Android Learning Notes

< one > Set fullscreen

1. Insert Requestwindowfeature (Window.feature_no_title) before Setcontentview () in the Oncreat method;//Cancel title bar

GetWindow (). SetFlags (Windowmanager.layoutparams. Flag_fullscreen,windowmanager.layoutparams. Flag_fullscreen);//Cancel status bar

Note: This method flashes the status bar after activating the activity and then fullscreen

2, in manifest configuration: <activity android:theme= "@android: Style/theme.notitlebar.fullscreen"/> Only in the current Activity display full screen

<application android:theme= "@android: Style/theme.notitlebar.fullscreen"/> Configure full-screen display for the entire app

3,/** * Full Screen switch * *

public void Fullscreenchange () {

Sharedpreferences mpreferences = preferencemanager.getdefaultsharedpreferences (this);

Boolean fullscreen = Mpreferences.getboolean ("fullscreen", false);

Windowmanager.layoutparams attrs = GetWindow (). GetAttributes ();

System.out.println ("fullscreen value:" + fullscreen);

if (fullscreen) {

Attrs.flags &= (~windowmanager.layoutparams.flag_fullscreen);

GetWindow (). SetAttributes (Attrs);

Cancel Full Screen settings

GetWindow (). Clearflags (WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);

Mpreferences.edit (). Putboolean ("fullscreen", false). commit ();

} else {

Attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;

GetWindow (). SetAttributes (Attrs);

GetWindow (). Addflags (WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);

Mpreferences.edit (). Putboolean ("fullscreen", true). commit ();

}

}

< two >activity Jump pass value

With intent

Mainactivity

Intent in = new Intent (mainactivity.this,toactivity.class);
Bundle Bu = new bundle ();//vector of multiple values
Bu.putstring ("Name", str);
In.putextras (Bu);
StartActivity (in);

Toactivity

Bundle bundle = This.getintent (). Getextras ();

T2= (TextView) Findviewbyid (R.id.helloview);

　　　　/* Get data from bundles, note types and key*/

String name = bundle.getstring ("name");

< three >tabhost

Tabhost tabhost = (tabhost) Findviewbyid (r.id.tabhost);
Tabhost.setup ();
Tabhost.addtab (Tabhost.newtabspec ("Tab1"). Setindicator ("Tab1"). SetContent (R.id.view1));
Tabhost.addtab (Tabhost.newtabspec ("TaB2"). Setindicator ("Tab2"). SetContent (R.ID.VIEW2));
Tabhost.addtab (Tabhost.newtabspec ("Tab3"). Setindicator ("Tab3"). SetContent (R.ID.VIEW3));

XML layout file

<?xml version= "1.0" encoding= "Utf-8"?>
<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"
Android:id= "@+id/hometabs"
Android:layout_width= "Fill_parent"
android:layout_height= "Fill_parent"
android:orientation= "Vertical" >

<tabhost
Android:id= "@+id/tabhost"
Android:layout_width= "Match_parent"
android:layout_height= "Wrap_content" >

<linearlayout
Android:layout_width= "Fill_parent"
android:layout_height= "Fill_parent"
android:orientation= "Vertical" >

<framelayout
Android:id= "@android: Id/tabcontent"
Android:layout_width= "Match_parent"
android:layout_height= "Wrap_content" >

<textview
Android:id= "@+id/view1"
Android:layout_width= "Fill_parent"
android:layout_height= "Fill_parent"
android:text= "First label"/>

<textview
android:id= "@+id/view2"
Android : layout_width= "fill_parent"
android:layout_height= "Fill_parent"
An droid:text= "Second label"/>

<textview
android:id= "@+id/view3"
Android : layout_width= "fill_parent"
android:layout_height= "Fill_parent"
An droid:text= "Third label"/>
</framelayout>

<relativelayout
An Droid:layout_width= "Match_parent"
android:layout_height= "match_parent" >
< Tabwidget
android:id= "@android: Id/tabs"
android:layout_width= "match_parent "
android:layout_height=" wrap_content "
android:layout_alignparentbottom=" t Rue "
</tabwidget>
</relativelayout>

</linearlayout
</tabhost>
</linearlayout>