Android-该应用程序可能在其主线程上做了大量工作

Question

I am new programming with Android and I am having problems with a very simple example in ADT, I only have 2 ImageView in a FrameLayout each one, but when I test it with my phone the app goes really slow when it doesnt have any logic cause I didnt touch the java folder.

This is the error I get in

12-16 16:17:43.261 18238-18238/com.example.brank.acocinapp I/Choreographer: Skipped 64 frames!  The application may be doing too much work on its main thread.
12-16 16:17:44.781 18238-18248/com.example.brank.acocinapp W/art: Suspending all threads took: 26.044ms
12-16 16:17:44.831 18238-18238/com.example.brank.acocinapp W/PathParser: Points are too far apart 4.000000596046461

This is the xml of my content_main.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:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.example.brank.acocinapp.MainActivity">

    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/frameLayout2"
        android:layout_alignParentBottom="true">

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/imageView3"
            android:adjustViewBounds="true"
            android:src="@drawable/home2" />
    </FrameLayout>


    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/frameLayout"
        android:layout_alignParentTop="true">

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/imageView2"
            android:src="@drawable/home1"
            android:adjustViewBounds="true"/>

    </FrameLayout>


</RelativeLayout>

I have to mention that if I comment one of the two FrameLayout the problem doesnt exists. Thanks in advance.

EDIT: I also put the 2 images in the folder Drawable (I dont know if this affect) but I saw in a tutorial that I have to put the images in the subfolder in Drawable (mdpi, hdpi, xhdpi, xxhdpi) the thing is that this subfolders doesnt exists so I paste my images in the Drawable.

Answer 1

Ok what might be happening is that the OS is trying to do a lot of processing on your images, which you may have chosen of a high resolution. What you can do is try to create multiple resolution of your image (mdpi,hdpi,xhdpi,xxhdpi). you can take the standard size of the image as mdpi and increase their sizes in the ratio of 1.5,2,3 respectively for hdpi,xhdpi,xxhdpi. when you have these images put them in the drawable folders if you don't have them create them by yourself. Sometimes this may even cause OOM's in android. one article explaining it.

Answer 2

You should check the documentation for AsyncTask and Thread
There is also a very explanatory guide for Main Threads and Worker Threads

What is happening is that you perform a lot of cpu-consuming processes in the main thread which may cause your main UI thread to hang. A solution to this is to do the whole image processing in a worker thread and to keep the main thread only for the UI interaction.