Android调用Camera实现自定义照相

核心提示：.getExternalStorageDirectory().getAbsolutePath() + "/img.jpeg"); l.setBackgroundDrawable(d); try { } catch (Exception e) { e.printStackTrace(); } } };

.getExternalStorageDirectory().getAbsolutePath()
+ "/img.jpeg");
l.setBackgroundDrawable(d);
try {
} catch (Exception e) {
e.printStackTrace();
}
}

};

// 按钮 布局等定义，不作赘述
Button btn1 = null;
Button btn2 = null;
LinearLayout l = null;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
setContentView(R.layout.main);

l = (LinearLayout) findViewById(R.id.cameraView);
btn1 = (Button) findViewById(R.id.btn1);
btn2 = (Button) findViewById(R.id.btn2);

btn1.setOnClickListener(this);
btn2.setOnClickListener(this);
}

//主要的surfaceView，负责展示预览图片，camera的开关
class CameraView extends SurfaceView {

//
private SurfaceHolder holder = null;

public CameraView(Context context) {
super(context);
holder = this.getHolder();

holder.addCallback(new SurfaceHolder.Callback() {

@Override
public void surfaceChanged(SurfaceHolder holder, int format,
int width, int height) {
Camera.Parameters parameters = camera.getParameters();
//以下注释掉的是设置预览时的图像以及拍照的一些参数
// parameters.setPictureFormat(PixelFormat.JPEG);
// parameters.setPreviewSize(parameters.getPictureSize().width,
// parameters.getPictureSize().height);
// parameters.setFocusMode("auto");
// parameters.setPictureSize(width, height);
camera.setParameters(parameters);
camera.startPreview();
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();

try {
//设置camera预览的角度，因为默认图片是倾斜90度的
camera.setDisplayOrientation(90);
//设置holder主要是用于surfaceView的图片的实时预览，以及获取图片等功能，可以理解为控制camera的操作..
camera.setPreviewDisplay(holder);
} catch (IOException e) {
camera.release();
camera = null;
e.printStackTrace();
}

}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
//顾名思义可以看懂
camera.stopPreview();
camera.release();
camera = null;
}
});
// holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
}

@Override
public void onClick(View v) {
if (v == btn1) {
l.removeAllViews();
cv = new CameraView(Test.this);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.FILL_PARENT);
l.addView(cv, params);
} else if (v == btn2) {
camera.takePicture(null, null, picture);
}
}
}