Android camera setParameters failed 错误解决方法

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camera setParameters failed 相关的错误，大部分都是因为 previewSize 或者 pictureSize 设置不合理（即底层不支持）造成的。

网上找到的解决方案

public void surfaceCreated(SurfaceHolder holder){int PreviewWidth = 0;      int PreviewHeight = 0;MyCameraDemo.this.cam=Camera.open(0);WindowManager manager=(WindowManager)MyCameraDemo.this.getSystemService(Context.WINDOW_SERVICE);Display  display=manager.getDefaultDisplay();Parameters param=MyCameraDemo.this.cam.getParameters();List<Camera.Size> sizeList = param.getSupportedPreviewSizes(); if (sizeList.size() > 1) {     Iterator<Camera.Size> itor = sizeList.iterator();     while (itor.hasNext()) {          Camera.Size cur = itor.next();          if (cur.width >= PreviewWidth && cur.height >= PreviewHeight) {               PreviewWidth = cur.width;               PreviewHeight = cur.height;               break;               }          }     }param.setPreviewSize(PreviewWidth,PreviewHeight);param.setPictureSize(PreviewWidth,PreviewHeight);param.setPreviewFrameRate(5);param.setPictureFormat(ImageFormat.JPEG);param.set("jpeg-quality", 85);MyCameraDemo.this.cam.setParameters(param);try{MyCameraDemo.this.cam.setPreviewDisplay(MyCameraDemo.this.holder);}catch(IOException ex){ex.printStackTrace();}MyCameraDemo.this.cam.startPreview();MyCameraDemo.this.previewRunning=true;}

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