setContentView和侦听器 [英] setContentView and Listeners

问题描述

我有时会更改Activity的ContentView. (至View2). 将其更改回View1后，侦听器将不再工作. 我已经尝试过将Listener放在onResume()方法中.

I'm changing my ContentView of the Activity at some point. (to View2). After changing it back to View1, the listeners are not more working. I already tried putting the Listener in the onResume() method.

使用setContentView()来显示例如进度屏幕/请等待，...(正在运行asyncTask时). 还是每个活动只有一个mainView? (并动态替换内容).

Is it common anyway to use setContentView() to display e.g. a Progress screen/please wait,...(while an asyncTask is running). Or should you only have ONE mainView for each Activity? (and replacing the content dynamically).

//具体来说: 我正在寻找类似的东西

// To be more specific: I am looking for something like

LinearLayout item = (LinearLayout) findViewById(R.id.mainView);
View child = getLayoutInflater().inflate(R.layout.progress, null);
item.addView(child);

但不应添加"progress.xml"，而应删除当前布局并仅显示"progress.xml". 我需要一个容器"并显示/隐藏mainView/progress吗? 但这对我来说似乎不太合适...

but instead of adding the "progress.xml", it should remove the current layout and ONLY show "progress.xml". Do I need an "container" and show/hide mainView/progress? But that doesn't seem very proper to me...

另请参见下面的代码(已剥离)

See also code below (stripped)

public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.view1);

       button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                doSomething();
            }
        });
}

setContentView(R.layout.view2);
[...]
setContentView(R.layout.view1);

//Listener not more working

推荐答案

感谢大家的答复.您让我意识到，当我删除或替换(使用setContentView())主视图时，onClickListeners会迷路.我现在这样结束了:

Thank you all, for your reply. You made me realize, the onClickListeners are getting lost when I remove or replace (using setContentView()) the main view. I ended up this way now:

onCreate:

setContentView(R.layout.parse);
LinearLayout container = (LinearLayout) findViewById(R.id.container);
container.addView(getLayoutInflater().inflate(R.layout.dialog, null));
container.addView(getLayoutInflater().inflate(R.layout.progress, null));

onStartDoingSomething:

onStartDoingSomething:

findViewById(R.id.dialog).setVisibility(View.INVISIBLE);
findViewById(R.id.progress).setVisibility(View.VISIBLE);

onEndDoingSomehting:

onEndDoingSomehting:

findViewById(R.id.dialog).setVisibility(View.VISIBLE);
findViewById(R.id.progress).setVisibility(View.INVISIBLE);

我可能会像nmr所说的那样将View.INVISIBLE更改为View.GONE，但是由于我从未使用过View.GONE，因此我必须先检查Android doku;)

I might change View.INVISIBLE to View.GONE, like nmr said, but since I have never used View.GONE, I have to check the Android doku first ;)

这篇关于setContentView和侦听器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！