Android Development-----------Flashlight Improved version

On the basis of the previous

Under the Res folder: Add a Drawable/local_me.xml

Localme_cml

<selector xmlns:android= "Http://schemas.android.com/apk/res/android" >    <item android:state_checked= " True "        android:drawable=" @drawable/on "/> <!--pressed-to    <item android:drawable=" @drawable/off "/> <!--default/unchecked--></selector>

Main program:

Package Com.example.handlightactivity;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; /** * * @author Love * * Principle: * is by clicking the button, * when the button is clicked to open the flash. * Turn off the flash when the button is off * * * */public class Mainactivity extends Activity implements Onclicklistener {private Toggl        Ebutton ToggleButton;      Private Camera camera = Camera.open (); /** called when the activity is first created.          */@Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);            Setcontentview (R.layout.activity_main);          ToggleButton = (ToggleButton) This.findviewbyid (R.id.togglebutton1);                    Togglebutton.setonclicklistener (this); Keep the screen GetWindow (). AddfLags (WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);          } @Override public void OnClick (View v) {ToggleButton TB = (ToggleButton) v;          Camera.parameters param = camera.getparameters ();            if (!tb.ischecked ()) {//Open the camera flash!              Param.setflashmode (Camera.Parameters.FLASH_MODE_TORCH);  Togglebutton.setbackgroundcolor (0X30FFFFFF);        On open on.jpg tb.setbackgrounddrawable (getresources (). getdrawable (R.drawable.on));              }else{Param.setflashmode (Camera.Parameters.FLASH_MODE_OFF); Togglebutton.setbackgroundcolor (0xFFFFFFFF);        Off Open the Off.jpg tb.setbackgrounddrawable (Getresources (). getdrawable (R.drawable.off));      } camera.setparameters (param);  } @Override protected void OnPause () {//Camera.release ();          Process.killprocess (Process.mypid ());      Super.onpause (); }  }

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