Enable flashlight for Android source code

Permission:

<Uses-permissionandroid: Name = "android. Permission. Flashlight"/>

<Uses-permissionandroid: Name = "android. Permission. wake_lock"/>

<Uses-Permission Android: Name = "android. Permission. Camera"/>

<Uses-featureandroid: Name = "android. Hardware. Camera"/>

 

Layout

<? XML version = "1.0" encoding = "UTF-8"?>

<Linearlayoutxmlns: Android = "http://schemas.android.com/apk/res/android"

Android: layout_width = "fill_parent"

Android: layout_height = "fill_parent"

Android: gravity = "center"

Android: Orientation = "vertical">

 

<Togglebutton

Android: Id = "@ + ID/togglebutton1"

Android: layout_width = "match_parent"

Android: layout_height = "match_parent"

Android: checked = "true"

Android: text = "togglebutton"/>

 

</Linearlayout>

 

Source code

Package CN. Lee. handlight;

 

Import Android. App. activity;

Import Android. Hardware. camera;

Import Android. Hardware. Camera. parameters;

Import Android. OS. Bundle;

Import Android. OS. process;

Import Android. View. view;

Import Android. View. View. onclicklistener;

Import Android. View. windowmanager;

Import Android. widget. togglebutton;

 

Public class handlightactivity extends activityimplements onclicklistener {

Privatetogglebutton togglebutton;

 

Privatecamera camera = camera. open ();

/** Called when the activity is first created .*/

@ Override

Publicvoid oncreate (bundle savedinstancestate ){

Super. oncreate (savedinstancestate );

Setcontentview (R. layout. Main );

 

Togglebutton = (togglebutton) This. findviewbyid (R. Id. togglebutton1 );

Togglebutton. setonclicklistener (this );

Getwindow (). addflags (windowmanager. layoutparams. flag_keep_screen_on );

// Keep the screen

}

 

@ Override

Publicvoid onclick (view v ){

Togglebuttontb = (togglebutton) V;

Camera. parametersparam = camera. getparameters ();

If (! TB. ischecked ()){

Param. setflashmode (camera. Parameters. flash_mode_torch );

Togglebutton. setbackgroundcolor (0x30ffffff );

} Else {

Param. setflashmode (camera. Parameters. flash_mode_off );

Togglebutton. setbackgroundcolor (0 xffffffff );

}

Camera. setparameters (PARAM );

}

 

@ Override

Protectedvoid onpause (){

// Camera. Release ();

// Process. killprocess (process. mypid ());

Super. onpause ();

}

}