first commit

app/src/main/java/com/juhabi/birds/dialog/LoadingDialog.kt

@@ -0,0 +1,41 @@
+package com.juhabi.birds.dialog
+
+import android.app.Dialog
+import android.content.Context
+import android.graphics.Color
+import android.graphics.drawable.ColorDrawable
+import android.os.Bundle
+import android.view.Gravity
+import android.view.Window
+import android.view.WindowManager
+import android.widget.TextView
+import com.juhabi.birds.R
+
+class LoadingDialog(
+    context: Context,
+    private val message: String = "加载中..."
+) : Dialog(context, R.style.LoadingDialogTheme) {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        requestWindowFeature(Window.FEATURE_NO_TITLE)
+        setContentView(R.layout.dialog_loading)
+        findViewById<TextView>(R.id.loadingText).text = message
+        window?.apply {
+            // 参考 Water：窗口全屏、内容居中，并为页面增加轻量半透明遮罩。
+            setBackgroundDrawable(ColorDrawable(Color.argb(13, 0, 0, 0)))
+            setGravity(Gravity.CENTER)
+            setDimAmount(0.2f)
+            addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
+            setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT)
+        }
+    }
+
+    override fun show() {
+        super.show()
+        window?.apply {
+            setGravity(Gravity.CENTER)
+            setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT)
+        }
+    }
+}