Android 开启闪光灯做手电筒 源码

权限：

   <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" />

 

布局

<?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>

 

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();

    }

}