android閃光燈操作代碼

實例關鍵代碼如下:

Camera mCamera;
Parameters mParameters;

// 檢測當前設備是否配置閃光燈
boolean checkFlashlight(View view) {
	if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)) {
		Toast.makeText(this, "當前設備沒有閃光燈", Toast.LENGTH_LONG).show();
		return false;
	}
	return true;
}

// 打開閃光燈
void openFlashlight() {
	
	try {
		mCamera = Camera.open();
		int textureId = 0;
		mCamera.setPreviewTexture(new SurfaceTexture(textureId));
		mCamera.startPreview();

		mParameters = mCamera.getParameters();

		mParameters.setFlashMode(Parameters.FLASH_MODE_TORCH);
		mCamera.setParameters(mParameters);

	} catch (Exception e) {
		// TODO: handle exception
	}
}

// 關閉閃光燈
void closeFlashlight() {

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