Android Project review (II)

Day two:

Task one: Set a fade effect on a screen

The effect of fading

Initanimation ();

private void Initanimation () {

TODO auto-generated method stubs

Alphaanimation alphaanimation = new Alphaanimation (0, 1);//Transparency

Alphaanimation.setduration (3000);//Set length

Rl_root.startanimation (alphaanimation);

}

private void Initui () {

TODO auto-generated method stubs

Tv_version_name = (TextView) Findviewbyid (r.id.tv_version_name);

Rl_root = (relativelayout) Findviewbyid (r.id.rl_root);

}

<relativelayout xmlns:android= "Http://schemas.android.com/apk/res/android"

Xmlns:tools= "Http://schemas.android.com/tools"

Android:layout_width= "Match_parent"

android:layout_height= "Match_parent"

android:background= "@drawable/LAUNCHER_BG"

Android:id= "@+id/rl_root"

Tools:context= ". Splashactivity ">

OK, configure the theme of the project

<!--application theme. -

<style name= "Apptheme" parent= "Appbasetheme" >

<!--all customizations that is not specific to a particular api-level can go. -

</style>

<!--<textview

android:text= "Feature List"

android:gravity= "Center"

Android:textsize= "20SP"

Android:textcolor= "#000"

Android:padding= "10DP"

Android:background= "#0f0"

Android:layout_width= "Match_parent"

android:layout_height= "Wrap_content"/>--

<style name= "TitleStyle" >

<item name= "Android:gravity" >center</item>

<item name= "Android:textsize" >20sp</item>

<item name= "Android:textcolor" > #000 </item>

<item name= "Android:padding" >10dp</item>

<item name= "Android:background" > #0f0 </item>

<item name= "Android:layout_width" >match_parent</item>

<item name= "Android:layout_height" >wrap_content</item>

</style>

<textview

style= "@style/titlestyle"

android:text= "Feature List"/>

A custom class that focuses on content for scrolling

Import Android.content.Context;

Import Android.util.AttributeSet;

Import Android.widget.TextView;

public class Focustextview extends TextView {

Use to create controls through Java code

Public Focustextview (Context context) {

Super (context);

}

Called by the system (with attribute + context environment constructs method XML to Java object)

Public Focustextview (context context, AttributeSet Attrs) {

Super (context, attrs);

}

Constructed by system call (with attribute + Context Environment construction method + layout file definition Style file construction method XML)

Public Focustextview (context context, AttributeSet attrs, int defstyle) {

Super (context, attrs, Defstyle);

}

This is the second method of overriding the method of getting focus, called by the system, when called by default to get focus, better than TextView

@Override

public Boolean isFocused () {

return true;

}

}

<com.example.moblesafe73.view.focustextview

Android:layout_width= "Match_parent"

android:layout_height= "Wrap_content"

Android:ellipsize= "Marquee"

android:marqueerepeatlimit= "Marquee_forever"

Android:padding= "5DP"

Android:singleline= "true"

Android:text= "Fall and Fall quietly, leave a little secret, ah ah ah ah ah oh ah ah ah oh ah ah ah ah ah oh yes oh oh oh oh

Android:textcolor= "#000" >

</com.example.moblesafe73.view.FocusTextView>

Start setting up nine grid

<?xml version= "1.0" encoding= "Utf-8"?>

<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"

Android:layout_width= "Match_parent"

android:layout_height= "Match_parent"

android:orientation= "Vertical"

android:gravity= "Center"

>

<imageview

Android:id= "@+id/iv_icon"

android:background= "@drawable/ic_launcher"

Android:layout_width= "Wrap_content"

android:layout_height= "Wrap_content"/>

<textview

Android:id= "@+id/tv_title"

android:text= "Module title"

Android:textsize= "18SP"

Android:layout_width= "Wrap_content"

android:layout_height= "Wrap_content"/>

</LinearLayout>

<gridview

Android:id= "@+id/gv_home"

Android:numcolumns= "3"

Android:verticalspacing= "10DP"

Android:layout_width= "Match_parent"

android:layout_height= "Match_parent" >

</GridView>

Import android.app.Activity;

Import android.content.Intent;

Import Android.os.Bundle;

Import Android.view.View;

Import Android.view.ViewGroup;

Import Android.widget.AdapterView;

Import Android.widget.AdapterView.OnItemClickListener;

Import Android.widget.BaseAdapter;

Import Android.widget.GridView;

Import Android.widget.ImageView;

Import Android.widget.TextView;

public class Homeactivity extends activity{

Private string[] mtitlestrs;

Private int[] Mdrawableids;

Private GridView Gv_home;

@Override

protected void OnCreate (Bundle savedinstancestate) {

Super.oncreate (savedinstancestate);

Setcontentview (R.layout.activity_home);

Initui ();

Methods for initializing data

InitData ();

}

private void InitData () {

Prepare data (Text (9 groups), picture (9 photos))

Mtitlestrs = new string[]{

"Mobile Burglar", "Communication Defender", "Software Management", "Process management", "traffic statistics", "Mobile antivirus", "Cache cleanup", "Advanced Tools", "Settings Center"

};

Mdrawableids = new int[]{

R.drawable.home_safe,r.drawable.home_callmsgsafe,

R.drawable.home_apps,r.drawable.home_taskmanager,

R.drawable.home_netmanager,r.drawable.home_trojan,

R.drawable.home_sysoptimize,r.drawable.home_tools,r.drawable.home_settings

};

Nine Gongge control set data adapter (equivalent to a ListView data adapter)

Gv_home.setadapter (New Myadapter ());

}

Class Myadapter extends baseadapter{

@Override

public int GetCount () {

Total number of entries number of text groups = = Picture Count

return mtitlestrs.length;

}

@Override

Public Object getItem (int position) {

return mtitlestrs[position];

}

@Override

public long getitemid (int position) {

return position;

}

@Override

Public View GetView (int position, View Convertview, ViewGroup parent) {

View view = View.inflate (Getapplicationcontext (), r.layout.gridview_item, NULL);

TextView Tv_title = (TextView) View.findviewbyid (r.id.tv_title);

ImageView Iv_icon = (ImageView) View.findviewbyid (R.id.iv_icon);

Tv_title.settext (Mtitlestrs[position]);

Iv_icon.setbackgroundresource (Mdrawableids[position]);

return view;

}

}

private void Initui () {

Gv_home = (GridView) Findviewbyid (r.id.gv_home);

}

}

Android Project review (II)