简易android手电筒app

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package

com.syl.flashlight;

import

android.hardware.Camera;

import

android.hardware.Camera.Parameters;

import

android.os.Bundle;

import

android.app.Activity;

import

android.view.Menu;

import

android.view.View;

import

android.view.View.OnClickListener;

import

android.widget.Button;

public

class
MainActivity extends

Activity {

    private

Button open;

    private

Button close;

    private

Camera camera;

    private

boolean
isopen = false;

    @Override

    protected

void
onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        open
= (Button)findViewById(R.id.openBT);

        close
= (Button)findViewById(R.id.closeBT);

        open.setOnClickListener(new

MyOnClickListener());

        close.setOnClickListener(new

MyOnClickListener());

    }

    private

class
MyOnClickListener implements

OnClickListener {

        @Override

        public

void
onClick(View v) {

            //
TODO Auto-generated method stub

            switch(v.getId())
{

            case

R.id.openBT:

                camera
= Camera.open();

                Parameters
params = camera.getParameters();

                params.setFlashMode(Parameters.FLASH_MODE_TORCH);

                camera.setParameters(params);

                camera.startPreview();                 


                break;

            case

R.id.closeBT:

                camera.stopPreview();

                camera.release();

                break;

            }

        }

    }

}