android将闪光灯作为手电筒的实现代码，android手电筒,手电筒是使用Androi

android将闪光灯作为手电筒的实现代码，android手电筒,手电筒是使用Androi

手电筒是使用Android手机的闪光灯，所以需添加权限<uses-permission android:name="android.permission.CAMERA" />

import com.jwzhangjie.test.R;  import android.app.Activity;  import android.hardware.Camera;  import android.hardware.Camera.Parameters;  import android.os.Bundle;  import android.view.View;  import android.view.View.OnClickListener;  import android.widget.Button;  /**  * 手电筒  * @author jwzhangjie  *  */  public class CameraLight extends Activity{      private Button openLight;      private boolean status = false;      private Camera camera;      private Parameters parameters;      private CameraLight instance;      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.cameralight);          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);          }      }   }