Android开启手电筒功能（完美适配Android4x,5x,6x）

【Android开启手电筒功能（完美适配Android4x,5x,6x）】博观而约取，厚积而薄发。这篇文章主要讲述Android开启手电筒功能（完美适配Android4x,5x,6x）相关的知识，希望能为你提供帮助。
最近在研究开启安卓手电筒功能，总结了下android4x、5x、6x的手电筒开启方法，写成公共方法，分享给大家。

文章图片

添加摄像机和闪光灯权限

< uses-permission android:name= " android.permission.FLASHLIGHT" /> < uses-permission android:name= " android.permission.CAMERA" /> < uses-feature android:name= " android.hardware.camera" /> < uses-feature android:name= " android.hardware.autofocus" />

布局文件

< ?xml version= " 1.0" encoding= " utf-8" ?> < LinearLayout xmlns:android= " http://schemas.android.com/apk/res/android" android:layout_width= " match_parent" android:layout_height= " match_parent" android:orientation= " vertical" > < Button android:id= " @ + id/btn_open" android:layout_width= " wrap_content" android:layout_height= " wrap_content" android:layout_marginBottom= " 10dp" android:text= " 打开手电筒" /> < Button android:id= " @ + id/btn_close" android:layout_width= " wrap_content" android:layout_height= " wrap_content" android:text= " 关闭手电筒" /> < /LinearLayout>

具体实现

/** * Created by 猴子搬来的救兵Castiel * 博客地址： http://blog.csdn.net/mynameishuangshuai */public class MainActivity extends AppCompatActivity { private CameraManager manager; // 声明CameraManager对象 private Camera m_Camera = null; // 声明Camera对象@ TargetApi(Build.VERSION_CODES.LOLLIPOP) @ Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btnOpen = (Button) findViewById(R.id.btn_open); Button btnClose = (Button) findViewById(R.id.btn_close); manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE); try { String[] camerList = manager.getCameraIdList(); for (String str : camerList) { } } catch (CameraAccessException e) { Log.e(" error" , e.getMessage()); }btnOpen.setOnClickListener(new View.OnClickListener() { @ Override public void onClick(View view) { lightSwitch(false); } }); btnClose.setOnClickListener(new View.OnClickListener() { @ Override public void onClick(View view) { lightSwitch(true); } }); }/** * 手电筒控制方法 * * @ param lightStatus * @ return */ private void lightSwitch(final boolean lightStatus) { if (lightStatus) { // 关闭手电筒 if (Build.VERSION.SDK_INT > = Build.VERSION_CODES.M) { try { manager.setTorchMode(" 0" , false); } catch (Exception e) { e.printStackTrace(); } } else { if (m_Camera != null) { m_Camera.stopPreview(); m_Camera.release(); m_Camera = null; } } } else { // 打开手电筒 if (Build.VERSION.SDK_INT > = Build.VERSION_CODES.M) { try { manager.setTorchMode(" 0" , true); } catch (Exception e) { e.printStackTrace(); } } else { final PackageManager pm = getPackageManager(); final FeatureInfo[] features = pm.getSystemAvailableFeatures(); for (final FeatureInfo f : features) { if (PackageManager.FEATURE_CAMERA_FLASH.equals(f.name)) { // 判断设备是否支持闪光灯 if (null = = m_Camera) { m_Camera = Camera.open(); } final Camera.Parameters parameters = m_Camera.getParameters(); parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); m_Camera.setParameters(parameters); m_Camera.startPreview(); } } } } }/** * 判断Android系统版本是否 > = M(API23) */ private boolean isM() { if (Build.VERSION.SDK_INT > = Build.VERSION_CODES.M) { return true; } else { return false; } } }