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这篇文章主要介绍“Android中如何实现无预览拍照功能”的相关知识，小编通过实际案例向大家展示操作过程，操作方法简单快捷，实用性强，希望这篇“Android中如何实现无预览拍照功能”文章能帮助大家解决问题。
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代码如下：
public void onTakePhotoClicked() {
final SurfaceView preview = new SurfaceView(this);
SurfaceHolder holder = preview.getHolder();
// deprecated setting, but required on Android versions prior to 3.0
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
holder.addCallback(new SurfaceHolder.Callback() {
@Override
//The preview must happen at or after this point or takePicture fails
public void surfaceCreated(SurfaceHolder holder) {
Log.d(TAG, "Surface created");
camera = null;
try {
camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
Log.d(TAG, "Opened camera");
try {
camera.setPreviewDisplay(holder);
} catch (IOException e) {
throw new RuntimeException(e);
}
camera.startPreview();
Log.d(TAG, "Started preview");
//延时拍照
ThreadUtils.postOnUiThreadDelayed(new Runnable() {
@Override
public void run() {
Log.e("zgj","开始拍照");
camera.takePicture(null, null, CameraService.this);
}
},5000);
} catch (Exception e) {
if (camera != null)
camera.release();
throw new RuntimeException(e);
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {}
});
WindowManager wm = (WindowManager)getSystemService(Context.WINDOW_SERVICE);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
1, 1, //Must be at least 1x1
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
0,
//Don't know if this is a safe default
PixelFormat.UNKNOWN);
//Don't set the preview visibility to GONE or INVISIBLE
wm.addView(preview, params);
}
@Override
public void onPictureTaken(byte[] bytes, Camera camera) {
Log.e("zgj", "拍照结束");
File pictureDir = Environment.getExternalStorageDirectory();
if (pictureDir == null) {
Log.d("zgj",
"Error creating media file, check storage permissions!");
return;
}
try {
String pictureName = "ssss.png";
File file = new File(pictureDir + "/pic/");
if (!file.exists()) {
file.mkdir();
}
file = new File(pictureDir + "/pic/" + pictureName);
FileOutputStream fos = new FileOutputStream(file);
fos.write(bytes);
fos.close();
} catch (FileNotFoundException e) {
Log.d("zgj", "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d("zgj", "Error accessing file: " + e.getMessage());
}
}关于“Android中如何实现无预览拍照功能”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识，可以关注创新互联行业资讯频道，小编每天都会为大家更新不同的知识点。