Android Camera2 Deferred Surface

open camera -> create session -> repeating request

// 1. 根据最终选择的预览size创建OutputConfiguration
OutputConfiguration previewOutputConfig = new OutputConfiguration(previewSize, SurfaceHolder.class);

// 2. 使用createCaptureSessionByOutputConfigurations创建相机会话
List<OutputConfiguration> outputConfigurations = new ArrayList<>();
outputConfigurations.add(previewOutputConfig);
device.createCaptureSessionByOutputConfigurations(outputConfigurations, sessionCallback, null);

// 3. Surface ready后
previewOutputConfig.addSurface(mSurfaceHolder.getSurface());

// 4. 在sessionCallback#onConfigured回调中更新output config
session.finalizeOutputConfigurations(outputConfigurations);

// 5. 启动预览
session.setRepeatingRequest(...);