The difference between Android layout_gravity, Gravity, Layout_margin, padding

<linearlayout        android:layout_width= "wrap_content"        android:layout_height= "Wrap_content"         Android : orientation= "Horizontal"        >        <imageview            android:layout_width= "Wrap_content"            android: layout_height= "Wrap_content"             android:src= "@drawable/ic_launcher"            />        <textview            android: text= "mobile phone anti-theft"            android:layout_width= "wrap_content"            android:layout_height= "wrap_content"/> </    Linearlayout>

  <LinearLayout>

<linearlayout        android:layout_width= "wrap_content"        android:layout_height= "Wrap_content"         android: Layout_gravity= "Center_horizontal"     <!--------------------->        android:orientation= "Horizontal"        >        <imageview            android:layout_width= "wrap_content"            android:layout_height= "Wrap_content"             android:src= "@drawable/ic_launcher"            />        <textview            android:text= "mobile phone anti-theft"            Android: Layout_width= "Wrap_content"            android:layout_height= "wrap_content"/>    </LinearLayout>
<LinearLayout>

android:layout_gravity= "Center_horizontal" layout represents the relative parent control, the child control changes, and the gravity represents the content _center_horizontal

<LinearLayout>   
<linearlayout        android:layout_width= "wrap_content"        android:layout_height= "Wrap_content"         android: Layout_gravity= "Center_horizontal"        android:gravity= "center_vertical"        android:orientation= "Horizontal"        >        <imageview            android:layout_width= "wrap_content"            android:layout_height= "Wrap_content"             android:src= "@drawable/ic_launcher"            />        <textview            android:text= "mobile phone anti-theft"            Android: Layout_width= "Wrap_content"            android:layout_height= "wrap_content"/>    </LinearLayout>
<LinearLayout>

Android:gravity= "center_vertical" Gravity relative to the content center_vertical, 1) If there is content on the button, then the content center_vertical

2) If there is a control under LinearLayout, then the control under LinearLayout center_vertical

<linearlayout        android:layout_width= "wrap_content"        android:layout_height= "Wrap_content"         android: Layout_gravity= "Center_horizontal"        android:gravity= "center_vertical"        android:layout_margin= "50DP        " android:orientation= "Horizontal"        >        <imageview            android:layout_width= "Wrap_content"            android:layout_height= "Wrap_content"             android:src= "@drawable/ic_launcher"            />        <textview            android:text= "mobile phone anti-theft"            android:layout_width= "wrap_content"            android:layout_height= "wrap_content"/ >    </LinearLayout>
<LinearLayout>

android:layout_margin= "50DP" layout: Represents the relative parent control, and the child control changes. Margin: Represents the margin.

Layout_margin represents the margin with the parent control

<linearlayout        android:layout_width= "wrap_content"        android:layout_height= "Wrap_content"         android: Layout_gravity= "Center_horizontal"        android:gravity= "center_vertical"        android:layout_margin= "50DP        " android:orientation= "Horizontal"        android:padding= "70DP"        >        <imageview            android:layout_ Width= "Wrap_content"            android:layout_height= "wrap_content"             android:src= "@drawable/ic_launcher"            / >        <textview            android:text= "mobile phone anti-theft"            android:layout_width= "wrap_content"            android:layout_ height= "Wrap_content"/>    </LinearLayout>
<LinearLayout>

Android:padding= "70DP" indicates content padding

The difference between Android layout_gravity, Gravity, Layout_margin, padding