Dialog从0到1

<resources xmlns:tools="http://schemas.android.com/tools">

    <!-- dialog样式 -->
    <style name="DialogTheme" parent="@android:style/Theme.Dialog">
        <!-- 边框 -->
        <item name="android:windowFrame">@null</item>
        <!-- 是否浮现在activity之上 -->
        <item name="android:windowIsFloating">true</item>
        <!-- 半透明 -->
        <item name="android:windowIsTranslucent">true</item>
        <!-- 无标题 -->
        <item name="android:windowNoTitle">true</item>
        <item name="android:background">@android:color/transparent</item>
        <!-- 背景透明 -->
        <item name="android:windowBackground">@android:color/transparent</item>
        <!-- 模糊 -->
        <item name="android:backgroundDimEnabled">true</item>
        <!-- 遮罩层 -->
        <item name="android:backgroundDimAmount">0.5</item>
    </style>

</resources>

<resources xmlns:tools="http://schemas.android.com/tools">

    <style name="DialogTheme" parent="@android:style/Theme.DeviceDefault.Light.Dialog">
      <item name="android:windowFrame">@null</item><!-- 边框 -->
      <item name="android:windowIsFloating">true</item><!-- 是否浮现在activity之上 -->
      <item name="android:windowIsTranslucent">true</item><!-- 半透明 -->
      <item name="android:windowNoTitle">true</item><!-- 无标题 -->
      <item name="android:backgroundDimEnabled">false</item><!-- 背景模糊 -->
      <item name="android:windowBackground">@android:color/transparent</item><!-- 背景色 -->
  </style>
    
</resources>

// 样式一
Dialog dialog = new Dialog(context, R.style.DialogTheme);

// 样式二
AlertDialog dialog = new AlertDialog.Builder(activity,R.style.DialogTheme).setView(view).show();

// 设置不可点击dialog以外的取余
dialog.setCanceledOnTouchOutside(false);

// dialog去掉头部标题栏（去掉标题栏这句一定要写在setContentView()方法的前面，不然会报错）
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);

// dialog设置居中显示
dialog.getWindow().setGravity(Gravity.CENTER);

// 原因是dialog里面也是有头部标题栏存在的，去掉头部标题栏，再设置居中显示即可
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
Window mWindow = dialog.getWindow();
mWindow.setGravity(Gravity.CENTER);

dialog.getWindow().getAttributes().x = 25;

if (myDataList.size() == 1) {
  dialog.getWindow().setLayout(600, 600);
} else {
  dialog.getWindow().setLayout(600, 900);
}

dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
  @Override
  public void onCancel(DialogInterface dialog) {
    imageView.setVisibility(View.VISIBLE);
    textView.setVisibility(View.VISIBLE);
  }
});

AlertDialog.Builder builder = new AlertDialog.Builder(myContext);
builder.setMessage("初始化失败，请重试");
builder.setPositiveButton("重试", new DialogInterface.OnClickListener() {
  @Override
  public void onClick(DialogInterface dialog, int which) {
    dialog.dismiss();
    init();
  }
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
  @Override
  public void onClick(DialogInterface dialog, int which) {
    dialog.dismiss();
    finish();
  }
});
builder.show();

  public static void showDialog(Activity activity) {
        if (myDataList == null) {
            return;
        }
        View view = activity.getLayoutInflater().inflate(R.layout.my_dialog, null);
        AlertDialog dialog = new AlertDialog.Builder(activity, R.style.DialogTheme).setView(view).show();
        dialog.setCanceledOnTouchOutside(false);
        if (dialog.getWindow() == null) {
            return;
        }
        dialog.getWindow().setGravity(Gravity.CENTER);
        if (myDataList.size() == 1) {
            dialog.getWindow().setLayout(600, 600);
        } else {
            dialog.getWindow().setLayout(600, 900);
        }
        ImageView close = view.findViewById(R.id.iv_close);
        TextView name = view.findViewById(R.id.tv_name);
        ListView lvData = view.findViewById(R.id.lv_data);

        close.setOnClickListener(v -> {
            dialog.dismiss();
        });

        // 按照序号排序
        myDataList.sort(Comparator.comparing(MyData::getNum));

        name.setText(myDataList.get(0).getName());
        UserInfoAdapter userInfoAdapter = new UserInfoAdapter(activity, myDataList);
        lvData.setAdapter(userInfoAdapter);
    }