android 没有调用 textchangelistener

Question

我有以下问题：

在一个片段中，假设是 FragmentTest，我有以下线程：

new Thread(new Runnable() {
    public void run() {
    ...
        if (condition) {
             if (isAdded()) {
        getActivity.runOnUiThread(new Runnable () {
    public void run() {           
             rightEditText.addTextChangedListener(FragmentTest.this);} } 
          }
        }
       }
    ...
    }
}).start;

onCreate 方法内部。

FragmentTest实现了TextWatcher接口，但调用了none接口方法

Answer 1

public class MainActivity extends AppCompatActivity implements TextWatcher {
EditText edttext;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
   
    edttext = (EditText) findViewById(R.id.editText);
    edttext.addTextChangedListener(this);
}


@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

}

@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
  runOnUiThread(new Runnable() {
      @Override
      public void run() {
         Toast.makeText(MainActivity.this,"change",Toast.LENGTH_SHORT).show();
      }
  });
}

@Override
public void afterTextChanged(Editable editable) {

}

}

Answer 2

正在将评论迁移到答案：

Why do you need to do this inside a separate thread? I think the problem is that all the UI components run on the main UI thread. Try it without the thread.

我想这里不需要进一步的解释。 OP 将他的代码迁移到 UI 线程并且成功了。

android 没有调用 textchangelistener

android textchangelistener is not called

android

android-edittext

android-textwatcher