1. 先创建AutoCompleteTextView的实例：

AutoCompleteTextView autoCompleteTextView = new AutoCompleteTextView(context);

2. 设置AutoCompleteTextView的布局参数：

autoCompleteTextView.setLayoutParams(new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));

3. 给AutoCompleteTextView设置适配器，这里使用了一个简单的字符串数组适配器：

String[] suggestions = {"Apple", "Banana", "Cherry", "Coconut"}; ArrayAdapter adapter = new ArrayAdapter(context, android.R.layout.simple_dropdown_item_1line, suggestions); autoCompleteTextView.setAdapter(adapter);

4. 最后将AutoCompleteTextView添加到父布局中：

parentLayout.addView(autoCompleteTextView);

完整示例代码：

LinearLayout parentLayout = findViewById(R.id.parent_layout);

AutoCompleteTextView autoCompleteTextView = new AutoCompleteTextView(context); autoCompleteTextView.setLayoutParams(new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));

String[] suggestions = {"Apple", "Banana", "Cherry", "Coconut"}; ArrayAdapter adapter = new ArrayAdapter(context, android.R.layout.simple_dropdown_item_1line, suggestions); autoCompleteTextView.setAdapter(adapter);

parentLayout.addView(autoCompleteTextView);