androidmanifest.xml文件解析属性条目

Question

I am new to Android and started with hello world app.

I was going through AndroidManifest.xml

   <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
    </application>

I am trying to figure out where is this ic_launcher file located or has some variable mapped.

I have folder as

res/drawable-hdpi
res/drawable-ldpi

I can see all folder has ic_launcher.png file, now my question is from which folder it will pick this image. Also, I saw there is one entry in R.java file for this name as,

public static final class drawable {
    public static final int ic_launcher=0x7f020000;
}

What is the relation between entry in R.java and AndroidManifest.xml.

Also, second line is android:label="@string/app_name" I can see in strings.xml file, there is one entry for these,

  <string name="app_name">MyMapLocation</string>

Now, where it is written in AndroidManifest.xml file(or any other place) that go and check for app_name variable entry in strings.xml file?

I am sorry to ask this basic question but want to clear doubts.

Answer 1

Question is, from which folder it will pick this(ic_launcher.img) image.

It will depend on the screen size of the device, if screen size comes in LDPI icon.img of drawable-ldpi would be picked up by system at run time.

Now, where it is written in AndroidManifest.xml file(or any other place) that go and check for app_name variable entry in strings.xml file?

@string/app_name >> @string tells xml files that go to string.xml and search for app_name there.

Edit:- here is what docs says about accessing resouces via Blad0rz