以编程方式在活动视图顶部添加自定义视图
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【中文标题】以编程方式在活动视图顶部添加自定义视图【英文标题】:Add a custom view at the top of views in activity Programatically 【发布时间】:2016-07-11 02:24:13 【问题描述】:我想为我需要的每个 Activity 添加一个自定义视图(包含按钮和文本视图的布局)我的自定义视图名称是 NetworkErrorView,我还有另一个类可以帮助我观察网络状态的变化!
我想在像这样构建 NetworkErrorView 的每个活动中将我的自定义视图显示在其他视图之上
private NetworkErrorView networkErrorView=new NetworkErrorView(this).build();
当网络统计信息发生变化时,我想将可见性从 Gone 更改为 Visible(当我的网络状态更改时调用 onChange):
@Override
public void onChange(boolean isConnected)
networkErrorView.networkErorrDialog(isConnected);
我的onChange()
(方法正常工作,但是当我更改可见性时我看不到我的自定义视图!谁能帮助我??
NetworkErrorView:
public class NetworkErrorView
private ViewGroup mRootView;
private Activity mActivity;
private LinearLayoutManager mLayoutManager;
private View view;
private Animation translationIn;
private Button btnNetwork;
private LinearLayout networkContainer;
private boolean networkStatus;
public NetworkErrorView(@NonNull Activity activity)
this.mRootView = (ViewGroup) activity.findViewById(android.R.id.content);
this.mActivity = activity;
this.mLayoutManager = new LinearLayoutManager(mActivity);
public NetworkErrorView build()
view= Assist.inflater.inflate(R.layout.dialog_network_error,mRootView,false);
//View.inflate(mActivity, R.layout.dialog_network_error, mRootView);
btnNetwork=(Button) view.findViewById(R.id.btn_error_network);
btnNetwork.setOnClickListener(onClickListener);
networkContainer=(LinearLayout) view.findViewById(R.id.layout_error_networkcontainer);
translationIn= AnimationUtils.loadAnimation(mActivity,R.anim.anim_wifi_container_in);
mRootView.addView(view, 1);
return this;
public void networkErorrDialog(boolean isConnected)
networkStatus=isConnected;
if(isConnected)
view.setVisibility(View.GONE);
else
view.setVisibility(View.VISIBLE);
view.bringToFront();
translationIn= AnimationUtils.loadAnimation(mActivity, R.anim.anim_wifi_container_in);
networkContainer.setAnimation(translationIn);
View.OnClickListener onClickListener=new View.OnClickListener()
@Override
public void onClick(View v)
if(!networkStatus)
mActivity.startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));
;
mActivity:
public class mActivity extends AppCompatActivity implements NetworkObserver
private NetworkErrorView networkErrorView;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
FontManager.instance().setTypeface(getWindow().getDecorView());
addView();
NetworkManager.init(this);
//...
private void addView()
//...
networkErrorView=new NetworkErrorView(this).build();
@Override
public void onChange(boolean isConnected)
networkErrorView.networkErorrDialog(isConnected);
【问题讨论】:
【参考方案1】:我认为正在添加视图,但是由于您将视图添加到第 1 个位置,因此它没有被显示,所以尝试这样的操作
public NetworkErrorView build()
view= Assist.inflater.inflate(R.layout.dialog_network_error,mRootView,false);
//View.inflate(mActivity, R.layout.dialog_network_error, mRootView);
btnNetwork=(Button) view.findViewById(R.id.btn_error_network);
btnNetwork.setOnClickListener(onClickListener);
networkContainer=(LinearLayout) view.findViewById(R.id.layout_error_networkcontainer);
translationIn= AnimationUtils.loadAnimation(mActivity,R.anim.anim_wifi_container_in);
mRootView.addView(view, 0); //Change this form 1 to 0
return this;
【讨论】:
我试过 0,1,getChiledCount() 和 getChiledCount()-1 但不起作用 你里面的onChange方法记录((ViewGroup)findViewById(android.R.id.content)).getChildCount()
的结果
getChildCount() 的结果是 2以上是关于以编程方式在活动视图顶部添加自定义视图的主要内容,如果未能解决你的问题,请参考以下文章
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