首先闪光灯可以用android.hardware.camera来控制。
1.添加权限
<uses-permission android:name="android.permission.FLASHLIGHT" /> <uses-permission android:name="android.permission.CAMERA"/> <uses-feature android:name="android.hardware.camera" />
2.获得Camera对象，通过Camera.open()开启摄像头。
Camera camera = Camera.open();
3.打开闪光灯
public static void turnLightOn(Camera mCamera) {
if (mCamera == null) {
3 return;
}
Parameters parameters = mCamera.getParameters();
6 if (parameters == null) {
7 return;
8 }
List<String> flashModes = parameters.getSupportedFlashModes();
// Check if camera flash exists
if (flashModes == null) {
// Use the screen as a flashlight (next best thing)
return;
}
String flashMode = parameters.getFlashMode();
if (!Parameters.FLASH_MODE_TORCH.equals(flashMode)) {
// Turn on the flash
18 if (flashModes.contains(Parameters.FLASH_MODE_TORCH)) {
19 parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);
mCamera.setParameters(parameters);
} else {
}
}
24 }4.关闭闪光灯
public static void turnLightOff(Camera mCamera) {
if (mCamera == null) {
return;
4 }
5 Parameters parameters = mCamera.getParameters();
6 if (parameters == null) {
7 return;
8 }
9 List<String> flashModes = parameters.getSupportedFlashModes();
10 String flashMode = parameters.getFlashMode();
11 // Check if camera flash exists
12 if (flashModes == null) {
13 return;
14 }
15 if (!Parameters.FLASH_MODE_OFF.equals(flashMode)) {
16 // Turn off the flash
17 if (flashModes.contains(Parameters.FLASH_MODE_OFF)) {
18 parameters.setFlashMode(Parameters.FLASH_MODE_OFF);
19 mCamera.setParameters(parameters);
20 } else {
Log.e(TAG, "FLASH_MODE_OFF not supported");
}
}
}5.关闭闪光灯后记得释放Camear对象
camera.release();
源代码：Flashlight.7z