
}
dimens.xml
<dimen name="dp_19">19dp</dimen>
希望它有所帮助。它对我起作用了
private void showForgotDialog(Context c) {
final EditText taskEditText = new EditText(c);
AlertDialog dialog = new AlertDialog.Builder(c)
.setTitle("Forgot Password")
.setMessage("Enter your mobile number?")
.setView(taskEditText)
.setPositiveButton("Reset", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String task = String.valueOf(taskEditText.getText());
}
})
.setNegativeButton("Cancel", null)
.create();
dialog.show();
}
如何调用?(当前活动名称)
showForgotDialog(current_activity_name.this);
我发现通过扩展 AlertDialog.Builder
来创建自定义对话框类更加清晰和可重用。这是为了一个要求用户输入电话号码的对话框。在调用 show()
前可以通过调用 setNumber()
来提供预设的电话号码。
InputSenderDialog.java
public class InputSenderDialog extends AlertDialog.Builder {
public interface InputSenderDialogListener{
public abstract void onOK(String number);
public abstract void onCancel(String number);
}
private EditText mNumberEdit;
public InputSenderDialog(Activity activity, final InputSenderDialogListener listener) {
super( new ContextThemeWrapper(activity, R.style.AppTheme) );
@SuppressLint("InflateParams") // It's OK to use NULL in an AlertDialog it seems...
View dialogLayout = LayoutInflater.from(activity).inflate(R.layout.dialog_input_sender_number, null);
setView(dialogLayout);
mNumberEdit = dialogLayout.findViewById(R.id.numberEdit);
setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
if( listener != null )
listener.onOK(String.valueOf(mNumberEdit.getText()));
}
});
setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
if( listener != null )
listener.onCancel(String.valueOf(mNumberEdit.getText()));
}
});
}
public InputSenderDialog setNumber(String number){
mNumberEdit.setText( number );
return this;
}
@Override
public AlertDialog show() {
AlertDialog dialog = super.show();
Window window = dialog.getWindow();
if( window != null )
window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
return dialog;
}
}
dialog_input_sender_number.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:padding="10dp">
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
android:paddingBottom="20dp"
android:text="Input phone number"
android:textAppearance="@style/TextAppearance.AppCompat.Large" />
<TextView
android:id="@+id/numberLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="@+id/title"
app:layout_constraintLeft_toLeftOf="parent"
android:text="Phone number" />
<EditText
android:id="@+id/numberEdit"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="@+id/numberLabel"
app:layout_constraintLeft_toLeftOf="parent"
android:inputType="phone" >
<requestFocus />
</EditText>
</android.support.constraint.ConstraintLayout>
使用方法:
new InputSenderDialog(getActivity(), new InputSenderDialog.InputSenderDialogListener() {
@Override
public void onOK(final String number) {
Log.d(TAG, "The user tapped OK, number is "+number);
}
@Override
public void onCancel(String number) {
Log.d(TAG, "The user tapped Cancel, number is "+number);
}
}).setNumber(someNumberVariable).show();
@LukeTaylor: 我目前也有同样的任务(创建包含EditText的弹出窗口/对话框)..
个人而言,我觉得完全动态的方式在创意方面有些受限。
完全自定义对话框布局:
与其完全依赖代码来创建对话框,你可以像下面这样完全自定义它:
1) - 创建一个新的布局资源
文件。这将作为你的对话框,允许完全自由创作!
注意:请参考Material Design指南,以帮助保持界面整洁和准确。
2) - 为所有的View
元素分配ID。在我的示例代码中,我有1个EditText
和2个Buttons
。
3) - 创建一个带有Button
的Activity
,用于测试目的。我们将使其填充并启动您的对话框!
public void buttonClick_DialogTest(View view) {
AlertDialog.Builder mBuilder = new AlertDialog.Builder(MainActivity.this);
// Inflate the Layout Resource file you created in Step 1
View mView = getLayoutInflater().inflate(R.layout.timer_dialog_layout, null);
// Get View elements from Layout file. Be sure to include inflated view name (mView)
final EditText mTimerMinutes = (EditText) mView.findViewById(R.id.etTimerValue);
Button mTimerOk = (Button) mView.findViewById(R.id.btnTimerOk);
Button mTimerCancel = (Button) mView.findViewById(R.id.btnTimerCancel);
// Create the AlertDialog using everything we needed from above
mBuilder.setView(mView);
final AlertDialog timerDialog = mBuilder.create();
// Set Listener for the OK Button
mTimerOk.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick (View view) {
if (!mTimerMinutes.getText().toString().isEmpty()) {
Toast.makeText(MainActivity.this, "You entered a Value!,", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(MainActivity.this, "Please enter a Value!", Toast.LENGTH_LONG).show();
}
}
});
// Set Listener for the CANCEL Button
mTimerCancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick (View view) {
timerDialog.dismiss();
}
});
// Finally, SHOW your Dialog!
timerDialog.show();
// END OF buttonClick_DialogTest
}
小菜一碟!完全的创意自由!只要遵循 Material Guidelines 就可以啦 ;)
希望这能帮到某些人! 让我知道你们的想法吧!
这是@Studio2bDesigns的答案的Kotlin实现,它提供了通过自定义布局创建文本输入对话框的功能。我将其用于设置对话框,因此使用了不同的变量名称。
val alertDialog = AlertDialog.Builder(this).create()
val settingsBinding = SettingsDialogBinding.inflate(layoutInflater) // SettingsDialogBinding provided by View binding
alertDialog.setView(settingsBinding.root)
settingsBinding.etLink.setText("Some text here")
settingsBinding.btnSave.setOnClickListener {
if (settingsBinding.etLink.text.toString().isNotBlank()) {
Toast.makeText(this, "You entered a Value!", Toast.LENGTH_LONG).show()
} else {
Toast.makeText(this, "Please enter a Value!", Toast.LENGTH_LONG).show()
}
}
settingsBinding.btnCancel.setOnClickListener {
alertDialog.dismiss() // close the dialog
}
alertDialog.show()
global Context, Context cont;
然后,在 alertdialog 中用cont
替换 "this"。AlertDialog.Builder builder = new AlertDialog.Builder(cont); final EditText input = new EditText(cont); - user2891317