嗨
我开发了用于计算矩阵的移动应用程序。今天,我想出了一个有趣的问题。在自定义AlertDialog中,顶部仅在平板电脑上显示空格:
当我在智能手机中运行该应用程序时,我没有遇到此问题:
XML代码:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorPrimary"
android:text="@string/text_save_result"
android:padding="5dp"
android:paddingStart="25dp"
android:textStyle="bold"
android:textSize="20sp"
android:textColor="@color/white"
tools:ignore="RtlSymmetry"/>
<EditText
android:id="@+id/edt_name_save"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/hint_enter_name_saving"
android:inputType="text"
android:layout_marginTop="10dp"
android:layout_marginStart="10dp"
android:layout_marginEnd="10dp"/>
<TextView
android:id="@+id/tv_error"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@color/red"
android:drawableStart="@drawable/ic_error"
android:layout_marginStart="10dp"
android:gravity="center_vertical"
android:layout_marginEnd="10dp"
android:drawablePadding="4dp"
android:visibility="gone"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="@+id/btn_save"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
style="@style/Widget.AppCompat.Button.Borderless"
android:text="@string/text_btn_save"
android:textColor="@color/colorPrimary"/>
<Button
android:id="@+id/btn_cancel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
style="@style/Widget.AppCompat.Button.Borderless"
android:text="@string/text_btn_cancel"
android:textColor="@color/colorPrimary"/>
</LinearLayout>
</LinearLayout>
AlertDialog的Java代码:
package com.whitedeveloper.matrix.alerts;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import com.whitedeveloper.matrix.R;
import com.whitedeveloper.matrix.instance.SavingInstance;
public class AlertDialogSave extends Dialog {
public interface CallBackFromAlertDialogSave {
void callBack(String name);
}
private CallBackFromAlertDialogSave callBack;
private TextView tvError;
public AlertDialogSave(@NonNull Context context, CallBackFromAlertDialogSave callBack) {
super(context);
this.callBack = callBack;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.alert_dialog_name_saving);
init();
}
private void init() {
tvError = findViewById(R.id.tv_error);
final Button btnSave = findViewById(R.id.btn_save);
final Button btnCancel = findViewById(R.id.btn_cancel);
final EditText edtName = findViewById(R.id.edt_name_save);
edtName.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 (tvError.getVisibility() == View.VISIBLE)
tvError.setVisibility(View.GONE);
}
@Override
public void afterTextChanged(Editable editable) {
}
});
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (!edtName.getText().toString().trim().equals("")) {
if (SavingInstance.isNameExisted(getContext(), edtName.getText().toString())) {
if (tvError.getVisibility() == View.GONE) {
tvError.setVisibility(View.VISIBLE);
tvError.setText(R.string.text_existed_already);
}
return;
}
callBack.callBack(edtName.getText().toString());
hide();
dismiss();
} else
if (tvError.getVisibility() == View.GONE) {
tvError.setVisibility(View.VISIBLE);
tvError.setText(R.string.cannot_be_empty);
}
}
});
btnCancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
hide();
dismiss();
}
});
}
}
我不知道发生了什么事? 我哪里错了?请帮助:))
答案 0 :(得分:0)
您可以尝试设置无标题的自定义样式,因为我想空格是因为这个,请尝试以下操作:
在您的styles.xml
中创建对话框的自定义主题:
<style name="MyCustomTheme" parent="Theme.AppCompat.Light.Dialog.Alert">>
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">match_parent</item>
<item name="android:windowBackground">@null</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowIsFloating">false</item>
</style>
然后在您的AlertDialogSave
类中,将以下内容添加到您的构造函数中:
public AlertDialogSave(@NonNull Context context, CallBackFromAlertDialogSave callBack) {
super(context, R.style.MyCustomTheme);
this.callBack = callBack;
}
尝试一下,看看结果。
答案 1 :(得分:0)
我解决了这个奇怪的问题。 我发现我使用Dialog而不是AlertDialog。