Android-开启闪光灯作为手电筒

1、首先，肯定不能忘记添加权限

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

2、直接粘贴源码

public class MainActivity extends Activity {

    private Button openLight;  
    private boolean status = false;  
    private Camera camera;  
    private Parameters parameters;  
    private MainActivity instance; 

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
instance = this;  
        camera = Camera.open();  
        openLight = (Button)findViewById(R.id.openLight);  
        openLight.setOnClickListener(new OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                if (!status) {  
                    openLight.setText("关闭");  
                    status = true;  
                    new Thread(new TurnOnLight()).start();  
                }else {  
                    status = false;  
                    openLight.setText("打开");  
                    instance.parameters.setFlashMode("off");  
                    instance.camera.setParameters(instance.parameters);  
                }  
            }  
        });  

    }  


    private class TurnOnLight implements Runnable{  
        @Override  
        public void run() {  
            instance.parameters = instance.camera.getParameters();  
            instance.parameters.setFlashMode("torch");  
            instance.camera.setParameters(instance.parameters);  
        }  
    }  
}

3、项目下载地址

CameraLight.zip