在 Android 中使用 Spinner Dependable 创建动态视图

Posted 2023-02-26

【中文标题】在 Android 中使用 Spinner Dependable 创建动态视图

【英文标题】：Creating a Dynamic view with spinner Dependable in Android

【发布时间】：2015-08-26 12:53:32

【问题描述】：

我遇到了动态加载视图的问题。当我从微调器中选择第一项时，我有三个动态微调器视图，它应该在第二个微调器上方创建一个文本视图，但在第三个微调器下方创建一个视图。谁能指导我如何实现它。我在下面分享了我的代码。

/add LayoutParams
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        rl.setOrientation(LinearLayout.VERTICAL);


        // add spinner

        String[] spinnerArray = "android","ios","other";
        Spinner spinner = new Spinner(this);
        ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, spinnerArray); //selected item will look like a spinner set from XML
        spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(spinnerArrayAdapter);


        String[] spinnerArray1 = "flowers","vegetables","other";
        Spinner spinner1 = new Spinner(this);
        ArrayAdapter<String> spinnerArrayAdapter1 = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, spinnerArray1); //selected item will look like a spinner set from XML
        spinnerArrayAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner1.setAdapter(spinnerArrayAdapter1);



        String[] spinnerArray2 = "cat","dog","other";
        Spinner spinner2 = new Spinner(this);
        ArrayAdapter<String> spinnerArrayAdapter2 = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, spinnerArray2); //selected item will look like a spinner set from XML
        spinnerArrayAdapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner2.setAdapter(spinnerArrayAdapter2);


        rl.addView(spinner);
        rl.addView(spinner1);
        rl.addView(spinner2);

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() 
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
            
             if(position==1)
             
                 TextView tv = new TextView(MainActivity.this);
                 tv.setText("Hello");
                 rl.addView(tv);
             
            

            @Override
            public void onNothingSelected(AdapterView<?> parent) 

            
        );

【参考方案1】：

你知道线性布局是如何工作的吗？ http://developer.android.com/reference/android/widget/LinearLayout.html 你应该打电话给

addView(tv, 1);

指定插入视图的位置。