java - 将包含 textview 值的文件 .txt (ArrayList) 中的所有项目设置为 ListView [Android Java]

Question

我想要一个按钮onClick generate1()显示我的 Arraylist(.txt 中的所有项目) 包含Edittext值。

我是 android java 编程的初学者。

这是我的onClick方法generate1():

    public void generate1(View view) throws IOException {

        ArrayAdapter<String> adapter;
        ArrayList<String> ls = new ArrayList<>();
        EditText editText = (EditText) findViewById(R.id.editText);

        BufferedReader br = null;

        br = new BufferedReader(new InputStreamReader(getAssets().open("themen.txt")));
        String word;
        while ((word = br.readLine()) != null) {
            ls.add(word);
        }
        br.close();
        ListView listView = (ListView) findViewById(R.id.listView);
        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,ls);
        listView.setAdapter(adapter);

        for (String e : ls){
           if (e.toLowerCase().contains(editText.getText().toString())){
              //???? some toDO ???? (if i do here System.out.println(e); its work, but i want the Items to a listview!! 
           }
        }
    }

Answer 1

你应该创建两个全局ArrayList。首先你为所有结果命名为“ls”。第二个我为过滤结果调用“lsFiltered”；然后...

更改此

for (String e : ls){
       if (e.toLowerCase().contains(editText.getText().toString())){
          //???? some toDO ???? (if i do here System.out.println(e); its work, but i want the Items to a listview!! 
       }
    }

到此

for (int i = 0; i <ls.size() ; i++) {
        if (e.toLowerCase().contains(editText.getText().toString())){
            lsFiltered.add(ls.get(i));
        }
}
adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,lsFiltered);
listView.setAdapter(adapter);