Android Universal Flashlight Code _android

A few days ago this side of a community power, black Ma Ma, a cat broke into the dormitory, frighten me into tears, and then decisively wrote a flashlight, the next power outage, again, I want to frighten it.

I saw a lot of people are directly call the flash, in fact, most of the models are not supported, I this is to use the camera function to achieve, most of the models are supported.

Mainactivity.class

public class Mainactivity extends fragmentactivity {@Override protected void onCreate (Bundle savedinstancestate) {
    Super.oncreate (savedinstancestate);
 
    Setcontentview (R.layout.activity_main); if (isflashsupported ()) {if (savedinstancestate = = null) {Getsupportfragmentmanager (). BeginTransaction (). A
      DD (R.id.container, New Flashlightfragment ()). commit ();
    } else {Shownoflashalert (); }} private void Shownoflashalert () {new Alertdialog.builder (this). Setmessage (R.string.device_not_supp ort_msg). SetIcon (Android. R.drawable.ic_dialog_alert). Settitle (R.string.device_not_support_title). Setpositivebutton (R.string.ok, New Dialo
            Ginterface.onclicklistener () {@Override public void OnClick (Dialoginterface dialog, int which) {
            Dialog.dismiss ();
          Finish ();
  ). Create (). Show (); Private Boolean isflashsupported () {Packagemanager pm = GEtpackagemanager ();
  Return Pm.hassystemfeature (Packagemanager.feature_camera_flash); public static class Flashlightfragment extends Fragment implements Surfaceholder.callback {public FLASHLIGHTF
    Ragment () {} ImageButton Btnswitch;
    ImageView BG;
 
    Private Boolean Islighon = false;
    Private Camera Camera;
 
    Camera.parameters params;
      @Override public void OnStart () {Super.onstart ();
      Surfaceview preview = (surfaceview) GetView (). Findviewbyid (R.id.preview);
      Surfaceholder Mholder = Preview.getholder ();
    Mholder.addcallback (this);
      @Override public void OnPause () {super.onpause ();
    Turnoffflash ();
      @Override public View Oncreateview (layoutinflater inflater, ViewGroup container, Bundle savedinstancestate) {
 
      View view = Inflater.inflate (R.layout.fragment_main_activity, container, false); Flash switch button Btnswitch = (ImageButton) View.findviewbyid (R.id.flasHlight_button);
 
      BG = (ImageView) View.findviewbyid (R.ID.FLASHLIGHT_BG);
 
      displaying button image togglebgimage ();
 
        Switch button click event to toggle Flash On/off btnswitch.setonclicklistener (new View.onclicklistener () {
          @Override public void OnClick (View v) {if (Islighon) {Turnoffflash ();
          else {turnonflash ();
 
      }
        }
      });
    return view;  }//turning on flash private void Turnonflash () {if (!islighon) {if (camera = = NULL | | params
        = = null) {return;
        } params = Camera.getparameters ();
        Params.setflashmode (Camera.Parameters.FLASH_MODE_TORCH);
        Camera.setparameters (params);
        Camera.startpreview ();
 
        Islighon = true;
      Togglebgimage (); }//turning off flash private void Turnoffflash () {if (Islighon) {if (camera = = NULL || ParAMS = null) {return;
        } params = Camera.getparameters ();
        Params.setflashmode (Camera.Parameters.FLASH_MODE_OFF);
        Camera.setparameters (params);
        Camera.stoppreview ();
 
        Islighon = false;
      Togglebgimage ();
      }} private void Togglebgimage () {if (Islighon) {bg.setimageresource (r.mipmap.f_on);
      else {bg.setimageresource (r.mipmap.f_off);
 
    @Override public void surfacechanged (surfaceholder holder, int format, int width, int height) {} @Override public void surfacedestroyed (Surfaceholder holder) {if (camera!= null) {CAMERA.STOPPR
        Eview ();
        Camera.setpreviewcallback (NULL);
        Camera.release ();
      camera = null; @Override public void surfacecreated (Surfaceholder holder) {if (camera = = null) {camera
        = Camera.open ();
        params = Camera.getparameters ();
    try {      Camera.setpreviewdisplay (holder);
          catch (IOException e) {camera.release ();
        camera = null;
    } turnonflash ();

 }
 
  }
 
 
}

Fragment_main_activity.xml

<relativelayout
  xmlns:android= "http://schemas.android.com/apk/res/android"
  android:layout_width= " Match_parent "
  android:layout_height=" match_parent "
  >
 
  <surfaceview
    android:id=" @+id/ PREVIEW "
    android:layout_width=" 1DP "
    android:layout_height=" 1DP "/>
 
  <imageview
    android: Id= "@+id/flashlight_bg"
    android:layout_width= "match_parent"
    android:layout_height= "Match_parent"
    android:src= "@mipmap/f_on"
    android:scaletype= "Centercrop"
    />
 
  <imagebutton
    Android:id= "@+id/flashlight_button"
    android:layout_width= "100DP"
    android:layout_height= "200DP"
    Android:layout_centerinparent= "true"
    android:background= "@android: color/transparent"
    android:text= " Fuck "/>
 
</RelativeLayout>

Activity_main.xml

<framelayout xmlns:android= "http://schemas.android.com/apk/res/android"
       android:id= "@+id/container"
       Android:layout_width= "Match_parent"
       android:layout_height= "match_parent"
       />

Androidmanifest.xml

<?xml version= "1.0" encoding= "Utf-8"?> <manifest xmlns:android= "http://schemas.android.com/apk/res/" Android "package=" Com.liujinghuiuncleapp.app.tool.flashlight "> <uses-permission android:name=" Android.permission.CAMERA "/> <uses-permission android:name=" Android.permission.FLASHLIGHT "/> <uses-fe Ature android:name= "Android.hardware.camera"/> <uses-feature android:name= "Android.hardware.camera.flash"/ > <application android:allowbackup= "true" android:icon= "@mipmap/ic_launcher" android:theme= "@style/A Pptheme "android:label=" @string/app_name "> <activity android:name=". Mainactivity "android:label=" @string/app_name "> <intent-filter> <action android:name=" and Roid.intent.action.MAIN "/> <category android:name=" Android.intent.category.LAUNCHER "/> </int
 ent-filter> </activity> </application> </manifest>

The above is the entire contents of this article, I hope you can enjoy.