如何打开闪光灯，做照明用？

如何打开闪光灯，做照明用呢？
闪光灯肯定和相机有关，相机的函数里没有这个相关函数，
在acl这个库里找到相关函数，可是好像不起作用。

Android

开启闪光灯做手电筒



源码





权限：











<uses-permission android:name="android.permission.FLASHLIGHT" />









<uses-permission android:name="android.permission.WAKE_LOCK" />









<uses-permission android:name="android.permission.CAMERA" />

<uses-feature android:name="android.hardware.camera" />



布局



<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"









android:layout_width="fill_parent"









android:layout_height="fill_parent"









android:gravity="center"









androidrientation="vertical" >











<ToggleButton

















android:id="@+id/toggleButton1"

















android:layout_width="match_parent"

















android:layout_height="match_parent"

















android:checked="true"

















android:text="ToggleButton" />



</LinearLayout>



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 Activity implements OnClickListener {



private ToggleButton 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.main);







toggleButton = (ToggleButton) this.findViewById(R.id.toggleButton1);





toggleButton.setOnClickListener(this);











getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);





//

保持屏幕





}





@Override



public void onClick(View v) {





ToggleButton tb = (ToggleButton) v;





Camera.Parameters param = 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



protected void onPause() {

//



camera.release();

//



Process.killProcess(Process.myPid());





super.onPause();



}

}

camera1.FocusMode = "MACRO"

to yejian,camera 2.2版本的库没有这个属性，请问你是用哪个库的？