Android 开发 打开手电筒

Android 开发点击 ，开关手电筒

1.AndroidManifest.xml文件  权限

 <!-- 摄像头、手电筒 -->

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

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

 

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

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

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

2.代码中声明

private boolean isopent = false;

private Camera camera;//(import android.hardware.Camera;)

3.代码中点击

img_but.setOnClickListener(newView.OnClickListener() {

 

            @Override

            publicvoid onClick(View v) {

                // TODO Auto-generated method stub

                if(!isopent) {

           

                    camera = Camera.open();

                    Parameters params = camera.getParameters();

                    params.setFlashMode(Parameters.FLASH_MODE_TORCH);

                    camera.setParameters(params);

                    camera.startPreview(); // 开始亮灯

 

                    isopent = true;

                } else{

                    

                    camera.stopPreview(); // 关掉亮灯

                    camera.release(); // 关掉照相机

                    isopent = false;

                }

            }

        });