//js代码
//用代码渲染页面
let activity = plus.android.runtimeMainActivity();
let SurfaceView = plus.android.importClass("android.view.SurfaceView");
let mSurfaceView = new SurfaceView(activity);
let RelativeLayout = plus.android.importClass("android.widget.RelativeLayout");
let layout = new RelativeLayout(activity);
layout.addView(mSurfaceView);
activity.setContentView(layout);
let mSurfaceViewHolder = mSurfaceView.getHolder(); //获取了mSurfaceViewHolder
//实现 callBack
let surfaceHolderCallback = plus.android.implements("android.view.SurfaceHolder$Callback", {
"surfaceCreated":function(holder){
plus.android.importClass(holder);
initCameraAndPreview(mSurfaceView, mSurfaceViewHolder);
},
"surfaceCreated":function(holder){
plus.android.importClass(holder);
},
"surfaceChanged":function(holder, format, width, height){
plus.android.importClass(holder);
}
});
mSurfaceViewHolder.addCallback(surfaceHolderCallback); //但是这里报 addCallback is not a function
//原生java代码
android.view.SurfaceView 类中的获取mSurfaceViewHolder，原生代码中的 mSurfaceHolder 有 addCallback 方法，但是 mSurfaceHolder 是private
public SurfaceHolder getHolder() {
return mSurfaceHolder;
}
private final SurfaceHolder mSurfaceHolder = new SurfaceHolder() {
private static final String LOG_TAG = "SurfaceHolder";
@Override
public boolean isCreating() {
return mIsCreating;
}
@Override
public void addCallback(Callback callback) {
synchronized (mCallbacks) {
// This is a linear search, but in practice we'll
// have only a couple callbacks, so it doesn't matter.
if (mCallbacks.contains(callback) == false) {
mCallbacks.add(callback);
}
}
}
.......
}
问题是：为什么原生java代码中的getHolder()方法有返回mSurfaceHolder，而且 mSurfaceHolder 中有 addCallback方法，但是js代码中 mSurfaceViewHolder.addCallback(surfaceHolderCallback); 会报 addCallback is not a function ?
是不是 mSurfaceViewHolder 是 private，然后 native.js 实例化不了private属性?
