安卓開發利用閃光燈實現手電筒功能

安卓開發利用閃光燈實現手電筒功能

 

Main 類

public class Main extends Activity {

 

    private boolean isopent = false;

    private Camera camera;

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        View view = View.inflate(this, R.layout.main, null);

        setContentView(view);

        TextView img_but = (TextView) findViewById(R.id.main_img);

 

        img_but.setOnClickListener(new View.OnClickListener() {

 

            @Override

            public void onClick(View v) {

                // TODO Auto-generated method stub

                if (!isopent) {

                    Toast.makeText(getApplicationContext(), "您已經打開了手電筒", 0)

                            .show();

                    camera = Camera.open();

                    Parameters params = camera.getParameters();

                    params.setFlashMode(Parameters.FLASH_MODE_TORCH);

                    camera.setParameters(params);

                    camera.startPreview(); // 開始亮燈

 

                    isopent = true;

                } else {

                    Toast.makeText(getApplicationContext(), "關閉了手電筒",

                            Toast.LENGTH_SHORT).show();

                    camera.stopPreview(); // 關掉亮燈

                    camera.release(); // 關掉照相機

                    isopent = false;

                }

            }

        });

    }

 

}

佈局直接寫  上面給加點擊事件  用變量true 或者false來控制是關閉還是打開  很簡單的