private void setHeaderPadding(int padding) {
    headerPadding = padding;

    MarginLayoutParams mlp = (ViewGroup.MarginLayoutParams) header.getLayoutParams();
    mlp.setMargins(0, Math.round(padding), 0, 0);
    header.setLayoutParams(mlp);
  }
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.public_video_xml);
    initView();
    // 跳转到录制页面
    Init_View();

    DisplayMetrics displaymetrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
    surfaceView = (TextureView) findViewById(R.id.preview_video);

    RelativeLayout preview_video_parent = (RelativeLayout) findViewById(R.id.preview_video_parent);
    LinearLayout.LayoutParams layoutParams =
        (LinearLayout.LayoutParams) preview_video_parent.getLayoutParams();
    layoutParams.width = displaymetrics.widthPixels;
    layoutParams.height = displaymetrics.widthPixels;
    preview_video_parent.setLayoutParams(layoutParams);

    surfaceView.setSurfaceTextureListener(this);
    surfaceView.setOnClickListener(this);

    path = getIntent().getStringExtra("path");

    imagePlay = (ImageView) findViewById(R.id.previre_play);
    imagePlay.setOnClickListener(this);
    mediaPlayer = new MediaPlayer();
    mediaPlayer.setOnCompletionListener(this);
  }