实现手机App实现拍照功能结果如下
第一步:
activity_takephoto.xml布局用SurfaceView
第二步：TakephotoActivity类
public class TakephotoActivity extends AppCompatActivity {
private SurfaceView sv_takephoto;
private Button b_OK;
private Button b_qh;
private Camera camera;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_takephoto);
//获得SurfaceView的ID
sv_takephoto =(SurfaceView) findViewById(R.id.sv_takephoto);
//获得拍照的ID
b_OK =(Button)findViewById(R.id.b_OK);
//获得切换镜头的ID
b_qh =(Button)findViewById(R.id.b_qh);
sv_takephoto.getHolder().addCallback(new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
//打开相机
camera = Camera.open();
//给相机设置参数
Camera.Parameters parameters= camera.getParameters();
//设置保存的格式
parameters.setPictureFormat(PixelFormat.JPEG);
parameters.set("jpeg-quality",85);
camera.setParameters(parameters);
//将画面展示到SurfaceView中
try {
camera.setPreviewDisplay(sv_takephoto.getHolder());
//开启预览
camera.startPreview();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
}
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
}
});
//拍照的点击事件
b_OK.setonClickListener(new View.onClickListener() {
@Override
public void onClick(View view) {
//拍照
camera.takePicture(null, null, new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] bytes, Camera camera) {
//将字节数组转成图片
Bitmap bitmap= BitmapFactory.decodeByteArray(bytes,0,bytes.length);
try {
FileOutputStream fos=new FileOutputStream("/mnt/sdcard/DCIM/"+System.currentTimeMillis()+".jpg");
bitmap.compress(Bitmap.CompressFormat.PNG,85,fos);
camera.stopPreview();
camera.startPreview();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
});
}
});
}
}
第三步：在AndroidManifest.xml中加权限
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。
