Android Open Source - AndroidRecording Adaptive Surface View

From Project

License

The source code is released under:
Apache License
If you think the Android project AndroidRecording listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

/*
 * Copyright (C) 2013 Steelkiwi Development, Julia Zudikova, Viacheslav Tyagotenkov
 * //from w w  w  .ja  v  a2  s  .c om
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.skd.androidrecording.video;

import android.content.Context;
import android.hardware.Camera;
import android.util.AttributeSet;
import android.view.SurfaceView;

/*
 * Represents a surface camera preview or media player output is drawn on.
 * Surface can adjust its size according to set preview's aspect ratio. 
 */

public class AdaptiveSurfaceView extends SurfaceView {
  private int previewWidth;
  private int previewHeight;
  private float ratio;

  public AdaptiveSurfaceView(Context context) {
    super(context);
  }
  
  public AdaptiveSurfaceView(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public AdaptiveSurfaceView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  public void setPreviewSize(Camera.Size size) {
    int screenW = getResources().getDisplayMetrics().widthPixels;
    int screenH = getResources().getDisplayMetrics().heightPixels;
    if (screenW < screenH) {
      previewWidth = size.width < size.height ? size.width : size.height;
      previewHeight = size.width >= size.height ? size.width : size.height;
    }
    else {
      previewWidth = size.width > size.height ? size.width : size.height;
      previewHeight = size.width <= size.height ? size.width : size.height;
    }
    ratio = previewHeight / (float) previewWidth;
    requestLayout();
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    int previewW     = MeasureSpec.getSize(widthMeasureSpec);
    int previewWMode = MeasureSpec.getMode(widthMeasureSpec);
    int previewH     = MeasureSpec.getSize(heightMeasureSpec);
    int previewHMode = MeasureSpec.getMode(heightMeasureSpec);

    int measuredWidth  = 0;
    int measuredHeight = 0;

    if (previewWidth > 0 && previewHeight > 0) {
      measuredWidth = defineWidth(previewW, previewWMode);
      
      measuredHeight = (int) (measuredWidth * ratio);
      if (previewHMode != MeasureSpec.UNSPECIFIED && measuredHeight > previewH) {
        measuredWidth = (int) (previewH / ratio);
        measuredHeight = previewH;
      }

      setMeasuredDimension(measuredWidth, measuredHeight);
    }
    else {
      super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
  }

  private int defineWidth(int previewW, int previewWMode) {
    int measuredWidth;
    if (previewWMode == MeasureSpec.UNSPECIFIED) {
      measuredWidth = previewWidth;
    } 
    else if (previewWMode == MeasureSpec.EXACTLY) {
      measuredWidth = previewW;
    } 
    else {
      measuredWidth = Math.min(previewW, previewWidth);
    }
    return measuredWidth;
  }
}
Java Source Code List
