如何在自定义警报对话框中设置文本？

Question

我一直在试图改变，其中通过自定义警告对话框充气programmatically.In我的应用程序的视图中的文本，在自定义布局中的文本应根据不同情况

我使用的setText（）试图改变，但没有任何反应。也没有错误。

这里是我的代码：

MainActivity.java

public class MainActivity extends AppCompatActivity { 
    Button button; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     button = (Button) findViewById(R.id.button); 

     button.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       LayoutInflater inflater = getLayoutInflater(); 
       View dialogLayout = inflater.inflate(R.layout.dialog, null); 
       TextView textView=(TextView)dialogLayout.findViewById(R.id.textView); 
       textView.setText("Changed"); 
       AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this); 
       builder.setView(R.layout.dialog); 
       textView.setText("Changed"); 


       builder.setTitle("sdfdsf"); 
       builder.setPositiveButton("OK",null).create() 
         .show(); 
     }}); 
    } 
} 

dialog.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:orientation="vertical" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <TextView 
     android:text="Course" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/textView" 
     android:textColor="@android:color/holo_red_light" 
     android:layout_marginTop="16dp" 
     app:layout_constraintTop_toTopOf="parent" 
     android:layout_marginStart="16dp" 
     app:layout_constraintLeft_toLeftOf="parent" /> 

    <TextView 
     android:text="Room" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/textView8" 
     android:textColor="@android:color/holo_red_light" 
     android:layout_below="@+id/textView2" 
     android:layout_alignStart="@+id/textView" /> 

    <TextView 
     android:text="Slot" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/textView2" 
     android:textColor="@android:color/holo_red_light" 
     android:layout_below="@+id/textView" 
     android:layout_alignStart="@+id/textView8" /> 

    <TextView 
     android:text="1205" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     tools:layout_editor_absoluteX="94dp" 
     android:id="@+id/textView4" 
     app:layout_constraintBaseline_toBaselineOf="@+id/textView8" 
     android:layout_alignBaseline="@+id/textView8" 
     android:layout_alignBottom="@+id/textView8" 
     android:layout_toEndOf="@+id/textView" 
     android:layout_marginStart="22dp" /> 

    <TextView 
     android:text="D" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     tools:layout_editor_absoluteX="81dp" 
     android:id="@+id/textView3" 
     app:layout_constraintBaseline_toBaselineOf="@+id/textView2" 
     android:layout_alignBottom="@+id/textView2" 
     android:layout_alignStart="@+id/textView4" /> 

    <TextView 
     android:text="Oops using C++" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     tools:layout_editor_absoluteX="94dp" 
     android:id="@+id/textView6" 
     app:layout_constraintBaseline_toBaselineOf="@+id/textView" 
     android:layout_alignBaseline="@+id/textView" 
     android:layout_alignBottom="@+id/textView" 
     android:layout_alignStart="@+id/textView3" /> 
</RelativeLayout> 

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context="com.knby.temp.MainActivity"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Hello World!" /> 

    <Button 
     android:text="Button" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentBottom="true" 
     android:layout_alignParentStart="true" 
     android:layout_marginStart="41dp" 
     android:layout_marginBottom="165dp" 
     android:id="@+id/button" /> 
</RelativeLayout> 

Answer 1

集

builder.setView(dialogLayout); 

代替

builder.setView(R.layout.dialog); 

找你设置布局的两倍。

Answer 2

您的验证码

AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this); 
builder.setView(R.layout.dialog); 

改成这样

AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this); 
builder.setView(dialogLayout); 

你必须加入这一行builder.setView(dialogLayout);代替本builder.setView(R.layout.dialog);

Answer 3

变化

LayoutInflater inflater = getLayoutInflater(); 

到

LayoutInflater inflater = LayoutInflater.from(context); 

Answer 4

只需使用你正在使用（对话框，AlertDialog，Dialog.Builder）什么都像这样：

Dialog dlog = new Dialog(this , your Theme) ; 
Dlog,setTitle("is this dialog ? ");