如何在Android警报对话框中显示列表视图？

Question

在Android应用程序中,我想在AlertDialog中显示自定义列表视图.

我怎样才能做到这一点？

Answer 1

在代码下方使用,以在AlertDialog中显示自定义列表

AlertDialog.Builder builderSingle = new AlertDialog.Builder(DialogActivity.this);
builderSingle.setIcon(R.drawable.ic_launcher);
builderSingle.setTitle("Select One Name:-");

final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(DialogActivity.this, android.R.layout.select_dialog_singlechoice);
arrayAdapter.add("Hardik");
arrayAdapter.add("Archit");
arrayAdapter.add("Jignesh");
arrayAdapter.add("Umang");
arrayAdapter.add("Gatti");

builderSingle.setNegativeButton("cancel", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });

builderSingle.setAdapter(arrayAdapter, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                String strName = arrayAdapter.getItem(which);
                AlertDialog.Builder builderInner = new AlertDialog.Builder(DialogActivity.this);
                builderInner.setMessage(strName);
                builderInner.setTitle("Your Selected Item is");
                builderInner.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog,int which) {
                                dialog.dismiss();
                            }
                        });
                builderInner.show();
            }
        });
builderSingle.show();

Answer 2

根据文档,有三种列表可用于AlertDialog:

1. 传统的单选清单
2. 持久性单选列表(单选按钮)
3. 持久性多选列表(复选框)

我将举一个下面的例子.

传统的单选清单

制作传统单选列表的方法是使用setItems.

// setup the alert builder
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Choose an animal");

// add a list
String[] animals = {"horse", "cow", "camel", "sheep", "goat"};
builder.setItems(animals, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        switch (which) {
            case 0: // horse
            case 1: // cow
            case 2: // camel
            case 3: // sheep
            case 4: // goat
        }
    }
});

// create and show the alert dialog
AlertDialog dialog = builder.create();
dialog.show();

不需要OK按钮,因为只要用户点击列表项控件就会返回到OnClickListener.

单选按钮列表

单选按钮列表优于传统列表的优点是用户可以看到当前设置是什么.制作单选按钮列表的方法是使用setSingleChoiceItems.

// setup the alert builder
val builder = AlertDialog.Builder(context)
builder.setTitle("Choose an animal")

// add a list
val animals = arrayOf("horse", "cow", "camel", "sheep", "goat")
builder.setItems(animals) { dialog, which ->
    when (which) {
        0 -> { /* horse */ }
        1 -> { /* cow   */ }
        2 -> { /* camel */ }
        3 -> { /* sheep */ }
        4 -> { /* goat  */ }
    }
}

// create and show the alert dialog
val dialog = builder.create()
dialog.show()

我在这里对所选项进行了硬编码,但您可以在实际项目中使用类成员变量跟踪它.

复选框列表

制作复选框列表的方法是使用setMultiChoiceItems.

// setup the alert builder
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Choose an animal");

// add a radio button list
String[] animals = {"horse", "cow", "camel", "sheep", "goat"};
int checkedItem = 1; // cow
builder.setSingleChoiceItems(animals, checkedItem, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        // user checked an item
    }
});

// add OK and Cancel buttons
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        // user clicked OK
    }
});
builder.setNegativeButton("Cancel", null);

// create and show the alert dialog
AlertDialog dialog = builder.create();
dialog.show();

在这里,我硬编码了已经检查过列表中的哪些项目.你更有可能想要跟踪它们ArrayList<Integer>.有关详细信息,请参阅文档示例.null如果您始终希望所有内容都未选中,您也可以将选中的项目设置为.

笔记

• 对于context上面的代码,请不要使用getApplicationContext()或者您将获得IllegalStateException(请参阅此处了解原因).相反,获取对活动上下文的引用,例如with this.
• 您也可以使用从填充数据库或其他来源列表中的项目setAdapter或setCursor或传递一个Cursor或ListAdapter成setSingleChoiceItems或setMultiChoiceItems.
• 如果列表长于屏幕上适合的列表,则对话框将自动滚动它.但是,如果你有一个很长的列表,我猜你应该用RecyclerView创建一个自定义对话框.

• 为了测试上面的所有例子,我只有一个简单的项目,只有一个按钮,而不是在点击时显示对话框:

  // setup the alert builder
  val builder = AlertDialog.Builder(context)
  builder.setTitle("Choose an animal")
  
  // add a radio button list
  val animals = arrayOf("horse", "cow", "camel", "sheep", "goat")
  val checkedItem = 1 // cow
  builder.setSingleChoiceItems(animals, checkedItem) { dialog, which ->
      // user checked an item
  }
  
  
  // add OK and Cancel buttons
  builder.setPositiveButton("OK") { dialog, which ->
      // user clicked OK
  }
  builder.setNegativeButton("Cancel", null)
  
  // create and show the alert dialog
  val dialog = builder.create()
  dialog.show()
  

有关

• 带有一个,两个和三个按钮的Android Alert对话框
• 如何实现自定义AlertDialog视图

Answer 3

您可以使用自定义对话框.

