Android 如何在ListActivity和片段中嵌入加载进度指示器
有没有一种方法可以像调用ListFragment一样将加载进度指示器嵌入ListActivity或片段中?我可以使用加载对话框,但我希望保持一致,因为我已经在其他ListFragments中使用了setListShowed()Android 如何在ListActivity和片段中嵌入加载进度指示器,android,android-fragments,android-activity,Android,Android Fragments,Android Activity,有没有一种方法可以像调用ListFragment一样将加载进度指示器嵌入ListActivity或片段中?我可以使用加载对话框,但我希望保持一致,因为我已经在其他ListFragments中使用了setListShowed() 谢谢。我通过为类似的fragment类编写一个包装器来实现这一点 我将此用于异步填充的片段。若要使用它,请不要重写onCreateView()。相反,在onStart()中膨胀视图并使用它调用setView()。片段将以加载微调器开始。填充完视图后调用setContent
谢谢。我通过为类似的fragment类编写一个包装器来实现这一点 我将此用于异步填充的片段。若要使用它,请不要重写onCreateView()。相反,在onStart()中膨胀视图并使用它调用setView()。片段将以加载微调器开始。填充完视图后调用setContentShow(true),以删除加载的动画并显示内容
public class AsyncFragment extends Fragment {
static final int INTERNAL_PROGRESS_CONTAINER_ID = 0x00ff0001;
static final int INTERNAL_CONTENT_CONTAINER_ID = 0x00ff0002;
View mProgressContainer;
View mContentContainer;
boolean mContentShown = true;
public AsyncFragment() {}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final Context context = getActivity();
FrameLayout root = new FrameLayout(context);
// ------------------------------------------------------------------
LinearLayout pframe = new LinearLayout(context);
pframe.setId(INTERNAL_PROGRESS_CONTAINER_ID);
pframe.setOrientation(LinearLayout.VERTICAL);
pframe.setVisibility(View.GONE);
pframe.setGravity(Gravity.CENTER);
ProgressBar progress = new ProgressBar(context, null,
android.R.attr.progressBarStyleLarge);
pframe.addView(progress, new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
root.addView(pframe, new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
// ------------------------------------------------------------------
FrameLayout lframe = new FrameLayout(context);
lframe.setId(INTERNAL_CONTENT_CONTAINER_ID);
root.addView(lframe, new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
// ------------------------------------------------------------------
root.setLayoutParams(new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
return root;
}
public void setView(View v) {
FrameLayout lframe = (FrameLayout) getView().findViewById(INTERNAL_CONTENT_CONTAINER_ID);
lframe.addView(v, new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mProgressContainer = getView().findViewById(INTERNAL_PROGRESS_CONTAINER_ID);
mContentContainer = getView().findViewById(INTERNAL_CONTENT_CONTAINER_ID);
setContentShown(false, false);
}
@Override
public void onDestroyView() {
mContentShown = false;
mProgressContainer = mContentContainer = null;
super.onDestroyView();
}
public void setContentShown(boolean shown) {
setContentShown(shown, true);
}
public void setContentShownNoAnimation(boolean shown) {
setContentShown(shown, false);
}
private void setContentShown(boolean shown, boolean animate) {
mProgressContainer = getView().findViewById(INTERNAL_PROGRESS_CONTAINER_ID);
mContentContainer = getView().findViewById(INTERNAL_CONTENT_CONTAINER_ID);
if (mContentShown == shown) {
return;
}
mContentShown = shown;
if (shown) {
if (animate) {
mProgressContainer.startAnimation(AnimationUtils.loadAnimation(
getActivity(), android.R.anim.fade_out));
mContentContainer.startAnimation(AnimationUtils.loadAnimation(
getActivity(), android.R.anim.fade_in));
} else {
mProgressContainer.clearAnimation();
mContentContainer.clearAnimation();
}
mProgressContainer.setVisibility(View.GONE);
mContentContainer.setVisibility(View.VISIBLE);
} else {
if (animate) {
mProgressContainer.startAnimation(AnimationUtils.loadAnimation(
getActivity(), android.R.anim.fade_in));
mContentContainer.startAnimation(AnimationUtils.loadAnimation(
getActivity(), android.R.anim.fade_out));
} else {
mProgressContainer.clearAnimation();
mContentContainer.clearAnimation();
}
mProgressContainer.setVisibility(View.VISIBLE);
mContentContainer.setVisibility(View.GONE);
}
}