我一直在尝试向片段动态添加按钮,但是我尝试过的所有方法都不起作用.

这些是我尝试过的一些方法：

1.

public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {

LinearLayout linearlayout = new LinearLayout(getActivity());

LinearLayout.LayoutParams buttonParams = new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.MATCH_PARENT,

LinearLayout.LayoutParams.WRAP_CONTENT);

linearlayout.setLayoutParams(buttonParams);

linearlayout.setOrientation(LinearLayout.HORIZONTAL);

Button button = new Button(getActivity());

button.setLayoutParams(buttonParams);

button.setText("????????????????????");

button.setTextSize(16);

Button button2 = new Button(getActivity());

button2.setLayoutParams(buttonParams);

button2.setText("!!!!!!!!!!!!!!!!!!");

button2.setTextSize(64);

linearlayout.addView(button);

linearlayout.addView(button2);

container.addView(linearlayout);

View myView = inflater.inflate(R.layout.fragment_general_layout, container, false);

return myView;

}

这将为我提供以下屏幕截图First method.

我真的不喜欢这样,因为这会在Activity本身上创建一个按钮,该按钮会出现在使用相同Activity的其他片段上.

>第二种方法

公共视图onCreateView(LayoutInflater充气器,@ Nullable ViewGroup容器,捆绑保存的InstanceState){

View myView = inflater.inflate(R.layout.fragment_general_layout, container, false);

for (int i = 0; i < ArrayOfNames.length; i++) {

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.MATCH_PARENT,

LinearLayout.LayoutParams.WRAP_CONTENT);

Button btn = new Button(myView.getContext());

btn.setId(i);

final int id_ = btn.getId();

btn.setText(ArrayOfNames[i]);

btn.setBackgroundColor(Color.CYAN);

btn.setLayoutParams(params);

linearlayout.addView(btn, params);

btn = myView.findViewById(id_);

btn.setVisibility(View.VISIBLE);

btn.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

//do smth

}

});

return myView;

}

我假设此方法将使按钮(因为代码运行良好,并且至少在设置OnClickListner()时按钮没有空指针引用.但是我无法在屏幕上看到实际的按钮.而且,无法单击它.

任何帮助将不胜感激.