定制对话框布局. list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
    <ListView
        android:id="@+id/lv"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"/>
</LinearLayout>

在你的活动中

Dialog dialog = new Dialog(Activity.this);
       dialog.setContentView(R.layout.list)

ListView lv = (ListView ) dialog.findViewById(R.id.lv);
dialog.setCancelable(true);
dialog.setTitle("ListView");
dialog.show();

编辑:

使用alertdialog

String names[] ={"A","B","C","D"};
AlertDialog.Builder alertDialog = new AlertDialog.Builder(MainActivity.this);
LayoutInflater inflater = getLayoutInflater();
View convertView = (View) inflater.inflate(R.layout.custom, null);
alertDialog.setView(convertView);
alertDialog.setTitle("List");
ListView lv = (ListView) convertView.findViewById(R.id.lv);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,names);
lv.setAdapter(adapter);
alertDialog.show();

custom.xml

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/listView1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

</ListView>

快照

Answer 4

final CharSequence[] items = {"A", "B", "C"};

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Make your selection");
builder.setItems(items, new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int item) {
        // Do something with the selection
        mDoneButton.setText(items[item]);
    }
});
AlertDialog alert = builder.create();
alert.show();

Answer 5

使用" import android.app.AlertDialog;"导入然后编写

    String[] items = {"...","...."};             
    AlertDialog.Builder build = new AlertDialog.Builder(context);
    build.setItems(items, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            //do stuff....
        }
    }).create().show();

Answer 6

这是如何使用自定义列表项显示自定义布局对话框，可以根据您的要求进行自定义。

步骤 - 1 创建 DialogBox 的布局，即：-

R.layout.assignment_dialog_list_view

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/rectangle_round_corner_assignment_alert"
    android:orientation="vertical">
    <TextView
        android:id="@+id/tv_popup_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:singleLine="true"
        android:paddingStart="4dp"
        android:text="View as:"
        android:textColor="#4f4f4f" />

    <ListView
        android:id="@+id/lv_assignment_users"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />
</LinearLayout>

步骤 - 2 根据您的业务逻辑创建自定义列表项布局

R.layout.item_assignment_dialog_list_layout

<?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:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:padding="4dp"
    android:orientation="horizontal">
    <ImageView
        android:id="@+id/iv_user_profile_image"
        android:visibility="visible"
        android:layout_width="42dp"
        android:layout_height="42dp" />
    <TextView
        android:id="@+id/tv_user_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="8dp"
        android:layout_marginStart="8dp"
        android:paddingBottom="8dp"
        android:textColor="#666666"
        android:textSize="18sp"
        tools:text="ABCD XYZ" />
</LinearLayout>

步骤 - 3 创建您自己选择的数据模型类

public class AssignmentUserModel {

private String userId;
private String userName;
private String userRole;
private Bitmap userProfileBitmap;

public AssignmentUserModel(String userId, String userName, String userRole, Bitmap userProfileBitmap) {
    this.userId = userId;
    this.userName = userName;
    this.userRole = userRole;
    this.userProfileBitmap = userProfileBitmap;
}


public String getUserId() {
    return userId;
}

public void setUserId(String userId) {
    this.userId = userId;
}

public String getUserName() {
    return userName;
}

public void setUserName(String userName) {
    this.userName = userName;
}

public String getUserRole() {
    return userRole;
}

public void setUserRole(String userRole) {
    this.userRole = userRole;
}

public Bitmap getUserProfileBitmap() {
    return userProfileBitmap;
}

public void setUserProfileBitmap(Bitmap userProfileBitmap) {
    this.userProfileBitmap = userProfileBitmap;
}

}

STEP - 4 创建自定义适配器

public class UserListAdapter extends ArrayAdapter<AssignmentUserModel> {
private final Context context;
private final List<AssignmentUserModel> userList;
   
public UserListAdapter(@NonNull Context context, int resource, @NonNull List<AssignmentUserModel> objects) {
    super(context, resource, objects);
    userList = objects;
    this.context = context;
 }

@SuppressLint("ViewHolder")
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View rowView = inflater.inflate(R.layout.item_assignment_dialog_list_layout, parent, false);
    ImageView profilePic = rowView.findViewById(R.id.iv_user_profile_image);
    TextView userName = rowView.findViewById(R.id.tv_user_name);
    AssignmentUserModel user = userList.get(position);

    userName.setText(user.getUserName());

    Bitmap bitmap = user.getUserProfileBitmap();

    profilePic.setImageDrawable(bitmap);

    return rowView;
}

}

STEP - 5 创建此函数并在此方法中提供上述数据模型的 ArrayList

// Pass list of your model as arraylist
private void showCustomAlertDialogBoxForUserList(ArrayList<AssignmentUserModel> allUsersList) {
        final Dialog dialog = new Dialog(mActivity);
        dialog.setContentView(R.layout.assignment_dialog_list_view);
        if (dialog.getWindow() != null) {
            dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); // this is optional
        }
        ListView listView = dialog.findViewById(R.id.lv_assignment_users);
        TextView tv = dialog.findViewById(R.id.tv_popup_title);
        ArrayAdapter arrayAdapter = new UserListAdapter(context, R.layout.item_assignment_dialog_list_layout, allUsersList);
        listView.setAdapter(arrayAdapter);
        listView.setOnItemClickListener((adapterView, view, which, l) -> {
            Log.d(TAG, "showAssignmentsList: " + allUsersList.get(which).getUserId());
           // TODO : Listen to click callbacks at the position
        });
        dialog.show();
    }

步骤 - 6 为对话框提供圆角背景

@drawable/rectangle_round_corner_assignment_alert

    <?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#ffffffff" />
    <corners android:radius="16dp" />
    <padding
        android:bottom="16dp"
        android:left="16dp"
        android:right="16dp"
        android:top="16dp" />
</shape>

Answer 7

这太简单了

final CharSequence[] items = {"Take Photo", "Choose from Library", "Cancel"};

AlertDialog.Builder builder = new AlertDialog.Builder(MyProfile.this);

builder.setTitle("Add Photo!");
builder.setItems(items, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int item) {
        if (items[item].equals("Take Photo")) {
            getCapturesProfilePicFromCamera();
        } else if (items[item].equals("Choose from Library")) {
            getProfilePicFromGallery();
        } else if (items[item].equals("Cancel")) {
            dialog.dismiss();
        }
    }
});
builder.show();