[英]Custom alert dialog not showing with no errors in code
我正在嘗試創建一個自定義警報對話框,但即使認為沒有顯示錯誤,也無法顯示它。 它用於帶有按鈕選擇和按鈕上傳的名稱文本框。 當我單擊主頁上的浮動操作按鈕時,我試圖打開它。 我不確定我到底做錯了什么,因為一切都沒有顯示任何錯誤。
這是我的 add_new_menu_layout.xml 文件
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardElevation="4dp">
<LinearLayout
android:layout_margin="20dp"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/edit_Name"
android:hint="Name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColorHint="@color/colorPrimary"
android:text=""
android:textColor="@color/colorPrimary"
android:textSize="34sp"
android:inputType="textPassword"
app:met_baseColor="@color/colorPrimary"
app:met_floatingLabel="highlight"
app:met_primaryColor="@color/colorPrimary"
app:met_singleLineEllipsis="true"
/>
<LinearLayout
android:weightSum="2"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/btn_select"
android:text="SELECT"
android:textColor="@android:color/white"
android:layout_marginRight="8dp"
android:layout_marginLeft="8dp"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:color="@color/colorPrimary"
android:shadowColor="@android:color/black" />
<Button
android:id="@+id/btn_upload"
android:text="UPLOAD"
android:textColor="@android:color/white"
android:layout_marginEnd="8dp"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:color="@color/colorPrimaryDark"
android:shadowColor="@android:color/black" />
</LinearLayout>
</LinearLayout>
這是我主頁上的代碼。
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showDialog();
}
});
private void showDialog() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(Home.this);
alertDialog.setTitle("Add new Category");
alertDialog.setMessage("Please fill full information");
LayoutInflater inflater = this.getLayoutInflater();
View add_menu_layout = inflater.inflate(R.layout.add_new_menu_layout,null);
editName = add_menu_layout.findViewById(R.id.edit_Name);
btnSelect = add_menu_layout.findViewById(R.id.btn_select);
btnUpload = add_menu_layout.findViewById(R.id.btn_upload);
alertDialog.setView(add_menu_layout);
alertDialog.setIcon(R.drawable.ic_shopping_cart);
alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
alertDialog.show();
}
您需要確保此代碼:
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showDialog();
}
});
在單擊此按鈕之前已在某處執行/執行。 放置此代碼的一個好地方是您活動的onCreate
方法。
完整代碼:
public class Home extends Activity {
private EditText editName;
private Button btnSelect;
private Button btnUpload;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showDialog();
}
});
}
private void showDialog() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(Home.this);
alertDialog.setTitle("Add new Category");
alertDialog.setMessage("Please fill full information");
LayoutInflater inflater = this.getLayoutInflater();
View add_menu_layout = inflater.inflate(R.layout.add_new_menu_layout,null);
editName = add_menu_layout.findViewById(R.id.edit_Name);
btnSelect = add_menu_layout.findViewById(R.id.btn_select);
btnUpload = add_menu_layout.findViewById(R.id.btn_upload);
alertDialog.setView(add_menu_layout);
alertDialog.setIcon(R.drawable.ic_shopping_cart);
alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
alertDialog.show();
}
}
結果:
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