diff --git a/app/src/main/java/io/legado/app/ui/changecover/ChangeCoverDialog.kt b/app/src/main/java/io/legado/app/ui/changecover/ChangeCoverDialog.kt
new file mode 100644
index 000000000..ad94edb17
--- /dev/null
+++ b/app/src/main/java/io/legado/app/ui/changecover/ChangeCoverDialog.kt
@@ -0,0 +1,18 @@
+package io.legado.app.ui.changecover
+
+import android.util.DisplayMetrics
+import androidx.fragment.app.DialogFragment
+
+
+class ChangeCoverDialog : DialogFragment() {
+
+
+    override fun onStart() {
+        super.onStart()
+        val dm = DisplayMetrics()
+        activity?.windowManager?.defaultDisplay?.getMetrics(dm)
+        dialog?.window?.setLayout((dm.widthPixels * 0.9).toInt(), (dm.heightPixels * 0.9).toInt())
+    }
+
+
+}
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