手机手电筒功能的实现

闲着无事网上看了一个手电筒的实现，收藏一下。

import android.app.Activity; import android.content.Context; import android.hardware.Camera; import android.hardware.camera2.CameraManager; import android.os.Build; import android.os.Bundle; import android.widget.CompoundButton; import android.widget.ToggleButton; public class MainActivity extends Activity { private ToggleButton toggleButton; private CameraManager manager; private Camera camera = null; private Camera.Parameters parameters = null; public static boolean kaiguan = true; // 定义开关状态，状态为false，打开状态，状态为true，关闭状态 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); toggleButton = (ToggleButton) findViewById(R.id.toggleButton); manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE); toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { //android6.0调用的手电筒接口 try { manager.setTorchMode("0", isChecked); } catch (Exception e) { e.printStackTrace(); } } else { //低于6.0系统的手电筒 if (isChecked) { camera = Camera.open(); parameters = camera.getParameters(); parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);// 开启 camera.setParameters(parameters); camera.startPreview(); } else { parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);// 关闭 camera.setParameters(parameters); camera.stopPreview(); camera.release(); } } } }); } @Override protected void onPause() { super.onPause(); } }