以编程方式在活动视图顶部添加自定义视图

Question

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);
}
}

Answer 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;
}