权限：

布局

android:layout_width=”fill_parent”

android:layout_height=”fill_parent”

android:gravity=”center”

android:orientation=”vertical”>

android:id=”@+id/toggleButton1″

android:layout_width=”match_parent”

android:layout_height=”match_parent”

android:checked=”true”

android:text=”ToggleButton” />

源码

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);

//保持屏幕

}

@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(0xffffffff);

}

camera.setParameters(param);

}

@Override

protectedvoid onPause() {

//      camera.release();

//      Process.killProcess(Process.myPid());

super.onPause();

}

}