安卓开发之手电筒

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import android.hardware.Camera;
import android.hardware.Camera.Parameters;

private Camera camera = null;

打开手电筒

camera = Camera.open();          Parameters mParameters = camera.getParameters();          mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);  // 选择手电筒模式        camera.setParameters(mParameters);                         camera.autoFocus(new Camera.AutoFocusCallback() { // 自动对焦，增加成功率public void onAutoFocus(boolean success, Camera camera) {}});camera.startPreview();

关闭手电筒

if(camera != null){Parameters mParameters = camera.getParameters();              mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);              camera.setParameters(mParameters); camera.stopPreview();camera.release();camera = null;}

开启闪光灯权限：

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

闪光灯闪烁：

Camera camera = Camera.open();Parameters p = camera.getParameters();

//手电筒闪光开启private void processOnFlash(){p.setFlashMode(Parameters.FLASH_MODE_TORCH);camera.setParameters(p);camera.startPreview();}//手电筒闪光关闭private void processOffFlash(){p.setFlashMode(Parameters.FLASH_MODE_OFF);camera.setParameters(p);camera.stopPreview();}//及时释放public void surfaceDestroyed(SurfaceHolder holder) {camera.setPreviewCallback(null);camera.stopPreview();camera.release();camera = null;}

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